{"id":6607,"date":"2025-05-27T11:29:23","date_gmt":"2025-05-27T09:29:23","guid":{"rendered":"https:\/\/www.siphoniker.at\/?p=6607"},"modified":"2025-06-05T12:00:13","modified_gmt":"2025-06-05T10:00:13","slug":"smjernice-za-dimenzioniranje-odvodnje-s-krovova-balkona-i-terasa","status":"publish","type":"post","link":"https:\/\/www.siphoniker.at\/hr\/smjernice-za-dimenzioniranje-odvodnje-s-krovova-balkona-i-terasa\/","title":{"rendered":"Smjernice za dimenzioniranje odvodnje s krovova, balkona i terasa"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"6607\" class=\"elementor elementor-6607 elementor-6303\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8105334 e-flex e-con-boxed e-con e-parent\" data-id=\"8105334\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b52cb56 elementor-widget elementor-widget-text-editor\" data-id=\"b52cb56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Ovaj vodi\u010d pru\u017ea sveobuhvatan uvod u tehni\u010dke zahtjeve i izra\u010dune za dimenzioniranje sustava odvodnje za krovove, balkone i terase. Razmatraju se razli\u010dita rje\u0161enja odvodnje i njihove specifi\u010dne prednosti i nedostaci kako bi se osiguralo pouzdano i standardno uskla\u0111eno projektiranje. Cilj je sprije\u010diti o\u0161te\u0107enja od vlage i poplave u\u010dinkovitim rje\u0161enjima odvodnje te osigurati dugoro\u010dnu funkcionalnost i sigurnost zgrade.<\/strong><\/p><p>Obilne ki\u0161e, koje mogu dovesti do poplava i o\u0161te\u0107enja zgrada, nazivaju se ekstremnim vremenskim doga\u0111ajima, ali velike koli\u010dine oborina koje se lokalno javljaju u kratkom vremenskom razdoblju gotovo su postale norma. Za to se \u010desto krive klimatske promjene &#8211; stvarnost s kojom se moramo pomiriti, svi\u0111alo nam se to ili ne. Zbog toga je jo\u0161 va\u017enije pa\u017eljivo projektirati i izvesti odvodnju oborinskih voda zgrade &#8211; posebno za krovove, balkone i terase &#8211; u skladu sa standardima kako bi se izbjegla \u0161teta od vode.<\/p><p>Dokaz o projektiranju sustava za odvodnju oborinskih voda u skladu sa standardima zahtijeva hidrauli\u010dki izra\u010dun specifi\u010dan za projekt i sveobuhvatnu dokumentaciju.<\/p><h3>Osnove odvodnje ki\u0161nice<\/h3><p>Prije nego \u0161to pogledamo konkretan primjer interpretacije, bitno je znati neke osnove i razlike.<\/p><p><strong>Od \u010dega se sastoji sustav odvodnje krova?<br \/><\/strong><\/p><p>Najva\u017enije komponente krovnog sustava odvodnje su:<\/p><ul><li>Krovni oluci ili krovni slivnici (moraju biti sigurno integrirani u hidroizolaciju)<\/li><li>Odvodne cijevi<\/li><li>Sustav za pri\u010dvr\u0161\u0107ivanje cijevi<\/li><li>Ako je potrebno, izolacija od kondenzacije oborinskih cijevi<\/li><li>Mjere za za\u0161titu od po\u017eara, buke i zvuka<\/li><\/ul><p>\u00a0<\/p><p>Odabrane komponente uvelike ovise o vrsti odabranog sustava odvodnje. Sada \u0107e se raspravljati o tome koji osnovni sustavi odvodnje postoje i kako se razlikuju.<\/p><h3>Diferencijacija prema metodi odvodnje<\/h3><p>U odvodnji oborinskih voda razlikuju se dva osnovna sustava. Oba sustava se zna\u010dajno razlikuju u pogledu rasporeda cijevi i dimenzioniranja cijevi.<\/p><p><strong>Gravitacijska odvodnja (princip gravitacije)<br \/><\/strong>U konvencionalnoj (klasi\u010dnoj) odvodnji, ki\u0161nica se odvodi gravitacijom putem odvodnih cijevi polo\u017eenih pod nagibom. To se naziva i <strong>gravitacijska odvodnja.<\/strong><\/p><p>U procesu projektiranja pretpostavlja se da su horizontalne cijevi za oborinske vode napunjene vodom do otprilike 70%, dok su vertikalne cijevi za odvodnju napunjene do oko 33%. Ove vrijednosti poma\u017eu u ispravnom odre\u0111ivanju potrebnih dimenzija cijevi.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-515c24e e-flex e-con-boxed e-con e-parent\" data-id=\"515c24e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1245776 elementor-widget elementor-widget-image\" data-id=\"1245776\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"566\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb01_Schema-Freispiegelentwasserung-1024x724.png\" class=\"attachment-large size-large wp-image-6468\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb01_Schema-Freispiegelentwasserung-1024x724.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb01_Schema-Freispiegelentwasserung-300x212.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb01_Schema-Freispiegelentwasserung-768x543.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb01_Schema-Freispiegelentwasserung-1536x1086.png 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb01_Schema-Freispiegelentwasserung-2048x1448.png 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb01_Schema-Freispiegelentwasserung-1920x1357.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 1: Shema gravitacijske odvodnje<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2974fd8 e-flex e-con-boxed e-con e-parent\" data-id=\"2974fd8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-690c02e elementor-widget elementor-widget-spacer\" data-id=\"690c02e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5524aaa elementor-widget elementor-widget-text-editor\" data-id=\"5524aaa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Vakuumska \/ podtla\u010dna odvodnja (princip usisavanja)<br \/><\/strong>Nasuprot tome, <strong>vakuumska\/podtla\u010dna ili sifonska krovna odvodnja<\/strong> radi prema principu potpunog punjenja odvodnih cijevi. Ki\u0161nica se doslovno usisava s krova. Kod malih koli\u010dina oborina, usisni u\u010dinak se javlja samo sporadi\u010dno ili se uop\u0107e ne javlja, tako da se prednosti ovog sustava u potpunosti ostvaruju tek kada ima dovoljno oborina. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f669c28 e-flex e-con-boxed e-con e-parent\" data-id=\"f669c28\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8c8ee3d elementor-widget elementor-widget-image\" data-id=\"8c8ee3d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"566\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb02_Schema-Unterdruckentwasserung-1024x724.png\" class=\"attachment-large size-large wp-image-6479\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb02_Schema-Unterdruckentwasserung-1024x724.