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Old 12-19-2018, 08:36 AM   #16
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Re: What should I use for 25 foot beam?


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Originally Posted by Mark2020 View Post
He want's to put in ceiling joists that will handle the extra 10Psf he is putting on his roof. Those ceiling joists are in a form of what he calls beams. You can put anything together and it will resist the outward forces caused by his extra 10 pounds. He just needs something long enough. LVL's are a great solution, and likely the most cost effective.

Don't forget to put some bolts at each end into rafters... that's what will hold it all together.
Yes! I want two ceiling joists!

Doing this and other projects I have noticed that there is a problem with communication and expressing ideas. I am very thankful that I can talk to you all and sort out the jargon.
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Old 12-19-2018, 08:59 AM   #17
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Re: What should I use for 25 foot beam?


Don't feel bad, many of us (especially me) are trying to sort out the jargon ourselves. I learned long ago to listen carefully at what customers are saying. A gurgle, a thump, or a bang can mean different things to different people, or service persons. But Google and forums (I like this one) have forever changes the world, for the better IMO.

Don't hesitate to ask anything.

Bud
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Old 12-19-2018, 09:20 AM   #18
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Re: What should I use for 25 foot beam?


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It is to bad we don't have enough information to discuss the job at hand but at some point I hope you have an engineer over see this because most of what I have read here has a slim chance of success.
Why? They would be under tension right? I want to bolt them right on the top plate and have whatever is there to not sag over time. I know 25 feet is a lot but they sell Glulam 26 feet long and less than 10" high. That sounds perfect. They even offer different grades for leaving exposed or not.
Is there any reason why I shouldn't use Glulam to span this distance? One lumber store said not to. The LVL looks like stacks of plywood. Aaaaaaaaaaahhh!
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Old 12-19-2018, 10:44 AM   #19
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Re: What should I use for 25 foot beam?


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Why? They would be under tension right? I want to bolt them right on the top plate and have whatever is there to not sag over time. I know 25 feet is a lot but they sell Glulam 26 feet long and less than 10" high. That sounds perfect. They even offer different grades for leaving exposed or not.
Is there any reason why I shouldn't use Glulam to span this distance? One lumber store said not to. The LVL looks like stacks of plywood. Aaaaaaaaaaahhh!
Your biggest concern will be sag. I don't know if they build a curve into the small ones like that., You could put a post in the middle and hang it from the rafters. that would make it a truss with triangles.
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Old 12-19-2018, 11:06 AM   #20
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Re: What should I use for 25 foot beam?


You are right. I am very worried about sag at that distance unsupported. Dropping down from the center is probably going to happen. I'm only going to have about 1 1/2 feet from the top of the beam to the vaulted ceiling anyway.
Nealtw - is that versa lam in that photo? Lumber company wants to sell me versa lam. I called the manufacturer of the glulam I wanted and they said the shipping cost would be more than the beams.

Hey Bud, any glulam manufactures on the east coast?
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Old 12-19-2018, 11:13 AM   #21
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Re: What should I use for 25 foot beam?


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You are right. I am very worried about sag at that distance unsupported. Dropping down from the center is probably going to happen. I'm only going to have about 1 1/2 feet from the top of the beam to the vaulted ceiling anyway.
Nealtw - is that versa lam in that photo? Lumber company wants to sell me versa lam. I called the manufacturer of the glulam I wanted and they said the shipping cost would be more than the beams.

Hey Bud, any glulam manufactures on the east coast?
I would expect the picture to be real timber.


Is the pitch on the roof the same as the pitch of the ceiling?
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Old 12-19-2018, 11:21 AM   #22
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Re: What should I use for 25 foot beam?


I am adding nothing to this conversation other than that my first name is Rob and my last initial is V. I have only ever met one other Rob V in my entire 45 year old life. So you are kind of like a unicorn to me.
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Old 12-19-2018, 11:31 AM   #23
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Re: What should I use for 25 foot beam?


Yes. 3.2/12

Ceiling goes from 7' 6 1/2" up to 9' 5 1/2"

If I set a beam on the top plate that is 11 7/8" tall I'll have less than a foot of clearance. Seems stupid now that I think of it, to try to go unsupported all the way across. I have this window at the gable end that I am trying to not obstruct. I guess it would not be too bad. The beam is going to cut cross the top of that window anyway from this vantage point.
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Old 12-19-2018, 11:33 AM   #24
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Re: What should I use for 25 foot beam?


