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Post by tomplum on Jul 1, 2019 14:37:14 GMT
The purpose of this forum is to give advice and tips to the trade and diy ers to help them along, So its also important to point out things not to do,so never do this, Attachment Deletednotching a joist so deep will compromise the whole house, cut with an hole saw will still be too much, but much better than it is,  |
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Post by rocketmanbkk on Jul 1, 2019 15:02:04 GMT
Yeah, that’s bad.
What’s the best tips if you come across this? And brackets you’d screw in to try & give it more strength?
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Post by endfeed on Jul 1, 2019 16:38:39 GMT
The purpose of this forum is to give advice and tips to the trade and diy ers to help them along, So its also important to point out things not to do,so never do this, View Attachmentnotching a joist so deep will compromise the whole house, cut with an hole saw will still be too much, but much better than it is, sorry about that Tom, I was in a rush to get finished 😇. |
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Post by tomplum on Jul 1, 2019 17:06:45 GMT
things like this occur because wimmin want the pipes hidden at any cost, they do not understand the physics but people let them call the shots, Plumbing is a Mans job and wimmin should have no input, Its the plumbers way or the highway full stop, Rocky there is no way to put the strength back in a timber joint, once its cut to that depth, its fucked,  |
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hmv4u
Full Member
Posts: 145
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Post by hmv4u on Jul 1, 2019 18:14:47 GMT
things like this occur because wimmin want the pipes hidden at any cost, they do not understand the physics but people let them call the shots, Plumbing is a Mans job and wimmin should have no input, Its the plumbers way or the highway full stop, Rocky there is no way to put the strength back in a timber joint, once its cut to that depth, its fucked,  while I'd agree the original joist is badly compromised, wouldn't sistering or bower beams save the day ? |
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Post by rocketmanbkk on Jul 1, 2019 18:17:09 GMT
things like this occur because wimmin want the pipes hidden at any cost, they do not understand the physics but people let them call the shots, Plumbing is a Mans job and wimmin should have no input, Its the plumbers way or the highway full stop, Rocky there is no way to put the strength back in a timber joint, once its cut to that depth, its fucked, while I'd agree the original joist is badly compromised, wouldn't sistering or bower beams save the day ? You’d need to do something. |
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Post by battle1066 on Jul 1, 2019 18:43:15 GMT
Mind I've seen that type of brutal notching done before but to compensate the doubled the joist up at that section.
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Post by cluelesskarl on Jul 1, 2019 18:59:55 GMT
Strangely, I've been meaning to post on how best to notch joists! Not wanting to compromise the structure of my Victorian doss hole, (anymore than a previous owner who knocked a hole big enough to crawl through, in a load bearing wall....  , I was thinking of a length of 75X75 6mm angle iron, with some flat the other side, bolted together, even with holes for the pipes, will be ridged enough. Any thoughts welcome.  |
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Post by tomplum on Jul 1, 2019 19:50:06 GMT
there probably is a way to strengthen by using steel plates or similar, like rocky says, you'd have to do something, perhaps we need a stuctural engineer to come on and educate us, I'll get in touch with bearswood, he must come across this a lot,  |
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Post by battle1066 on Jul 1, 2019 20:00:34 GMT
Strangely, I've been meaning to post on how best to notch joists! Not wanting to compromise the structure of my Victorian doss hole, (anymore than a previous owner who knocked a hole big enough to crawl through, in a load bearing wall.... , I was thinking of a length of 75X75 6mm angle iron, with some flat the other side, bolted together, even with holes for the pipes, will be ridged enough. Any thoughts welcome. Well I feel your above work scope would be a very suitable repair and I could sleep in my bed at night if I left that as my repair. |
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Post by cluelesskarl on Jul 1, 2019 20:23:12 GMT
Thanks Battle! I do subscribe to the "over engineered" bodgery school!  My stainless steel fire basket weighs 67kg....  I was looking at some 20mm hardox plate we have, but thought the necessary accroy's wouldn't be in keeping with the "rustic" theme! |
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Post by crowsfoot on Jul 3, 2019 6:15:43 GMT
I was once called to a DIY installation of a bath (sited on an inside wall) where the idiot had drilled x6 11/2"holes in the joists even putting a fall on them then realised that there was no actual means of actually getting the waste tube between them (well he could have done it with a dozen couplers I suppose )! |
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Post by DIYDafty on Jul 3, 2019 13:26:24 GMT
I was once called to a DIY installation of a bath (sited on an inside wall) where the idiot had drilled x6 11/2"holes in the joists even putting a fall on them then realised that there was no actual means of actually getting the waste tube between them (well he could have done it with a dozen couplers I suppose )! I've never done it for waste (never would I think !) but I thought as long as in the right part of the joist, you're allowed up to a 1/4 of thre depth of the joist. So a 1.5 inch hole would be ok if depth was 6 or greater ? I've run 15mm through 8 inch joists and I think even one or two 22mm but no bigger. |
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Post by endfeed on Jul 3, 2019 17:26:07 GMT
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Post by tomplum on Jul 3, 2019 18:46:50 GMT
holy bearswood brown is the house still standing
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, I was thinking of a length of 75X75 6mm angle iron, with some flat the other side, bolted together, even with holes for the pipes, will be ridged enough. 
My stainless steel fire basket weighs 67kg.... 
