For cantilever slab it should be 28 days
You should be able to pour an additional 3" over the new section. It wouldn't hurt to coat the existing with a bonding agent, after "keying" the surface by roughening it so that the new slab grips onto the old. First check whether these was a reason for the slab being laid at that level. Is it to do with the moisture barrier of the new slab? Slabs that do not have moisture barriers are often set below those that do to reduce the chance of moisture entering the dryer slab. If the slab level is a mistake then any contractor who poured it should be liable to pour a topping slab to bring it the correct height.
ground not important ,could eyeball ...the frame is what you level..with a builders level is the fastest .
If you have a history of slab leaks, slab insurance may be the way to go. If your leaks are caused by earthquakes, then you may want to have the insurance, but it is not the most common, overall, for a slab leak to be caused by shifting/cracked slab. Your decision should be based on whether you think there is a good chance that a slab leak will happen again.
A Bricklayer, slab layer , tiler.
The slab is usually 4 inches thick. Fill over new plumbing with dirt. Bring the last couple of inches to level with bottom of slab with pea gravel. Pour new concrete ( a crack resistent Quickcrete or similar) 4 inches to bring level with existing slab. Trowel smooth.
It is the type of beam whose depth is equal or greater the slab but its top level is equal to slab. Engr A.haseeb
For both spareribs and loin back ribs, you should expect 11-14 bones in a whole slab.
Drill out the edge of the slab and add some dowels....or cut the slab back.
4 To 6 inches
Supended slab are slab not sit on the ground directlySuspended slab is a slab supported by beams.
The ray of light should be incident perpendicular to the surface of the glass slab. This ensures that the light ray does not get deviated or displaced while passing through the glass slab, emerging on the other side in the same direction.