Fixing into Granite.

I have to make a bracket up for a Laser Link between 2 buildings, of which one is a old granite building. The mount will be made of 40mm unistrut. Can anyone recommend a decent fixing to use. This mount need to be rock steady and have no movement at all.

The job has to completed in one day from start to finish, as I am hiring a cherry picker to get up to the height required, and I must be able to get kit locally as it is getting done on Monday.

Resin anchors will take too long to set, before I can align the kit.

What about these?

I have some 8mm threaded rod I need for the other end. I cant seem to find the spit type fixings that are hammered into concrete and then the screwed rod is tightened up .

Reply to
yendor
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Look for 'shield anchor' in the Screwfix site. Hope you have a decent SDS drill - granite is hard. ;-)

Reply to
Dave Plowman (News)

I have seen these:

Can't seem to see what size drill bit to use though. I have a Hilti Te-2 and a few batteries.

Reply to
yendor

On Saturday 08 June 2013 15:35 yendor wrote in uk.d-i-y:

Fischer Vinylester sets in about 10 minutes and full strength in under an hour (when you come back and tweak the bolts up).

Reply to
Tim Watts

I really need to drill, fix and align in one go, as I have a limited time to get this up and running.

Reply to
yendor

pack-of-5/35932>>

Is your 8 mm thread rod to go into the fixing 'cause those ones is 6 mm.

Drill size will probably be 10mm for a 6 mm bolt fixing. Look 'em up on the Fischer site?

Reply to
Dave Liquorice

They cut a thread into granite?

Reply to
Dave Plowman (News)

Usually on the pack. Something like 10mm.

There are lots of makers of these type of fixings - I normally call them RawlBolts since they were one of the first. They take different sizes of bolts etc, so need different drill sizes too.

Dunno that one.

Reply to
Dave Plowman (News)

I would do a test drill somewhere inconspicuous before you get the cherry picker in. It's no joke drilling granite, only the very best diamond drills will touch it & you will likely need water cooling. If you have problems, you may have to drill into a seam. OR Many fixings I have seen into granite have been "built in", ie a block removed and a ragbolt cemented in.

Reply to
harry

car body filler sets in half an hour - faster if you use a shade more catalyst.

Reply to
The Natural Philosopher

I have no problems drilling into granite, its not that bad, it just wears down the bits a bit quicker. I work in Aberdeen("Granite City") a lot, and there is granite everywhere...

Reply to
yendor

On Saturday 08 June 2013 16:10 yendor wrote in uk.d-i-y:

Oh OK. So you cannot drill and loose mount one, go and do the other then come back and tighten and alight the first then second? Is that too much moving of the cherry picker? Otherwise it would probably give you enough time without wasting any.

Reply to
Tim Watts

Its about 750m between locations along a public road, I am starting early to get the work done early to get off the public road.

Reply to
yendor

I live near Malvern. Lots of granite houses there. Never see any attempt been made to dress the stuff, they just use the quarried rubble with brick quions. Very hard stuff. Cheapo diamond drills wont look at it.

Reply to
harry

Obviously only low skilled labour there. Even the oldest houses in Aberdeen used dressed granite, where needed. Probably because of no local brick works.

BTW, an ordinary SDS drills it just fine. A hammer drill, not.

Reply to
Dave Plowman (News)

So how did the job work out?

Reply to
ARW

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