1. Use ½" (13mm) sheets of 1/2" (13mm) plywood or 2" (50mm) lumber
to build the side forms. Cut the forms according to the planned
dimensions of the steps, always allowing extra depth for fill below the
ground level.
2. Brace firmly in place with 2 x 4 stakes and diagonal braces running
from the top edge of the sides to stakes set firmly in the ground.
3. Use a level to keep the forms perfectly vertical. If the steps are
being built against a house or other foundation be sure to apply a ½"
(13mm) QUIKRETE® Fiber Expansion Joint.