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb02_Schema-Unterdruckentwasserung-300x212.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb02_Schema-Unterdruckentwasserung-768x543.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb02_Schema-Unterdruckentwasserung-1536x1086.png 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb02_Schema-Unterdruckentwasserung-2048x1448.png 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb02_Schema-Unterdruckentwasserung-1920x1357.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 2: Shema podtla\u010dne odvodnje<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a79ac65 e-flex e-con-boxed e-con e-parent\" data-id=\"a79ac65\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ba021bd elementor-widget elementor-widget-text-editor\" data-id=\"ba021bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Kada se koji sustav koristi?<\/h3><p>Danas se velike krovne povr\u0161ine \u0161irokog raspona po\u017eeljno odvodnjavaju kori\u0161tenjem principa negativnog tlaka, jer ovaj sustav zahtijeva manje materijala i rada. Zahvaljuju\u0107i polaganju cijevi bez nagiba ispod krovne konstrukcije, \u0161to je dopu\u0161teno ovim sustavom, odvodnja negativnim tlakom nudi rje\u0161enje za u\u0161tedu prostora, posebno u skladi\u0161tima s visokim regalima. Projektiranje i prora\u010dun takvih sustava provodi gotovo isklju\u010divo odgovaraju\u0107i dobavlja\u010d sustava.<\/p><p>Nisu sve krovne povr\u0161ine prikladne za odvodnju principom negativnog tlaka, kao npr. krovne terase, balkoni ili krovovi stambenih zgrada. U odre\u0111enim slu\u010dajevima, konvencionalna odvodnja mo\u017ee biti bolji izbor i za skladi\u0161ta ili proizvodne hale.\u00a0<\/p><p>Koji su argumenti u korist konvencionalne\/gravitacijske odvodnje:<\/p><ul><li>Projektiranje sustava mo\u017ee provesti sam projektant u jednostavnim koracima koriste\u0107i norme EN1253-2 i EN12056-3. <strong>Nema ovisnosti o dobavlja\u010du sustava!<\/strong><\/li><li>Kod krovnih konstrukcija s niskim koeficijentom otjecanja, poput zelenih krovova, ki\u0161nica se zadr\u017eava i ispu\u0161ta u odvod u manjim koli\u010dinama, tako da se ne mo\u017ee posti\u0107i potpuno punjenje cijevi. U ovom slu\u010daju, sustav s cijevima polo\u017eenim pod nagibom ima vi\u0161e smisla<\/li><li>Kod male koli\u010dine vode i horizontalnog rasporeda cijevi bez nagiba (vakuumska odvodnja), pove\u0107ava se rizik od za\u010depljenja jer se <strong>gubi u\u010dinak samo\u010di\u0161\u0107enja<\/strong> zbog nepotpunog punjenja cijevi. I ovdje konvencionalna odvodnja ima vi\u0161e smisla<\/li><\/ul><p>\u00a0<\/p><p>Koji od ta dva sustava u kona\u010dnici ima najvi\u0161e smisla s ekonomskog i tehni\u010dkog gledi\u0161ta trebao bi projektant uvijek provjeriti od slu\u010daja do slu\u010daja.\u00a0<\/p><p>Budu\u0107i da projektiranje odvodnje s negativnim tlakom uvijek ovisi o sustavu ili proizvo\u0111a\u010du te se stoga ne mogu dati generalizirane tvrdnje o projektiranju i izvedbi, to se ne\u0107e razmatrati u ovim smjernicama. U nastavku \u0107e se detaljno analizirati projektiranje gravitacijske odvodnje.\u00a0<\/p><p>Me\u0111utim, za gravitacijsku odvodnju potrebno je napraviti jo\u0161 dvije podjele. Jedna podjela prema rasporedu cjevovoda i jedna prema na\u010dinu spajanja.\u00a0<\/p><h3>Podjela prema rasporedu cijevi<\/h3><p>Kod konvencionalne gravitacijske odvodnje, dodatna, va\u017ena karakteristika je shema rasporeda cijevi.<\/p><p><strong>Pojedina\u010dni priklju\u010dak cijevi, zatvoreni sustav<br \/><\/strong>Svaki krovni odvod je zasebno spojen na odvodnu cijev iste dimenzije bez prekida.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-69333b3 e-flex e-con-boxed e-con e-parent\" data-id=\"69333b3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d6b1699 elementor-widget elementor-widget-image\" data-id=\"d6b1699\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"566\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb03_Schema-geschlossenes-System-1024x724.png\" class=\"attachment-large size-large wp-image-6487\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb03_Schema-geschlossenes-System-1024x724.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb03_Schema-geschlossenes-System-300x212.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb03_Schema-geschlossenes-System-768x543.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb03_Schema-geschlossenes-System-1536x1086.png 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb03_Schema-geschlossenes-System-2048x1448.png 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb03_Schema-geschlossenes-System-1920x1357.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 3: Shema zatvorenog sustava (pojedina\u010dne cijevi)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b3ecccd e-flex e-con-boxed e-con e-parent\" data-id=\"b3ecccd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f3013d1 elementor-widget elementor-widget-text-editor\" data-id=\"f3013d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Zatvoreni sustav zna\u010di da je krovni odvod \u010dvrsto spojen s odvodnom cijevi kao \u0161to je prikazano na slici 4. Krovni odvod i cijev moraju biti istih dimenzija cijelom du\u017einom.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3bd3c5d e-flex e-con-boxed e-con e-parent\" data-id=\"3bd3c5d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ebdcc9f elementor-widget elementor-widget-image\" data-id=\"ebdcc9f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"566\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb04_Detail-geschlossenes-System_korr-1024x724.png\" class=\"attachment-large size-large wp-image-7120\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb04_Detail-geschlossenes-System_korr-1024x724.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb04_Detail-geschlossenes-System_korr-300x212.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb04_Detail-geschlossenes-System_korr-768x543.