Prepared by Eric Farm, 1 FEB 99

# Beams CL-CL Beam Width Beam Depth Beam Fb Beam Fv Deck Tkns Deck Wth Deck Fb Deck Fv Dead Load df Inv Ratio Inv Ratio Opn Ratio Opn Ratio GVW GVW   ft in in psi psi in ft psi psi lb/lft   shear bend shear bend inv opn 3 11.0 14.25 72 2400 165 6.75 16 1200 126.875 783.33 0.91/.90 1.15 1.34 1.54 1.80 51.68 69.10 3 11.0 14.25 72     8.00     126.875     1.49 2.05 1.99 2.73 67.08 89.64 4 12.5 12.25 48     6.75     126.875     2.70 1.27 3.60 2.12 45.15 75.46 4 12.5 12.25 60     6.75     126.875     2.63 2.49 3.52 3.79 88.65 125.13 5 13 8.75 36     6.75     126   .54/.54 1.40 0.16 2.07 0.51 7.07 22.76 5 12.5 8.75 48     6.75     126   .52/.60 1.75 0.75 2.33 1.29 33.63 58.02 5 13 8.75 48     6.75     126   .54/.54 2.40 1.12 3.36 1.72 50.25 77.27 5 12.5 10.75 48     6.75     126.875   .52/.60 1.83 1.05 2.43 1.71 47.10 77.07 5 12.5 10.75 60     6.75     126.875   .52/.60 1.83 2.00 2.43 3.02 82.13 109.48 6 12.5 8.75 36     6.75     126.875   .42/.50 1.52 0.28 2.22 0.66 12.72 29.72 6 13 8.75 36     6.75     126   .43/.42 1.62 0.33 2.37 0.76 14.68 34.29 6 13 8.75 36     6.75     126   .43/.42 2.10 0.44 3.07 1.03 15.71 36.70 6 13 10.75 36     6.75     126   .43/.42 2.33 0.92 3.24 1.46 41.41 65.51

Best Glulam Alternative

Acceptable Designs

Unacceptable Designs

Bridge Span: 80 ft
Skew: 0°
Roadway Width: 14 ft
Total Deck Width: 16 ft
Deck: Interconnected Glulam Panels
Stringer Type: Glulam
Number of Lanes: One
Modulus of Elasticity: 1800000 psi
Minimum Deck Panel Width: 48 in
Wheel/Track Gage: 6 ft

Back to Washougal Bridge Project