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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6689
Experience:  Structural Engineer
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I have salvaged large beams from an old Sheplers

Customer Question

I have salvaged large beams from an old Sheplers building,some kind of pine, soft. size 3 1/8"x1 3/8" x8 1/4" tall, need to find out possible size, grade,specks on lowest grade support beam of this kind, for building permit.? Longest span is 19' .
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.

Can you attach a picture or sketch of the beams?

Customer: replied 1 year ago.
if you need a better on i will, but they are painted now.
Expert:  StructuralEng replied 1 year ago.

Are these manufactured glulam beams?

Customer: replied 1 year ago.
thanks.
Expert:  StructuralEng replied 1 year ago.

There should be a stamp on them.

Customer: replied 1 year ago.
No stamp, salvaged from at least a 25 year old building. Don't know the grade of "2x4's" used , but it is pine and not very hard. If that helps. Six layers thick.
Expert:  StructuralEng replied 1 year ago.

What I can do for this question is estimate the allowable bending stress and modulus of elasticity of the beams.

Expert:  StructuralEng replied 1 year ago.

Is that reasonable?

Customer: replied 1 year ago.
An estimate would be helpful. Guys at permit place said they needed: size, grade, specks on the roof support beams.Estimate would be more than I know now. Thanks.
Expert:  StructuralEng replied 1 year ago.

Give me a couple days to look into these.

Customer: replied 1 year ago.
Sure thing.
Expert:  StructuralEng replied 1 year ago.

Thank you

Expert:  StructuralEng replied 1 year ago.

I would use no higher than a Fb = 1600 psi and E = 1300 ksi.

Customer: replied 1 year ago.
Thanks again. Could you explain what that means?
Expert:  StructuralEng replied 1 year ago.

GB is the basic allowable bending stress. E is the modulus of elasticity.

Customer: replied 1 year ago.
Sorry, that might be the info. that code people need, but I still need to know if i can span 19' ? I'll send another drawing.
Expert:  StructuralEng replied 1 year ago.

What exactly do you need? A yes or no? Calculations?

Customer: replied 1 year ago.
Just wanted to see if , per. the minimum spec's , if i should be able to span the 19' with the beam , with the configuration of the braces that will hold up roof and skylight? I will be using foam for roof covering.
Customer: replied 1 year ago.
Never got an answer.Would have liked to have received an answer in plain terms, i just want to please codes. Also, looking back at 1 Nov. 11:32 post fb=1600pst? what is that? and e=13ksi 3 Nov. 4:32 ? Then your next post said G B instead of F B?

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