Straight flat lumber without knotholes provides the best concrete forms.
How to build concrete wall forms with plywood.
Im looking at a job that has a 16 ft tall by 90 ft wall and a 20 ft tall by 50 ft wall.
If i make the ties close enough together does it matter.
Make sure the side of the plywood with the 2 by 4s nailed to it are facing out from the wall.
Does anyone have any idea how tall of a wall you can pour with 3 4 inch plywood forms just using cams and ties.
Since plywood comes in 4 x 8 sheets the forms are better off 8 long for the most part.
Thick concrete pours of greater than 8 inches may require a second round of stakes set a couple of feet behind the concrete form with kickers nailed to the bottom of the rear stakes and the top of the form stakes to provide additional stability.
Then pour your concrete inside the form using a chute or hose attached to the mixer.
To make the wall as strong as possible pour the concrete in layers no higher than 20 inches working from 1 end of the wall to the.
For taller walls build shorter forms to add to the 4 sections.
It would be advisable not to build the forms any taller than 4.
Worried about possibly blowing the forms and 1 inch formboard is hard to get ahold of.