The Contractor on a steel pile trestle bent bridge has proposed placing a welded pile splice within the concrete pile cap.
The pile (PP36x1.0) is embedded 36" into the cap and they wish to splice it 4" into the cap (prefabbed top 32" piece)
Would you have a concern in splicing that close to...
I have never designed a timber pile...but find the need to do it now. I have done enough timber design to get the concepts, but am stumped about the round member...
How do you determine the shear capacity of a round member? Can you use the typical 85 psi allowable shear stress of a timber...
I am currently designing a fix for a damaged historic steel truss bridge. A couple of the members recieved only minor local bending (on flanges, etc..) as a result of the hit.
I plan on having the contractor hot work the area back to shape.
Does anyone have sample specifications for this type...
I am currently doing a strength design hand check for a 72" Bulb-T. While doing the check for rectangular-vs-T Beam action, I am getting "odd" results for the depth of the neutral axis "c-value" (using equations in LRFD 5.7.3.1.
Using my numbers I get that the rectangular section "c" is more...
Has any of you ever placed a cantiler mast arm signal pole within the span of a bridge? The signal designer on a project that I am working on is pushing for this.
I feel that inducing approximately 240kip-ft into the deck and Bulb-T beams is unreasonable.
This is complicated by the fact that...
I was asked today about why a precast prestressed girder's camber goes up between initial release and 3 months and 5 years.....
I have always just accepted that it does. I am sure that I was proven it in college, but the reason has left me.
Can anyone please help with the reasoning? thanks
I often have a difficult time knowing what steel to spec for the minor uses...i.e a stainless steel rod, should it be A304, A307?
Does anyone know of a website or document that helps aid in this selection process?
The local standard for connecting adjacent prestressed precast slabs is via tie rods. Recently, a local Contractor has submitted a set detour structure plans that use a "weldment" detail to connect the slabs.
Have anyone on this forum used this detail? if so, how well does it perform? I have...
I am currently designing a widening/rehab on a historic concrete bridge. I need to place two utility sleeves through the end bent. I plan on having the contractor core through the concrete (12" dia and 14" dia sleeves). the holes are located approx 5 1/2 feet below the deck surface.
I am...
Has anyone ever designed in Hammered Steel? If so, what properties should you expect? is it similiar to typical structural steel?
Any input would be appreciated
ALthough not a true bridge question, still hope some one can help.
I am looking for the proper culvert material to use in the following situation:
Cover = 70ft
Size = 7' dia
Environ = Marine (50 feet from ocean)
Note: emergancy situation, so a custom concrete does not work
With the extreme...
I am currently designing a steel structure with a full dpeth precast deck. It will be the first one in our area.
Does anyone know of a state that has standard drawigns for such an item? If so, could you please post a link.
Also, any good articles that I about the topic?
Thanks
The term "Balanced spans" on multiple span bridges is common, but not well defined.
What is your "rule of thumb" to obtain balanced spans on bridges? where does this come from? do you know of anywhere that I can read up on this?
The term "Balanced spans" on multiple span bridges is common, but not well defined.
What is your "rule of thumb" to obtain balanced spans on bridges? where does this come from? do you know of anywhere that I can read up on this?
