Fixings for lighting bar into ceiling above? (50KG load)

eveares · 1 Mar 2015

I need to mount a 2.4 meters long section of 50mm x 25mm mild steel box section into the ceilings joists where it will support about 50kg of disco/stage lights. I also can't easily get above the ceiling due to a room above.

There also needs to be about 100mm between the top of the box section and the ceiling.

The M12 x 250mm coach bolts here: http://www.tradefixdirect.com/screws-accessories/coach-screws/bzp-coach-screws would do; but are rather expensive at £20 when I only need about 4 or 5.

Any ideas; Are Rawlbolts sutiable for hanging heavy loads from the ceiling?

Edit: My joists are about 40mm wide.

Burnerman · 1 Mar 2015

Coach screws are what you need here.....so long as you can screw directly into the ceiling timbers.
Are you going to use a tubular spacer, or something to provide you with the gap you need?
John

foxhole · 1 Mar 2015

http://www.screwfix.com/p/zinc-plated-screw-eyes-12ga-x-55mm-pack-of-10/17867
Then chain to support the lights.
[cheapest in wilko you can fill a bag for £2.99]
Need to make sure you hit the joists.

eveares · 1 Mar 2015

Don't really want to go down the chain route, I want the bar fixed ridged.

Are these suitable?: http://www.bryson.co.uk/product/index/03401ShieldsOnly

Burnerman · 1 Mar 2015

Expanding bolts are really for masonry.....coach screws are what you need, for that sort of weight.
John

eveares · 1 Mar 2015

I will just use some 200mm M12 coach bolts; These seem reasonably priced:

http://www.ebay.co.uk/itm/Coach-Tim...371?pt=LH_DefaultDomain_3&hash=item5895332263

I will have a 80mm (revised from 100mm) gap from the ceiling + the 25mm thickness of the bar; that will leave me 95mm of coach bolt going through the plaster board and into the joists.

Should be enough right?

Burnerman · 1 Mar 2015

Sure, so long as you hit the joists! Forgive my caution, but that sort of weight crashing down is best avoided!
John

eveares · 1 Mar 2015

Sure, so long as you hit the joists! Forgive my caution, but that sort of weight crashing down is best avoided!

Especially when it will be directly above my bed! (i'm serious)

Burnerman · 1 Mar 2015

Each to their own

I was never that young!
John

eveares · 1 Mar 2015

Whether it's a 13kg Moving head above my bed or above a stage, you just as doomed if it falls and lands on your head.

I will be hanging these + a couple of led par cans. (see photo)

Untitled

eveares
1 Mar 2015
1

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Fixings for lighting bar into ceiling above? (50KG load)

Similar threads