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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7185
Experience:  Structural Engineer
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Need help sizing a ridge beam. 20 x 24 ft building. The

Customer Question

Need help sizing a ridge beam. for a 20 x 24 ft building.
The beam would be in the 24 ft direction
City = breckenridge colorado - Snow load 90 lbs/sqft
Submitted: 2 years ago.
Category: Structural Engineering
Customer: replied 2 years ago.
Trying to determine the LVL size (and number), my local lumber yard uses Georgia pacific products.
I've done the calculation myself - but I want to see how close I got and want a 2nd opinion. Rafters will be 24" on center. Normal roofing shingles 6/12 pitch
Expert:  StructuralEng replied 2 years ago.
Hello. I'll be happy to assist you.
Expert:  StructuralEng replied 2 years ago.
I presume this is for a vaulted ceiling?
Expert:  StructuralEng replied 2 years ago.
You can get away with a 7"x18" 2.0E LVL for strength and L/240 deflection, but you want to minimize the deflection of the ridge or you have a big risk of cracking interior finishes from the thrust of the rafters on the walls due to vertical deflection of the ridge. I recommend a 7" x 24" 2.0 E LVL to keep deflection at L/600.
Customer: replied 2 years ago.
How does it help if I have a column at 14' (I can put a bearing column at that point because it matches with a wall) - yes vaulted ceiling. I calculated in this case 6" x 18" (which would be 3 LVL's sandwiched together). Yes assuming L/240
Expert:  StructuralEng replied 2 years ago.
That makes a very big difference
Expert:  StructuralEng replied 2 years ago.
That gets you down to a 5.25" x 16"
Expert:  StructuralEng replied 2 years 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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