/ Climbing Holds on breeze block
Has any one done it, how did you do it, and where did you get the stuff from?
Proper breeze blocks, as in slightly harder than Weetabix or do you mean a light/medium density concrete block? In my experience putting an expanding anchor in soft blockwork is asking for trouble as it expecting it to take any sort of outwards pull.
What sort of bouldering wall are you thinking of: Slab, vertical, gentle overhang, steep or a full on cave?
Im just looking at a flat wall at the moment- maybe with some overhanging sections (it can't take up too much room away from the wall though!)
The wall is flat, 4m high and 7(ish)m long!
I suspect you'll need to use glue in bolts or through bolts to fix it to the wall unless you want to end up wearing it :-) Can you put in spreaders or legs to support steeper sections?
and if the blockwork is hollow you may want the sives too.
Surely you want to bolt on a plywood face rather than individually bolting all the holds to a breezeblock wall? At £2 a pop and a fair bit of faff I'd have thought ply wood and t-nuts works out cheaper for a reasonable area of wall!
So it terns out that the Breeze blocks are air filled! Is it still doable?
Do you have the option of drilling right through and putting a spreader on the outside?
Nope, nextdoor is some one else unit!
I think you may have problems then. If the mortar between the blocks is good then perhaps gluing bolts into there to fix plywood to?
I'd probably fix a wooden frame to the blockwork and then screw your plywood onto that. You want a bit of space behind the wall for some air flow (reduces the chances of it rotting) and space for the bolts for the holds to stick through a bit.
SO, fix ply wood to the wall with the glue in resin bolts, and the climbing holds to the ply with T nuts?
They should be fitted with resin in anchors, because the length of bolt varies coming out the back of the hold, you can't use expanding fixings.
with the right resin for the type of wall
or drop in anchors
sorry to bother again, but would something like this work?
I have an account with CPC so anything of there is slightly cheeper for me!
Just use concrete screws. The thread is hardened and will self tapp into the block. 6.5mm drill bit for a 7.5 concrete screw. You might need some washers to stop the heads of the screws pulling through the holds. Alternativly, ask a Joiner.
will do! Im also contemplating fixing the ply to the I-beam frame?
yes, but use M10 not M8
Expansion bolts in breeze block, really? If the OP is correct and they are 'proper' breeze blocks then you wouldn't hang your coat on an expansion bolt never mind a bouldering wall!
They are solid cons
That would make life a lot easier! I'll drill a hole this afternoon to make sure!
Also, is the wall stable?
I personally would not trust expanding bolts taking a dynamic load in lightweight block since they could come loose over time.
I would fix plywood or timber rails to the wall using chemical anchors and fix your holds to that.
But.... all this is looking at it from the ppoint of view of engineering it so as to be perfectly safe.
You'd 'probably' get away with less.
They look like solid blocks from that photo, I've never seen an external wall in breeze blocks but I've seen a few internals and partition walls.
thanks for all the help guys!
The plan it seems is to attach a timber frame to the wall with expanding bolts and cover it in ply! Any advice as to how much space I need between the ply and the wall?
I'll put up some pictures when I start building it, if you don't hear back from me, its all gone horribly wrong! :P
the wall is going to be 12x12ft which is 3.6ish meters! Not bad for a "home" wall!
They are 7n concrete blocks, you'll be fine fixing straight to the blockwork.
The reason I asked for a photo is because I thought it strange that an industrial unit, breeze aren't fire rated like the solid concrete blocks.
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