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.
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.
Applications Using STAY-FORM®and Blindside Wall 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.
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.
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.