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Old 03-28-2013, 08:00 PM   #1
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coffered ceiling used for support


I have 3 ceiling/floor joists that were severely cut by plumber (second floor bathroom) not enough space to sister repair or cut and block support so my thought is to build a coffered ceiling under using beams constructed with dbl. 2x8 plus strand board center using extra heavy hangers at ends dividing the ceiling into 4ftx8ft panels thus shortening the joist span to 4 ft. does anyone have a better idea or comment on whether this will work or not
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Old 03-28-2013, 08:10 PM   #2
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coffered ceiling used for support


got a sketch in section? what's the span of the beams?
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Old 03-28-2013, 08:30 PM   #3
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coffered ceiling used for support


there would be ledger around room with one beam crossing ceiling at center of the length span 14 ft. with the 2 other on each side with 8 ft. span the room is 14x16 the grid would be 6 blocks of 4ftx8ft
the 14 ft span will be parallel directly under a dbl joist beam and would be attached to it with hangers also considered sistering the three bad joists as far as i can t help distribute load

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Old 03-28-2013, 09:58 PM   #4
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coffered ceiling used for support


Sure would be nice to see a picture to see why you think this can not be fixed right.
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Old 03-28-2013, 10:18 PM   #5
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coffered ceiling used for support


I agree with Joe. Maybe what you have is not too bad, especially if the cuts are in the top of the joists. If they are, that can be fixed, as the top is in compression. The bottom is in tension.
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Old 03-29-2013, 10:12 AM   #6
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coffered ceiling used for support


I have been ill for last couple days will try to get photos soon.
there are all kinds of obstructions in this area I.E. gas lines water lines and the waste lines that are causing the problem.
the upper floor is occupied by tenants as well.
so all work now taking place from 1st floor.
i also considered adding steel angle iron reinforcement under the 3 joists in question scabbed on with bolts.
1 of them only has abut 2-2 and half inches of material remaining.
the beams i mentioned before would be crossing the existing joists
will also be strapping the joists with 2x4 or 2x6 to true up before drywall goes up
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