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb04_Detail-geschlossenes-System_korr-1536x1086.png 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb04_Detail-geschlossenes-System_korr-2048x1448.png 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb04_Detail-geschlossenes-System_korr-1920x1357.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 4 Detalj: Zatvoreni sustav<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7bb5e3a e-flex e-con-boxed e-con e-parent\" data-id=\"7bb5e3a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e6b711b elementor-widget elementor-widget-spacer\" data-id=\"e6b711b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a272477 elementor-widget elementor-widget-text-editor\" data-id=\"a272477\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Zbirni priklju\u010dni cjevovod, otvoreni sustav<br \/><\/strong>Nekoliko krovnih odvoda spojeno je na glavnu cijev pomo\u0107u sabirne i olu\u010dne cijevi<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-792cfca e-flex e-con-boxed e-con e-parent\" data-id=\"792cfca\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-95de8f2 elementor-widget elementor-widget-image\" data-id=\"95de8f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"566\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb05_Schema-offenes-System-mit-Kanal-1024x724.png\" class=\"attachment-large size-large wp-image-6503\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb05_Schema-offenes-System-mit-Kanal-1024x724.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb05_Schema-offenes-System-mit-Kanal-300x212.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb05_Schema-offenes-System-mit-Kanal-768x543.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb05_Schema-offenes-System-mit-Kanal-1536x1086.png 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb05_Schema-offenes-System-mit-Kanal-2048x1448.png 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb05_Schema-offenes-System-mit-Kanal-1920x1357.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 5: Otvoreni sustav, zbirni cjevovod<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-eb6eb57 e-flex e-con-boxed e-con e-parent\" data-id=\"eb6eb57\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e0e2058 elementor-widget elementor-widget-spacer\" data-id=\"e0e2058\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b1066bd elementor-widget elementor-widget-text-editor\" data-id=\"b1066bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Otvoreni sustav zna\u010di da je krovni odvod (kao na slici 6) spojen na horizontalnu cijev i slobodno te\u010de u ve\u0107u dimenzioniranu odvodnu cijev koja je otvorena s obje strane.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2ebdc33 e-flex e-con-boxed e-con e-parent\" data-id=\"2ebdc33\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a56e7d3 elementor-widget elementor-widget-image\" data-id=\"a56e7d3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"566\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb06_Detail-offenes-System-1024x724.png\" class=\"attachment-large size-large wp-image-6511\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb06_Detail-offenes-System-1024x724.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb06_Detail-offenes-System-300x212.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb06_Detail-offenes-System-768x543.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb06_Detail-offenes-System-1536x1086.png 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb06_Detail-offenes-System-2048x1448.png 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb06_Detail-offenes-System-1920x1357.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 6 Detalj: Otvoreni sustav<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-aef6e9b e-flex e-con-boxed e-con e-parent\" data-id=\"aef6e9b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6841185 elementor-widget elementor-widget-text-editor\" data-id=\"6841185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>U na\u010delu se mo\u017ee pretpostaviti da se u zatvorenim sustavima posti\u017ee ve\u0107i kapacitet odvodnje. To je zbog toga \u0161to se usisni u\u010dinak poja\u010dava spajanjem cijevi iste dimenzije u cijelom sustavu.<\/p><h3>Smjernice za projektiranje i izvo\u0111enje<\/h3><p>Prije po\u010detka dimenzioniranja i projektiranja, potrebno je utvrditi i specificirati neke osnovne informacije i podatke o gra\u0111evinskom projektu.<\/p><p>To uklju\u010duje:<\/p><ul><li>Detaljni gra\u0111evinski planovi s podru\u010djima koja \u0107e se odvodnjavati<\/li><li>Krovna konstrukcija, hidroizolacija i kori\u0161teni materijali<\/li><li>Dopu\u0161tena stati\u010dka optere\u0107enja za odre\u0111ivanje maksimalne dopu\u0161tene visine akumulacije vode<\/li><li>Adresa ili po\u0161tanski broj gra\u0111evinskog projekta (va\u017eno za izra\u010dun intenziteta oborina)<\/li><li>Raspored cijevi<ul><li>Pojedina\u010dni ili zbirni priklju\u010dni cjevovodi<\/li><li>Zatvoreni ili otvoreni sustav<\/li><\/ul><\/li><\/ul><p>\u00a0<\/p><p>Na temelju tih podataka, potrebno je odrediti izra\u010dunatu koli\u010dinu oborina, koeficijent otjecanja i kapacitet odvodnje kori\u0161tenih krovnih odvoda.<\/p><p><strong>Izra\u010dun koli\u010dine oborina (r)<br \/><\/strong>Prvi korak u dimenzioniranju odvodnog sustava je odre\u0111ivanje prora\u010dunske koli\u010dine oborina r. To je osnova za svaki odvodni sustav.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-917cdc2 e-flex e-con-boxed e-con e-parent\" data-id=\"917cdc2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb06dae elementor-widget elementor-widget-image\" data-id=\"fb06dae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"384\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb07-1024x491.png\" class=\"attachment-large size-large wp-image-6519\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb07-1024x491.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb07-300x144.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb07-768x368.