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BAR SIZES

  1" x 1/4"     1" x 5/16"     1" x 3/8"     1-1/4" x 1/4"     1-1/4" x 5/16"  
  1-1/4" x 3/8"     1-1/2" x 1/4"     1-1/2" x 5/16"     1-1/2" x 3/8"     1-1/2" x 1/2"  
  1-3/4" x 1/4"     1-3/4" x 3/8"     2" x 1/4"     2" x 5/16"     2" x 3/8"  
  2" x 1/2"     2-1/4" x 1/4"     2-1/4" x 3/8"     2-1/2" x 1/4"     2-1/2" x 5/16"  
  2-1/2" x 3/8"     2-1/2" x 1/2"     3" x 1/4"     3" x 5/16"     3" x 3/8"  
  3" x 1/2"     3-1/2" x 1/4"     3-1/2" x 3/8"     3-1/2" x 1/2"     4" x 1/4"  
  4" x 5/16"     4" x 3/8"     4" x 1/2"     4-1/2" x 1/4"     4-1/2" x 3/8"  
  4-1/2" x 1/2"     5" x 1/4"     5" x 5/16"     5" x 3/8"     5" x 1/2"  
  6" x 1/4"     6" x 5/16"     6" x 3/8"     6" x 1/2"    

1 Ton, 3 Ton, 5 Ton, H15, H20 and H25 Loads
  • Total Load = dead weight of vehicle plus weight of load carried

  • 80% of total load carried on one axle

  • Wheel load = 1/2 of axle load

  • Impact factor - 30%

  • Method of load distribution:

    • Each wheel distributed over a width of 1" per ton of total load plus 2 times the distance center to center of bearing bars and over a length of each bar equal to 1" per ton of the total load.
  • Maximum allowable stress = 20,000psi

  • Modulus of elasticity = 29,000 psi.

  • Simple span

  • Maximum deflection = 1/400 span
BAR SPACING

       22W2 Bearing Bars 1-3/8" Center to Center Cross Bars 2" Center to Center
       30W2 Bearing Bars 1-7/8" Center to Center Cross Bars 2" Center to Center
       38W2 Bearing Bars 2-3/8" Center to Center Cross Bars 2" Center to Center

       22W4 Bearing Bars 1-3/8" Center to Center Cross Bars 4" Center to Center
       30W4 Bearing Bars 1-7/8" Center to Center Cross Bars 4" Center to Center
       38W4 Bearing Bars 2-3/8" Center to Center Cross Bars 4" Center to Center
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     Email Address: info@aagrating.com / Phone Number: (800) 962-9692 / Fax Number: (412) 771-6980
     Mailing Address: All American Grating, 3001 Grand Avenue, Pittsburgh, PA 15225