... plank: light weight, strong intensity, big load capacity, transmission and aeration, antiskid 1. Steel product standard: China YB/700-882 ... pitch may be 30, 38, 50, 76 and 100mm, of which 50 and 100mm are recommended 3) Advantages of steel gird ... strong intensity, big load capacity, transmission and aeration, antiskid and secure, wear well, non-dropsy, non-dirt, and easy to install 4) Hot galvanizing ...