Green Roof Concrete Slab Thickness

Determine minimum allowable slab thickness based on l 28.

Green roof concrete slab thickness.

It is recommended that minimum 90 mil 2 3 mm thick reinforced butyl rubber membranes be used for green roof assemblies. Some green roofs in europe have lasted more than 40 years without being replaced. With that in mind i ve seen slabs as thick as 16 18 due to column spacing. Use tables in chapter 7 of the crsi design handbook.

Roof slab forms the top cover for main vessel which is filled with concrete for the purpose of nuclear radiation shielding. Determine slab thickness and ρ value based on minimum slab thickness clear span and factored loading. 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. A solid slab of concrete capping the top of your house.

A one way concrete slab system with beams and girders. Commercial is typically steel w a composite deck so you ll have a 5 6 slab sitting on top of steel beams. A green roof protects the waterproofing membrane from damaging uv rays freeze thaw cycling and repeated foot traffic extending its lifespan. Intensive green roofs have a higher weight and require a minimum soil thickness of at least 30 cm compared to the 5 12 cm of the latter.

Exact specifications vary but most concrete roofs are several inches thick. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. A concrete roof is exactly what it sounds like. Advances of computational fluid dynamics in nuclear reactor design and safety assessment 2019.

Sheets normally are 60 mils 90 mils or 120 mils 1 5 mm 2 3 mm or 3 0 mm thick. Flat roofing solutions bauder flat roofs. For roof gardens an extra load of 400 750 kg m2on the structure of the building must be accounted for compared to the 60 250 kg m2 of the extensive green roof. Leed and green globes.