Which bolt to 2x4 timber?

[masscrazy]

Its a stud wall, the timber is actually 95mm by 45mm and that will be covered, not by plasterboard but 12mm of ply, total of 107mm bolting depth.

I will be bolting a TV bracket to the timber. My question is which length and size of bolt should I use?

And what drill bit size for the pilot holes?

Edit - to clarify TV is 27kg and mount is full motion 180 degree cantilever 10kg so bolts

 

[Deleted member 174758]

Bolt? Surely you'd use screws? If you have a plywood pattress or facing to mount to then screws into the ply would suffice. Bolts are complete overkill IMHO

 

[Burnerman]

Bolts?? No need for those......how about 40mm x 5mm wood screws, using a 3mm pilot drill?
John

 

[masscrazy]

Sorry didnt provide any context.

To clarify TV is 27kg will be mounted using a 10kg cantilever bracket.

This is why the need for bolts. I am thinking M8 100mm coach screw. How big does a pilot hole need to be to insert this?

 

[baileysufc]

Bolts are not needed so the total weight is 37 kg ? I wud put nogins in the stud work behind the bracket and use 70or 80 mm screws thrught the ply into the nogin

 

[masscrazy]

Bolts are not needed so the total weight is 37 kg ? I wud put nogins in the stud work behind the bracket and use 70or 80 mm screws thrught the ply into the nogin

Actually that is what I'm doing, noggin top and bottom where the bracket mount holes are and ply on top.

However the bracket is extending out the wall about 24 inches and not static weight. I've been told thats a whole load of weight that requires solid connections, hence the noggins ply and now some bolts.

 

[baileysufc]

I see personal i wudnt not bolt it but if it makes u feel better do it threaded bar all the way throught the ply and stud work with penny washers either side

 

[foxhole]

Ply on timber will be more than man enough to hold the tv, even with bracket, Coach screws will give a secure fix.

 

[masscrazy]

I see personal i wudnt not bolt it but if it makes u feel better do it threaded bar all the way throught the ply and stud work with penny washers either side

The penny washer either side of the ply?

Also i'm going to use 8mm bolts/coach screws at 100mm (2 at 70mm as there will be a notch of 20mm at the back of one noggin to allow for cables to come up from back).

So 8mm bolts 100mm long, what size pilot hole 8mmx100mm same as bolt?