Page 287 - Bridge and Highway Structure Rehabilitation and Repair

262 SECTION 2 STRENGTHENING AND REPAIR WORK

6.7.2 Sample of a Rating Worksheet
Based on AASHTOWare software an example of output ratings are presented below. In this
case HL-93 loads were not applied as overstress was possible on some of the members. Instead
HS 20 vehicle (36 Tons) results are compared with Type 3 (25 Tons), Type 3-S2 (40 Tons) and
Type 3-3 (40 Tons) vehicles.

Structure No.:______________ Route:________________ Cycle No.: 16
Insp. Date: 11/07/2008
SUMMARY OF RATINGS

The Load Factor and Working Stress ratings, computed in the 9th Cycle report in accordance
with the FHW directive dated November 1993 and AASHTO Manual for Condition Evaluation

of Bridges, 1994, as modified by Division 4 of the New Jersey Department of Transportation
Design Manual, Bridges and Structures, are as follows:
Computer Program Used: AASHTOWare Virtis (Version 6.1.0)
PERCENT (%) SECTION LOSSES: N/A
Allowable Stresses (Psi)
Material Compressive Yield Inventory Operating
Strength f'c
Concrete 3,000 – 1,200 1,650
Concrete (Beam) – 40,000 20,000 28,000
Reinforcing Steel – 33,000 18,000 24,500

Rating (Tons)
Truck Type Load Factor
Member (Tons) Inventory Operating
HS-20 (36T) 37* 61*
Span 1 HL-93 (100T) – –
Interior Stringers S4, Type 3 (25T) 32* 53*
S5, S6, S7, and S8 Type 3S2 (40T) 46* 77*
Type 3-3 (40T) 62* 104*

HS-20 (36T) 48 81
Span 2 HL-93 (100T) – –
Interior Stringer S2 Type 3 (25T) 45 76
Type 3S2 (40T) 61 102
Type 3-3 (40T) 72 120

HS-20 (36T) 50 84
HL-93 (100T) – –
Span 3 Type 3 (25T) 47 79
Interior Stringer S2 Type 3S2 (40T) 65 108
Type 3-3 (40T) 77 128

* Controlling Member