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I am looking at fixing a TV to a brick wall.
It's an older plasma with a glass protective screen cover, so it's pretty heavy. With the bracket, it must be a total of about 50kg.
I have some 8mm diameter wall plugs, would a few of them cope with it? I have tried googling but no definite answers.
I have tried using shield anchors on previous jobs and never had much success, when I tightened them they just broke the block and were no use at all. Although that was a block wall and not brick.
Any suggestions?
There's a load table on there.
shield anchors on previous jobs and never had much success, when I tightened them they just broke the block
Wrong tool for the job, fischer (other brands are available) have a long list of fixings for different materials etc.
Get some resin anchors & resin from Hilti or Fischer.
Should be fine. They can take a surprisingly large amount of load.
The important thing to consider is whether the load is acting straight down or there is a force trying to pull the fixing forwards out of the wall. If the load is downwards then a nail will do the job. But if I'm fitting shelves I use Fischer Duopower plugs. 8mm should be fine.
Those Fischer UX plugs are great. I have a good stash of 8 & 10's for a variety of jobs. They work really well in brick, concrete, stone and plasterboard.
For your use in brick I'd get them in 10mm x 60 and use a few, maybe 4 with an appropriate sized screw. Chemical resin anchors are a bit overkill for this... unless your wall is crap and you need to embed the anchors 200mm.
For reference, shield anchors are next to useless IMO in any applications. Through bolts are much better & far more reliable for their intended uses.
Thanks for your help.
Well I have gone for a mix of good quality 6mm Fischer plugs with 5mm screws and 8mm with 6mm screws. Got a really good grip.
Hope the TV stays on the wall.
That video of the test was very interesting but not really representative of the diagonal force that is pulling on a wall bracket in real life.
That video of the test was very interesting but not really representative of the diagonal force that is pulling on a wall bracket in real life.
It seemed an odd choice to use the same size screw in each plug too - seems obvious that the same size screw in a larger plug would pull out easier Surely he should have gone for sizes that filled each plug by the same/similar percentage.
Shield anchors are useful when you dont manage to drill a clean hole, by which i mean the diameter is much greater than you intended to drill.
As they expand pretty much over their entire length you get a better hold in the substrate.
Through bolts only open at the end, thus not fully engaging the bolt with the hole.
FTW though i generally use concrete screws (up to M16) or stud and resin ( cos thats what i keep in stock) 😉