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Specifications for retaining walls include materials of construction and dimensions. With concrete block walls, block shape and block texture are also important considerations. Compressive strength, ...

A completed wall would send a strong message that people wanting to come to the U.S. must make a legal application--and wait ...

The usual size of bricks in common use is length 215 mm, width 102 5 mm and height 65 mm and like blocks they must be laid in a definite pattern or bond if they are to form a structural wall. Bricks ...