The ASTHD holdowns embed into concrete foundations and nail to shear panel perimeter members to resist uplift load caused by earthquake and hurricane forces on a structure. They are an economical, high load connector preferred by contractors. The nail pattern facilitates nailing to the edges of double 2x members.

MATERIALS: 12ga. galvanized steel. Available in G-185 Triple Zinc or Hot-Dip Galvanized. Call for availability.

LOADS: Larger seat-bearing and designed direct nailing provide proper installation of all nails into joist hangers.

CODES: ESR-3635

NOTES:

1. See drawing for L and S dimension, and installation requirements.
2. 10d common (3-inch long x 0.148-inch diameter) may be used with no load reduction.
3. Deflection at highest allowable loads (ASD) are as follows: ASTHD10 = 0.067-inch, ASTHD14 = 0.084-inch.
4. Multiply seismic and wind ASD loads by 1.4 and 1.6, respectively, to obtain LRFD capacities. LRFD for ASTHD10 and ASTHD14 must not exceed 7700 pounds and 8250 pounds, respectively, with time effect factor of 1.0.
5. In accordance with IBC Section 1613.1, detached one- and two- family dwellings in Seismic Design Category ((SDC) C (and under) may use design loads for SDCs A, B.
6. Minimum center-to-center spacing is 3 times the required embedment (Smin =3 x LE) for the holddowns acting in tension simultaneously. Mid-wall location is based on 1.5 x LE end distance.