Page 272 - Bridge and Highway Structure Rehabilitation and Repair

CHAPTER 6 APPLICATIONS OF BRIDGE DESIGN AND RATING METHODS 247

Table 6.3 Maximum live load moments and shear forces for HS-15 truck single, span only
(alternate lane loads apply).
HS-15 Truck Moments HS-15 Truck Shear
AASHTO
Span Length AASHTO LL M max = 13.5 (L-1.55) Reaction/Shear Vmax = 18
(Feet) Moment (Kip-Ft) (L-14)/L* (Kip-Ft) Force (Kips) (3L-28)/L (Kips)
Small spans
30 211.6 204.84 37.2 37.2

40 337.4 337.40 41.4 41.4
Medium spans

50 470.9 470.93 43.9 43.92
60 604.9 604.96 45.6 45.6

70 739.2 739.26 46.8 46.8
80 873.7 873.74 47.7 47.7

90 1008.3 1008.33 48.4 48.4
100 1143.0 1143.00 49.0 48.96

110 1277.7 1277.74 49.4 49.42
120 1412.5 1412.52 49.8 49.8

Long spans
130 1547.3 50.7

140 1682.1 53.1
150 1856.3 55.5

160 2076.0 57.9
Lane load governs Lane load governs
170 2307.8 60.3

180 2551.5 62.7
190 2807.3 65.1

200 3075 67.5
* Developed by the author.