Why doesn’t the contractor use Ground Penetrating Radar (GPR) to avoid the reinforcing bars? That way you don’t have to worry about if they hit a bar.
A good coring sub will also be able to feel if they hit a bar and see metal shavings in the water. If they are paying attention they should not...
How is reroofing changing the snowdrift loads? Or are you adding some equipment or something to it where there is a greater potential for snowdrifts? Make sure you aren't applying modern snow loads to a historic structure unless you are required to.
Regardless of the reason for the overstress...
I agree with r13.
My approach was I went through the multiple choice questions at the start of the exam and labeled each question 1,2, or 3. Ones were for easy questions that I knew how to do right away. Twos were more difficult, but I think I could figure them out in a reasonable amount of...
You probably need to look into the project specifications to see what is required by you, the contractor. if I had to bet, the specifications probably state the contractor to provide a sealed jacking plan. That does not mean the EoR for the whole job is going to seal your jacking plan for you...
You could specify a maximum internal temperature and a maximum temperature differential for mass concrete elements. You could also require the contractor to submit a thermal control plan if you are really concerned. This provides the contractor some flexibility with the actual concrete mix, but...
It's hard for us to know exactly what COMPRESS is doing without seeing the output. I think it's important for you to go through the detailed calculations that COMPRESS is doing to get a better understanding. I have some limited experience with COMPRESS, but I always found the output and...
I would be more inclined to reinforce the chords and web members as required under the new loads. This wouldn't result in a new column and beams having to be added. SJI has published some nice guides and presentations which discuss reinforcing OWSJs...
PROYECTOR is correct, you need to run a nonlinear analysis. I haven't used SAFE, but other CSi products will default to using the compression only stiffness as a tension/compression stiffness in linear analyses.
I'm assuming this is an existing structure that the owner has had for a while and not a brand new building. My firm takes on jobs like this quite a bit, especially in the refining and petrochemical world. The amount of liability you take on is proportional to how you write the report...
