Rebar provides concrete with significantly more strength than it otherwise has, especially in the area of tensile strength, which makes it necessary for concrete used in infrastructure subject to heavy loads and stress. ... More »

Rebar estimating refers to the process of determining the approximate quantity and size of rebars, welded wire mesh and construction accessories that are needed for building a reinforced concrete structure. This informat... More »

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Rebar sizes range from #3 to #18 and are equal to the number of 1/8 inches in the diameter of the bar. A #3 rebar is 0.375 inches in diameter and weighs 0.376 pounds per foot. A #18 rebar is 2.257 inches in diameter and ... More »

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A footing for a poured concrete retaining wall is constructed by digging out a flat area on the ground, adding concrete forms to contain the material, placing rebar at appropriate places and finally mixing concrete befor... More »

Figure out the amount of concrete to use by calculating the volume of the desired concrete slab and the footings supporting the slab, then converting this area to cubic yards. The method for calculating the volume of con... More »

Concrete grades are determined by concrete's compressive strength 28 days after it has been poured. The strength is measured in psi, or pounds per square inch. More »

Concrete cube testing is the process by which a batch of concrete is tested for strength and durability. This is done by making a cube of concrete in a machine designed to make concrete blocks, curing the concrete and re... More »