moudzj wrote:Hi mate,
Engineer/builder here.
These days, minimum thickness of a conventional steel reinforced suspended slab is 200mm. Older slabs are thinner. No way to tell the thickness of your slab without checking plans or asking, could vary for multiple reasons, even throughout the building.
What you seriously need to be careful of is Post Tensioned slabs. Last thing you want to be doing is drilling through and snapping one of these cables. So, unless you ask the body corporate for this info, there is really no way to tell without risk. They would probably disallow you to drill thru the slab regardless.
Your absolute best course of action is buying a safe >150kg and avoiding drilling.
Goodluck.
TassieTiger wrote:Curiosity Question - would body Corp need to know storage of firearms on premises regardless? Would insurance be voided if you didn’t ?
Tiger650 wrote:Not sure how Plod would know what length dynabolts you used ?
I wonder if chemsets are available in shorter lengths ?
Plod would have his work cut out verifying the installed length of a chemset.
TassieTiger wrote:What about those blue industrial strength concrete screws ? I used them to secure gate rails and they cracked concrete (Not 100mm thick) before They broke ?
I cannot recall name - but larger ones have hex key drive...drill hole and then thread cuts like self tap - into concrete - double up on numbers maybe and fill heads with resin ?
You can write to commissioner and get approval for things like that - given your building may well be protected via entry etc - they might be open to suggestions...
JSS wrote:TassieTiger wrote:What about those blue industrial strength concrete screws ? I used them to secure gate rails and they cracked concrete (Not 100mm thick) before They broke ?
I cannot recall name - but larger ones have hex key drive...drill hole and then thread cuts like self tap - into concrete - double up on numbers maybe and fill heads with resin ?
You can write to commissioner and get approval for things like that - given your building may well be protected via entry etc - they might be open to suggestions...
They're called Excalibur bolts.
Personally to play it safe if you're worried about the slab i'd just use 50mm dyna bolts or chemset in some threaded rod 50mm deep You're not going to hit anything vital at that depth, most slabs like that should have 50mm cover before you even hit mesh. Nobody is ever going to know they're not 100mm and they're not going to budge an inch.
moudzj wrote:JSS wrote:TassieTiger wrote:What about those blue industrial strength concrete screws ? I used them to secure gate rails and they cracked concrete (Not 100mm thick) before They broke ?
I cannot recall name - but larger ones have hex key drive...drill hole and then thread cuts like self tap - into concrete - double up on numbers maybe and fill heads with resin ?
You can write to commissioner and get approval for things like that - given your building may well be protected via entry etc - they might be open to suggestions...
They're called Excalibur bolts.
Personally to play it safe if you're worried about the slab i'd just use 50mm dyna bolts or chemset in some threaded rod 50mm deep You're not going to hit anything vital at that depth, most slabs like that should have 50mm cover before you even hit mesh. Nobody is ever going to know they're not 100mm and they're not going to budge an inch.
Absolutely not true. Minimum cover can be as little as 20mm and usually not ever more than 30mm, and that's assuming works executed properly, which with concrete, it never is.
OP since you are moving so often just get a heavy save and enough with the absurdities.
moudzj wrote:
Absolutely not true. Minimum cover can be as little as 20mm and usually not ever more than 30mm, and that's assuming works executed properly, which with concrete, it never is.
OP since you are moving so often just get a heavy save and enough with the absurdities.
Ziege wrote:If you're relocating it a lot then dynabolts are a pain in the ass, just use the screws and plugs, save yourself the pain, don't drill deeper than 80mn if you don't know the slab thickness, with ant luck if it's older it will be 160mm minimum, as the original reply, 200mm is the new standard
Ziege wrote:That until one bends, cracks, twists, etc, etc, etc, etc, I have put in literally thousands, hence why I don't use them anymore, neither do the majority of the cyclone rated builders I have/do work for, I now fabricate instead of stand frames and posts, and the options they use now are more expensive, in some cases twice as much as a dynabolt, but they're just not worth the arse ache
Rider888 wrote:Ziege wrote:That until one bends, cracks, twists, etc, etc, etc, etc, I have put in literally thousands, hence why I don't use them anymore, neither do the majority of the cyclone rated builders I have/do work for, I now fabricate instead of stand frames and posts, and the options they use now are more expensive, in some cases twice as much as a dynabolt, but they're just not worth the arse ache
What would you recommend I use instead of dynabolts? remembering i need a bolt that can be removed