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Thanks we already have that doc. (I think i found it from one of your earlier replies to someone else) Is there any information on the "lifespan" of this stuff?

Thank you for the reply. The County is going to have Caltrans take over the maintaince so they(Caltrans) wants it to their specs. We have never done AASHTO but the bridge is simple so we decided to give it a go. We appreciate this heads up and we will look into it. If there is other heads up...

We are designing a small pedestrian bridge in Calif. that needs AASHTO design. Can someone help with guidance and/or peer review.?

Our office is in the process of designing a small tiltup with very low blast. Our question is with the roof. We are planning on using concrete over metal pan because the metal deck manufacturer does not have specs for blast. Has anyone crossed this path? Is there any design proceedures or...

hokie66 This is exactly our position, but we were looking for some backup (paper) to explain to him that he needs to do this. We have provided all the details necessary for the contractor to do the math. I think he as never installed caissons before. Thom

Thanks a2mfk You got the idea but the contractor wants the elevations and we are reluctant. We can easily provide the top of caissons with respect to the outside grade. This is basically a few additions or subtractions from our details. Most of the contractors we work with have no problem...

Thanks, For the help and if the project was a simple slab on grade or flat it is a very simple addition or subtraction calculations based on the architects elevations. If the site is on a steep slope and we need to rely on the outside finish grade (Which has never been exact as long as i have...

With a structure entirely on drilled piers on a sloping site. Who is responsible for determining the top of the pier? The structural or the contractor? Thanks