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AHEP Adjustable Hip-End Purlin


Spacing, Restraint and Bracing Products

This product's information may differ depending on the category of use. You are currently viewing details related to Spacing, Restraint and Bracing Products. You can also view product information related to the category: Roof Truss and Rafter Connectors, Ties, and Straps for Cold-Formed Steel Construction

For wood and cold-formed steel trusses, the Simpson Strong-Tie® AHEP is a structural purlin that also serves as an installation lateral restraint and spacer during the truss erection process. The AHEP attaches to the leading edge of step-down hip trusses, eliminating the need for drop-top chords, 2x lumber or gable end fillers. The interlocking design of the AHEP allows them to install linearly, aligned with the end jacks, to maintain framing spacing from eave to hip or peak. Roof sheathing/decking attaches directly to the purlin with knurled pneumatic fasteners or low-profile head, self-drilling screws. Adjustable in length, the AHEP is designed to accommodate a pitch range of 3/12 to 9/12 as a structural purlin and up to 12/12 as an installation lateral restraint and spacer.

Key Features

  • A structural purlin to which sheathing can be directly attached — no need to remove temporary bracing
  • Accurately spaces the installed trusses and helps meet the temporary top-chord lateral restraint recommendations of WTCA/TPI BCSI on step-down hip ends
  • Adjustable in length to accommodate a wide pitch range


  • 20 gauge (33 mil)


  • Galvanized


  • Use all specified fasteners; see General Notes.
  • Prior to installation, the AHEP must be set to the proper length and the two tubes fastened together with four #10 x 3/4" self-drilling screws through the round holes in the side flanges for pitches between 3/12 and 9/12; and in the triangular and upper round hole when the AHEP will be used as an installation restraint and spacer at pitches 9/12 up to 12/12.
  • For trusses spaced 24" o.c., the pitch markings on the inner tube may be used to line up the tubes to the correct length for a given pitch. For other spacings, the length of the AHEP must be set to the calculated sloping length (from leading edge to leading edge of the framing members).
  • To install the AHEPs on wood trusses, use four 10d (0.148" x 3") nails. The two nails at the bottom of the part (the yoke end) must be clinched.
  • Sheathing is attached to the AHEP with knurled pneumatic fasteners or low-profile-head, self-drilling screws.
  • For efficiency, the AHEPs should be installed in line with the end jacks so that framing alignment can be maintained from eave to hip/ridge.

Related Links

Wood Construction

Cold-Formed Steel Construction

Online Calculator

  • AHEP Design Calculator: Available to help Designers check AHEP applicability based on the actual hip-end roof pitch, input live and dead loads, truss and purlin spacing and the selected sheathing and deflection criteria.

Catalog Pages

Related Literature

Load Tables

AHEP Load Capacities for Wood-Truss Applications

  1. No load duration increase allowed.
  2. Allowable loads apply to wood with a specific gravity of 0.42 or greater.
  3. Designer shall insure attached members are adequately designed to resist applied loads.
  4. Straight line interpolation can be used to determine allowable loads for pitches between 3.1/12 and 9/12.
  5. Nails: 10d = 0.148 dia. x 3" long.
    Screws: #10 = #10 x 3/4" long self-drilling screws. See other nail sizes and information.

For cold-formed steel truss applications, see AHEP for Cold-Formed Steel Construction

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
AHEP ESR-2605 ESR-2523 FL10861

ESR-2523 is an Index of many of Simpson Strong-Tie Stamped and Welded Cold-formed Steel Products for Wood or Cold-formed Steel Construction


Part Orthographic Perspective
AHEP Front View
AHEP Left View
AHEP Right View