BlueDeviledAg said:
Thanks Magnum. How expensive is the bois d'arc per ream? Does it rot?
They are messing with you on the Bois d'arc comment. There won't be any wood left permanently unless your concrete guy puts in an expansion joint. You don't have to worry about rot, the forms will be removed within a week of pouring, probably the next day. You won't need an expansion joint for a slab that size unless you are pouring it between 2 other foundations.
Regular ole yellow pine or Birch is what you want. A cheap, straight 2x6 is typical. If you call a contractor, they will setup the forms and tie all the steel (the rebar mesh, what you called lattice to start with). If you want to set up your own forms, get the pine or Birch, duplex 3" and 2 1/2" nails, a few bundles of 24" stakes and a few of 18" stakes. There is also dirt work involved typically, not sure what your 'pad' looks like. Concrete guys don't normally do major dirt work. They will level off dirt when they dig grade beams, but if you have grass and top soil in the way, they dont typically scrape off the soil and bring in fill. A dirt work contractor would do that before concrete. The fill under the soil has to be compacted well also.