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb07.png 1500w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 7: Austrijska mre\u017ea za mjerenje oborina<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c040157 e-flex e-con-boxed e-con e-parent\" data-id=\"c040157\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d0b084d elementor-widget elementor-widget-spacer\" data-id=\"d0b084d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec5f3fd elementor-widget elementor-widget-text-editor\" data-id=\"ec5f3fd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Krovna odvodnja treba biti dimenzionirana za 5-minutni doga\u0111aj oborina s 5-godi\u0161njom u\u010destalo\u0161\u0107u ponavljanja. U pravilu, projektirana koli\u010dina oborina za odgovaraju\u0107u lokaciju treba se preuzeti od Dr\u017eavnog hodrometeorolo\u0161kog zavoda (u Austriji iz skupova podataka Saveznog ministarstva poljoprivrede, \u0161umarstva, okoli\u0161a i vodnog gospodarstva (<a href=\"https:\/\/ehyd.gv.at\/\" target=\"_blank\" rel=\"noopener\">Bundesministerium f\u00fcr Land- und Forstwirtschaft, Umwelt und Wasserwirtschaft<\/a>), a zatim pretvoriti u projektiranu koli\u010dinu oborina u l\/(s \u2022 ha). Minimalna projektirana koli\u010dina oborina za krovne povr\u0161ine i povr\u0161ine nekretnina postavljena je na 300 l\/(s \u2022 ha).<\/p><p>Krovna odvodnja dimenzionira se u skladu s HRN EN 12056-3:2000, odjeljak 4.1. Ove vrijednosti mogu se razlikovati ovisno o regijama i zemljama.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6598841 e-flex e-con-boxed e-con e-parent\" data-id=\"6598841\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-821a61a elementor-widget elementor-widget-image\" data-id=\"821a61a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"698\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_1_EN-1024x894.jpg\" class=\"attachment-large size-large wp-image-7204\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_1_EN-1024x894.jpg 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_1_EN-300x262.jpg 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_1_EN-768x671.jpg 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_1_EN-1536x1341.jpg 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_1_EN-2048x1788.jpg 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_1_EN-1920x1677.jpg 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 8: Projektirana koli\u010dina oborina od 5 minuta za petogodi\u0161nji ki\u0161ni doga\u0111aj u Fischamend (Austrija)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9fb58d0 e-flex e-con-boxed e-con e-parent\" data-id=\"9fb58d0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b52ce29 elementor-widget elementor-widget-spacer\" data-id=\"b52ce29\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-032789c elementor-widget elementor-widget-text-editor\" data-id=\"032789c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Koeficijent odvodnje (C)<br \/><\/strong>Zatim se mora odrediti koeficijent odvodnje C. Koeficijent odvodnje je omjer izme\u0111u koli\u010dine ki\u0161e koja trenutno pada na podru\u010dje odvodnje i koli\u010dine koja se stvarno dovodi u odvod. Kvaliteta povr\u0161ine krova ovdje igra zna\u010dajnu ulogu. Na primjer, zeleni krov s koeficijentom odvodnje od 0,3 smanjuje otjecanje ki\u0161nice za otprilike dvije tre\u0107ine.<\/p><p><strong>Prema \u00d6NORM B 2501<\/strong> vrijede sljede\u0107e vrijednosti:<\/p><ul><li>C = 1,0 za limene krovove, krovove s crijepnim pokrovom, zatvorene betonske povr\u0161ine, krovove od folije, poplo\u010dane povr\u0161ine s fugiranim spojevima, zatvorene krovove bez balasta<\/li><li>C = 0,8 za \u0161ljun\u010dane krovove, \u0161ljun\u010dane staze, poplo\u010dane povr\u0161ine bez fugiranja i ekstenzivne zelene krovove s debljinom sloja ne ve\u0107om od 8 cm<\/li><li>C = 0,5 za smanjeno ekstenzivno ozelenjavanje s debljinom sloja ve\u0107om od 8 cm<\/li><li>C = 0,3 za ekstenzivno i intenzivno ozelenjavanje s debljinom sloja od 10 cm ili vi\u0161e<\/li><li>C = 0,1 za intenzivno ozelenjavanje s debljinom sloja od 25 cm ili vi\u0161e<\/li><\/ul><p>\u00a0<\/p><p><strong>Odvodnja ki\u0161nice (Q)<br \/><\/strong>Koli\u010dina ki\u0161nice <strong>Q<\/strong> izra\u010dunava se iz veli\u010dine povr\u0161ine koja se odvodnjava <strong>A<\/strong>, relevantne koli\u010dine oborina <strong>r<\/strong> i koeficijenta odvodnje <strong>C<\/strong>, a izra\u010dunava se pomo\u0107u sljede\u0107e formule:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-94a3c48 e-flex e-con-boxed e-con e-parent\" data-id=\"94a3c48\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8d029a5 elementor-widget elementor-widget-image\" data-id=\"8d029a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"153\" height=\"49\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_0.png\" class=\"attachment-large size-large wp-image-6352\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_0.png 153w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_0-150x49.png 150w\" sizes=\"(max-width: 153px) 100vw, 153px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4cbaeb7 e-flex e-con-boxed e-con e-parent\" data-id=\"4cbaeb7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b850870 elementor-widget elementor-widget-spacer\" data-id=\"b850870\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d16e9d6 elementor-widget elementor-widget-text-editor\" data-id=\"d16e9d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Gdje je:<\/p><ul><li>Q za otjecanje ki\u0161nice u litrama u sekundi (l\/s)<\/li><li>r za projektiranu koli\u010dinu oborina u litrama po sekundi i hektaru (l\/s\u00b7ha)<\/li><li>A za efektivnu povr\u0161inu krova u kvadratnim metrima (m\u00b2)<\/li><li>C za koeficijent odvodnje, koji uzima u obzir zadr\u017eavanje ili usporavanje uzrokovano povr\u0161inom krova<\/li><\/ul><p>\u00a0<\/p><p>Ovaj izra\u010dun pokazuje koli\u010dinu vode koju odvodni sustav mora mo\u0107i pouzdano odvoditi u sekundi kako bi se osigurala odvodnja u skladu sa standardima<\/p><p><strong>Kapacitet odvodnje krovnih slivnika<\/strong><\/p><p>Prema normi EN1253-2, proizvo\u0111a\u010di krovnih i parapetnih odvoda obvezni su prikazati vrijednosti odvodnje u tablici ili dijagramu ovisno o razini vode iznad brtvene prirubnice.