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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6689
Experience:  Structural Engineer
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Looking to make a beam that will span 28 feet. What size

Customer Question

Looking to make a wood beam that will span 28 feet. What size pine lumber should I use?
For instance, 4 pieces of 2" x 12"?
Submitted: 3 months ago.
Category: Structural Engineering
Expert:  StructuralEng replied 3 months ago.
Hello
Expert:  StructuralEng replied 3 months ago.
I can help
Expert:  StructuralEng replied 3 months ago.
What exactly is the beam supporting?
Customer: replied 3 months ago.
I'm supporting the top floor of my barn. Its 22' x 28'. The two bearing walls are approx 22' long each. The floor joists run perpendicular about 28'. The floor joists are three 10' 2" x 10" sister together with one foot overlaps to form a 28" joist.
Customer: replied 3 months ago.
Make sense?
Expert:  StructuralEng replied 3 months ago.
What exactly will the space be used for? Different spaces in a barn have significantly different loading requirements.
Expert:  StructuralEng replied 3 months ago.
are you asking about the joists or a beam?
Customer: replied 3 months ago.
I'm asking about the make up of 2 wooden BEAM to support the second floor. I want to remove the two existing wooden, load bearing walls (see picture I sent) and replace them with two wooden beams. The existing bearing walls are each 22 feet long.
My specific question is what "What would be the thickness and dimensions of a wooden beam that could span the 22 feet with supports only on the ends?" For instance, would four 2"x12" together work?The load for the second floor is 10 dead, 40 live weight. It is used only for old household items, cloths, luggage, etc.
Expert:  StructuralEng replied 3 months ago.
You can plan for a 5.25" X 18" or 7" X 16" 2.0E LVL
Expert:  StructuralEng replied 3 months ago.
As long as there is no ceramic tile
Customer: replied 3 months ago.
No tile is being used. Just curious, is that because of some flex in the beam?Just so I'm clear, these beams would be 7" x 16" x 22', correct?
5.25" X 18" or 7" X 16" 2.0E LVLWhat would I support them on 4x4? 6x6?
Expert:  StructuralEng replied 3 months ago.
Correct. 22' is a long span to support that much. load. You can plan for 6x6 Doug-fir no. 2
Expert:  StructuralEng replied 2 months ago.

Hello. Do you have any other questions for me on this topic? If you could rate my answer, I would appreciate it.

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