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Want to add ridge support to an old garage roof. Ridge is

Customer Question
21' 2" long 2x6s. All...
want to add ridge support to an old garage roof. Ridge is 21' 2" long 2x6s. All roof rafters & ceiling Joists are 2x6s. Garage width is 14'. Walls are 3 hole concrete block. There is No extra bracing. Rafters set on top of joists. If I was to use one ibeam instead of the 3 2x6s what size ibeam woulD I use?
JA: OK. Is there anything else important you think the Structural Engineer should know?
Customer: Could I remove every other ceiling joist if I add enough ridge support?
Submitted: 3 months ago.Category: Structural Engineering
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Answered in 9 minutes by:
8/18/2017
Structural Engineer: StructuralEng, Consultant replied 3 months ago
StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7,386
Experience: Structural Engineer
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Hello. I can help.
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Customer reply replied 3 months ago
Ok
Customer reply replied 3 months ago
The question was simple enough I think.
Structural Engineer: StructuralEng, Consultant replied 3 months ago
Are you planning to get rid of the joists? And have a cathedral ceiling?
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Customer reply replied 3 months ago
A semi- cathedral every other joist gets removed, if safe with added wood or metal beam.
Customer reply replied 3 months ago
Posts can be added from remaining joists,
If needed.
Structural Engineer: StructuralEng, Consultant replied 3 months ago
All you are going to do is remove every other joist? And that is it?
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Customer reply replied 3 months ago
Ridged Insulation in rafters, yes I guess that would make it a cathedral.
Yes every other one more joists left than taken.
Customer reply replied 3 months ago
I tend to over engineer things, to be safe.
But metal or wood 2x8 21st long.
Customer reply replied 3 months ago
2x8s. 21 feet long. How many?
I was thinking 3. Or metal what size?
Customer reply replied 3 months ago
Hello!
Customer reply replied 3 months ago
Oh, I forgot the roof has a 4:12 pitch.
Structural Engineer: StructuralEng, Consultant replied 3 months ago
Are the rafters connected to the joists?
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Structural Engineer: StructuralEng, Consultant replied 3 months ago
If so, how?
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Customer reply replied 3 months ago
The rafters are connected to and on top of its joist, the joists are connected to the wall top plate 2x8s. I am adding 2x8s against wall under and flat to all, all the joists, glued and screwed.I would like to ....start at one end peak wall
Leave 1st joist, remove 3, leave 2, remove 3, leave 2, remove 3, leave 1 and other end peak wall.
Or at least every other joist. Both with a ridge beam.
Structural Engineer: StructuralEng, Consultant replied 3 months ago
Can you attach a picture or sketch of how they are attached?
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Customer reply replied 3 months ago
I am trying to get a picture in here but not having any luck.
Customer reply replied 3 months ago
Can I text it, and to where? If so.
Structural Engineer: StructuralEng, Consultant replied 3 months ago
I'm not allowed to post personal contact information. Looks for the paper clip icon here to attach it
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Structural Engineer: StructuralEng, Consultant replied 3 months ago
I see them now. I have a solution that will allow you to remove every other joist without having to do anything to the ridge beam.
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Structural Engineer: StructuralEng, Consultant replied 3 months ago
I will have to submit a premium service offer for it, but should save you a lot of money on replacing the ridge beam
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Structural Engineer: StructuralEng, Consultant replied 3 months ago

I will submit the offer for you to consider. It will include a sketch or two to convey the information.

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Structural Engineer: StructuralEng, Consultant replied 3 months ago

I just submitted the offer. If you accept the offer, I will need a couple hours to do the calculations and get everything together.

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