Siphonic Roof Drainage System Design

Many large industrial commercial and retail buildings are now fitted with siphonic drainage which has clear advantages over gravity drainage.

Siphonic roof drainage system design.

To research set standards and disseminate best practice in uk siphonic drainage from design to installation. Gutter design for siphonic roof drainage systems. The siphonic roof drainage system is based on the ingenious gravity induced vacuum principle allowing a quick and efficient way of draining roofs comprising various shapes and gradients. Siphonic roof drainage systems must be sized with a hydraulic calculation by a validated program state law requires that this calculation must be performed by a licensed engineer.

The construction industry plays an essential role in australia s economy. A professional support package is provided to clients based on sound engineering principles. By contrast a fully engineered siphonic roof drainage system contains an anti vortex plate that acts as a baffle and prevents air and debris from entering the piping system at full flow allowing the pipes to completely fill up with water. With a flat level design long horizontal runs above overhead ceilings are pos sible as shown in illustration 4.

Contact roofing consultants today using our contact form for a quote. Either the contractors or the designers. In a growing market siphonic roof drainage systems are transforming from a niche product to the default system for buildings with large roof areas. With pipes as little half the size of conventional roof drainage sysems siphonic systems can reduce roof drainage costs by as much as 50 space savings siphonic roof drainage systems have no slope and so can greatly ease coordination in design and in the field.

Siphonic roof drainage is not so much a system in terms of a pre engineered product or package. Siphonic drainage was first introduced in the 1960 s in scandinavia and since then has been used widely across europe including the uk in the far east australasia south africa and the usa. Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm. The water is sucked or siphoned from the roof down into the drain at high velocity.

Aco siphonic drainage traffic free roof areas which are no larger than 150 m2 such as production buildings hangars or sports stadiums are suitable applications for siphonic drainage. When the rainfall is heavy enough the gullies create reduced pressure in the pipe system. It is instead a technique of no pitch pipe design used to achieve desired flow from roof drains to point s of discharge.