Glen-Gery molded paving brick are manufactured to conform to the ASTM International Standard Specification C 902, Class SX.
Glen-Gery molded paving brick are manufactured to achieve dimensional tolerances. The dimensional tolerances of the product are intended to be within the requirements of ASTM International C 902, Application PS. The tolerances for various unit dimensions are typically: 3" and under, +/-1/8"; over 3" to 4", +/-3/16"; over 5" to 8", +/-1/4". Generally, the product ordered will contain a few units which are over or under the specified dimension.
Glen-Gery molded paving brick are manufactured using sand as a lubricant to release the clay from the molds. The brick are called 'sandstruck' and have sand on all sides except one bedding surface.