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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7000
Experience:  Structural Engineer
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I want to use a beam for a pergola. No posts in between. The

Customer Question

I want to use a beam for a pergola. No posts in between. The beam will only carry its own weight plus one end of 13 12-foot long joists. No roof sheathing. maybe 1x3 wood straps perpendicular to joists to increase shading.
I was thinking of using alaskan yellow cedar glum beam or a solid beam. I thought of the cedar to eliminate the need for maintenance. But I am not married to using the cedar.
What size beam would I need.
Submitted: 9 months ago.
Category: Structural Engineering
Expert:  StructuralEng replied 9 months ago.
Hello
Expert:  StructuralEng replied 9 months ago.
I can help
Expert:  StructuralEng replied 9 months ago.
What is the city and state so I can consider ice buildup?
Customer: replied 9 months ago.
Redwood City California
Customer: replied 9 months ago.
No snow or ice in my part of country.
Expert:  StructuralEng replied 9 months ago.
How far will the beam span between posts?
Customer: replied 9 months ago.
23.5 feet
Expert:  StructuralEng replied 9 months ago.
5.125" X 13.5" glulam will keep deflection to about 3/4" under a full design load (dead load plus a nominal 10 psf live load)
Customer: replied 9 months ago.
Can I use a solid beam? like either alaskan yellow cedar or douglas fir
Expert:  StructuralEng replied 9 months ago.
it will just be larger
Customer: replied 9 months ago.
can us advise me an sizing for the solid beam.
Expert:  StructuralEng replied 9 months ago.
For Doug-fir no. 2 pressure treated, you'll need a 6x14
Customer: replied 9 months ago.
Thanks, ***** ***** good day.
Expert:  StructuralEng replied 9 months ago.
No problem. I'm happy to help. Good luck with your project

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