Green Roof Dead Load

On the pages below we show a summary of our product range. We can provide more information on individual products or systems on request. The long term performance of green roofs depends on many factors.

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Green Roof Design Guidance

The venny green roof has shallow substrates on two types of roof the first roof is on shipping containers and is designed for a dead load of 250kg m 2 and live load of 100kg m 2.

Green roof dead load.

Soil does not necessarily occupy the full depth of the assembly. Green roof shall provide suitable drainage and water retention capacity to support healthy vegetation cover according to specified vegetation performance. The second most common conservative assumption found in the industry is to assume that the green roof is a soil load rather than a dead load. Arch 331 note set 13 1 s2014abn 2.

Astm e2397 is the established standard procedure for determining the dead and live loads associated with green roof systems. Green roofs typically use lightweight engineered soils with very light drainage and insulation layers. D dead load l live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load t effect of material temperature h hydraulic loads from soil f hydraulic loads from fluids. The use of reliable and established products that comply with green roofing guidelines is important.

The entire green roof assembly including plants and the water required to saturate the growth media is considered part of the dead load of the structure. The dead load of a green roof assembly should be determined on a project specific basis because growth medium composition varies from job to job. Roof shall balance drainage and water retention to meet drainage requirements but retain as much rain as possible while still meeting drainage and maximum wet weight dead load requirements. The second trussed roof is designed for a dead load of 160kg m 2 and a live load of 40kg m 2.

Water in excess of that which saturates the growth media snow and people visiting the green roof are all considered part of the live load of the structure. The dead load on a roof is the weight of the roof structure itself along with any permanently attached materials or structures on the roof so it must be designed first of all to support itself.