... -1025 open style floor boards / steel plate, YX75-230-690 type floor boards, YX75-200-600 ( galvanized steel sheeting), YX75-293 ... -344-688 (commonly steel plate), YX75-230-690 type floor boards, YX76-305-915 type floor boards, floor boards 315 (new plate ... stiffening ribs to make floor plate system with high-strength bearing capacity.* In the boom conditions, the floor boards only as ...