Thursday, January 27, 2011

Concrete foundation: Phase 1 complete

Phase 1 (of 3) is now complete on our concrete foundation!

First, 1/2" rebar was bent and cut to reinforce the footing and to add vertical tie-ins for the stem wall (to be poured later).

I ran two lengths around the perimeter consisting of four 20 ft sections and some scrap I scored free from Craigslist. To get the rebar off the ground, I could've used metal "chairs" or concrete dobies but opted for suspending it with wire and wood.

Every 4 feet, I put in a small horizontal section and then a vertical L shaped piece that is the tie in for the eventual stem wall.
With the rebar in place, yesterday in the wee morning hours to beat the freaky unseasonable heat, Kendra and I got to work mixing, pouring and troweling concrete for the foundation's footing.
Getting the right consistency. Also, Weber grill on pile of rubble....ya
We ended up using around fifty 80lb bags. Total pain in the ass to move that kind of weight around! 4000lbs lifting in the store into the cart, cart to the car, car to the backyard, backyard to the mixer, ugh. Ok enough whinging haha
Carefully eying the changing consistency. Lots of emptied bags
We got a good system going where I'd be busy lifting and mixing bags while Kendra moved the concrete where it needed to go and troweled.

After it was all laid and roughly troweled (doesn't matter how it looks, just need to get out any voids), we laid plastic down to keep moisture in and prevent drying. The slower the concrete drys, the better; if it dries too quickly, its prone to cracking and is more brittle.
Today we uncapped the plastic and behold, our new concrete moat!

The footing is approximately 16" wide (a bit wider on the load bearing ends) and 8" deep. Should be plentyyy of support for our tiny house.
Next phase, chalking out lines for the final layout, bending and cutting more rebar, building the form for the stem wall (not looking forward to this) and then finally pouring the stem wall.

Stay tuned :)

1 comment:

  1. Now, that's one fine job of backyard masonry! I totally agree that the curing of cement should not be rushed, as its strength is highly dependent on this. The concrete, in its curing stage, should not be subjected to any form of stress to allow the chemical reactions to properly take place. It is very advisable that we consult people who are highly knowledgeable about concrete.
    Manuela Jelen