Plywood Wall – needs to be a minimum of 17mm thick and should be a 7 ply, CD construction grade ply. Raw plywood will need painting if using outdoors. Marine grade ply is better for outdoor walls but is more expensive.
Brick Wall – This is possible to do BUT we do not supply mounting hardware for this type of installation. You can us Masonry Screws or expansion types bolts. Please do some research for yourself or ask a qualified builder who has experience with mounting items to brick walls.
Solid Concrete Wall – you can use a ‘Drop In Anchor Nut’. We can supply these, so please contact us first to find out more.
How Many Holds – 5 holds per square metre is a starting point. More will be needed for smaller kids.
Installing ‘T’ nuts – You can put in as many T Nuts as you like. This means you can add more holds or move holds later on. Drill a 7/16” or 11mm hole in the plywood, where you would like the hold to go. Remember to leave enough spacing so that holds don’t hit each other once mounted. Drill hole from front side of wall sheet. If drilled from behind the sheet, the drill bit will splinter the ply as it pushes through the sheet. Place the ‘T’ nut on the back side of the sheet, with the prongs facing the sheet. Using a hammer, bang in the ‘T’ nut till it is flush.
Mounting Hold – Hold must be mounted on a flat surface. Select the correct length bolt for the hold. You may have been supplied different length bolts. The bolt thread must be at least flush with the back of the ‘T’ nut or extend past the ‘T’ nut depth when tightened up (as per the picture below).
Place the bolt in the hold, through the wall and into the ‘T’ nut. Turn the bolt clockwise with fingers for the first 4 – 5 turns.
Tighten with the appropriate Allen Key wrench (5/16” or 8mm) until the hold is snug and does not spin. You may need to re-tighten later due to the timber expanding and contracting with temperature changes. Hold may also have a small hole for a wood screw to be added, to prevent further rotation if needed.
Be careful not to over-tightening, as holds may fracture and break.
NOTE – if you happen to drop the hold, it may fracture. Fractures may not be seen from the outside, so caution must be used after a hold has been dropped!
If in doubt, do not use the hold.