Weight which can be supported by plaster board?

[Harry Bloomfield]

Ceiling roses, have the cable entry, offset to the side of the base - which means if the cables come down the side of a joist, the rose can be fixed with both screws into the joist. On the rare occasions, when I'm involved with ceiling roses, I insist on aiming for the above, or I might compromise with one screw plus one into PB, rather than make a mess of the ceiling, or add some timber above the ceiling to screw into. I'm not too bothered about smoke detectors, they are very light-weight, so just screws into the PB.

The worst fixing I ever made in this house, was the through the wall bathroom extractor fan. It went in an existing through the wall vent, from when the house was built, and there was nothing behind it the fix to, just modern plaster, from when the place was replastered. Rather than make a mess, cutting plater out, and bricking around the hole, I simply glued the fan case in place, with sticks like ****.

 

[ericmark]

I would accept most ceiling lamps are less than 1 kg, and in the main, the ceiling rose could be supported by the plaster board without any real problem. A Google for "plaster board ceiling weight limits" gets the result "Single plasterboard: Can support 15 kg per square meter" and the plastic device shown covers less than 1/3 of a square meter.

However, in the main down to how the plaster board is fixed to start with, I have seen walking on the floor above has resulted in the nail heads showing on the board below, the question is, if the fitting were to fall, who would be to blame?
1) The person who put the weight on the ceiling boards.
2) The designer of the device which can't take the weight.
3) The plasterer for fitting boards, not able to take the weight.
I would say the company who marketed a substandard device. The weight has been in BS7671 for some time, so any ceiling rose fixing device must be able to take 5 Kg.

 

[JohnW2]

.... the question is, if the fitting were to fall, who would be to blame?

As I often observe, I personally find it rather sad that we hear so much about "blame" these days, particularly from some people.

Somewhat contradicting that, if we want to 'blame' someone for this 'evolution' of attitudes to things going wrong, I suspect that lawyers have got a fair bit to answer for

 

[SUNRAY]

As I often observe, I personally find it rather sad that we hear so much about "blame" these days, particularly from some people.

Somewhat contradicting that, if we want to 'blame' someone for this 'evolution' of attitudes to things going wrong, I suspect that lawyers have got a fair bit to answer for

Oh your daughter?

I think in this instance it's more a question of who should put it right. In the case of the nightclub I mentioned, the builders and us were there the following day, while the ceiling was down we were able to install some Unistrut for the lights before the new board by the builders. A few days later we fitted the repaired lights to the studs and cables poking through the ceiling. I dare say we cold have argued about the costs but then the builders could have blamed us.

 

[JohnW2]

Oh your daughter?

Amongst other people (both my daughters, in fact)

I think in this instance it's more a question of who should put it right.

Yes, but even that implies that it is some'one "fault" that it needs to be 'put right'. In this case, you might be right, but we so often see attempts to attribute blame when the 'perpetrator' has, in fairly good faith, done something which many/most people would regard as 'reasonable'. In such cases, I think it probably should just be regarded as 'one of those things', without any pointing of fingers.

 

[opps]

I have used the Timco zip-fit toggles to fit shelving on plasterboard walls. They are rated up to 30kg on single skinned plasterboard, 47kg on 25mm double skinned PB.

I used them after the Interset fittings started to fail, to be fair, I hadn't realised that the walls were double skinned and my Interset fittings were designed for 12.5mm.

 

[SUNRAY]

I have used the Timco zip-fit toggles to fit shelving on plasterboard walls. They are rated up to 30kg on single skinned plasterboard, 47kg on 25mm double skinned PB.

Toggles are my favourite as they are a secure clamp and don't usually need too much depth behind.

I used them after the Interset fittings started to fail, to be fair, I hadn't realised that the walls were double skinned and my Interset fittings were designed for 12.5mm.

Intersets are good but I've found them to be less reliable than toggles and there is no way of knowing what has happened behind the board, it is essential exactly the right size is used for the thickness and for that matter exactly the right size hole too.

I've known the 'fingers' snap, also twisted round as the screw is tightened which chewed away at the rear of the PB, (hopefully only when fitted incorrectly?).

One contractor we used had no idea there is a proper tool and he set them using a cordless drill making a right mess into the bargain.

These are good too but require a bigger hole and more depth behind (and expensive)https://www.toolfixservices.com/Pro...vy-Duty-Plasterboard-Fixings-Toggler/TOG25030

 

[EFLImpudence]

Intersets are good

What a strange name for a hollow wall anchor; however did that come about?

 

[SUNRAY]

What a strange name for a hollow wall anchor; however did that come about?

I could ask the same silly question about many products such as Unistrut.

However in the case of Interset I'd have thought it's fairly obvious.

 

[EFLImpudence]

I could ask the same silly question about many products such as Unistrut.

You could - and I have.

However in the case of Interset I'd have thought it's fairly obvious.

Not to me it isn't?

 

[SUNRAY]

You could - and I have.


Not to me it isn't?

For all I know it could have been Ian Nigel Terset who invented them but having no relationship with the inventor or manufacturer I have no clue if that is the case.

However I'll describe it as a fixing device which is internally set using a setting tool.
Personally when I don't know of something mentioned on a forum I'll find out what it is, either ask the poster or more commonly do an internet search for the product to see if it could be something useful rather than question the name of them.

 

[EFLImpudence]

For all I know it could have been Ian Nigel Terset who invented them but having no relationship with the inventor or manufacturer I have no clue if that is the case.

So no help then.

However I'll describe it as a fixing device which is internally set using a setting tool.

Stretching credibility a little.

Personally when I don't know of something mentioned on a forum I'll find out what it is, either ask the poster or more commonly do an internet search for the product to see if it could be something useful rather than question the name of them.

I did ask the poster.

The internet does not seem to have anywhere recognising it as a noun.


Thanks for your help.

 

[SUNRAY]

So no help then.


Stretching credibility a little.


I did ask the poster.

The internet does not seem to have anywhere recognising it as a noun.


Thanks for your help.

I will help you but first I'll ask a question to help the direction I go: Did you know what an interset fixing is before you made your statement and how it's used?

 

[EFLImpudence]

I will help you but first I'll ask a question to help the direction I go: Did you know what an interset fixing is before you made your statement and how it's used?

I had never heard the term before I read your post.
I Googled the word - nothing relevant.
I Googled 'interset fixings' and it showed a site which led to me discovering they were hollow wall anchors.

That prompted my perfectly reasonable question:

What a strange name for a hollow wall anchor; however did that come about?

Even if I had heard the term before and knew all about them, my question is still valid.


Do people know what you mean when you tell them you will interset their light to the ceiling?

 

[JohnW2]

While I agree with much of what you've said about the name of this product, when you write ....

Do people know what you mean when you tell them you will interset their light to the ceiling?

... I am inclined to ask you whether people (in general) would know what you meant if you told them, for example, that you were going to extend a bit of their wiring "using Wagos".