1. Heavy load machine welded 2. ISO9001:2008 3. 30/100 mesh size ... treadSpecificationsAdvantages of steel grid plank: light weight, strong intensity, big load capacity, transmission and aeration, anti-skidSteel product standard: China YB ... ) Advantages of steel grid planks: light weight, strong intensity, big load capacity,transmission and aeration, anti-skid and secure, wears well ...