... /layer b)Pitch is 50 mm, beam is adjustable. Medium duty rack/storage rack/warehouse shelves:a)easy assembly and disassembly,and limitless connection ... hanging, layer plates, safety pins, Limiting nails and plastic footing.d) Boltless lock-in structure, simple and quick assembled and disassembled ... .4m Hmax=3.2mFinishPOWER COATINGRemarkNON-STANDARD SPECIFICATION AVAILABLE UPON REQUEST Medium duty rack