Fixing into the end of a concrete block

The_Bullman

I've to fix into the end of concrete blocks. I've tried some 2.5x25mm masonry nails but have had limited success. Half the time the block has broken away.

Fixing is about 15mm from the end of the block.

Would a nail gun be more successful? Air or bullet type?

the_pen_turner

what are you fixing to it.
use screws and plugs

Thespoofer

Concrete screws. I use them all the time in work.
Pre drill your hole ( ours is normally a 5mm diameter), screw home the concrete screw.

No plugs needed and a great grip.

Victor

The_Bullman wrote: »

Fixing into the end of a concrete block

What are the nails meant to hold?

The_Bullman wrote: »

Fixing is about 15mm from the end of the block.

You should probably allow 50mm / the length of the fixing.

the_pen_turner

Thespoofer wrote: »

Concrete screws. I use them all the time in work.
Pre drill your hole ( ours is normally a 5mm diameter), screw home the concrete screw.

No plugs needed and a great grip.

what kind of ones are you using that need a 5mm hole. mine are a 7mm hole

Steve

http://www.timco.co.uk/fasteners-fixings/multi-fix/timco-multi-fix-pan-head

Got a box of these a while back in a wholesaler and am very impressed with them.

No plugs needed, just drill and screw.

5T3PH3N

the_pen_turner wrote: »

what kind of ones are you using that need a 5mm hole. mine are a 7mm hole

We've found that 7mm bits are a bit too loose and 6mm or even a well used 6.5mm can be too tight for concrete screws.
We try to always use a good 6.5mm instead, our problem is finding good 6.5 bits long enough for the 180mm screws

The_Bullman

I should have said what I'm fixing.




Would plugs and screws or the concrete screws have the same problem when drilling with <10mm of block left?

the_pen_turner

5T3PH3N wrote: »

We've found that 7mm bits are a bit too loose and 6mm or even a well used 6.5mm can be too tight for concrete screws.
We try to always use a good 6.5mm instead, our problem is finding good 6.5 bits long enough for the 180mm screws

I use 6 in block , 6.5 with a long screw into block and 7 in stone

the_pen_turner

The_Bullman wrote: »

I should have said what I'm fixing.




Would plugs and screws or the concrete screws have the same problem when drilling with <10mm of block left?

that's not ideal.
screws and plugs or concrete screws would work perfectly
you can get concrete screws that you drill a 4.8mm hole and the screw is small , maybe 5.5 x 50.
ept in Carlow sell them . they are made by dewalt. I have a box of them and they are great

The_Bullman

Thanks for the advice.

I thought that drilling that close to the end of the block would shatter it but it didn't. Plus I angled it towards the middle of the block.

I got the 4.8mm screws but need a bit. my 5mm is leaves them too loose, even in concrete head.