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-658887e e-flex e-con-boxed e-con e-parent\" data-id=\"658887e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6d55517 elementor-widget elementor-widget-image\" data-id=\"6d55517\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"242\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb09_HR-1024x310.jpg\" class=\"attachment-large size-large wp-image-6816\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb09_HR-1024x310.jpg 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb09_HR-300x91.jpg 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb09_HR-768x233.jpg 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb09_HR-1536x465.jpg 1536w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb09_HR-2048x621.jpg 2048w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb09_HR-1920x582.jpg 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 9: Tablica kapaciteta odvodnje ispitanih prema EN 1253 to\u010dki 5.5.2.1 na 3 m odvodnoj cijevi (tj. zatvoreni sustav)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-84fed5c e-flex e-con-boxed e-con e-parent\" data-id=\"84fed5c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6e600b5 elementor-widget elementor-widget-spacer\" data-id=\"6e600b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-de62ccc elementor-widget elementor-widget-text-editor\" data-id=\"de62ccc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Kapacitet odvodnje ovisi o tome je li kori\u0161teni sustav otvorenog ili zatvorenog tipa. Stoga je va\u017eno pitati proizvo\u0111a\u010da prema kojim se kriterijima ispitivanja ispituju performanse doti\u010dnog proizvoda.<\/p><h3>Primjeri izra\u010duna<\/h3><p>Nakon \u0161to smo objasnili osnovna na\u010dela odvodnje krova, sada prelazimo na prakti\u010dnu primjenu: dimenzioniranje odvodnih sustava. Ovisno o vrsti sustava \u2013 otvoreni ili zatvoreni, pojedina\u010dni ili zbirni priklju\u010dak \u2013 pristupi izra\u010dunu se razlikuju.<\/p><p>Zatvoreni sustav sa zbirnim priklju\u010dnim cjevovodima odgovara principu negativnog tlaka. Budu\u0107i da ovo ovisi o sustavu i specifikacijama proizvo\u0111a\u010da, ne\u0107e se dalje raspravljati u ovom vodi\u010du.<\/p><p>U nastavku \u0107e se izra\u010dunati primjer krova s dva razli\u010dita sustava: jedan kao zatvoreni sustav s pojedina\u010dnim priklju\u010dnim cijevima i jedan kao otvoreni sustav sa zbirnim priklju\u010dnim cijevima.<\/p><p><strong>Po\u010detni podaci<br \/><\/strong>U naselju Fischamend u okrugu Bruck an der Leitha (Austrija) gradi se ravni folijski krov povr\u0161ine 800 m\u00b2 s jednosmjernim nagibom.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5d8eebe e-flex e-con-boxed e-con e-parent\" data-id=\"5d8eebe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3f34a74 elementor-widget elementor-widget-image\" data-id=\"3f34a74\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/elementor\/thumbs\/Abb10_Dachflache-mod-r64oipoz97m7ea9jkjsm1vbwdose8iq0659oolm0ao.jpg\" title=\"Abb10_Dachfl\u00e4che mod\" alt=\"Abbildung 10: Flachdach mit in einer Richtung ausgelegtem Gef\u00e4lle\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 10: Ravni krov s nagibom projektiranim u jednom smjeru<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bf32117 e-flex e-con-boxed e-con e-parent\" data-id=\"bf32117\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e22fe7a elementor-widget elementor-widget-spacer\" data-id=\"e22fe7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fc8929b elementor-widget elementor-widget-text-editor\" data-id=\"fc8929b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Bez obzira na odabrani sustav, povr\u0161ina krova <strong>A<\/strong>, prora\u010dunska koli\u010dina oborina <strong>r<\/strong>, koeficijent odvodnje <strong>C<\/strong> i koli\u010dina oborina <strong>Q<\/strong> sada se mogu odrediti iz ovih podataka:<\/p><p><strong>A<\/strong> = Povr\u0161ina krova 800 m\u00b2<\/p><p>Prora\u010dunska koli\u010dina oborina r u 5 minuta za petogodi\u0161nji ki\u0161ni doga\u0111aj preuzima se iz <a href=\"https:\/\/ehyd.gv.at\/\" target=\"_blank\" rel=\"noopener\">hidrografske online usluge<\/a> kako je gore opisano (vidi sliku 8) i pretvara se u litre u sekundi:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-92c601b e-flex e-con-boxed e-con e-parent\" data-id=\"92c601b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5b9085 elementor-widget elementor-widget-image\" data-id=\"a5b9085\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"436\" height=\"67\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_1_korr3.jpg\" class=\"attachment-large size-large wp-image-7319\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_1_korr3.jpg 436w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_1_korr3-300x46.jpg 300w\" sizes=\"(max-width: 436px) 100vw, 436px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-40d453c e-flex e-con-boxed e-con e-parent\" data-id=\"40d453c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-890a628 elementor-widget elementor-widget-text-editor\" data-id=\"890a628\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Koeficijent odvodnje <strong>C<\/strong> za folijske krovove je 1:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8d9e11a e-flex e-con-boxed e-con e-parent\" data-id=\"8d9e11a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9a0415c elementor-widget elementor-widget-image\" data-id=\"9a0415c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"48\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_2.png\" class=\"attachment-large size-large wp-image-6316\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-04918fe e-flex e-con-boxed e-con e-parent\" data-id=\"04918fe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3b2c4ae elementor-widget elementor-widget-text-editor\" data-id=\"3b2c4ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Otjecanje ki\u0161nice <strong>Q<\/strong> sada se izra\u010dunava iz <strong>Q = r * A * C<\/strong>:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1549b8a e-flex e-con-boxed e-con e-parent\" data-id=\"1549b8a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9c1d3b4 elementor-widget elementor-widget-image\" data-id=\"9c1d3b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"576\" height=\"114\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_3_korr.jpg\" class=\"attachment-large