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I have a 17 foot opening on outside wall weight bearing roof

single story room with 20...
I have a 17 foot opening on outside wall weight bearing roof single story room with 20 ft ceiling
JA: OK. Tell me a bit more about what's going on so we can help you best.
Customer: this opening supports 7 panels of a bifold door system and 1 pass through door
JA: Is there anything else the Structural Engineer should be aware of?
Customer: it is floor bearing weight system but doors have been difficult to open- they open out the header beam is 5 1/4 x 11 7/8 but I have measured a sag my f about 1/2 ". Do I need to reinforce beam or create bigger size?
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Answered in 13 minutes by:
11/19/2017
StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
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Hello. I can help

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Do you have a ridge beam and rafters or scissor trusses? What is the city and state so I can look at snow loading?

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Customer reply replied 24 days ago
No snow loading
San Juan Capistrano Californa
I️ believe scissor trusses for high roof and I️ thank the side jambs help support header

What is the length from ridge to eave?

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Customer reply replied 24 days ago
Edge to wave 10-12’
Customer reply replied 24 days ago
Eave

The beam you have is properly sized for strength and typical deflection limits. The bifold doors likely require a more strict deflection criteria. The bifold doors I've worked with typically have a deflection limit of L/720 or 1/4", whichever is less. So you will need to reinforce the beam, and you'll want to jack it back to level before reinforcing it.

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Customer reply replied 24 days ago
The deflection allowed is 1/4" Do I need to have beam reinforced with steel or plywood?

Were you given that criteria? Of 1/4"?

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Customer reply replied 24 days ago
Looked it up in their installation PDF on line

You will need to reinforce with steel.

StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7,419
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Customer reply replied 24 days ago
Okay thank you for clarifying for me

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

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