Truck Loading
Truck Loading
(OP)
I have a contractor that wants to drive construction equipment and supply trucks (i.e. concrete trucks, dump trucks, etc.) over an existing precast tunnel. The 20' planks were specified to be designed in accordance with HS-20 requirements. I can't find any information if the HS-20 loading is appropriate for this situation. I know it is a popular bridge designation, so I think it would be. However, a few google searches have shown that some of the trucks may exceed the 32k rear axle load requirement. How is this typically handled on a bridge project? It seems that any bridge would be required to be designed for HS-20 would also be subject to heavy concrete/dump truck loads as well.






RE: Truck Loading
RE: Truck Loading
Do you know that your tunnel is only designed for HS-20 and not one of those other design vehicles as well?
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The name is a long story -- just call me Lo.
RE: Truck Loading
Unfortunately, the 'HS-20' designation does not give you enough info.
I'm guessing your bridge was 'pre-1993'
The HL-93 design model designation would tell you that the bridge was designed for the HS-20 truck plus the design lane. It would also tell you that the bridge could handle the design tandem (~concrete truck) plus the design lane.
RE: Truck Loading
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The name is a long story -- just call me Lo.