size-large wp-image-7016\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_3_korr.jpg 576w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Formel_3_korr-300x59.jpg 300w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fa390d5 e-flex e-con-boxed e-con e-parent\" data-id=\"fa390d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-35ab94d elementor-widget elementor-widget-text-editor\" data-id=\"35ab94d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Raspored za zatvoreni sustav (pojedina\u010dne cijevi)<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-38fd1f3 e-flex e-con-boxed e-con e-parent\" data-id=\"38fd1f3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a4599e6 elementor-widget elementor-widget-image\" data-id=\"a4599e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"531\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb11_Geschlossenes-System_korr.png\" class=\"attachment-large size-large wp-image-7352\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb11_Geschlossenes-System_korr.png 983w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb11_Geschlossenes-System_korr-300x199.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb11_Geschlossenes-System_korr-768x510.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 11: Shema zatvorenog sustava uklj. dimenzijske podatke<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-93fe6a5 e-flex e-con-boxed e-con e-parent\" data-id=\"93fe6a5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a0fa189 elementor-widget elementor-widget-spacer\" data-id=\"a0fa189\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c1993d3 elementor-widget elementor-widget-text-editor\" data-id=\"c1993d3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Nakon \u0161to su odre\u0111eni proizvod i potrebna dodatna oprema, vrijednosti kapaciteta odvodnje slivnika dobiveni od proizvo\u0111a\u010da koriste se za odabir odgovaraju\u0107ih komponenti.<\/p><p>Za ovaj primjer, potreban je protok od 32,0 l\/s. Zbog toga su odabrana tri krovna slivnika DN110 s kapacitetom od 10,7 l\/s svaki i visinom akumulacije vode od 35 mm (prema tablici odvoda proizvo\u0111a\u010da na slici 9).<\/p><p>Dimenzija krovnog slivnika odabire se prema normi EN 1253, pri \u010demu se za dimenzije DN75 i DN110 uzima u obzir vrijednost s razinom vode od 35 mm. Za dimenzije DN125 i DN160, me\u0111utim, koristi se vrijednost s visinom akumulacije od 45 mm.<\/p><p>Ukupni kapacitet triju krovnih slivnika DN110 iznosi 32,1 l\/s, \u0161to prema\u0161uje potrebnu vrijednost od 32,0 l\/s.<\/p><p>Svaki krovni odvod je pojedina\u010dno spojen na odvodnu cijev s kontinuiranom dimenzijom cijevi DN110.<\/p><p>Napomena: Potrebno je prilo\u017eiti shematski dijagram cjevovoda s odgovaraju\u0107im dimenzijama.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e851fcc e-flex e-con-boxed e-con e-parent\" data-id=\"e851fcc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-07f15cc elementor-widget elementor-widget-text-editor\" data-id=\"07f15cc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Raspored za otvorene sustave<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d49d420 e-flex e-con-boxed e-con e-parent\" data-id=\"d49d420\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-82cc874 elementor-widget elementor-widget-image\" data-id=\"82cc874\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"589\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb12_Offenes-System_korr-1024x754.png\" class=\"attachment-large size-large wp-image-7360\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb12_Offenes-System_korr-1024x754.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb12_Offenes-System_korr-300x221.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb12_Offenes-System_korr-768x565.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb12_Offenes-System_korr.png 1331w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 12: Shema otvorenog sustava uklj. dimenzijske podatke<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-49c33d1 e-flex e-con-boxed e-con e-parent\" data-id=\"49c33d1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3ffad41 elementor-widget elementor-widget-spacer\" data-id=\"3ffad41\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-757419f elementor-widget elementor-widget-text-editor\" data-id=\"757419f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Za otvorene sustave<\/strong>, specifikacije kapaciteta odvodnje dobivene od proizvo\u0111a\u010da krovnog odvoda nisu relevantne za projektiranje. Umjesto toga, moraju se koristiti <strong>tablice odvodnje<\/strong> prema <strong>EN 12056-3<\/strong> za horizontalne podzemne i sabirne cijevi (vidi sliku 13) te za vertikalne odvodne cijevi (vidi sliku 14).<\/p><p>Projektiranje zapo\u010dinje s potrebnim <strong>kapacitetom odvodnje od 32,0 l\/s<\/strong>. Dva su faktora klju\u010dna za odre\u0111ivanje potrebnog broja krovnih odvoda:<\/p><ul><li>Nagib horizontalne cijevi \u2013 obi\u010dno oko <strong>1,5%<\/strong><\/li><li>Promjer odvodne cijevi \u2013 ve\u0107i promjeri omogu\u0107uju ve\u0107e protoke<\/li><\/ul><p>\u00a0<\/p><p>Budu\u0107i da je nagib u ve\u0107ini slu\u010dajeva unaprijed odre\u0111en, broj odvoda i promjer cijevi ostaju varijabilni. Tablica prikazuje sljede\u0107e mogu\u0107nosti za na\u0161 primjer:<\/p><ul><li>Cijevi DN100 \u2192 7 odvoda (5,1 l\/s po odvodu)<\/li><li>Cijevi DN125 \u2192 4 odvoda (8,3 l\/s po odvodu)<\/li><li>Cijevi DN150 \u2192 2 odvoda (15,7 l\/s po odvodu)<\/li><\/ul><p>\u00a0<\/p><p>U praksi se varijanta s <strong>4 odvoda i cijevima DN125<\/strong> pokazuje posebno prakti\u010dnom. Me\u0111utim, <strong>kona\u010dna odluka je na projektantu<\/strong>, koji odabire optimalno rje\u0161enje ovisno o strukturnim uvjetima, geometriji krova i ekonomskim aspektima.