Gb T13912 Metal Deck Grate Steel Grating Panels Hot Dip Galvanized Steel Grating

Gb T13912 Metal Deck Grate Steel Grating Panels Hot Dip Galvanized Steel Grating

1.Product Overview

Hot dip galvanized steel grating panels are used where drainage, ventilation, load bearing, and walking safety need to be combined in one structural component. This product is suitable for industrial walkways, steel floor decks, stair treads, trench covers, drainage channel covers, and platform flooring in buildings and industrial facilities.

The product is built from load bearing flat bars and cross bars arranged into an open grid structure. This design is widely used in projects that need water discharge, light transmission, slip resistance, and reliable support under pedestrian or service loads.

2.Technical Solution

The grating uses low carbon steel bearing bars with defined spacing and cross bars fixed into a rigid panel structure. In practical use, the final performance depends on five linked factors: bearing bar size, bearing bar pitch, cross bar pitch, support span, and surface treatment.

The page lists common bearing bar sizes from 20x3 up to 60x5 and larger options such as 50-75x8mm. It also shows standard panel design codes such as G203/30/100, G255/40/50, and G605/60/50. These codes matter because they directly reflect bar size, bearing bar spacing, and cross bar spacing, which are the main structural inputs for panel selection.

Hot dip galvanizing to GB/T13912 is used to improve corrosion resistance in outdoor, wet, and industrial service conditions. For access areas such as walkways and stair treads, plain, serrated, or I-shape bar types can be selected according to slip resistance and load requirements.

3.Specifications

4.Application

This material is suitable for industrial platforms, stair treads, handrails, channel floors, railway bridge sides, high altitude platforms, drainage ditch covers, manhole covers, and stereo parking structures.

It can also be used in power stations, boilers, shipbuilding, petrochemical plants, chemical facilities, municipal construction, transportation projects, building material plants, and general industrial buildings.

Because the open grid structure provides ventilation, light transmission, and water discharge, it is also suitable for walkway flooring and drainage covers in factories, schools, public facilities, sports fields, and garden structures.

5.Processing

• The grating can be fabricated and welded into different panel shapes according to drawings and site dimensions.
• For walkway and floor deck use, the bearing bar direction should follow the support span. For trench and drainage covers, the opening size and support frame need to be confirmed before selecting bar size and pitch.
• When the grating is used in wet or outdoor environments, hot dip galvanizing is the more suitable finishing route because it protects weld zones, edges, and exposed steel surfaces after fabrication.

6.Advantages

• The open grid structure supports drainage, ventilation, and light transmission while maintaining a load bearing surface.
• Multiple bearing bar sizes and pitch combinations allow the grating to be matched to different spans and structural loads instead of using one fixed panel type.
• Hot dip galvanizing to GB/T13912 improves corrosion resistance for outdoor and industrial conditions.
• Plain, serrated, and I-shape bar options help match different requirements for slip resistance, weight control, and structural rigidity.
• The product can be fabricated according to drawings, which is useful for non-standard openings and project-specific layouts.

7.How to Choose

• Choose the bearing bar size according to actual support span and service load. Smaller bar sizes are more suitable for lighter pedestrian areas, while larger bar sizes are more suitable for longer spans or higher loads.
• Choose bearing bar pitch according to the required balance between load support and open area. Tighter pitch gives a denser surface, while wider pitch improves drainage and ventilation.
• Choose serrated grating for wet walkways and stair treads where better anti-slip performance is needed.
• Choose hot dip galvanized finish for outdoor, humid, or industrial environments where corrosion resistance is important.
• Confirm the support frame, span direction, and installation area before finalizing the grating panel code.

8.FAQ

Q1. What is the main use of this steel grating panel
It is mainly used for walkways, platforms, stair treads, trench covers, drainage channels, and structural access flooring.

Q2. What material standard does this product use
The listed material standard is low carbon steel with equivalents Q235, A36, and 43A.

Q3. What surface treatment is recommended for outdoor use
Hot dip galvanizing is the recommended surface treatment for outdoor and wet service conditions because it provides better corrosion resistance than untreated steel.

Q4. Can the panel be made according to drawings
Yes. The grating can be fabricated and welded into different shapes according to drawings and installation requirements.

Q5. What is the difference between plain and serrated grating
Plain grating is suitable for standard structural flooring, while serrated grating is more suitable for wet areas and stair treads where better foot grip is required.