Wood Construction Connectors - Page 20

®	PA/PAHD/HPAHD HOLDOWNS

Wood-to-concrete connectors that satisfy engineering and code requirements.

MATERIAL: HPA -- 10 gauge x 2-1/16"; all others -- 12 gauge x 2-1/16"

FINISH: Galvanized. Selected products available in Z-MAX coating; see page 6.

INSTALLATION:

• Use all specified fasteners. See General Notes.
• Bending the strap 90° to aid wall placement may cause spalling behind the strap. If the spall is 1" or less, measured from the top of the concrete foundation to the bottom of the spall, full loads apply. For spalls between 1" and 4" (see illustration), the allowable load is 0.90 of the table loads.
• Where fewer fasteners are used in the structural wood member, reduce loads according to the code. A wood splitting problem may occur when holdowns are nailed to lumber less than 3-1/2" wide. To lessen splitting of 3x's or double 2x's, either fill every nail hole with 10dx1-1/2" nails or fill every other nail hole with 16d commons. Reduce the allowable load based on the size and quantity of fasteners used.
• Unless otherwise noted, do NOT install where: (a) a horizontal cold joint exists within the embedment depth between the slab and foundation wall or  footing beneath, unless provisions are made to transfer the load, or the slab  is designed to resist the load imposed by the anchor; or (b) slabs are poured over concrete block foundation walls.
• To get the full table load, the minimum center-to-center spacing is twice the embedment depth when resisting tension loads at the same time.

FOUNDATION CORNERS:

Nail and bolt quantities have been reduced when the load is limited by tested concrete pullout strength (fill holes from bottom up); additional nail holes need not be filled. Nail and bolt quantities may be reduced further for less than 8" corner distance design loads -- use code allowable loads for fasteners used in shear.

TWO-POUR SYSTEMS: When a cold joint exists between slab and foundation, the holdown will be lower on the stud wall since the embedded portion of the holdown must be in the foundation (see table footnote 1 for exception). Fewer fasteners are used, reducing allowable loads. Loads are calculated using a 4" slab over 6" and 8" foundation walls.

PA51, PA68 FOUNDATION STRAPS: Designed for foundation to double 2x10 band joists and crawl space floor system connections in high wind or earthquake resistant construction.

PAHD42, HPAHD22, HPAHD22-2P HOLDOWNS: Designed to be installed at the edge of concrete. Tests determined the pullout strength with one horizontal #4 rebar in the shear cone. Rebar should be a min. length of 2x embedment depth + 12" (except corner installations, pg 19). Install before pouring concrete by nailing to form. Installation holes allow nailing to the form, resulting in 1" deeper embedment; see illustration.

OPTIONS: See also HDA Holdowns, LTT, MTT, HTT Tension Ties.

CODES: BOCA, ICBO, SBCCI NER-393 and NER-469.

1. HPAHD22 may be embedded 4" into the slab and 6" into the 8" stemwall beneath for a maximum load of 2810 lbs. at 8" minimum from the closest corner, and 1200 Ibs. at 1/2" from the closest corner (like installation 4).
2. TYPICAL INSTALLATION: The minimum concrete compression strength is 2500 psi. For 2000 psi, calculate loads at 0.89 of the table allowable loads. CORNER INSTALLATION: The minimum concrete compression strength is 2000 psi.
3. Allowable loads have been increased 33% and 60% for earthquake or wind loading with no further increase allowed.
4. 16d sinkers (9 ga x 3-1/4') or 10d commons may be substituted for specified 16d commons at 0.85 of table loads.
5. Minimum nail end distance to prevent splitting is 10x the nail diameter, or 1-5/8" for 16d nails,
6. Calculate loads using straight line interpolation for corner distances between 1/2" and 8".
7. Minimum lumber thickness for bolt allow able loads is 2-1/2" for proper embedment of bolt into the wood member; reduce allowable load according to the code for lesser lumber thicknesses.
8. Optional fastener holes are provided on selected products. Because the product is limited by the concrete foundation, you may not need to install optional fasteners.
9. Rim joist application; see Installation 3 for corner condition.
10. Strap may be bent one full cycle.

1. Loads have been increased 33% and 60% for earthquake or wind loading with no further increase allowed.
2. 16d sinkers (9 GA x 3-1/4") or 10d commons may be substituted for the specified 16d commons at 0.85 of the table loads.
3. Optional fastener holes provided. Calculate loads according to the code to a maximum of 3685 IBS Minimum embedment is 4"; 5" to the nearest edge.