Attaching 3m door frame to RSJ

[robbieee]

Got a set of 3m folding doors. The frame "needs to be attached to substantial timber or lintel".
Above it is a double layer of PB and an RSJ. Should I attach the frame to the RSJ? If so, how would I do this? Self tapper screw? If so, can you post a link from screwfix? I wouldn't even know what length or size!!

Help would be very much appreciated!

 

[noseall]

Why is there plasterboard attached to the steel beam?

You will need to pre-drill the steel beam in order to use a self tapper. Get a quality HSS bit. It will take effort but it is doable. The hardest part is keeping the pressure on whilst holding the drill steady and avoiding rounding out the hole through the door frame and making it too 'baggy'.

 

[pinenot]

Don't know about Screwfix supplying, but your looking for self drilling and tapping screws, long enough to pass through both frame thickness, plasterboard and half inch into steel...pinenot

 

[robbieee]

Hi all, I am revising this again as it needs done this week.

I have looked for long self tapping screws but no luck. What drill bit would I use?

 

[robbieee]

Here is a picture of the doors. Looking for help

At the moment the top frame isn't attached to anything...

Untitled

• robbieee
• 6 Jul 2014
• 1

 

[IJWS15]

One of these should do. Should be something long enough. Counter bore the heads and use several
http://www.screwfix.com/c/screws-nails-fixings/self-drilling-screws/cat840204

 

[robbieee]

What do you mean counter bore the heads? Would i need to drill into the RSJ with a HSS bit first before i use these self tappers?

 

[robbieee]

If i get something like this:

http://www.screwfix.com/p/self-drilling-screws-with-washer-5-5-x-120mm-pack-of-100/95940

what size of HSS bit should i get? 5mm?

 

[pinenot]

These are the screws you require, no counter boring, pre drilling or anything -

Untitled

• pinenot
• 7 Jul 2014
• 1

- I told you about them earlier in my first reply. All that's required is a good enough drill and the correct bit for the screw head, they even countersink themselves...pinenot

 

[robbieee]

like this?

http://www.screwfix.com/p/timco-phi...drilling-screws-100-x-5-5mm-pack-of-100/23473

Most of these screws say its for boring into sheet metal, not full RSJ's.

 

[pinenot]

Correct...pinenot

 

[robbieee]

Thanks for that. And how should i approach the drilling? Fast? apply pressure?

 

[pinenot]

I always drilled fast with a goodly pressure relieving it as the countersinking head dug into the wood...pinenot

 

[robbieee]

I always drilled fast with a goodly pressure relieving it as the countersinking head dug into the wood...pinenot

Its not going into wood, its going into an RSJ. This still suit?

 

[pinenot]

Yes, drilling the wood is very easy, it then holds the drill/screw in position as you drill into the steel whilst applying pressure. Just make sure you get the right length of screw, all materials prior to steel and 12 mm of thread into steel, they work really well...pinenot