Field Welding to Tension Flange - Pedestrian Truss
Field Welding to Tension Flange - Pedestrian Truss
(OP)
Hi:
I am designing repairs for a pedestrian truss bridge. There is a splice at mid span of span 2 (span 2 is 139'-6" long). one of the spliced members is detriorated (diagonal). I want to completely remove the existing spliced diagonal and repalce in-kind. The existing diagonal that is deteriatead is welded at the ends to the top and bottom chords. I am concreted about field welding to the bottom chord as it is a tension member... can anyone offer insight related to field welding in tensions areas?? Please remember this is a pedestrian bridge. I know for PennDOT bridges (vehicle bridges) welding in tension areas is a big NO... What about for my case, should i not specify welding to bottom chord?
Thanks in advance!
I am designing repairs for a pedestrian truss bridge. There is a splice at mid span of span 2 (span 2 is 139'-6" long). one of the spliced members is detriorated (diagonal). I want to completely remove the existing spliced diagonal and repalce in-kind. The existing diagonal that is deteriatead is welded at the ends to the top and bottom chords. I am concreted about field welding to the bottom chord as it is a tension member... can anyone offer insight related to field welding in tensions areas?? Please remember this is a pedestrian bridge. I know for PennDOT bridges (vehicle bridges) welding in tension areas is a big NO... What about for my case, should i not specify welding to bottom chord?
Thanks in advance!






RE: Field Welding to Tension Flange - Pedestrian Truss
RE: Field Welding to Tension Flange - Pedestrian Truss
This article has some info: Link. The big difference between pedestrian and vehicular is surely fatigue susceptibility.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Field Welding to Tension Flange - Pedestrian Truss
The cribbing would have to be 40 ft, steep wooded site.
RE: Field Welding to Tension Flange - Pedestrian Truss
RE: Field Welding to Tension Flange - Pedestrian Truss
RE: Field Welding to Tension Flange - Pedestrian Truss
To which I say, there can't be an incredible amount of tension in the chords at the ends of a truss beam.
Depending on the extent of the deterioration I'd be trying to go bridgebusters route.
RE: Field Welding to Tension Flange - Pedestrian Truss
RE: Field Welding to Tension Flange - Pedestrian Truss