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BridgeSmith - Agree, reading more out of interest than utility. I enjoy the historical texts and learning how various items were handled before modern methods and computing power. I’m also interested in the non-technical writing about bridge engineer’s role and duty to society, especially in the...

Well, looks like I should have done a little more investigating before posting. Both volumes of Bridge Engineering are available on Google Books, as well as many other of Waddell's publications. See link below. Sorry for the duplicate thread/post...

Does anybody have a PDF or link to this classic text by Waddell? It was published in 1916 and is now public domain. I found this thread (below) on Eng Tips, but SlideRuleEra's site is no longer active. I, like many others on this site and in the engineering community, found great value in many...

One more thing - a check of emergency vehicle loading is recommended. Don't think it would control over the load case you have proposed, but I would perform a quick check for good measure. The owner will take assurance in knowing there is no restriction to fire trucks and/or ambulances.

I agree with your approach, and the loading / axle configuration you have proposed sounds reasonable. I have worked on several smaller private (and sometimes public) bridges where the AASHTO loading provisions are not applicable and engineering judgement must be used as to how the bridge will be...

Thank you both for your input and clarifications.

Any thoughts?

Looking for a couple of clarifications in Chapter J10.8 for transverse stiffeners. 1.) Regarding the 25*tw vs. 12*tw length of web considered to be part of the "built-up" column. If I have a pair of bearing stiffeners *near* the end of my member, but the 25*tw dimension is still within the...

@ BridgeSmith: Yes, you are correct, I have my modular ratio shown backwards, and it should be Es/Ec like you stated. I assumed a conservative estimate of 2,500 psi for the existing concrete from the 1960s (in reality expect the concrete to be closer to 3 to 4.5 ksi compressive strength). The...

Attached is a cross section of the composite section.https://files.engineering.com/getfile.aspx?folder=59aec3a2-bcbd-41e1-8143-ae224ac5b657&file=Screenshot_2024-08-08_081407.png

Looking into the stability of a composite plate girder during bridge removal. The span in question is a 85' simple span and has 4 girder lines. Prior to girder removal, the overhangs and deck will be sawcut and removed, with sawcuts made near the flanges. Steel cross frames/diaphragms will be...

@LittleInch, the grayed HP14x73 is a driven pile that will support this structure. The vertical load is transferred from the structure via the channel, which will be resting on a bracket welded to the HP14x73. This is a steel template for marine application for driving cellular sheet piles as...

Nice drawing @azcats. That is similar to what I was envisioning, except I am going to bevel all the way from the radius return (where the flange thickness begins changing linearly). @LittleInch, see image below. On the left is the bevel and fillet weld I am proposing to be used on the outside...

Thank you all for your responses. @dvd: That is an interesting thought. I will discuss with the fabricator and see if this is feasible/preferable. My biggest concern would be how precise the cutting of the slots would be. There is a reasonable chance they would be torch cut given the...

Hello. I am looking for guidance/suggestions on a tricky connection for a temporary structure I am designing. I have attached a sketch of the proposed detail. On this structure, steel pipe pile (24" x 0.5" wall) will be supported by a HP14x73 pile located inside the pipe. The HP14x73 has a...

Thank you! Appreciate you taking the time to share this valuable report.