Standing post: 50*30mm * post plate adopted welding method with simply and fastness structure and can bear the weight of large loading. * both primary or subsidiary rack can be connected without limitation, easy installing or dismantling, saving cost of investment. * both the space of poles hole in 50mm and the height of plywood can be regulated freely, and the layer surface can use either steel plywood or wooden plate as well. * joining of crossbeam and post plate by using inserting method to combine together. * loading weight of each layer is between 50kg~150kg * rack surface is treated by plastic-blasting. 1 bundled with steel belt and environmental wrapping for exporting 2 we can provide packaging according to the performance of the goods 3 customer requirements.