Hello,
I'm looking at a rail slab bridge (concrete slab with steel rails near the bottom of slab), and I'm determining how to consider the contribution of the steel rails near the bottom of slab. I do not have details of any mechanical anchorage of the rails in the slab, so I would need to...
I think I have a pretty good understanding of development length, but I'm wondering what the difference is between this and cutoff length? If a bar is at a point where it's no longer needed, wouldn't it also need to be developed to this point as well? Any help explaining this would be appreciated.
I have a situation where the spacing requirement for a non contact lap splice can't be met. Can I just develope the reinforcing on either side of a potential crack? Essentially provide 2x the development length?
Hello,
I'm looking for an end of bridge detail in which a precast approach slab is supported on GRS and post-tensioned to precast full depth deck panels, which are supported on steel or concrete beams. Apparently this detail was used on the Tennessee Fast Fix 8 bridges for I-40 over Clinton...
I'm designing a box culvert per AREMA. The group IA load combinations for concrete design include a 1.8 factor for all loads. This culvert is under very deep cover making the 1.8 earth load factor very dominant. This is much more than the aashto factor of 1.3. Has anyone ran into this and is...
Hello,
A contractor wants to drill into a new precast box culvert for forming the cast in place headwalls. He would fill them with grout after. Is this generally acceptable practice?
Thanks
Hello,
Has anyone had experience with epoxy grout injection in cracks over 1/4" wide. There is a crack through stone masonry up to 1" wide and I'm trying to see if epoxy grout injection should be used. Most of the products I see are for up to 1/4" wide.
Thanks
Hello,
I am performing a load rating on a steel beam bridge with transverse timber plank deck. The timber deck is causing the bridge not to rate adequately. I am thinking of ways to temporarily strengthen the deck. I think placing a steel plate (3/4" +/-) over the deck would suffice, but am...
Hello,
I am performing a load rating for a bridge and the rating vehicle is a tracked rig. The lateral track spacing and contact area of the tracks is similar to but not the same as an H20 truck. I was going to use the distribution factors in the aashto standard specs, but then I decided to...
Has anyone had experience with integral abutments on spread footings? I found two DOTs that describe the use; Maine Dot and Nevada DOT. I could only find details on Nevada DOT. I am looking at using, but trying to do a little more research and finding little information. Thanks for any help.
The material that my state's spec book refers to for permanent steel sheet piling is AASHTO M202.
I can't seem to find this spec. without having to pay to download it. Does anyone know if this refers to a particular grade of steel? Also, I assume this is a corrosion resistant steel, although...
I have a project where we are trying to drive sheet piling in front of an existing bridge abutment. There is about 10' of headroom between the channel bottom and the bottom of steel beams, and the piling needs to be driven about 8'-10' into the ground. Is it possible to drive the sheeting with...
A while back somebody asked this question and the thread has been closed. I was curious if anyone knew the answer to this question? It is shown below:
"We are performing construction services for a project on which we also performed the design. The superstructure is comprised of prestressed...
I am working on a bridge deck design and considering the vehicle collision for the deck overhang. The railing is post and beam and the plastic moment from the post transfered to the deck is fairly large.
I am wondering if anyone has any experience/information regarding this. I can't seem to...
