I am looking for some references regarding the design of manholes that are constructed of brick and mortar. I have a reviewer who is asking for documentation that an opening which has been plugged with brick and mortar is capable of handling the lateral force from the earth pressure.
I’ve tried...
Is there a place to buy a chain drag to use on a bridge deck? Or does everyone make their own? I can’t seem to find a place that sells them as a piece.
Is there a guide by AASHTO or other agency that defines loads/stress limits/etc on items that are being transported? For instance, tensile stresses/lifting points in a pcb or steel girders? I figure fabricators, or their engineers, use something but wasn't sure of a publication or if there are...
Has anyone obtained this new publication by AASHTO? I'm wondering how much info is really in it. I deal with steel plate girders a lot so I'm trying to see if the cost is justified or not.
I am studying for the lateral portion of the SE exam and I am confused with the ASCE 7-10 wind provision chapters 26-28. I'm in the bridge world so I don't deal with 7-10 but I was somewhat familiar with 7-05 and it's all different than what I was used to. What is the difference between the 3...
I have a fairly wide bridge with 10+ girders and I'm curious how others take care of the composite deflection for the traffic rail/parapet. For strength design, I distribute the rail weight to no more than 3 beams. But what about for the deflection?
I'm waffling back and forth whether to use...
I have a project that we are considering using the Type I beams, but it seems like the local precasters can't find the forms anymore. It's not common to use this beam but we have a special circumstance.
Wouldn't the precasters still be able to do the beam even if it was 3-5x more expensive...
Are there any references that give ideas of paint systems to use with structural steel that is exposed to different environment types? I have a very small project next to a wastewater treatment plant and corrosion is a concern due to the gases.
I'm looking for something that specifies the...
I was wondering how one man shops do quality control on their calculations and drawings. Do you sub out to someone to check your math or just set aside for a few days?
Are there any of rules of thumb for the design fee of a pipe rack? I have a fee created and just want to know if I'm in the ballpark. It's been a while since we have done one so I'm little rusty.
The pages can't simply be replaced anymore (for some time now...) and the way AASHTO prints them, they don't line up well with the format. How is everyone organizing the Interims to the LRFD Bridge Design Spec?
Are you making notes in the original and just stating to see the Interims? I'm...
I've had the most random project come across my desk. I need to determine cost per square foot of several bridge types. I don't have any information or experience with arches, suspension,or cable stayed bridges.
I looked up some signature bridges and found the cost, lengths, and widths for a...
Does anyone have any good references for heat straightening girders? What about beams that have already been partially replaced before that need to be repaired again?
Does the existing patch need to be replaced or can you replace a smaller area that's within an existing replacement section?
Waiting on my flight so I can get home from the steel bridge symposium and I was thinking about some of the topics that were covered. Has anyone in the US ever designed one or know any that exist in the states? I thought it was an interesting concept however I don't think aashto addresses them...
Has anyone ever seen/heard of a composite steel truss? To clarify, I mean that the stringers/floorbeams would be composite w/ a concrete deck that is placed on top. I'm wondering if this has ever been done.
In the last couple of months work in our firm has started to slow way down. We have plenty of projects in the backlog, a couple really big projects but will eventually take another 1-1.5yrs before any bridge work really begins. There is a project or two that has a lot of work still to be done...
I have a floorbeam that is pinned at both ends with a temperature load applied to it. As expected, this produces a very high axial force. To reduce the force I will allow the support to move say 1/8". If I specify "enforced but" supports and a support displacement would that be accurate or is...
Does anyone have experience w/ or have some really knowledgeable references covering high performance steels? I've done some searches and found some information but I'm always looking for more. One specific question I have is if rolled shapes are produced in these types of steel. Everything...
A sr. engineer has been checking a set of plans that I had done a while back and questioned the development length of the reinforcing in the column to the pier cap. I used the basic development length, but did not include any modification factors. Would you use the basic development length or...
