... construction in the form of reinforcement brick mesh, welded bar gratings or wire mesh sandwich construction. A wire mesh sandwich construction which comprises an array ... .8mm x 50.8mm12,13,14,15,162" x 3"50mm x 75mm14,13,163" x 3"75mm x 75mm12,13 ... ,14,15,162" x 4"50mm x 100mm13,144" x 4"100mm x 100mm13,14