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StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6806
Experience:  Structural Engineer
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A Pergola with one end of my beams attached to a ledger

Customer Question

I am Building a Pergola with one end of my beams attached to a ledger board at the house. the beam span from house to post is Just under 18'. I do not want an intermediate post for this span. the span between my beams will be under 10', I plan to use 2x8 cedar 2' OC for these spans. I would like to use cedar for my beams, what can I use for my beams. to accomplish the 18' span?
Submitted: 5 months ago.
Category: Structural Engineering
Expert:  StructuralEng replied 5 months ago.
Hello
Expert:  StructuralEng replied 5 months ago.
I can help
Customer: replied 5 months ago.
please
Expert:  StructuralEng replied 5 months ago.
I will size the beam to span the 18', but those connections to the house will be critical.
What is the city and state so I can look at atmospheric icing?
Customer: replied 5 months ago.
I am in Edmonton Alberta, Canada.
Expert:  StructuralEng replied 5 months ago.
It will be an open pergola? Not covered?
Customer: replied 5 months ago.
I have 2x6 shade boards 1' OC. The connection at the post is; beam post beam with carriage bolts
Expert:  StructuralEng replied 5 months ago.
I meant the beam to the ledge board on the house
Expert:  StructuralEng replied 5 months ago.
You can plan for a 6x14 cedar beam
Customer: replied 5 months ago.
It is open not covered. With the Beam Post Beam Connection, can I go with 2 smaller beams?
Expert:  StructuralEng replied 5 months ago.
If the beam has joists on both sides I will need the 6x14. If joists are on one side only, then a 6x12 will do
Customer: replied 5 months ago.
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Customer: replied 5 months ago.
I Have 2 beams running parallel with the post in-between do I need to go 6x12 for each beam? Could i go solid 3x12 for each beam?
Expert:  StructuralEng replied 5 months ago.
it's only two beams 1' apart?
Expert:  StructuralEng replied 5 months ago.
10'
Expert:  StructuralEng replied 5 months ago.
You will need two 6x12 for that to span 18'
Customer: replied 5 months ago.
The beams are 8" apart (post size) with two beams per post, carriage bolted on either side of the post. the joists run 24" OC on one side only.
Expert:  StructuralEng replied 5 months ago.
Then two 3x12 at each post
Customer: replied 5 months ago.
thank you
Expert:  StructuralEng replied 5 months ago.
No problem. I'm happy to help. Good luck with your project

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