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I am adding nothing to this conversation other than that my first name is Rob and my last initial is V. I have only ever met one other Rob V in my entire 45 year old life. So you are kind of like a unicorn to me.
I'm 46!
I worked at a pizza place when I was in college. 5 Robs on the schedule so that's what started the RobV thing for me.
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Old 12-19-2018, 11:36 AM   #25
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Re: What should I use for 25 foot beam?


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Originally Posted by RobV4397 View Post
Yes. 3.2/12

Ceiling goes from 7' 6 1/2" up to 9' 5 1/2"

If I set a beam on the top plate that is 11 7/8" tall I'll have less than a foot of clearance. Seems stupid now that I think of it, to try to go unsupported all the way across. I have this window at the gable end that I am trying to not obstruct. I guess it would not be too bad. The beam is going to cut cross the top of that window anyway from this vantage point.
You should have a ridge beam already, have you access to that attic space?
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Old 12-19-2018, 12:07 PM   #26
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Re: What should I use for 25 foot beam?


I have a ridge board. I can access one end of that eve where I can put my hand on the end collar tie. The space between the ridge board and collar tie is very small and filled with insulation.
Part of the renovation of this room will include removing the sheet rock and replacing it with some nice wood. I'm not there in the project yet.
Why do you ask?
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Old 12-19-2018, 12:20 PM   #27
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Re: What should I use for 25 foot beam?


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I have a ridge board. I can access one end of that eve where I can put my hand on the end collar tie. The space between the ridge board and collar tie is very small and filled with insulation.
Part of the renovation of this room will include removing the sheet rock and replacing it with some nice wood. I'm not there in the project yet.
Why do you ask?
When you have a ridge board there is out push pressure on the walls
A ridge beam is supported at the ends and there is no out push pressure on the walls.
A ridge beam is engineered for the load it can take so the next question is whether the beam you have will carry the load you want to add. Or would you just add another similar beam above that for the new roof line.
The header over the window might be added to the question.
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Old 12-19-2018, 12:59 PM   #28
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Re: What should I use for 25 foot beam?


I would consider scissor trusses, no out push on exterior walls and easy to install.
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Old 12-19-2018, 01:05 PM   #29
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Re: What should I use for 25 foot beam?


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Originally Posted by Nealtw View Post
When you have a ridge board there is out push pressure on the walls
A ridge beam is supported at the ends and there is no out push pressure on the walls.
A ridge beam is engineered for the load it can take so the next question is whether the beam you have will carry the load you want to add. Or would you just add another similar beam above that for the new roof line.
The header over the window might be added to the question.
You lost me on adding load to my ridge. I know about ridge beams and I wish I had one. How will adding, what was referred to earlier as ceiling joists, add to the weight supported by the roof when I'm only adding to the top plate of the walls? The ridge will be running perpendicular to the beams I want to add.

If you go back to my old thread: Adding new roof over old to change pitch a little
I found a place to come up to support one end of a ridge beam for my new roof. I have not figured out the other end which would be using the header over the window I am guessing. Don't want to add anything to this old roof because it is not constructed well.
My grandfather was building it when he died. My great uncles finished it the best they could. My neighbor called them "gentlemen carpenters" because they did everything to a point where they could say, "Good enough."
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Old 12-19-2018, 01:22 PM   #30
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Re: What should I use for 25 foot beam?


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You lost me on adding load to my ridge. I know about ridge beams and I wish I had one. How will adding, what was referred to earlier as ceiling joists, add to the weight supported by the roof when I'm only adding to the top plate of the walls? The ridge will be running perpendicular to the beams I want to add.

If you go back to my old thread: Adding new roof over old to change pitch a little
I found a place to come up to support one end of a ridge beam for my new roof. I have not figured out the other end which would be using the header over the window I am guessing. Don't want to add anything to this old roof because it is not constructed well.
My grandfather was building it when he died. My great uncles finished it the best they could. My neighbor called them "gentlemen carpenters" because they did everything to a point where they could say, "Good enough."
I did not realize we had talked about this before. We talked before about building the wall up that is between the two rooms. I truss company could build you a truss with the two points of bearing over the outside wall and the built up wall and add virtually no weight to the roof over the bigger room. I will see if I can find a picture
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