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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6689
Experience:  Structural Engineer
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I bought a 1984 house, in houston texas. Single story. I

Customer Question

I bought a 1984 house, in houston texas. Single story. I want to open up the wall between the living room and the kitchen. It will span 25 feet. There is only the attic and roof above. And theres no storage in the attic. What size LVL would I need?
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.

I can help. What is the city and state so I can look at snow loading? What is the joist length on each side of the beam?

Customer: replied 1 year ago.
rosharon, tx, joist length are 16 feet
Customer: replied 1 year ago.
hello?? any other information needed?
Customer: replied 1 year ago.
Still no answer
Expert:  StructuralEng replied 1 year ago.

I apologize for the delay. I was away from my computer. I will provide a size for supporting the attic only and a size for support the attic and roof.

Expert:  StructuralEng replied 1 year ago.

To support the roof and attic with 16' joists on each side and limit deflection to L/280 (about 1"), you need a 7" x 20" 2.2E LVL.

To support just the attic with the same deflection, you need a 5.25" x 18" 2.2E LVL.

Customer: replied 1 year ago.
Would I be better off with a steel beam?
Expert:  StructuralEng replied 1 year ago.

If you're worried about headroom, yes.

Expert:  StructuralEng replied 1 year ago.

For a steel beam, you can plan for a W12x45 ASTM A992 Gr. 50 to support the attic and roof with the same deflection criteria. The beam is 12" deep x 8" wide and weighs 45 pounds per foot.

You will need to detail the joists to brace the beam against lateral torsional buckling.

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