Placing 5 bars of correct reinforcement at a distance of 4 inches offers a steel surface of 0.93 inches, while positioning the same wrong bars at a distance of 5 inches has reduced the steel surface provided to just 0.74 inches.

An unreinforced concrete wall of 4 inches thick shall not be constructed more than 6 feet, 8 inches unless it is supported sideways horizontally or vertically every 6 feet, 8 inches.

The standard wall blocks are 8 to 8 on 16 inches, with two flat sides, two vertical hollow nuclei and carved ends. When measured, the length of the block is slightly less than 16 inches to allow a 38-inch mortar joint.

The blocks are available in a standard size of 440 x 215 mm and in 140 mm thick and 215 mm thick in a standard finish (adapted to reproduction).They are used mainly in places that require construction with a wall of reinforced concrete and in agricultural buildings.

Multiplying the total wall surface of 1.125 to obtain the approximate number of blocks will be necessary to build the walls of the garage. Multiplying 700 square feet of wall surface of 1.125 is 788, which means that you will need about 788 concrete blocks to build the walls of the garage.