Welded fixed tread plate, directly welded to the ladder beam, does not need to add the side plate of the tread plate, relatively economical and durable but not easy to disassemble, the bolted tread plate needs thickened side plates on both sides, and the side plate is drilled The installation is fixed directly by bolts and can be recycled and reused. Customers can customize according to their actual needs, and can be made into various sizes with suitable types of steel gratings to match the corresponding stairs.