Green Roof Imposed Load

Roofs are under a lot of pressure.

Green roof imposed load.

For example an existing roof may be designed for public occupancy 100 pounds per square foot. Flat roofing solutions bauder flat roofs. 2 2 3 2 where a roof is to be provided with greenery the weight of soil waterproofing and drainage system and plants for greenery shall be taken. Green roofs typically use lightweight engineered soils with very light drainage and insulation layers.

On roofs particularly for category h roofs imposed loads need not be applied in combination with either snow loads and or wind actions. Roofs used for roof gardens or assembly purposes. 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. Imposed loads may be redistributed at the architect and engineer s discretion.

When the imposed load is considered as an accompanying action in accordance with en 1990 only one of the two factors ψ en 1990 table a1 1 and αn 6 3 1 2 11 shall be applied. Some roofs are finished with substantial. Soil does not necessarily occupy the full depth of the assembly. For dynamic loads caused by machinery see en 1991 3.

One option would be to restrict access and to reallocate a portion of the design live load to the green roof. Imposed loads for design of building building works street and street works. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. The minimum floor live loads shall be the greatest actual imposed loads resulting from the intended use or occupancy of the floor and shall not be less than the uniformly distributed load patterns specified in sec 2 3 4.

Load limits on the roof of a building. Photo by andrew wutke. The second trussed roof is designed for a dead load of 160kg m 2 and a live load of 40kg m 2.