Browse Forums General Discussion Re: Warped / "ripple" concrete foundation / slab 22May 26, 2014 6:07 pm You dont need to use anything outside the slab as a reference. There is no guarentee it will not move. You just need to take a point anywhere on the slab and call that zero then all level now and in the future are taken from that point. The tollerence within a house slab is 4mm in any 2m. Cheers mgilla Re: Warped / "ripple" concrete foundation / slab 23May 26, 2014 6:20 pm Thanks Mgilla we don't use bench marks for cracked house investigations we do as you say zero inside the house usually near the center.The recent Metrricon case they used outside bench marks including AHD and the arguments over levels got pretty messy. What would you expect the total deviation for typical slab after being poured to be ? say 20m long slab We have a Victorian style ripple iron fence out the front that has some moulded timber capping. Probably 15+ years old and has cracked and splintered in parts...not really… 0 2495 It's hard to comment as the photos area bit dark ( you might need a new 15 - just got one and wow ) Jokes aside, I can see one member that is cracked. I would find a… 2 2222 The concreter will take and reuse. In my case I bought structural LVLs and scraped them back and used them as joists. 1 5160 |