Trench cover grating for making ditches (well) cover plate with a variety of models to choose from to fit different span loads and requirements. Trench cover materials: 

1, flat steel: material Q235A or stainless steel, General graphic type, skid gear and sections-I. 

2. common specifications include 20*5, 25*5, 25*3, 32*5, 32*5, and 40*5, and 40*3, and 50*5, and 65*5, 75*6, 100*8, and 100*10 etc. 

3. rail: material Q235A/304 stainless steel round bar, twisted steel, square or hexagonal. Twisted steel are die-drawing and twisted, and its specifications are 5*5, 6*6, 8*8mm, etc.