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WP Welded Purlin Hanger


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Top-Flange Hangers for Engineered Wood

This product's information may differ depending on the category of use. You are currently viewing details related to Top-Flange Hangers for Engineered Wood. You can also view product information related to the categories of: Top-Flange Hangers for Solid Sawn Lumber, Top-Flange Hangers for Plated Truss, Joist Framing Connectors for Cold-Formed Steel Construction

The WP is designed to support joists on purlins or beams and may be used for wood-to-wood or wood-to-steel applications. This top-flange hanger offers exceptional flexibility and versatility with the ability to be skewed up to 84° and/or sloped to a maximum of 45°. The WP is an economical choice with a low installed cost requiring a small number of nails for maximum downloads.

Key Features

  • Highly modifiable with alteration options including opened/closed top flange and offset top flange
  • Top flange may be sloped to a maximum of 35° to accommodate a sloped header
  • Features a solid one-piece top flange that provides extra stability in panelized roof applications


  • Stirrup — 97 mil (12 ga.)


  • Simpson Strong-Tie® gray paint. Some models available hot-dip galvanized; specify HDG. See Corrosion Information.


  • Use all specified fasteners.
  • The WP may be used for weld-on applications. The minimum-size weld is a 1 1/2"-long fillet weld to each side of the top flange; weld size to match hanger material thickness. See General Instructions for the Installer, note k for weld information. Weld-on applications have the maximum allowable capacity listed. Uplift loads do not apply to this application.
  • Non-modified hangers can support joists sloped up to 1/4 :12 using table loads. For joists sloping between 1/4 :12 and 3/4 :12 use 85% of the table loads. See technical bulletin Sloped Joist in Non-Sloped Hangers (T-C-SLOPEJST).
  • Web stiffeners are required for these hangers.
  • If joist is shorter than hanger by more than 1/2" use only 50% of the table loads.


  • W and H dimensions are modifiable

Sloped and/or Skewed Seat:

  • May be skewed to a maximum of 84° and/or sloped to a maximum of 45°.
  • For slope only, skew only, or slope and skew combinations, the allowable load is 100% of the table load.
  • Specify the slope up or down in degrees from the horizontal plane and/or the skew right or left in degrees from the perpendicular vertical plane. Specify whether low side, high side or center of joist will be flush with the top of the header.

Related Literature

Load Tables

Nailer Table

The table indicates the maximum allowable loads for WP hangers used on wood nailers. Nailers are wood members attached to the top of a steel I-beam, concrete or masonry wall.

WP Nailer Table
  1. Attachment of nailer to supporting member is the responsibility of the designer.
  2. Uplift loads are based on DF/SP lumber. For SPF/HF, use 0.86 x DF/SP uplift load.

Various Headers

    These products are available with additional corrosion protection. Additional products on this page may also be available with this option. Check with Simpson Strong-Tie for details.

WP/HWP/HWPH/WMU Plated Truss Top-Flange Hangers Various Headers
  1. LVL headers are assumed to be made primarily from Douglas fir or southern pine. For LVL made from spruce-pine-fir or similar less-dense veneers, use the values found in the SPF/HF column.
  2. WP quantity of nail holes in the top flange varies.
  3. For hanger heights exceeding the joist height, the allowable load is 0.50 of the table load.
  4. Fasteners: Nail dimensions in the table are diameter by length. Titen 2 screws are Simpson Strong-Tie masonry screws. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.

Modifications and Associated Load Reductions for WP/HWP/HWPH

Models Seat Top Flange Top Flange & Seat Joist Height
Seat Sloped 45° Max. Seat Skewed Type A Seat Skewed Type B Seat Sloped and Skewed Type A 1°-45° Top Flange Sloped 35° Max. Top Flange Bent Open or Closed 30° Max. Top Flange Offset Top Flange Offset and Skewed Seat Type A, Bevel Cut 1°-45° Top Flange Offset and Skewed Seat Type B, Plumb Cut 1°-84° Joist Shorter Than Hanger
Slope Up Slope Down 1°-45° 1°-45° 46°-84° Up Down Narrow Wide Narrow Wide Narrow Wide
  1. For straight-line interpolation, “a” is the specified angle.
  2. Reduction factors are not cumulative. Use the lowest factors that apply.
  3. Narrow ≤ 3 1/2", Wide > 3 1/2".
  4. HWP & HWPH options receive catalog uplift loads except: skewed type A is 75% of the table load, skewed type B is 50% of the table load, top flange offset 30% of the table load.
  5. Top flange bent closed is not available for HWP or HWPH.
WP 1.0 1.0 1.0 1.0 1.0 1.0 (90-a)/90 (90-a)/90 0.5 0.5 0.25 0.3 By more than 1/2": 0.50
By 1/2" or less: 1.00"
HWP 0.8 N/A 0.8 0.5 0.6 0.5 0.6 N/A
HWPH 0.8 0.7 0.5
Reduction Factor Instructions

Allowable Download =
  (lowest of Seat, Top Flange, or Joist Height) x (Table Load).
Allowable Uplift =
  as noted in table per height, see table above.


Typical WP Top Flange Offset Left
Typical WP Top Flange
Offset Left
Typical WP Skewed Left Type B Hanger
Typical WP
Top Flange Sloped Down
Left with Low Side Flush
Typical WP Ridge Installation
WP Skewed Left
Type B Hanger
(square-cut joist shown)
Typical WP Skewed Right Low Side Flush
Typical WP Skewed Right Center Flush
Typical WP Skewed Right High Side Flush
Typical WP sloped down, skewed right with type A hanger (joist end must be bevel cut).
When ordering, specify low side flush, center flush or high side flush.

Code Reports & Compliance