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do ditch cover, Steel structure platform plate, steel ladder’s stair carbon steel (Q235)=A36 Surface Treatment: Hot dip galvanizing, paint or no Flat Steel Grating Drain Cover with Frame WT4 Stair Tread WT2 Stair Tread carbon steel (Q235)=A36 Surface Shape: Plain, Serrated and I type size: 1m Zhanqiao, ditch cover, covers, ladders, railings, factory construction Drain Cover WT4 Stair Tread Serrated Steel Grating Find Similar Products By Duty Steel Grating Brand Name: CHENG HE Model Number: Q195 Q235 Q275 Q345 Duty Steel Grating Galvanized For Drainage Ditch Cover Plate Industrial aluminum stair tread nosing steel roofing philippines gutter leaf guardscustom steel grating catwalk steel grating/ steel gtating stair tread hot steel grating/steel grating cove drainage steel grating cover drainage ditch material Steel ,Low carbon steel ,stainless steel &Q235,A36,SS304 ditch cover, stair tread, etc. 2) Serrated: best non-skid property & safety compared with plain grating. 4. The most popular specifications of Steel Material Q235,SS304 5. S urface treatment Black, hot dipped galvanising Ditch cover: 1. The anchors of frame must be firmly embeded in the cement layer. 2. the supporting surface on the opposite sides of ditch must be smooth and Bar Grating No Plate Nosing Stair Tread Steel grating is made by the