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WP/HWP/HWPH/WMU Purlin Top-Flange Hangers


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The WP, HWP and HWPH series purlin hangers offer the greatest design flexibility and versatility. WMUs are designed for use on standard 8"-grouted masonry block wall construction.

The HWP and HWPH high-wind purlin hangers have enhanced uplift. They are ideal for high-wind applications.


  • (Top flange /stirrup): WP — 7 /12 gauge; HWP — 7 /12 gauge; HWPH — 3 / 7 gauge


  • Simpson Strong-Tie gray paint; hot-dip galvanized available: specify HDG, contact Simpson Strong-Tie


  • Use all specified fasteners.
  • H dimensions are sized to account for normal joist shrinkage. W dimensions are for dressed timber widths.
  • WP/HWP/HWPH hangers may be welded to steel headers with a minimum 1 1/2"-long fillet weld on each side of the top flange to the header. Weld sizes: WP = 3/16", HWP = 3/16", HWPH = 1/4" (see General Instructions for the Installer, note k for welding information). Weld-on applications achieve maximum allowable download. Uplift loads do not apply to this application. For uplift loads, refer to technical bulletin T-C-WELDUPLFT.
  • Hangers can support multi-ply carried members; the individual members must be secured together to work as a single unit before installation into the hanger.
  • If joist is shorter than hanger by more than 1/2", then use only 50% of the table loads.


  • See General Notes for Hanger Options.
  • Refer to technical bulletin Sloped Joist in Non-Sloped Hangers (T-C-SLOPEJST) for information regarding load reductions on selected hangers which can be used without modification to support joists which have shallow slopes (≤3/4:12).
  • Some model configurations may differ from those shown. Contact Simpson Strong-Tie for details.
  • WP models are available in Type A (bevel-cut) or Type B (square-cut) style. Contact Simpson Strong-Tie when ordering.
  • Hangers with a skew greater than 15° may have all the joist nails on the outside angle.
  • Skewed HWs have face nails and require a minimum header depth of 3 1/2".
  • 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 (see illustration).
  • Uplift loads are not available for open/closed TF, TF sloped and offset options.

Ridge Hanger (only available for WP)

  • Top flange may be sloped to a maximum of 35° to accommodate a ridge (see illustration). Specify angle of the slope. Reduce allowable load using straight-line interpolation. See Open/Closed example.

Related Literature

Load Tables

See Top Flange Hanger tables.

See Hanger Options for hanger modifications, which may result in reduced loads.

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

Nailer Table

WP/HWP/HWPH/WMU Nailer Table
  1. Attachment of nailer to supporting member is the responsibility of the Designer.

Various Header Applications

WP/HWP/HWPH/WMU Various Header Applications
  1. Code values are based on DF/SP header species.
  2. Uplift loads have been increased for wind or earthquake loading with no further increase allowed. Reduce where other loads govern.
  3. For hanger heights exceeding the joist height, the allowable load is 0.50 of the table load.
  4. HWP widths greater than 5 5/8" are not included in the code report.
  5. Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connector.

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 HWP Top View Skewed Left Type A Hanger
Typical HWP Top View
Skewed Left Type A Hanger
(bevel-cut joist shown)
Typical WP Top Flange Offset Left
Typical WP Top Flange
Offset Left
Typical WP Skewed Left Type B Hanger
Typical WP Skewed Left
Type B Hanger
(square-cut joist shown)
Typical WP Ridge Installation
Typical WP Ridge Installation
Typical WP Top Flange Sloped Down Left with Low Side Flush
Typical WP
Top Flange Sloped Down
Left with Low Side Flush
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