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PA/HPA Purlin Anchors

PA/HPA

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Holdowns and Tension Ties

This product's information may differ depending on the category of use. You are currently viewing details related to Holdowns and Tension Ties. You can also view product information related to the category: Purlin Anchors

PA/HPA purlin anchors offer solutions for CFS to concrete and concrete block connections which satisfy code requirements. The PA's dual embedment line allows installation in concrete or concrete block.

Material

  • PA — 12 gauge; HPA — 10 gauge

Finish

  • Galvanized; PAs available in HDG 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

Options

  • See LTT, HTT and S/LTT, S/DTT tension ties for alternate retrofit solutions

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High Wind-Resistant Construction Application Guide
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The newly updated High Wind-Resistant Construction Application Guide offers new applications, updated loads, as well as more fastening information that is used to resist high-wind.
Product Guide
Connectors Installed on SCL Columns
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A technical bulletin discussing the structural properties of the two different surface sides of SCL columns.
Technical Bulletin
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A Canadian Limit States technical bulletin addressing typical installations of Simpson Strong-Tie® connectors on SCL columns as well as reduction factors for narrow-face SCL installations.
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PA Models - Vertical Installation in the Top of GFCMU
L-C-PAGFCMUUP20
Simpson Strong-Tie PA models have a machine-tooled embedment line on the product for masonry of 6", applicable to grout-filled concrete masonry units (GFCMU).
Engineering Letter

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.

  1. Loads may not be increased for short-term loading.
  2. For concrete installs, the minimum compressive strength, f'c = 3,000 psi.
  3. Multiply Seismic and Wind ASD load values by 1.4 or 1.6, respectively, to obtain LRFD capacities.
  4. 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.
  5. Minimum center-to-center spacing is 3 times the required embedment (Smin = 3 x le) for PA/HPAs acting in tension simultaneously, where le = embedment depth. Standard installation is based on minimum 5" end distance.
  6. 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.
  7. 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.
  8. For PA straps, concrete embedment shown; embedment in masonry shall be 6".
  9. See Fastening Systems for more information on Simpson Strong-Tie fasteners.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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