"dennis@home" wrote in message
...
On 17/03/2019 15:53, Jac Brown wrote:


"Mathew Newton" wrote in message
...
I need to affix some insulated plasterboard to the underside of an IG
Extra Heavy Duty steel lintel:

https://iglintels.com/wp-content/upl...heavy_duty.jpg
http://www.newtonnet.co.uk/permanent/lintel.jpg

My plan was to glue and screw it in place, using Fischer UX plugs into
the aerated concrete blocks above. I therefore need to drill a few 6mm
holes through the lintel and was wondering how easy this will be?

The main reason I ask is that I've always found drilling metal hard
work, but then all my metal drill bits are those which either came with
drills or assorted bit sets. I'm sure in both cases they're the cheapest
of the cheap.

Ought something like this suffice?

https://www.screwfix.com/p/bosch-str...6-x-93mm/239fv

Problem is that that situation, you'll blunt the drill with the first
hole you
drill when you go through the lintel into the aerated concrete blocks
above it. So you will need to sharpen the drill after each hole is
drilled.

Better to glue the insulated plasterboard to the lintel with a decent
glue.

Any other tips?


You need a hilti gun and some ammo.
They will nail into RSJs with the correct ammo.

Can't see that being viable, getting the right amount of
the nail sticking out of the lintel. Those nails rely on the
head stopping it going into the lintel and the plasterboard/
insulation composite isnt going to stop the head.

Glue would be much more practical.

https://www.youtube.com/watch?v=6IHyA4knBpc
video showing gun firing "nails" into steel.