What exactly are these fixings? I need VERY VERY strong Brick fixings.

FrankFalcon

Hi all

I am having an extra Water Cylinder fitted at home and it has to sit on a specially made bracket.  I have the cylinder and bracket.  There is already a Cylinder in place on the other side of the loft and it is sat on an existing bracket which is fixed with the fixings as shown in the attached picture.  Whilst it may look like overkill, VERY strong fixings are necessary because of the weight of the water cylinder and the water inside.  Whoever fitted the existing bracket has done a good job using these fixings and I want to copy their job.  So, I'd be very grateful if you guys could advise me what these fixings are and if indeed they are the strongest available.  It is important I tell you that the existing bracket and the new proposed bracket are fixed into breeze/thermal block as shown in the picture.  It goes without saying that I'm looking for the strongest possible fixings to hold the bracket.

What do you reckon guys?

daveyjp

Search for 'through bolts'.

FreeBear

Could be an expanding wall bolt such as this - https://www.screwfix.com/p/rawlplug-rawlok-sleeve-anchors-silver-passivated-12-x-100mm-m10-10-pack/9336f (random selection).

Or it could be a resin fixing... In concrete blocks there won't be that much to choose between the two, but I'd suspect a sleeve anchor has been used and backed up by a generous helping of a grab adhesive.

weeg

My go to is resin anchors, but they are quite pricey.

FrankFalcon

Not bothered about the price really.  I just want the best/strongest fix. I can't afford to take any chances.  This bracket has to hold a Cylinder (That cost £750) and also 210 Litres of Water.  Therefore, it has to be the best and the strongest available taking into account what they are being fixed into.

FaceHead

These indeed look like through bolts. You can measure the size of the bolt with a ruler if you want some more to match. 

My go to for strong fixings onto brick/block work are the 7.5mmm masonry fixings.  They are so easy: drill a 6mm pilot hole and screw it in - no plug required. Quick and works every time.

Norman_Castle

https://www.screwfix.com/c/screws-nails-fixings/heavy-duty-fixings/cat840012#category=cat7290066
Friends have a full size punch bag hanging from these. Along with the regular movement from use it also copes with kids swinging on it.

travis-powers

If I’m building a flat roof and have to fix timber to a wall I only use resin now, you can get a tube which fits into a standard silicone gun and you can get pre cut studs from screwfix.

Belenus

Can you give the water cylinder extra support from underneath, ideally spreading the load over several joists so you don't run the risk of overloading them?

I am not an expert so please check with someone knowledgeable about such things in case that is a bad suggestion.

bpj

When we were looking for a heavy duty fixing for aerated concrete we came to the conclusion that a resin based fixing was the most reliable method. Aerated concrete can be so soft that expanding bolts and concrete screws can end up blowing out the hole, and regular plugs seem to often end up spinning.

For a less heavy duty application we tried the dewalt gasbetons without success. The main issue being that the hex hole used for insertion of the plugs did not hold up. Probably due to the plaster coat being too hard, may have been a different story if I had taken the time to give it a little more relief. Instead we used the extra long Fischer duopower plugs which seem to be doing a good job. We used a wood drill bit with no hammer action for the holes (after breaking through any plaster), as a masonry bit / hammer action just made a mess.

A nice thing about using Fischer products is that they provide load tables. Here's an example here for the duopower plugs:

https://fiproductmedia.azureedge.net/media/Load Tables/Load Tables fischer/LT_01_DUOPOWER_SEN_AIP_V1.pdf

And here for the resin that we ended up using (because you can use a standard cartridge gun):

https://fiproductmedia.azureedge.net/media/Load Tables/Load Tables fischer/LT_01_FIS-V-T1_F_SEN_AIP_V1.pdf

Good luck.

Chickereeeee

Another vote for a chemical anchor (resin fixing). Just get a tube that fits a standard cartridge gun, and it mixes as you lull the trigger. Have everything ready, as it hardens quickly. I used a length of threaded rod, and cut to size with a hacksaw. I was mounting something that had occasional shock loads onto old, fragile bricks from which other methods had pulled out. The chemical anchor approach is rock solid.