Technology

The Minimum Bearing Bar of Steel Grating for Different Kind of Vehicles

Table 1: Minimum Bearing Bar for Various Type of Vehicles
Bar Selection of Welded Steel Grating Floorwith Bar Spacing 34.3 mm
Distance Between Supports
(mm)
This is a black Audi car.
Car
This is a blue and white forklift.
Forklift
This is a truck for transporting goods.
Truck
This is a truck tractors with trailers for cars transportation.
Truck tractors with trailers
Q=2.5 (T) Q=2.5 (T) Q=3.5 (T) Q=7.0 (T) Q=13 (T) Q=6.0 (T) Q=9.0 (T) Q=12 (T) Q=30 (T) Q=60 (T)
P=0.48/0.624 P=1/1.3 P=1.5/1.95 P=3.25/4.225 P=6/7.8 P=2/2.6 P=3/3.9 P=4.5/2 P=5/6.5 P=10/13
A=0.2×0.15 A=0.2×0.2 A=0.2×0.2 A=0.2×0.2 A=0.2×0.2 A=0.2×0.2 A=0.2×0.26 A=0.2×0.3 A=0.2×0.4 A=0.2×0.6
RL RB RL=RB RL=RB RL=RB RL=RB RL=RB RL RB RL RB RL RB RL RB
300 40×4 40×4 40×4 40×4 50×5 70×5 40×5 50×4 50×4 50×4 50×5 50×4 50×4 60×4 60×4
400 40×4 40×4 40×4 40×5 60×5   50×5 50×5 60×4 60×5 60×5 60×5 60×5 70×5 70×4
500 40×4 40×4 40×5 50×5 70×5   60×4 60×5 70×4 70×5 70×5 70×4      
600 40×4 40×4 50×4 60×4     60×5 70×5 70×5     70×5      
700 40×4 40×4 50×5 60×5     70×5                
800 40×5 40×4 50×4 60×5     70×5                
900 40×5 40×5 60×4 70×5                      
1000 50×4 40×5 60×5 70×5                      
1100 50×4 50×4 60×5                        
1200 50×5 50×4 70×4                        
1300 60×4 50×5 70×5                        
1400 60×4 60×4 70×5                        
1500 60×5 60×4 70×5                        

Precautions

To ensure free movement, it is necessary to install 150 dN/m2 and per unit area of 200×200 mm single dynamic load of bearing bar in the most unfavorable position of the exhaust grating.

Meanings of marks

  • Q: The total weight of a full load (T).
  • P: a/b (size of resistance).
    • a: The maximum load capacity of the car (T).
    • b: Value "a", increasing dynamic coefficient (vibration, braking).
  • A: Area, on which the force "P" (m×m).
  • RL: Along the direction of travel of the bearing bar.
  • RB: Along the direction of cross the bearing bar.

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