Live Roof Weight

Roofstone follows the roof contour and can be used to create walkways patios and landing areas on most non ada compliant roofs.

Live roof weight.

Practically speaking soil acts as a sponge. Western states metal roofing. L live load symbol l r live roof load symbol lrfd load and resistance factor design r rainwater load or ice water load. Steel roof deck 22 gauge corrugated.

Each inch of water weighs approximately 5 2 pounds per square foot so at maximum water detention the blue roof solution would add up to 18 2 pounds per square foot of load to the weight of the green roof modules find saturated weights here. Tpo roof membrane 60 mil fully adhered membrane only 0 29 lbs. This is all of the natural stresses imposed upon a roof such as snow loads rain loads and wind loads. The weight of truss rafter must be added to calculate the dead load of the roof.

This is because soil holds water by cohesion but there is a limit to how much cohesive force soil can provide. 40 50 pounds per square foot depending upon soil and plants but the weight is not so heavy as to greatly drive up the cost of the supporting structure. If you live in the us our snow load calculator compares the total weight on your roof with the permissible load calculated according to the standards issued by the american society of civil engineers regarding the minimum design loads for buildings and other structures asce7 16. Calculate the live load of the roof.

All roofs must slope in order to drain and what most people refer to as a flat roof will have a slope of per 12. One can literally create a prairie or shade garden on the roof. Such roofs will retain more water than roofs with greater slope. The live load on a roof is the weight of any temporary objects on the roof.

This is determined by adding the weights of any individuals who may work on the roof and the combined weight of all tools and equipment used by those workers. W wind load symbol force due to a weight name for total force due to distributed load j density or unit weight design codes in general design codes are issued by a professional organization interested in. 1 lb m ft 2 4 88 kg m 2. Step 3 determine the transient load of the roof.

With 6 inch soil depth it becomes possible to support a broad array of non succulent plants. This is inch per 1 foot which is the norm minimum roof slope for drainage. Naturally the weight is greater appx. Roofstone can also be used on roofs that must be ada compliant with slope up to 1 48 which equals 2 08 or 1 19 degrees.