When a contractor has to form a concrete wall within a few inches of an existing structure, STAY-FORM® is an excellent product. By utilizing STAY-FORM® with rebar studs, hook ties, and a modular form system, a one-sided form or blindside wall can be constructed. If you do not have the luxury or room to strip formwork, STAY-FORM® is the right product for the job.

  • The V ribs run perpendicular to the vertical rebar studs which gives the STAY-FORM® the rigidity to withstand the concrete pressures (see detail).

  • STAY-FORM® can be slit with tin snips or handheld grinder to accommodate the rebar hook tie (see detail).

  • STAY-FORM® is commonly used for concrete pour rates of 4 to 7 feet per hour.*

To see more examples of blindside wall applications, visit www.amicoglobal.com and click on Project Photos. Also, check out our Stayform concrete wall forms page.

how to build concrete wall forms
Installation - Quick View

Blindside Wall form Using STAY-FORM®

  • The STAY-FORM® ribs go into the pour.
  • Lap STAY-FORM® sheets over a rebar support.
  • Vertical lap (2 ribs minimum).
  • Recommended pour rate is 4’ to 7’ per hour.
  • Do not vibrate previous lift by more than 6”.
  • Where sheets lap, use 16-gauge tie wire or sheet metal screws with
    a minimum 3/8” head.
  • STAY-FORM® is compatible with self-consolidating concrete.
Steel Ply concrete forming system
concrete wall form, concrete forming work, blind wall
Steel Ply concrete forming system
concrete wall form, concrete forming work, blind wall
concrete wall form, concrete forming work, blind wall
concrete wall form, concrete forming work, blind wall

Applications Using STAY-FORM®and Blindside Wall Ties

STAY-FORM® Ties

Cut a slit in the STAY-FORM® using metal snips. After hook tie has been inserted through the slit in the STAY-FORM® engage the rebar stud. Slide keeper into place. Ties are available up to 48” long.

Double Waler

The lumber dimension “A” for a double waler is 8.-inches to accomodate the general thickness of 5/8 or 3/4-in plywood, two widths of 2×4’s and 1/2-in for the snap tie bracket.

Single Waler

The lumber dimension “A” for a single waler is 4-11/16 inches to accomodate the general thickness of 5/8 or 3/4-inch plywood, one width of 2×4 and 1/2-in for the snap tie bracket.

See Former Blindside Wall Projects

Contact us to gather more information about forming concrete walls with plywood.