the difference between a political and a physical boundary is that a physical map shows geographical features like mountains and rivers while a political map shows boundaries.
Standard Weight. Standard asphalt shingles generally weigh about 190 pounds per 100 square feet, based on information from U.S. Inspect, a property inspection company. The weight of asphalt is especially important if you want to install a new layer of asphalt roofing over an existing layer.A roof measuring 1,600 square feet that has two layers of standard asphalt shingles on it is holding about 6,000 pounds of shingles..S. Inspect indicates that dimensional shingles can be 50 percent heavier than standard asphalt roofing. Therefore, they could weigh about 285 pounds per 100 square feet. Heavier shingles reduce the chance the underlayment will wrinkle, according to the National Roofing Contractors Association.
Multiply 27 by 145, which is the weight of asphalt in pounds per cubic foot given by the NAPA. Twenty-seven multiplied by 145 equals 3,915, so asphalt weighs 3,915 pounds per cubic yard.Multiply that number by the amount of entire cubic yards to calculate the total weight. For example, if the volume encompasses 50 cubic yards, the total weight of the asphalt is 195,750 pounds.ultiply 27 by 145, which is the weight of asphalt in pounds per cubic foot given by the NAPA. Twenty-seven multiplied by 145 equals 3,915, so asphalt weighs 3,915 pounds per cubic yard.