thrubolt nightmare

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thrubolt nightmare

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themuted
Junior Member

Joined: 11 Oct 2008
Posts: 1

Posted: Sat Oct 11, 2008 4:48 pm Post subject: thrubolt nightmare

Having a bit of a mare trying to get some chunky 12mm thrubolts to take to a solid brick wall... it's all gone somewhat swiss cheesy so far.

I'm using these: http://www.screwfix.com/prods/18740/Fixings/Thrubolts/Thrubolts-12-x-180mm-Drill-Size-12-Max-Fixture-110-Pack-of-10

First, i tried a 12mm bit going in around 80mm - no joy at all. Dropped the bit down to a 10mm and managed to get 1 of them to bite and stay... but now I'm wondering if I'm doing something wrong (drilling in too much or too little) or these are just not suitable for the type of wall...

Any guidance much appreciated...

Ta

Dan

Hitch
Senior Member

Joined: 16 Jan 2006
Posts: 2425
Location: Somerset

Posted: Sat Oct 11, 2008 5:22 pm Post subject:

I assume tghe brick is fairly soft then?
Or is it so hard drilling that the hole has elongated somewhat?

I find resin anchors or sleeve anchors are more reliable in brickwork, theres much more expansion on them than a thrubolt

http://www.screwfix.com/prods/17132/Fixings/Sleeve-Anchors/Sleeve-Anchor-BZP-12-x-100mm-M10-Max-Fixture-51-Pack-of-10
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ultimatehandyman
Site Admin

Joined: 16 Jul 2005
Posts: 9105
Location: Darwen, Lancashire

Posted: Sun Oct 12, 2008 5:15 am Post subject:

Hi Dan,

I have used these in the past and they were really good-

http://www.ultimatehandyman.co.uk/diy/decking/ledger_fixing.htm

Is the hole tight, so that you have to hammer the thru bolts in?
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Steve the Gas
Senior Member

Joined: 30 May 2008
Posts: 439
Location: Notts/Derbys

Posted: Sun Oct 12, 2008 8:53 am Post subject:

Hi, &

IMO you need sleeve anchors,
The fixings that have a collet & wedge design (at the bottom) are NOT suitable for brick at all. scratch

Awaiting any arguments to the contrary Wink

Tryanything
Senior Member

Joined: 18 Aug 2007
Posts: 1300
Location: Essex

Posted: Sun Oct 12, 2008 10:23 am Post subject:

I prefer resin anchors on old brickwork
Thrubolts are only any good on new brickwork or concrete with the right size hole
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Hitch
Senior Member

Joined: 16 Jan 2006
Posts: 2425
Location: Somerset

Posted: Sun Oct 12, 2008 11:46 am Post subject:

If you choose to go the resin route, be careful not to drill through the skin of bricks and into the cavity, or youl need to get some sleeves to suit aswell.

http://www.ultimatehandyman.co.uk/F&F_RESIN_FIXINGS.htm
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