Lane Load on Box Culverts?
Lane Load on Box Culverts?
(OP)
Hello,
I am running a structural design on a box culvert, and I have a question on live load application using the old AASHTO Standard Specifications 17th ed. (Yes, I realize that most places are using the LRFD specs now. But anyway...)
The specs say that truck -or- tandem -or- lane should be applied to determine the maximum force effects. But I have found in a couple different places that the lane load need not be included for the design of box culverts and other buried structures - it is meant for the design of deck slabs. Here's one place:
http ://precast .org/2010/ 07/hl93-tr uck-loads- vs-hs20-tr uck-loads/
The lane load is also ignored in ASTM C1433, and in FHWA's popular "Boxcar" design program. I cannot find any place in the code where AASHTO specifically says that the lane load can be ignored. Does anyone know where??
Thanks!
I am running a structural design on a box culvert, and I have a question on live load application using the old AASHTO Standard Specifications 17th ed. (Yes, I realize that most places are using the LRFD specs now. But anyway...)
The specs say that truck -or- tandem -or- lane should be applied to determine the maximum force effects. But I have found in a couple different places that the lane load need not be included for the design of box culverts and other buried structures - it is meant for the design of deck slabs. Here's one place:
http
The lane load is also ignored in ASTM C1433, and in FHWA's popular "Boxcar" design program. I cannot find any place in the code where AASHTO specifically says that the lane load can be ignored. Does anyone know where??
Thanks!






RE: Lane Load on Box Culverts?
RE: Lane Load on Box Culverts?
Are you saying that the decision of ASTM C1433 to check only the tandem and truck is because by inspection the lane load will not control?
RE: Lane Load on Box Culverts?
"Live loads shall be either the AASHTO HS-Series or the AASHTO Interstate Design truck loads."
No mention of lane load.