Pounds per square foot lb ft 2 pounds per square 100 sq.
Roof weight per square foot.
These are the weights of typical actual products.
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.
Steel shingles 80 pounds.
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.
Steel standing seam 120 150 pounds.
It is often compared to slope but is not exactly the same.
The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot.
Weight of roofing materials.
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.
Per square foot a 4 12 lbs.
While most people think about metal roofing is heavier compared to other materials.
A clay tiled roof may have a dead load.
Outside of the u s a degree angle is typically used.
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Normally b decking is used in short to medium span conditions ranging from 3 feet to 10 feet in distance.
Here is a list of sample roofing material weights per 100 square feet.
B deck is strong light weight economical and easy to install and is the most common structural roof deck.
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.
You can also find the load per square meter or square foot of roofing by opening the advanced mode.
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.
A 12 inches metal roofing panel weighs for about 10 lbs.
The weight of truss rafter must be added to calculate the dead load of the roof.
Snow load thickness density the result snow load or the pressure exerted by the snow has the units of kn m or lbs ft.
Aluminum standing seam 70 pounds.
Aluminum shingles 45 pounds.
B deck is 1 1 2 deep and is available in galvanized and prime painted finishes.
Asphalt shingles 3 tab or strip 1 95 lbs.
The load increases with the use of heavier roofing material.
If you want to calculate these values by hand use the following formulas.
1 lbm ft2 4 88 kg m2 note.
Ft kilograms per square meter kg m 2 source.
The weights of other actual products of the same type may vary.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
