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Re: Acceptable Level of Overstress

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 I  would not worry about slight overstressing if:
    -it is a roof  beam and the tributrary area is substantial.
    -it is continuous beam and the controlling mode is flexure because there a chance of redistribution of moments. /*The beam would not know whether you used ASD or LRFD method!! */

Suresh Acharya, SE

Gerard Madden, SE wrote:

What is the general practice on acceptable level of overstress when checking an existing member for capacity?


I have an existing wood beam that is 6% overstressed with new loads. I am prepared to deem that “Acceptable”. I was always taught that 10% or less overstressed is okay. I have a plan checker wanting to cut the limit at 5%. Is this somewhere in the code???





Gerard Madden, SE, PE

California Licensed Structural and Civil Engineer


Madden Engineering

2183 Eaton Drive

Lodi, CA 95242

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