PA Purlin Anchor and Strap-Tie Holdown
Holdowns and Tension Ties
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Product Details
The PA is a solution for CFS-to-concrete and concrete-block connections. To support code requirements, the PA is designed to connect roof purlins to a masonry exterior wall. This purlin anchor features a dual-embedment line that allows for installation in concrete or concrete block (GFCMU).
Key Features
- Minimum embedment line indicators for both concrete and concrete block installations
- Screw pattern optimized for flange attachment
- Low design profile minimizes visibility
Material
- 12 gauge
Finish
- Galvanized or ZMAX® coating
Installation
- Use all specified fasteners; some models have extra fastener holes. See General Notes.
- Purlin anchor must hook around rebar.
- Allowable loads are for a horizontal installation into the side of a concrete or masonry wall.
- Strap may be bent one full cycle. (Bent vertical 90° then bent horizontal.)
Edge Distance: Minimum concrete edge distance is 5". Minimum concrete block left-to-right edge distance is 20".
Concrete Block Wall: The minimum wall specifications are:
A — one # 4 vertical rebar, 32" long, 16" each side of anchor
B — two courses of grout-filled block above and below the anchor (no cold joints allowed)
C — a horizontal bond beam with two #4 rebars, 40" long, a maximum of two courses above or below the anchor
D — minimum masonry compressive strength, f'm = 1,500 psi
Related Literature
Product Information Table
| Model No. | Ga. | W (in.) | L (in.) | Coating/Material | Packaging Qty. |
|---|---|---|---|---|---|
| PA18 | 12 | 2 1/16 | 18 1/2 | Zinc Galvanized, G90 | 1 |
| PA18Z | 12 | 2 1/16 | 18 1/2 | ZMAX® | 1 |
| PA23 | 12 | 2 1/16 | 23 3/4 | Zinc Galvanized, G90 | 1 |
| PA23HDG | 12 | 2 1/16 | 23 3/4 | Hot-Dip Galvanized | 1 |
| PA23Z | 12 | 2 1/16 | 23 3/4 | ZMAX® | 1 |
| PA28 | 12 | 2 1/16 | 29 | Zinc Galvanized, G90 | 1 |
| PA28Z | 12 | 2 1/16 | 29 | ZMAX® | 1 |
| PA35 | 12 | 2 1/16 | 35 | Zinc Galvanized, G90 | 1 |
| PA35Z | 12 | 2 1/16 | 35 | ZMAX® | 1 |
| PA51 | 12 | 2 1/16 | 51 | Zinc Galvanized, G90 | 1 |
| PA51Z | 12 | 2 1/16 | 51 | ZMAX® | 1 |
| PA68 | 12 | 2 1/16 | 70 | Zinc Galvanized, G90 | 1 |
| PA68Z | 12 | 2 1/16 | 70 | ZMAX® | 1 |
Load Tables
These products are available with additional corrosion protection. Additional products on this page may also be available with this option. Contact Simpson Strong-Tie for details.
- Loads may not be increased for short-term loading.
- For concrete installs, the minimum compressive strength, f'c = 3,000 psi.
- Multiply Seismic and Wind ASD load values by 1.4 or 1.6, respectively, to obtain LRFD capacities.
- In accordance with 2012, 2015 and 2018 IBC Section 1613.1, detached one- and two-family dwellings in Seismic Design Category (SDC) C may use "Wind and SDC A&B" allowable loads.
- Minimum center-to-center spacing is 3 times the required embedment (Smin = 3 x le) for PA acting in tension simultaneously, where le = embedment depth. Standard installation is based on minimum 5" end distance.
- Install fasteners symmetrically and with a minimum of 4 of the required fasteners between the embedment line and the first tooling hole. In some cases, not all of the fastener holes will need to be filled.
- Per ASCE7-10, 12.11.2.2.2, for diaphragms in structures assigned to SDC C-F, maximum allowable strap tensile capacity shall be no less than 1.4 times the design load. Not applicable (NA) for Wind and SDC A&B designs.
- For PA straps, concrete embedment shown; embedment in masonry shall be 6".
- See Fastening Systems for more information on Simpson Strong-Tie fasteners.
Code Reports & Compliance
Drawings
| DWG | DXF | RFA | IFC | SAT | |||
|---|---|---|---|---|---|---|---|
