Roof Weight Per Square Foot

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

Roof weight per square foot.

Pounds per square foot lb ft 2 pounds per square 100 sq. In fact with many heavy roofs fire fighters will not go inside the home to fight the fire if it has avery heavy roof on top. Verco hsb 36 stands for high shear b deck 36 wide. The weights of other actual products of the same type may vary.

If you find this website valuable and appreciate it is open and free for everybody please contribute by. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. The load increases with the use of heavier roofing material. The weight of truss rafter must be added to calculate the dead load of the roof.

Roofing asphalt shingles 2 5psf wood shakes 3 0psf roll roofing 1 0psf asphalt shingles approx 1 4 2 0psf cement asbestos shingles 3 8 4 0psf clay tile add 10psf for mortar 9 0psf ludowici 10 0psf roman 12 0psf slate 1 4 10 0psf spanish 19 0psf wood 1 3 0psf cement tile add 6psf for mortar 10 0psf. Weight of roofing materials. 1 lbm ft2 4 88 kg m2 note. Here is a list of sample roofing material weights per 100 square feet.

Snow load thickness density the result snow load or the pressure exerted by the snow has the units of kn m or lbs ft. These are the weights of typical actual products. Outside of the u s a degree angle is typically used. A clay tiled roof may have a dead load.

Generally three bundles of shingles are enough to cover 1 square of roof 100 square feet which can weigh anywhere from 180 to 240 pounds. A single 26 gauge panel weighs only 0 88 lbs. It is often compared to slope but is not exactly the same. You can also find the load per square meter or square foot of roofing by opening the advanced mode.

While most people think about metal roofing is heavier compared to other materials. Normally b decking is used in short to medium span conditions ranging from 3 feet to 10 feet in distance. A low weight roof also lessens the risk of a roof collapse if there is a fire inside of the home which reaches the attic. Sorry to see that you are blocking ads on the engineering toolbox.

B deck is strong light weight economical and easy to install and is the most common structural roof deck. Per square foot a 4 12 lbs. Asphalt shingles 3 tab or strip 1 95 lbs. B deck is 1 1 2 deep and is available in galvanized and prime painted finishes.

Aluminum standing seam 70 pounds. The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. A bundle of three tab asphalt shingles weighs between 60 and 80 pounds but this may vary depending on the quality and type of shingle. If you want to calculate these values by hand use the following formulas.

Yet if you do the math and compare asphalt shingles over metal roofing asphalt can weigh 5 lbs. Aluminum shingles 45 pounds. Steel shingles 80 pounds.