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walkereng
walkereng, Consultant
Category: Structural Engineering
Satisfied Customers: 2453
Experience:  Over 30 years of Structural Engineering experience.
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Right now I have a flush 4 ply 2 by 8 beam that has 2 by 8

Customer Question

Right now I have a flush 4 ply 2 by 8 beam that has 2 by 8 joists at one foot on centre hung off both sides. The span from exterior wall to beam on one side is 13 ft. 6 in. And the other side is 9 ft. 6 in. There is a W8x18 steel beam directly under the flush beam in the main floor. There are currently two posts that are assisting the flush beam and bear on the steel beam below. What I would like to do is remove the two posts and place a 3 ply 9 1/4"2.0 Microlam LVL under the flush beam. This would bear on two 4 ply 2x6 posts at either end that bear on the steel below. The span of this new beam would be 15 ft. 6in. My question is will the new 3 ply beam, as described, be sufficient to support the floor above?
Submitted: 7 months ago.
Category: Structural Engineering
Expert:  StructuralEng replied 7 months ago.

Hello

Expert:  StructuralEng replied 7 months ago.

I can help.

Customer: replied 7 months ago.
what do you think?
Expert:  StructuralEng replied 7 months ago.

Will this be supporting a floor only? An attic only? A floor and an attic?

Customer: replied 7 months ago.
Master bedroom above, no waterbed and no supporting of roof
Expert:  StructuralEng replied 7 months ago.

What about attic?

Customer: replied 7 months ago.
No attic roof bears to exterior walls with trusses
Expert:  StructuralEng replied 7 months ago.

So 3 - 1.75" x 9.25" LVL in addition to the 4 - 2x8?

Customer: replied 7 months ago.
Expert:  StructuralEng replied 7 months ago.

Are the 2x8s continuous from one end to the other or are there spliced over the posts? Or elsewhere along the length.?

Customer: replied 7 months ago.
This I'm not sure of until I open the ceiling but according to an old set of prints I have they are continuous
Expert:  StructuralEng replied 7 months ago.

If they are continuous, then you can use 4 - 1.75" x 9.25" 2.0E LVL. Three won't quite work.

Customer: replied 7 months ago.
Thanks for your help!
Expert:  StructuralEng replied 7 months ago.

No problem. I'm happy to help. Good luck with your project.

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