We use cookies on this site to enhance your user experience. By clicking "I AGREE" below, you are giving your consent for us to set cookies. Privacy Policy

text.skipToContent text.skipToNavigation

PAI Purlin Anchor for I-Joist

PAI

On This Page

Purlin Anchors

This product's information may differ depending on the category of use. You are currently viewing details related to Purlin Anchors. You can also view product information related to the category: Misc. Connectors for Engineered Wood

The PAI is a solution for wood-to-concrete and wood-to-masonry connections which satisfies code requirements. This purlin anchor is specifically designed for I-joist connections to concrete or masonry walls. The PAI features a dual-embedment line for ease of installation.

Key Features

  • Minimum embedment line indicators for both concrete and masonry installations
  • Nailing pattern optimized for I-joist wood member
  • Low design profile minimizes visibility

Material

  • 12 gauge

Finish

  • Galvanized

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

Wood Construction Connectors 2021-2023
C-C-2021
A catalog including new product information as well as any applicable specification and installation instructions for wood-to-wood and wood-to-concrete structural connectors.
Catalog
Conectores para la construcción con madera 2021–2023
C-C-2021SP
El catálogo incluye información sobre nuevos productos, así como especificaciones e instrucciones de instalación aplicables para conectores estructurales de madera a madera y de madera a concreto.
Catalog
Connectors Installed on SCL Columns
T-C-SCLCLM21
A technical bulletin discussing the structural properties of the two different surface sides of SCL columns.
Technical Bulletin
Connectors Installed on SCL Columns
T-C-SCLCLMCAN20
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.
Technical Bulletin

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Ga. L (in.) Coating/Material Packaging Qty.
PAI18 12 18 1/2 Zinc Galvanized, G90 1
PAI23 12 23 3/4 Zinc Galvanized, G90 1
PAI28 12 29 Zinc Galvanized, G90 1
PAI35 12 35 Zinc Galvanized, G90 1

Load Tables

Wind and SDC A&B — Allowable Tension Loads (160)
Max. Ledger Size Model No. Strap Length, L (in.) Embed Length, le (in.) Uncracked Concrete Cracked Concrete GFCMU Wall Max. Allowable Strap Tension Deflection at Allowable Load (in.)
Concrete GFCMU Required Nails (in.) Tension Required Nails (in.) Tension Required Nails (in.) Tension
4x Ledger PAI18 18 4 6 (10) 0.148 x 1 1/2 2,025 (10) 0.148 x 1 1/2 2,025 (9) 0.148 x 1 1/2 1,055 NA 0.1
PAI23 23 4 6 (15) 0.148 x 1 1/2 3,035 (12) 0.148 x 1 1/2 2,260 (14) 0.148 x 1 1/2 1,805 NA 0.158
PAI28 29 4 6 (16) 0.148 x 1 1/2 3,230 (12) 0.148 x 1 1/2 2,260 (16) 0.148 x 1 1/2 2,705 NA 0.167
PAI35 35 4 6 (16) 0.148 x 1 1/2 3,230 (12) 0.148 x 1 1/2 2,260 (18) 0.148 x 1 1/2 2,815 NA 0.13

See Footnotes1 below

SDC C-F — Allowable Tension Loads (160)
Max. Ledger Size Model No. Strap Length, L (in.) Embed Length, le (in.) Uncracked Concrete Cracked Concrete GFCMU Wall Max. Allowable Strap Tension Deflection at Allowable Load (in.)
Concrete GFCMU Required Nails (in.) Tension Required Nails (in.) Tension Required Nails (in.) Tension
4x Ledger PAI18 18 4 6 (10) 0.148 x 1 1/2 2,025 (10) 0.148 x 1 1/2 1,980 (9) 0.148 x 1 1/2 1,055 4,180 0.1
PAI23 23 4 6 (14) 0.148 x 1 1/2 2,830 (10) 0.148 x 1 1/2 1,980 (14) 0.148 x 1 1/2 1,805 4,180 0.158
PAI28 29 4 6 (14) 0.148 x 1 1/2 2,830 (10) 0.148 x 1 1/2 1,980 (16) 0.148 x 1 1/2 2,705 5,070 0.167
PAI35 35 4 6 (14) 0.148 x 1 1/2 2,830 (10) 0.148 x 1 1/2 1,980 (18) 0.148 x 1 1/2 2,815 5,070 0.13

Footnotes1

  1. Allowable loads have been increased for wind or earthquake loading with no further increase allowed. Reduce where other loads govern.
  2. Deflection listed is at the highest allowable load.
  3. Multiply seismic and wind ASD load values by 1.43 or 1.67, respectively, to obtain LRFD capacities.
  4. Nail quantities are based on Douglas fir (DF) or equivalent specific gravity of 0.50 or better. For use in spruce-pine-fir (SPF) or hem fir (HF), nails quantities shall be increased by 1.15 to achieve loads listed.
  5. For wall anchorage systems in SDC C-F, the maximum strap allowable load shall not be less than 1.4 times the ASD anchor design load.
  6. Minimum center-to-center spacing is 3x the required embedment — i.e., standard installation is based on a minimum 5" end distance.
  7. Structural composite lumber beams have sides that show either the wide face or the lumber strands/veneers. Values in the tables reflect installation into the wide face.
  8. Concrete shall have a minimum compressive strength of f'c = 3,000 psi.
  9. Grout-filled CMU (GFCMU) shall have a minimum compressive strength of f'm = 1,500 psi.
  10. 0.148" x 1 1/2" nails shall be used directly onto framing member. For installation over sheathing, use 2 1/8"-long nails minimum.
  11. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

Related Products