DIYbanter - View Single Post

Robert Allison[_2_]

wrote:

On Sun, 17 Feb 2008 18:53:09 GMT, Robert Allison
wrote:

Use #4 (1/2") rebar. Drill 1/2" holes and drive the dowels about
4-6" into the existing concrete.

In Florida where we "stick and dowel" they want epoxy in the hole,
something like the Simpson set22 and about 5" embedment. The Set22
comes in a 2 tube set and mixes when you squeeze it out of the
applicator nozzle. (a long tube with a mixing twisty doodad in it that
gets the mix to the back of the hole)
Home Depot sells it here next to the hurricane clips and other Simpson
connectors. If you are going this way it would be worth renting a real
rotary hammer (drill) unless you have one. A Hilti or Bosch will drill
that concrete like soft pine.

That is probably unnecessary, unless Miami can't drill a straight
hole. If you choose to use the epoxy, you should drill an
oversize hole and then epoxy. It is a very tight fit for a #4
dowel in a half inch hole. You have to drive it in with a 2 lb
hammer. I only use epoxy if I am attaching a separate slab to an
existing slab and I am concerned about the new slab moving away
from the original. That is not the case here. The slab has
nowhere to go, except up or down.

--
Robert Allison
Rimshot, Inc.
Georgetown, TX