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Offline Brian Livingstone

  • Posts: 245
Built in Question
« on: February 16, 2023, 01:44 PM »

Hello,

I am building a large built in.  I am using 3/4 ply on the left, right and top.  The depth is say 27 inches.  The width is 10 feet.  I have two 5 foot pieces of 3/4 ply.  Do you think say 4 or 5 6mm dominos will hold the two five foot pieces together while I lift and install on the ceiling ?  There are two vents cut and I could put a Bessey clamp to hold the pieces.  Also, I will have added 1/2 inch edge banding.  I think it should be okay.

There is a 3/8 gap all around and I thought about laminating a 3/8 inch piece of hardwood and using 12 mm doMinos into the what would 1 1/8 inch end.

Once it is in place there won’t be any issue.

Thanks.
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Offline Packard

  • Posts: 2430
Re: Built in Question
« Reply #1 on: February 16, 2023, 03:36 PM »
It is going to get heavy, so a helper is advised.

I would use a third piece of plywood about 2’ x 8’ and place it under the joined pieces.  Lift using the 2’ x 8’ to support the joint. 

Drive in your fasteners and let the 2’ x 8’ piece down. 

A couple of 2” x 8” x 8’ framing lumber would work just as well.

Regardless if it is dominoes or dowels, if you try to lift those joined sheets, there is a good chance you will delaminate the plywood at the joint.

On the second thought, you can rent a scissor lift designed for attaching sheetrock to the ceiling.  I am thinking that is a preferred approach.

« Last Edit: February 16, 2023, 03:38 PM by Packard »
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Offline afish

  • Posts: 1503
Re: Built in Question
« Reply #2 on: February 16, 2023, 03:57 PM »
Is this cabinets or what?  If so its going to be heavy so lots of helpers or lifting devise. Or I would built as 2 pieces or more depending or door layout.  A drawing of what you are building would help.
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Offline Crazyraceguy

  • Posts: 2835
Re: Built in Question
« Reply #3 on: February 19, 2023, 09:26 AM »
By yourself, without a panel lifter, not a chance. The seam will split. With a couple of people and some care, it should be manageable. As you indicated, once installed, it will be fine.
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Offline Coen

  • Posts: 2195
Re: Built in Question
« Reply #4 on: February 24, 2023, 03:08 PM »
Quote from: Packard on February 16, 2023, 03:36 PM


What happened to the vapor barrier film?

Oh, hot climate + AC?
« Last Edit: February 24, 2023, 03:11 PM by Coen »
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