Hebei Zhuote wire mesh products Co., LTD
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Hot Dipped Galvanized Catwalk Canal Cover For Rain Gutter Treads Steel Grating
Product descriptions
1. The center spacing of flat steel is 12.5 ~ 30, 32.5, 40, 60, 80, 90mm, etc. 30mm is recommended.
2. Rod spacing, 30 ~ 170mm optional. It is recommended to use 100mm.
3. Flat steel shape marking:
F- indicates that the section is flat steel of flat shape (which can be omitted in the marking);
S- represents a toothed flat steel section;
I- denotes "I" type flat steel section.
4. Surface treatment marks:
G- stands for hot dip galvanizing (may be omitted in marking);
P- for paint;
U- means no surface treatment.
| Common Specification of Steel Grating | |
| Material Standard | ASTM A36, A1011, A569, Q235, S275JR, Stainless steel 304/316, Mild steel & Low carbon steel, etc |
| Bearing Bar (Width x Thickness) | 25x3, 25x4, 25x4.5, 25x5, 30x3, 30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10…..100 x10mm etc; I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etc |
| Bearing Bar Pitch | 12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3,32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etc. US standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. |
| Twisted Cross Bar Pitch | 38.1, 50, 60, 76, 80, 100, 101.6, 120mm |
| Surface Treatment | Untreated(black), Hot-dipped galvanized, Powder coated, Electroplate, Painting or as per customers' requirement. |
| Grating Style | Plain / Smooth, Serrated / Teeth, I bar, Serrated I bar |
| Packing | (1) Bandage and Paperboard: Generally applies to neat steel plate; (2) Screw Locking Method: Use 4 screw rods through the aperture of the steel grid, for high strength; (3) Steel Pallet: Traditional export packing. |
Surface treatment
1. The surface treatment of steel grating plate (also known as steel grid plate) has three ways: hot dip galvanizing, painting and no treatment.Hot dip galvanizing is recommended for surface treatment.
2. Hot dip galvanizing is the steel grating plate (also known as steel grid plate) parts immersed in molten zinc bath, forming zinc coating on its surface process and method.The thickness of flat steel is in the range of 3 ~ 5mm, and the average thickness of galvanized layer is about 70μm.In the range of pH 6 ~ pH 12.5, the surface of the galvanized layer forms a stable protective film with good corrosion resistance.