SS-EN-12056-3 Gravity drainage systems inside buildings - Part 3: Roof drainage, layout and calculation


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This European Standard applies to wastewater drainage systems, which operate under gravity. It is applicable for drainage systems inside dwellings and commercial, institutional and industrial buildings. This third part of this European Standard describes a method of calculating the hydraulic adequacy of non-siphonic roof drainage systems and gives performance requirements for siphonic roof drainage systems. It also sets standards for the layout and installation of roof drainage insofar as they affect flow capacity. This part of this European Standard applies to all roof drainage systems where the outlets are large enough not to limit the flow capacity of the gutter (i.e. free discharge conditions). It applies to all materials used for roof drainage systems. Detailed information additional to that contained in this Standard may be obtained by referring to the technical documents listed in Annex B.

To find similar documents by classification:

01.040.91 (Construction materials and building (Vocabularies))

91.060.20 (Roofs Including related elements (gutters, etc.))

91.140.80 (Drainage systems Sewage water disposal and treatment, see 13.060.30 Drainage systems for rainwater, see 91.060.20 External sewage systems, see 93.030)

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Designation Name

SS-EN 12056-3

Revision Level




Publication Date

Dec. 22, 2000



Page Count


International Equivalent

EN 12056-3:2000 IDT