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Compound Steel Grating

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Compound Steel Grating

Compound Steel Grating Introduction

Compound steel grating is a type of steel grating product composed of a steel grating and a surface-sealed patterned steel plate, also called checkered plate. It has improved load-bearing capacity and can prevent items from falling through the holes of steel grating.
Compound steel grating from AGICO can be composed of any type of steel grating and a patterned steel plate with different thicknesses. However, the commonly used base plate is G323/40/100 or G323/60/100; the patterned steel plate thickness is commonly 3mm, but it can also be made of 4mm, 5mm, or 6mm patterned steel plate.

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Compound Steel Grating Production:

According to the ISO industrial platform standards, it is explicitly stated that liquid should not be accumulated on industrial platforms, except in special circumstances. However, in some special situations (such as pedestrian overpasses), some platforms require the absence of voids. To meet this requirement, By welding patterned steel plates on the front or bottom surface, it can prevent small objects from falling, this is why compound steel grating has been designed and developed.

Compound steel grating is produced by welding checkered metal plate onto metal steel grating, heat from welding could lead to deformation.

Application of Compound Steel Grating:

Compound steel grating is widely used in various fields such as power plants, chemical plants, oil refineries, steel mills, paper mills, machinery factories, cement plants, municipal engineering, wastewater treatment plants, municipal engineering, sanitation projects, etc., It is used as platforms, walkways, gangways, trench covers, manhole covers, ladders, and others.

Compound steel grating is commonly used with series 3 steel grating as the base plate, but series 1 or series 2 can be used as the base plate according to customer requirements. The  compound steel grating has advantage compared with ordinary steel gratings,  by welding steel mesh on the front or bottom surface of the steel grating, which can prevent small objects from falling. When used in granaries, restaurants, and warehouses, the compound steel grating panel can prevent small animals such as mice from entering.

Features of Compound Steel Grating:

  • Aesthetically pleasing with a shiny surface, and it does not accumulate dirt. It does not accumulate rain, snow, or water, self-cleans, and is easy to maintain.
  • Provides ventilation, lighting, heat dissipation, anti-slip properties, and explosion resistance. It is also easy to install and dismantle.

Compound Steel Grating Installation Methods:

  • Weld the steel grating or tread plate directly to the supporting steel structure, and apply two coats of zinc-rich paint at the welds.
  • Use specialized installation clips from AGICO, which do not damage the galvanized coating and are easy to install and remove. Each set of clips includes an upper clip, lower clip, M8 round head bolt, and nut.
  • Stainless steel clips or bolt connections can be provided as alternative fastening methods, depending on the requirements.
  • The recommended installation gap for steel grating is generally 100mm.
  • During installation, ensure a secure and reliable installation and regularly inspect to prevent loosening or detachment of the clips. It is advisable to weld or use rubber pads for steel grating in close proximity to vibrations.

Compound Steel Grating Dimensions

Compound Steel Grating Thickness mm Checkered Plate Thickness mm Dimension Pedestrian load maximum spanmm
Dimension
DGP23 23 3 DG205/40/100 1100
DGP28 28 3 DG255/40/100I 1300
DGP35 35 3 DG325/40/100I 1600
DGP41 41 3 DG385/40/100I 1900
EH3P47 47 3 DG445/40/100I 2100
DGP53 53 3 DG505/40/100I 2400
D G P, where P represents compound steel grating and the number indicates its thickness. The table above shows some commonly used standard Compound steel gratings. It is also possible to use thicker patterned plates and other specifications of steel gratings. If you have any other requirements, please contact us to place an order.

Safety Load Table for Compound Steel Grating

Model Flat bar Dimension mm Cross Bar pitch mm Cross Bar Dimension mm Weight   Span mm
9 0 0 1000 1050 1100 1150 1200 1250 1300 1350 1400 1500 1600 1700 1800
G405/40/100FG 40×5 100 6×6 48 U 51.39 41.51 37.59 34J9 31 23 28.63 26.34 23.81 21.18 18.92 15.24 12.43 10.24 8.51
D 3.17 3.92 4.32 4.74 518 5.65 6.13 65 6.75 7 7.5 8 8.53 9
G403/40/100FG 40×3 100 6×6 30,1 U 30.80 24.86 22.5 20.46 18.65 17.12 15 74 14.20 12.62 11.26 9,05 7. 36 6.04 5.00
D 3.17 3.92 432 4.74 5.19 5.65   6.13 6.5 6.75 7 73 8 8.5 9
G355/40/100FG 35×5 100 6×6 43,9 U 39.30 31.72 28.71 26.11 23.10 20.25 17.83 15.78 14.01 12.49 10.02 8.14 6.67 5.51
D 3 62   4.94 5.42 5.75 6 6.25 6.5 675 7 75 8 8,5 9
G353/40/100FG 35×3 100 6×6 27.6 U 21.56 19.00 17.19 15.62 13.79 12.07 10.62 9.38 8.32 7.4 5.92 4.78    
D 3 62 44S 4.94 5.43 5 75 6 6.25 65 6.75 7 75 8    
G325/40/100FG 32×5 100 6×6 39.0 U 3185 26,50 23.28 20.17 12.57 15.38 13.53 11.96 10.61 9.45 7.56 6.11 4.99 4.10
D 3.97 4.90 5.25 5.5 5.75 6 6.25 6.5 6.75 7 7.5 8 3.5 9
G323/40/100FG 32×3 100 6×6 24.7 U 19.70 15.87 13.92 12.04 10.47 9.15 8.04 7.09 6 28 5 58 4 44      
D 397 4.90 5.25 5.5 5,75 6 6.25 6.5 6.75 7 7.5      
G255/40/100FG 25×5 100 6×6 31.2 U 17.68 12.73 10.92 9.42 8.17 7.13 6.24 5.48 4.84 4.28        
D 4, 5 5.25 5.5 5.75 6 6.25 6.5 6.75 7        
G253/40/100FG 25×3 100 6×6 20 U 10.59 7.6 6.5 5.69 4.84 42                
D 4.5 5 5.25 5.8 5.75 6                

Compound Steel Grating Specifications

Material standard Bearing bar Cross bar Bearing bar pitch Cross bar pitch
Q235 25mm*3mm 5mm 20mm 50mm
25mm*5mm 22mm
30mm*3mm
Q345 30mm*5mm 27mm
32mm*3mm
32mm*5mm 6mm 30mm
ASTM A36 35mm*5mm
40mm*3mm 31mm 100mm
40mm*5mm
ASTM A1011 50mm*5mm 8mm 32mm
60mm*5mm
60mm*8mm 34mm
ss400 75mm*5mm
75mm*8mm 40mm

Compound Steel Grating Fastening Types

Type of saddle clips Grating Specification
A30 B-30 C-30 Beanng bars at 30 nun pitch
A-40 B-40 C-40 Beanng bars at 40 tnm pitch
A-60 B-60 C-60 Bearing bars at 60 mm pitch

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