The light is refracted. Which means the angle of incidence and the angle of reflection are different.

Depends on the size of the paver!! Here are some common sizes along with pavers per SQ ft.
For 4" x 8" pavers - 4.5 pavers per sq. Ft.
For 3 5/8" x 7 5/8" pavers - 5.2 pavers per sq. Ft.
For 3 3/4" x 7 1/2" pavers - 5.1 pavers per sq. Ft. … Read more

The National Building code and ADA(American Disability Association) specifies a standard 1:12 slope design (4.67 degree angle) on all permanently installed wheelchair ramps. What this means is, for every inch of rise from the beginning of the ramp to the end of the ramp there must be at least 12" of ramp. So for a … Read more

Depends on how thick it is, think of your slab as a cube... We need to find how many cubic ft. Are in your slab because concrete is sold by the yard. 1 yard of concrete = 27 cubic feet..
L x W x H is the formula to calculate the volume of any cube..You … Read more

You need to determin how many qubic feet you have, not square feet. Here is how you do it..
Step1
measure the overall dimensions of your patio or concrete form. First take the width and then the length measurement. Next you will have to measure the depth of the form. Patios are generally about 4 … Read more