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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6747
Experience:  Structural Engineer
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I am building a structure using 24 feet wide by 48 feet long.

Customer Question

I am building a structure using 24 feet wide by 48 feet long. I plan on using 10x10 posts 18 feet high front and 12 feet high rear with a mono pitch roof system spanning 25 feet. I will use microlam beams attached to the post (front to rear), and will hang 2x10 purlins in hangers between creating 12 foot wide bays. What size micro will i need?
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.
Is this for the roof only or an interior floor?
Customer: replied 1 year ago.
Roof only snow load of 40 lbs
Expert:  StructuralEng replied 1 year ago.
The beams will span 25'? What is the spacing of the beams (or the span of the 2x10s)?
Customer: replied 1 year ago.
beam spacing is 12 feet (creating 4 12 foot wide bays) with purlins 24 " OC, hung with osb and metal roofing above
Expert:  StructuralEng replied 1 year ago.
Thank you. Give me a few minutes to run some numbers
Expert:  StructuralEng replied 1 year ago.
You will need 7" x 20" 2.0E LVL to limit deflection to span/360
Expert:  StructuralEng replied 1 year ago.
span/240 would be a 7" x 18" 1.9E LVL or a 7" x 16" 2.2E LVL
Customer: replied 1 year ago.
span 360 means inches
Expert:  StructuralEng replied 1 year ago.
span/360 is 0.833"span/240 is 1.25"
Customer: replied 1 year ago.
1.25" being deflection
Customer: replied 1 year ago.
thank you
Expert:  StructuralEng replied 1 year ago.
No problem. I'm happy to help. Good luck with your project.

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