This works well. Even easier is using a turnbuckle rather than a solid 2x4 at at angle. The turnbuckle is attached to the horizontal 2x4 on the wall and onto another 2x4 extensions (cut to required length). The second 2x4 is fastened to a wood stake. This allows for adjustment after concrete is placed but simply turning the turnbuckle.
p.s. Can also flip the turnbuckle so it is fastened to ground with steel pin and the cut 2x4 is fastened to the horizontal 2x4. Either one works fine, but the second option means you have to bend over to adjust.....(first world problem)
Posted By arkie6 on 20 Nov 2018 08:29 AM
Brace with 2x4s since no walk board is needed for 4' high forms? Screw a 2x4 horizontal along the top edge of the forms then cut and attach 2x4 kickers at a ~45 deg angle to ground stakes every 4' or so. If possible, brace on the side opposite of the pour so that the guy operating the hose (assuming you are using a pump truck) doesn't have to step over the kicker braces.