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Coring on non RC Wall, is there a safety gap to follow ?
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TSPain4UrsinZ
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May 12 2021, 08:38 PM, updated 5y ago
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i asked my contractor to do 7 inch coring for kitchen hood ducting, end up he leave a gap of 5 inch from the ceiling then + 7 inch coring,
so my plaster ceiling have to be 14inch which is out from my plan to keep the plaster ceiling height at 10 inch.
why did he leave a 5 inch from the ceiling? due to machine the contractor used or for safety ?
my contractor didn't explain much, he just said it was done according to coring expert advice.
This post has been edited by Pain4UrsinZ: May 12 2021, 09:17 PM
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bobowyc
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May 12 2021, 08:43 PM
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Landed or high rise?
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johnlpy
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May 12 2021, 08:43 PM
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New Member
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Could be due to the load bearing beam
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TSPain4UrsinZ
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May 12 2021, 08:58 PM
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QUOTE(bobowyc @ May 12 2021, 08:43 PM) high rise apartment.
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Nother
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May 12 2021, 09:00 PM
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Getting Started

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Should not core an RC wall, but presumably he did it due to beam location.
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TSPain4UrsinZ
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May 12 2021, 09:16 PM
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QUOTE(Nother @ May 12 2021, 09:00 PM) Should not core an RC wall, but presumably he did it due to beam location. sorry, after checking , it is not RC wall
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SUSceo684
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May 12 2021, 09:25 PM
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QUOTE(Pain4UrsinZ @ May 12 2021, 09:16 PM) sorry, after checking , it is not RC wall If not load bearing technically no issue..my management office say i can even drill a watermelon sized hole in non structural wall. Is your contractor armed w all the drawing/plan for ur unit? If there is no beam in the location ie all brickwall it makes no diff. This post has been edited by ceo684: May 12 2021, 09:27 PM
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Nother
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May 12 2021, 11:08 PM
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Getting Started

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If not an RC wall then coring at any level should be fine. Usually the hole will be at least 1 feet above the level of the cooker hood. Then you can cover with your hanging cabinets; extended to full height.
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iamsobloodysick
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Feb 3 2022, 11:15 AM
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I need to core 2 6-inch holes on the balcony wall for fresh air system ducting. It took the project team 3 weeks to reply in a letter that there’s a beam there hence coring isn’t allowed. At least 3/4 of the wall is sliding doors so I’m assuming it’s not load bearing. I wonder if I can core lower to avoid the beam and how much lower usually. I’ve sent a follow up enquiry which might take another 3 weeks to hear back.
This post has been edited by iamsobloodysick: Feb 3 2022, 11:17 AM
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mini orchard
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Feb 3 2022, 11:39 AM
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QUOTE(iamsobloodysick @ Feb 3 2022, 11:15 AM) I need to core 2 6-inch holes on the balcony wall for fresh air system ducting. It took the project team 3 weeks to reply in a letter that there’s a beam there hence coring isn’t allowed. At least 3/4 of the wall is sliding doors so I’m assuming it’s not load bearing. I wonder if I can core lower to avoid the beam and how much lower usually. I’ve sent a follow up enquiry which might take another 3 weeks to hear back. How do you intend to counter technical specs and want to take risk ?
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iamsobloodysick
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Feb 3 2022, 11:55 AM
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QUOTE(mini orchard @ Feb 3 2022, 11:39 AM) How do you intend to counter technical specs and want to take risk ? No that’s not my intention. I understand the beam can’t be cored. Can’t we core below it (the non-beam wall)?
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mini orchard
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Feb 3 2022, 12:01 PM
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QUOTE(iamsobloodysick @ Feb 3 2022, 11:55 AM) No that’s not my intention. I understand the beam can’t be cored. Can’t we core below it (the non-beam wall)? Each building is constructed differently. How to advise you other than the project team.
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SUSceo684
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Feb 4 2022, 01:45 AM
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QUOTE(iamsobloodysick @ Feb 3 2022, 11:55 AM) No that’s not my intention. I understand the beam can’t be cored. Can’t we core below it (the non-beam wall)? Thats a usable option, ask MO on the beam sizing
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absolut
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Mar 10 2023, 04:36 PM
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QUOTE(iamsobloodysick @ Feb 3 2022, 11:15 AM) I need to core 2 6-inch holes on the balcony wall for fresh air system ducting. It took the project team 3 weeks to reply in a letter that there’s a beam there hence coring isn’t allowed. At least 3/4 of the wall is sliding doors so I’m assuming it’s not load bearing. I wonder if I can core lower to avoid the beam and how much lower usually. I’ve sent a follow up enquiry which might take another 3 weeks to hear back. Have you managed to install the fresh air system ducting?
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