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how do you decide if a soils report is required?

how do you decide if a soils report is required?

how do you decide if a soils report is required?

(OP)
Hi,

One of my current projects is a utility in a well developed street. Back when we did the proposal, my boss didn't think we needed a soils report because our utility is in a street that is already well developed, and is the continuation of one we designed recently (which I think already had a soils report.)

My supervisor, however, thinks we should get a soils report for *every* project in every location.

What is your opinion?

RE: how do you decide if a soils report is required?

I am biased, but I really believe your supervisor.  You should get a soils report for every project.

Most of the cost over-runs on a project are soils related.  

RE: how do you decide if a soils report is required?

(OP)
Actually, it turns out we had one done on the same section of the same street already, so I remembered the reason for not doing a new one incorrectly.

Thanks.

RE: how do you decide if a soils report is required?

I'm inclined to agree with your supervisor and eric1037 -- every project requires a geotechnical report.  Such reports are usually inexpensive and are a pretty cheap way to ensure that the correct design is implemented.

I wonder what your firm's insurer thinks about you inferring data from other sites? I think they'd consider a geotech report to be a pretty cheap way of mitigating their risk.

RE: how do you decide if a soils report is required?

(OP)
Yes, you're right.

I was wrong about the reason we weren't getting a geotech report for this project. I thought it was because we had one for the adjacent section of street, but it was because we actually already had one for the exact same section of street, for another project.

Thanks.

RE: how do you decide if a soils report is required?

If the other project is different from the intended development, you may need at least a review of the old Geotechnical report.
One can not use a Geotechnical report done for a site and a proposed 2 storey building to design/build a 10 storey building on the same site.

How much is the cost of the Geotechnical report as a fraction of the development cost?
I just find hard to believe that a client wouldn't spend few thousand dollars at the risk of spending few hundred thousand in remedial works!

I'm structural engineer so I don't make money from Geotechnical reports, but I strongly recommend my clients to seek professional Geotechnical advice. And they do. Just explain them what the risk is. They will appreciate your advice and professionalism.

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