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Old 08-18-2016, 07:38 PM   #1
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Attic crossbeams


I have four or 5 cross beams in the attic that are about 6 half 7 feet high. I would like to raise those. Will it cause damage to the roof if I raise them a foot or two higher?
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Old 08-18-2016, 07:42 PM   #2
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Re: Attic crossbeams


Not a clue without some pictures.
What is it your really trying to do?
The more info, the better the reply's your going to get.
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Old 08-18-2016, 07:43 PM   #3
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Re: Attic crossbeams


Attached is the picture of one.
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Attic crossbeams-img_0121.jpg  
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Old 08-18-2016, 07:53 PM   #4
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Re: Attic crossbeams


This is in the 3rd floor attic in cleveland ohio.
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Old 08-18-2016, 08:00 PM   #5
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Re: Attic crossbeams


Once again why do they need to be higher?
What is it your trying ti do?
https://www.nachi.org/collar-rafter-...adbetadesign=0
Going to make a guess, if your trying to use this area for living or storage space there's a whole lot more involved then just raising them.
https://www.nachi.org/collar-rafter-...adbetadesign=0
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Old 08-18-2016, 08:07 PM   #6
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Re: Attic crossbeams


We are going to make it into a living space. It has electrical and had a finished floor in it that has some floor boards that need replaced. We are going to insulate it and add drywall as well.
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Old 08-18-2016, 08:16 PM   #7
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Re: Attic crossbeams


The first step I would take is talk to my municipality to see if they will permit this space being turned into a living space and, if they will, what requirements they will expect with a building permit.

Those 'crossbeams' are called "collar ties" and are meant to keep the roof from collapsing outward. I don't know if raising them that much will affect their purpose. You may have to get an engineer's report.
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Old 08-18-2016, 08:31 PM   #8
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Re: Attic crossbeams


Whole lot more involved into making this a living space.
There has to be code compliant stairway, egrees windows, highly unlikely there wide enough floor joist.
Still have no location so no idea on how much insulation you would need in that ceiling.
https://energycode.pnl.gov/EnergyCodeReqs/
Soffit and roof venting need to be addressed.
Zoning, heath dept, building dept. need to be contacted.
Going to need building, electrical, insulation inspections.
Common miss conception, you see all this "wasted space" why not use it instead of adding on.
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Old 08-18-2016, 09:01 PM   #9
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Re: Attic crossbeams


The cross beams appear to be collar ties. The purpose of collar ties is to equalize uplift pressure across the roof during high wind events. Collar ties are generally installed about 2/3 of the way between the floor and the peak of the roof, and yours look about right. The walls are kept plumb by the floor joists, which are not visible in your photo. Raising collar ties may be possible, but could trigger the need for framing upgrades. Your building inspector will know if you can do it without major issues.

Converting the space into habitable space is complicated and requires close coordination with your building inspector. Raising a few collar ties is the least of your concerns, as has been mentioned by others. You need a complete plan that addresses issues already mentioned in this thread, including access, emergency egress, windows, roof height, floor strength, insulation, ventilation, and electrical.
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