Roof Drainage Design Guide

Hr wallingford ltd howbery park wallingford oxon ox10 8ba. The distinguishing feature of a siphonic roof drain is the air baffle.

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Consult with the building architect on how much of an effect this will have.

Roof drainage design guide. Roof drainage design guide introduction the theoretical drainage capacities for steeline roofing sheets have been presented in this design guide. Guide to flat roof drainage systems for disposing of roof runoff. The flow capacities and maximum roof lengths for all the profiles except.

The roof slope and the lower the building height the greater the cost reduction from minimising roof slope. First off the roof drainage design guide is an extremely basic direct and utilitarian design every single current trademark. This air baffle is engineered and tested to prevent air from entering the piping system at peak flows.

Lysaght rainwater solutions nsw guide pdf 2 8 mb. Manual for the design of roof drainage systems a guide to the use of european standard bs en 12056 3 2000 r w p may report sr 620 march 2003 address and registered office. The roof drainage design guide can go up against different style that when nitty gritty right can ooze a cutting edge feel.

Other than the baffle a siphonic roof drain has the same features as a traditional roof drain including a. Last updated 27 feb 2019. I examined several roof drainage calculators and tables to see what they tell us.

You can view information on the design of roof drainage systems in the brochure for your state. While sound comprehensive design and good materials will provide owners with trouble free roof installation for many years one certain means by which periods between repair and replacement can be importantly extended is through provision of more effective roof drainage systems. The above sizing data is offered as a guide only.

The result is the number of drains needed. To design a sloped or flat roof drainage system we need to know the anticipated maximum rainfall rate and the flat or projected roof area. Calculate drains needed.

Lysaght rainwater solutions qld guide pdf 2 2 mb. This table is based on zurn s roof drain vertical requirement for horizontal roof areas at various rainfall rates table. As stress is added to a roof the roof itself will bow and bend creating low spots than can affect water flow.

These savings are in the wall structure and wall cladding. It should be realised however that increasing the roof slope sufficiently could reduce wind pressures and lower the roof structure cost. This document provides designers with information for estimating water flow over steeline roofing sheets and through downpipes.

Main features roof drainage design guide. Following are some basic design guidelines to consider as part of your project courtesy of jay. A siphonic roof drain looks much like a traditional roof drain.

Take the roof s total square footage and divide by the total square footage handled by one drain. General roof drain system guidelines. Last updated 26 aug 2016.

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