Sleeve Anchor fittings

[Lonsdale73]

Never used them before I've just bought some of the above to fit a heavy extractor to breeze block wall. The label on the back suggests drilling a hole 40mm deep, allowing a maximum fixture thickness of 35mm. My fixture is no more than 2mm which would leave the bold some 33mm proud. Can I take it that quoted 40mm is a minimum depth required and I'll not be reducing the effectiveness of the bolt by drilling deeper?

 

[MikeJhn]

If this is the expanding sleeve type the best place for them is the bin, unless the hole is undreamed it will slide on the dust inside the breeze block, the only way to use them effectively is to drill with a rotary percussive air flush bit, far better to use a resin anchor IMO.

To justify this, on the Trafalgar Place Brighton (six blocks of office's and a block of flats) project they where used to fix SS angle to the concrete slabs to support the brickwork facade every one of them failed and caused cracking to the brickwork, they numbered in the thousands so not an isolated case, the upshot was the Architectural practice that specified them named with a Sir at the front closed rather than face the consequence's of the claim against them, having this first hand knowledge of this I would never use them on anything for myself.

Mike

 

[TFrench]

If its the soft thermalite blocks I'd use a frame fixing - like mike says, the expansion of the sleeve will crack the block. If its proper concrete blocks they'll be fine.

 

[sunnybob]

Rawl bolts (as was before the patent ran out);
http://www.ebay.co.uk/itm/Loose-Bolt-Sh ... 1383677400

are extremely effective in solid concrete or brick, or even old fashioned heavy breeze blocks.
I've just used them in poured stamped concrete to fix a pergola in place.

They are no good whatsoever in thermailte or other lightweight blocks, except for very light weight jobs.

 

[Lonsdale73]

I bought these: http://www.screwfix.com/p/easyfix-sleeve-anchor-12-x-75mm-m10-10-pack/12838

 

[pcb1962]

I always buy Fischer fixings, never had a problem with them in brick or concrete block.

 

[powertools]

If they are thermalite blocks don't waste your time trying fix it no matter what fixings you buy the blocks won't be strong enough to hold a heavy weight.

 

[TFrench]

If they are thermalite blocks don't waste your time trying fix it no matter what fixings you buy the blocks won't be strong enough to hold a heavy weight.

I've got a big rack for my lathe chisels hanging on mine with no problems. Plenty of frame fixings into as many different blocks as possible, and don't go mad overtightening them. Simples.

 

[powertools]

Fair play to you but i doubt your tools weigh as much as an extractor and probably don't vibrate.

 

[MikeJhn]

Never used them before I've just bought some of the above to fit a heavy extractor to breeze block wall. The label on the back suggests drilling a hole 40mm deep, allowing a maximum fixture thickness of 35mm. My fixture is no more than 2mm which would leave the bold some 33mm proud. Can I take it that quoted 40mm is a minimum depth required and I'll not be reducing the effectiveness of the bolt by drilling deeper?

Just a thought, if you can get to the other side of the wall, then drill right through the breeze blocks and bolt the extractor to some angle iron on the other side of the wall running vertically or horizontally overlapping at least four blocks, that may do it, but only if the block laying is good and they are at least 100mm thick, alternatively use the angle iron to make a frame and support the extractor from the floor, another thought, hang the extractor from the roof.

Mike

 

[Lonsdale73]

Never used them before I've just bought some of the above to fit a heavy extractor to breeze block wall. The label on the back suggests drilling a hole 40mm deep, allowing a maximum fixture thickness of 35mm. My fixture is no more than 2mm which would leave the bold some 33mm proud. Can I take it that quoted 40mm is a minimum depth required and I'll not be reducing the effectiveness of the bolt by drilling deeper?

Just a thought, if you can get to the other side of the wall, then drill right through the breeze blocks and bolt the extractor to some angle iron on the other side of the wall running vertically or horizontally overlapping at least four blocks, that may do it, but only if the block laying is good and they are at least 100mm thick, alternatively use the angle iron to make a frame and support the extractor from the floor, another thought, hang the extractor from the roof.

Mike

Been busy last few days doing actual work but got back on to it today. I took your advice and ditched the sleeve and anchor thingies. My garage has a pitched roof so I figured if I mounted the fan on to a sheet of timber I could then screw this into (barge?) board that supports the rafters. I secured a series of battens down and across the wall to give me more places to screw in to. Thing was bl**dy heavy and being on the short side I struggled to lift it into position and hold it in place while driving home the screws. Damn near join the Darwin Awards in the process so I bought a cheap chain pulley, used a lifting strap to secure that to the rafters (almost) directly above the fan's final position and effortlessly hoisted it into position. Twenty-five 50mm screws later I think it's secured. Hope they don't prove to be famous last words!

 

[user22161]

If they are thermalite blocks don't waste your time trying fix it no matter what fixings you buy the blocks won't be strong enough to hold a heavy weight.

Tens of thousands of houses (including 3 of mine) were built using Thermalite or Celcon block. Never heard of kitchen units full of crockery or gas boilers falling off the walls.