Green Roof Concrete Slab Thickness

Use tables in chapter 7 of the crsi design handbook.

Green roof concrete slab thickness.

Woodwool cement slabs should conform to bs en 13168 and be a minimum thickness of 50mm. A one way concrete slab system with beams and girders. The nominal thickness of a green roof is the approximate total height of the soil and drainage components that constitute the green roof system excluding the roof structure insulation waterproofing and plants it is common practice to use the term extensive to describe green roofs that are very thin and will only support hardy drought resistant vegetation. Download a range of our brochures to help support you in designing flat roofs green and blue roofs and photovoltaic solutions for your flat.

Green roofs allow energy saving due to a reduction in summer air condi tioning of 25 let alone the fact that the heat resistance of green roofs is higher and benefits are also gained in terms of winter heating in germany more than 10 of roofs are green roofs. Green roof design background goals. Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.

A solid slab of concrete capping the top of your house. Exact specifications vary but most concrete roofs are several inches thick. In the city of chicago alone a weston design consultant study estimates the. Insulated panel with a membrane top sheet.

Determine minimum allowable slab thickness based on l 28. Determine slab thickness and ρ value based on minimum slab thickness clear span and factored loading. If reinforced concrete were to be reused strong connections would have to be made between roof and walls. A concrete roof is exactly what it sounds like.

The course will be launched at the fifth annual international greening rooftops for sustainable communities conference april 29 may 1 2007 in minneapolis. Reinforced concrete slabs are heavier and generate higher seismic forces in an event. Flat roofing solutions bauder flat roofs. Plywood used for roof decks is generally 18mm thick but it is possible to specify a minimum 15 mm if the supporting structure is more closely spaced.