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f961ec9 e-flex e-con-boxed e-con e-parent\" data-id=\"f961ec9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b082a4c elementor-widget elementor-widget-image\" data-id=\"b082a4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"635\" height=\"273\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_3_EN.png\" class=\"attachment-full size-full wp-image-6583\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_3_EN.png 635w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_3_EN-300x129.png 300w\" sizes=\"(max-width: 635px) 100vw, 635px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 13: Kapacitet odvodnje horizontalnih sabirnih i podzemnih cijevi (EN12056-3) <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-aeb47ac e-flex e-con-boxed e-con e-parent\" data-id=\"aeb47ac\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9a2df37 elementor-widget elementor-widget-spacer\" data-id=\"9a2df37\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe546ec elementor-widget elementor-widget-text-editor\" data-id=\"fe546ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Za dimenzioniranje vertikalne odvodne cijevi za oborinske vode mora se koristiti razina punjenja od 0,33 u skladu s EN 12056-3, osim ako nacionalni ili regionalni propisi ne propisuju druga\u010diju vrijednost (vidi sliku 14).\u00a0<\/p><p>Projektiranje po\u010dinje s krovnim odvodom koji je najudaljeniji od odvodne vertikale. Primjenjuje se sljede\u0107e:<\/p><p><strong>Pojedina\u010dne priklju\u010dne cijevi<\/strong> moraju uvijek zadr\u017eati prethodno odre\u0111eni promjer.<\/p><ul><li>Primjer: Ako je, kao \u0161to je gore opisano, odlu\u010deno koristiti \u010detiri odvoda s DN125, sve pojedina\u010dne priklju\u010dne cijevi tako\u0111er moraju biti DN125.<\/li><\/ul><p>\u00a0<\/p><p><strong>Horizontalne zbirne priklju\u010dne cijevi<\/strong> moraju primiti cijeli volumen vode priklju\u010denih krovnih odvoda.<\/p><ul><li>Kao rezultat toga, promjer cijevi se obi\u010dno pove\u0107ava u smjeru protoka.<\/li><li>Primjer (vidi sliku 12):<ul><li>Izme\u0111u prvog i drugog odvoda, zbirna priklju\u010dna cijev i dalje mo\u017ee biti projektirana kao DN125.<\/li><li>Priklju\u010denjem drugog odvoda potrebno je pove\u0107anje cijevi na DN150.<\/li><li>Priklju\u010denjem tre\u0107eg odvoda potrebno je pove\u0107anje cijevi na DN200.<\/li><\/ul><\/li><\/ul><p>\u00a0<\/p><p>Za dimenzioniranje <strong>vertikalne odvodne cijevi<\/strong> za oborinske vode mora se koristiti razina punjenja od 0,33 u skladu s EN 12056-3, osim ako nacionalni ili regionalni propisi ne propisuju druga\u010diju vrijednost (vidi sliku 14).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a768df5 e-flex e-con-boxed e-con e-parent\" data-id=\"a768df5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-49f2a4f elementor-widget elementor-widget-image\" data-id=\"49f2a4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"413\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_4_EN-1024x528.png\" class=\"attachment-large size-large wp-image-6591\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_4_EN-1024x528.png 1024w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_4_EN-300x155.png 300w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_4_EN-768x396.png 768w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Tabelle_4_EN.png 1080w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 14: Kapacitet odvodnje vertikalnih cijevi za oborinske vode (EN12056-3)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a915a3e e-flex e-con-boxed e-con e-parent\" data-id=\"a915a3e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-31486d3 elementor-widget elementor-widget-spacer\" data-id=\"31486d3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56631fc elementor-widget elementor-widget-text-editor\" data-id=\"56631fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>\u010cak i ako bi tablica iz EN 12056-3 (vidi sliku 14) ovdje dopustila manji promjer cijevi, promjer horizontalne sabirne cijevi ostaje odlu\u010duju\u0107i. To zna\u010di da odvodna vertikalna cijev mora imati barem promjer priklju\u010dene horizontalne sabirne cijevi. Nije dopu\u0161teno smanjenje promjera cijevi u smjeru protoka. Za na\u0161 primjer, to zna\u010di promjer cijevi od DN200 za odvodnu cijev.<\/p><p>Ovaj postupak osigurava da sustav ostane hidrauli\u010dki u\u010dinkovit i da se izbjegnu kvarovi.<br \/>Dimenzije cijevi pojedina\u010dnih dijelova prikazanih na dijagramu cjevovoda (slika 12) odre\u0111ene su pomo\u0107u slike 13 i slike 14.<\/p><p>Podzemne cijevi polo\u017eene pod zemljom ili ispod temeljne plo\u010de tako\u0111er moraju biti projektirane prema slici 13.<\/p><h2>Otvoreni ili zatvoreni sustav \u2013 koji treba koristiti?<\/h2><p>Koji \u0107e se sustav na kraju koristiti, mora odlu\u010diti projektant ili arhitekt za svaki slu\u010daj posebno, uzimaju\u0107i u obzir sljede\u0107e aspekte:<\/p><table><tbody><tr><td width=\"302\"><p><strong>Otvoreni sustav<\/strong> (zbirni cjevovod<\/p><\/td><td width=\"302\"><p><strong>Zatvoreni sustav<\/strong> (pojedina\u010dne cijevi)<\/p><\/td><\/tr><tr><td width=\"302\"><p><strong>Prednosti:<\/strong><\/p><ul><li>Manji tro\u0161kovi materijala i rada<\/li><li>Za polaganje podzemnih cijevi potrebno je manje gra\u0111evinskih radova jer postoji manje odvodnih cijevi<\/li><\/ul><p>\u00a0<\/p><p><strong>Nedostaci:<\/strong><\/p><ul><li>Manji kapacitet odvodnje u usporedbi sa zatvorenim sustavom<\/li><li>Dimenzioniranje se mo\u017ee provesti samo prema tablicama 7 i 8 u skladu s normom EN12056-3<\/li><\/ul><\/td><td width=\"302\"><p><strong>Prednosti:<\/strong><\/p><ul><li>U usporedbi s otvorenim sustavom posti\u017ee se znatno ve\u0107i kapacitet odvodnje.<\/li><li>Dimenzioniranje i raspored odvodne cijevi jednostavni su i temelje se isklju\u010divo na vrijednostima odvodnje krovnih slivnika.<\/li><li>Op\u0107enito ve\u0107a operativna pouzdanost pri odvodnji ki\u0161nice s krova, jer je svaki krovni odvod pojedina\u010dno spojen na odvodnu cijev i ako je jedna cijev za\u010depljena, sve ostale su i dalje u funkciji<\/li><\/ul><p>\u00a0<\/p><p><strong>Nedostaci:<\/strong><\/p><ul><li>Vi\u0161i tro\u0161kovi materijala i rada<\/li><li>Ve\u0107i broj odvodnih cijevi zahtijeva vi\u0161e gra\u0111evinskih radova za polaganje podzemnih cijevi<\/li><\/ul><\/td><\/tr><\/tbody><\/table><h2>Zaklju\u010dak<\/h2><p>Projektiranje i dimenzioniranje sustava odvodnje krova zahtijeva pa\u017eljivu pripremu. To uklju\u010duje pravovremeno prikupljanje svih potrebnih informacija, \u0161to ponekad mo\u017ee oduzimati puno vremena.