Green Roof Live Loads

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.

Green roof live loads.

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. Where snow isn t a problem the live load can come from people working on the roof and any equipment they. Lastly strategies utilizing green roofs within the context of the. Arch 331 note set 13 1 s2014abn 2.

Saturated with water the weight can increase by as much as 35 to around 100 to 110 pounds per cubic foot. What is the impact of green roof weight on building structure. 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. Structural loads weight of green rooftops.

The live load on a roof is the weight of any temporary objects on the roof. Live loads seismic loads wind effects load combinations serviceability concerns and astm standards is provided. In older buildings or new build this may require costly structural reinforcement which in some cases may prove prohibitively expensive. An analysis of tree loading sloped roofs seismic anchorage of green roofs and recommended structural design specifications and strategies will also be presented.

However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. Astm e2397 is the established standard procedure for determining the dead and live loads associated with green roof systems. The second trussed roof is designed for a dead load of 160kg m 2 and a live load of 40kg m 2. One cubic foot of dry agricultural dirt or loam typically used for a green roof weighs between 75 and 81 pounds.

2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes.