Bespoke wall Tie/Bracket

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DrewRobbo

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Alright everyone,

has anyone here seen this sort of wall tie/bracket before? it has been specified in a job we are taking on by a previous contractor but have never actually used one! is it a custom made component? it is upporting and independent scaffold spurred from a wall, so the legs will not be going to ground. the bracket will be used every 3 lifts.

any help info you guys have will be greatly appreciated!

cheers,

Drew
 

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welcome Drew
i have never seen this bracket in 31 years of scaffolding , it must be a custom made piece for the job. Is there calculations with it ? what sort of an imposed load is the bracket subject to ? and what is the material the bracket is drilled into ? and what are you using as anchors ? :)
 
yeh thats an inhouse design by the look of it , appollo and a.d.i possibly may do a similar product
 
I have seen two companies use them but they have had them made for themselves
 
Just had a look through the Apollo brochure and there is lots similar but nothing exact. Looks like a specialist bit of kit to me. Is it fixed in the normal way or resin injected?
 
aom said:
Just had a look through the Apollo brochure and there is lots similar but nothing exact. Looks like a specialist bit of kit to me. Is it fixed in the normal way or resin injected?
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We use a similar system.

M12 excalibur bolts driven directly into a superstructure have a SWL of 20kN in shear.

As long as the bolts are inserted correctly then the structure you're tying into would probably fail before the bolts do.

Our test certs show the ultimate failure of a single M12 excalibur in shear between 61, 76 & 81kN.
 
phil do you know what sort of a pull you could expect from excalibur bolts in brickwork and concrete ?
 
philliosmaximus said:
phil do you know what sort of a pull you could expect from excalibur bolts in brickwork and concrete ?
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Ultimate tensile load failure 54, 60 & 70kN.

You'd need to factor the weight of the brickwork above your tie to calculate the SWL.

Concrete should fail before the bolt does.
 
How many times are you using the bolts and are they recorded. I'm only asking as it's one of the reasons I am now using the scaff raw plug, don't think it's any use for shear but most jobs don't need it.
 
aom said:
How many times are you using the bolts and are they recorded. I'm only asking as it's one of the reasons I am now using the scaff raw plug, don't think it's any use for shear but most jobs don't need it.
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Are you using the apollo M8 ring bolt?

If inserted correctly then excalibur's should be ok to use again. In practice though, we usually use a fresh bolt for every tie.
 
the reason i ask aom is i seem to struggle getting a good tie with them in brickwork and your right they do seem to wear quite quick.
How do you find them plugs aom i haven't tried them yet ? how do you fix them to the scaffold, do you use a five foot tube with a bit of steel bar welded on the end
 
Back soon phill will fill you in then.
 
philliosmaximus said:
the reason i ask aom is i seem to struggle getting a good tie with them in brickwork and your right they do seem to wear quite quick.
How do you find them plugs aom i haven't tried them yet ? how do you fix them to the scaffold, do you use a five foot tube with a bit of steel bar welded on the end
Click to expand...

Apollo do a hook tie. Basically a half-coupler with a hook end that swivels on the coupler. I find rawplugs and screw bolts quick and effective for 'lighter' works. Much quicker than excaliburs or M16 hilti's - and good in soft brickwork (must drill into the mortar joint)
 
phil181 said:
Are you using the apollo M8 ring bolt?

If inserted correctly then excalibur's should be ok to use again. In practice though, we usually use a fresh bolt for every tie.
Click to expand...

philliosmaximus said:
the reason i ask aom is i seem to struggle getting a good tie with them in brickwork and your right they do seem to wear quite quick.
How do you find them plugs aom i haven't tried them yet ? how do you fix them to the scaffold, do you use a five foot tube with a bit of steel bar welded on the end
Click to expand...

Phil181, We started using them in conjunction with the Leach's tie bracket, a moment of weakness I'm afraid. We seemed to get on well in brickwork although the brick was solid as opposed to the engineering brick with the 3 holes in it. Stone was a total nightmare though and struggled like hell to do them up, admittedly I have since learned a torque wrench would have solved the problem.

Philliosmaximus, we trialled the plugs in stone work that was condemned and the scaffold was tied using through ties and buttressing. We tested the couple of ties we had and found we couldn't budge them. We are now using them all the time in brick and stone and whilst they might not do for shear they can cope with the demands for a heavy duty tie capacity no problem at all.
 
I take it the bracket has been tested? It's not really that much different to the 90 degree angled bracket we use sometimes, only the bottom tube has to hit the wall to transfer some of the load. Just wondering if there's any danger of the tube shearing
 
Tie bracket supplied with calcs, not sure what you mean by the tie tube shearing? Right angled bracket bolted to wall, tube fitted to half back double welded to bracket and tied back to 2 standards with doubles. You can check them but I don't as it's usually light duty ties is all I'm looking for. Can't see that lot shear, but could be wrong.
 
aom said:
Tie bracket supplied with calcs, not sure what you mean by the tie tube shearing? Right angled bracket bolted to wall, tube fitted to half back double welded to bracket and tied back to 2 standards with doubles. You can check them but I don't as it's usually light duty ties is all I'm looking for. Can't see that lot shear, but could be wrong.
Click to expand...

Looking at the diagram posted by the OP mate. Never used it myself but from what I can see it's two tubes welded to a plate that is fixed to the wall using excalibur bolts or similar? If so the bottom tube protruding from the plate will be carrying most of the load. Just wondered what the shear load on that was.
 
Sorry Bundy, I assumed you were referring to my tie set up.:embarrest:
 
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