Flat roof asphalt finish.
Flat roof dead load calculator.
Calculating the load on a flat roof is a challenging task for the layperson that involves knowledge of building materials their weights and local building codes.
Steel beam calculator ltd was set up in 2011 to enable building industry professionals to design safe and effective steel beams more quickly and affordably.
You need to supply the following information.
Location 2uniform load psf kn m roofs ordinary flat pitched and curved roofs roofs used for roof gardens roofs used for assembly occupancies.
To calculate the weight of snow on a roof use the first two sections of our snow load calculator.
V t a.
For roofs that are flat and with ground snow loads lower than 20 pounds per square foot the roof snow load is equal to 70 of the product of the exposure thermal and importance factors and the ground snow load.
You can enter these values in any units you d like including meters and feet.
The values for dead loads in table 3 2 are for commonly used materials and constructions in light frame residential buildings.
Step 4 determine the flat roof snow load.
Flat roof joist calculator.
Account that the volume is a thickness times an area.
The following table provides typical weights dead load self weight for various roofing materials where possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products.
Length and width of your roof.
Standard loads of materials.
For ground snow loads greater than 20 pounds per square foot the roof load is equal to.
D dead load symbol.
Dead load psf span calculator for wood joists and rafters available for the iphone.
The standard guide in the u s the asce 7 05 lists weights and stresses for all building materials expressed in pounds per square foot.
3 3 dead loads dead loads consist of the permanent construction material loads comprising the roof floor wall and foundation systems including claddings finishes and fixed equipment.
So the calculation becomes.
If your roof is pitched enter the length and width of the flat area covered by the roof.
1 enter joist details 1 1 span and joist spacing.
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.
Flat roof with asphalt finish with felt boarding insulation.
