First Project With the New Powermatic Table Saw #19: Slab Grading: Rebar

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Blog entry by psient posted 02-05-2013 07:08 PM 2268 reads 0 times favorited 0 comments Add to Favorites Watch
« Part 18: Slab Grading: Second rough-in and forms Part 19 of First Project With the New Powermatic Table Saw series Part 20: Shop Slab: reinforcing steel placement »

I just began placing the rebar in earnest. I set all the anchor dowels tying the new slab with old concrete work 2/4 (yesterday). The rest was done this morning, 2/5. The electrical conduit is primarily to get a 240 volt 60 amp circuit in a position to use my welder anywhere on the slab-area. The slot cut in the stucco is a service re-routed due to the new slab that will be patched when the slab has been completed. I’ll pull my welder circuit from an existing one in the garage.

The rebar you see has just been spread. I will place the grid on dobies to keep reinforcement mid-slab. I still have to cut and size to length those rods that intersect the slab’s angled offset.

The depth of the footings is about 18” with a width of 20-24”. Note the 2X12 top of slab at the driveway; here you can tell that the slab finish grade is about 5” above the driveway. I calculate the slab thickness as 8” figuring the concrete yardage although it will actually be closer to 7”. The oversizing of the footings is a result of digging them with my tractor’s FEL.

The rebar is #4 @18” between rods. I did this to ensure a CNC mill will be adequately supported if and when I spill for one.

My next cycle will be to form the driveway/slab intersection along with the apron. I’ll also have to form the slab/walkway around the little room off the garage- intersection as well.

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