<\/p><p>U\u010dinkovitu odvodnju oborinskih voda uvijek treba smatrati cjelokupnim konceptom &#8211; od odvodnje vode s krovova i povr\u0161ina posjeda do njezina ispu\u0161tanja u javnu kanalizaciju ili infiltracije na posjedu. Ograni\u010denja koja name\u0107u vlasti kako bi se rasteretio kanalizacijski sustav tijekom obilnih ki\u0161a zahtijevaju dodatne mjere poput zadr\u017eavanja ili infiltracije te predstavljaju dodatne izazove za projektante.<\/p><p>Jo\u0161 jedna bitna komponenta sigurne odvodnje oborinskih voda je odvodnja u hitnim slu\u010dajevima, koja osigurava da ne do\u0111e do o\u0161te\u0107enja zgrade \u010dak ni u slu\u010daju iznimno jakih ki\u0161a (pljuskovi koji se javljaju jednom u stolje\u0107u). Vi\u0161e informacija o sigurnosnoj odvodnji mo\u017eete prona\u0107i <a href=\"http:\/\/www.hl.at\/upload_cms\/%7B540b4e4e-4045-e0ea-bcec-89a609571fe8%7DNotentw%C3%A4sserung_Pro_HR_Web.pdf\" target=\"_blank\" rel=\"noopener\">ovdje<\/a>.\u00a0<\/p><p><strong>Specifikacija krovnog odvoda koja odgovara konstrukciji krova<br \/><\/strong>Za to\u010dnu specifikaciju sustava odvodnje krova, HL tim za podr\u0161ku rado \u0107e vam pomo\u0107i na <a href=\"mailto:support@hl.at\" target=\"_blank\" rel=\"noopener\">support@hl.at<\/a> ili kontaktiranjem va\u0161eg <a href=\"https:\/\/www.hutterer-lechner.com\/hr\/contacts.aspx\" target=\"_blank\" rel=\"noopener\">regionalnog HL prodajnog predstavnika<\/a>. Sve \u0161to trebate u\u010diniti je zatra\u017eiti crte\u017e presjeka s opisima pojedina\u010dnih dijelova od arhitekta ili projektanta i poslati ga HL timu. U kratkom vremenu primit \u0107ete 3D prikaz kao i detalje u raznim formatima, uz to\u010dnu specifikaciju redoslijeda elemenata slivnika:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9cc05a6 e-flex e-con-boxed e-con e-parent\" data-id=\"9cc05a6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b739f51 elementor-widget elementor-widget-spacer\" data-id=\"b739f51\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1b16e56 e-grid e-con-boxed e-con e-parent\" data-id=\"1b16e56\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c0e916a elementor-widget elementor-widget-image\" data-id=\"c0e916a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"587\" height=\"476\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb13.png\" class=\"attachment-large size-large wp-image-6551\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb13.png 587w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb13-300x243.png 300w\" sizes=\"(max-width: 587px) 100vw, 587px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a56384e elementor-widget elementor-widget-image\" data-id=\"a56384e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"714\" height=\"504\" src=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb14.png\" class=\"attachment-large size-large wp-image-6559\" alt=\"\" srcset=\"https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb14.png 714w, https:\/\/www.siphoniker.at\/wp-content\/uploads\/2025\/05\/Abb14-300x212.png 300w\" sizes=\"(max-width: 714px) 100vw, 714px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bf96dcc e-flex e-con-boxed e-con e-parent\" data-id=\"bf96dcc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7bd09d4 elementor-widget elementor-widget-text-editor\" data-id=\"7bd09d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Relevantni standardi:<\/h3><p><strong>Za odvodnju krovova, balkona i terasa primjenjuju se sljede\u0107i standardi:<\/strong><\/p><ul><li>EN1253-2 &#8211; Odvodi za zgrade &#8211; 2. dio: Krovni i podni slivnici bez sifona<\/li><li>EN 12056-3 &#8211; Sustavi gravitacijske odvodnje unutar zgrada &#8211; 3. dio: Odvodnja krova, projektiranje i dimenzioniranje<\/li><li>\u00d6NORM B2501 &#8211; Sustavi odvodnje za zgrade i nekretnine &#8211; Projektiranje, izvedba i ispitivanje &#8211; Dodatne odredbe za \u00d6NORM EN 12056<\/li><\/ul><p>\u00a0<\/p><p><strong>Izvori:<\/strong><\/p><ul><li><a href=\"https:\/\/www.austrian-standards.at\/de\/shop\/din-en-1253-1-2015-03~p2123330\">https:\/\/www.austrian-standards.at\/de\/shop\/din-en-1253-1-2015-03~p2123330<\/a><\/li><li><a href=\"https:\/\/www.austrian-standards.at\/de\/shop\/onorm-en-12056-1-2000-12-01~p1339394\">https:\/\/www.austrian-standards.at\/de\/shop\/onorm-en-12056-1-2000-12-01~p1339394<\/a><\/li><li><a href=\"https:\/\/www.austrian-standards.at\/de\/shop\/onorm-b-2501-2025-02-01~p4021532\">https:\/\/www.austrian-standards.at\/de\/shop\/onorm-b-2501-2025-02-01~p4021532<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Ovaj vodi\u010d pru\u017ea sveobuhvatan uvod u tehni\u010dke zahtjeve i izra\u010dune za dimenzioniranje sustava odvodnje za krovove, balkone i terase. Razmatraju se razli\u010dita rje\u0161enja odvodnje i njihove specifi\u010dne prednosti i nedostaci kako bi se osiguralo pouzdano i standardno uskla\u0111eno projektiranje. Cilj je sprije\u010diti o\u0161te\u0107enja od vlage i poplave u\u010dinkovitim rje\u0161enjima odvodnje te osigurati dugoro\u010dnu funkcionalnost i sigurnost zgrade.<\/p>\n","protected":false},"author":10,"featured_media":7084,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[226],"tags":[488,487,486,489],"class_list":["post-6607","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-krov-terasa","tag-balkon-hr","tag-dach-hr","tag-entwaesserung-hr","tag-terrasse-hr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Smjernice za dimenzioniranje odvodnje s krovova, balkona i terasa - Siphoniker-Blog, HL Hutterer &amp; Lechner GmbH in Himberg<\/title>\n<meta name=\"description\" content=\"Ovaj vodi\u010d pru\u017ea sveobuhvatan uvod u tehni\u010dke zahtjeve i izra\u010dune za dimenzioniranje sustava odvodnje za krovove, balkone i terase. Razmatraju se razli\u010dita rje\u0161enja odvodnje i njihove specifi\u010dne prednosti i nedostaci kako bi se osiguralo pouzdano i standardno uskla\u0111eno projektiranje. 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