South basement temporary entrance outside form. The six wooden blocks , shown on six & one half by 4′ x 8′ 3/4″ thick plywood sheets . The wooden blocks have three quarter inch all- thread rods through the center of the blocks to the inside and outside of the form , with a 4 ” x 4 “washer & a 3/4 ” nut on each end . These wooden blocks and all-thread rods & washers and nuts are tighten to help hold the form in place , so the plywood will not push out ,when the form is filled with concrete .