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THA/THAC Adjustable Truss Hangers

THA/THAC

The THA series have extra long straps that can be field-formed to give height adjustability and top-flange hanger convenience. THA hangers can be installed as top-flange or face-mount hangers.

THA4x and THA2x-2 models feature a dense nail pattern in the straps, which provides more installation options and allows for easy top-flange installation.

Material

  • See table

Finish

  • Galvanized. Some products available in ZMAX® coating. See Corrosion Information.

Installation

  • Use all specified fasteners; see General Notes.

The following installation methods may be used:

  • Top-Flange Installation — The straps must be field formed over the header — see table for minimum top-flange requirements. Install top and face nails according to the table. Top nails shall not be within 1/4" from the edge of the top-flange members. For the THA29, nails used for joist attachment must be driven at an angle so that they penetrate through the corner of the joist and into the header. For all other top-flange installations, straighten the double-shear nailing tabs and install the nails straight into the joist.
  • Face-Mount Installation — Install all face nails according to the table. Not all nail holes will be filled on all models. On models where there are more nail holes than required, the lowest four face holes must be filled. Nails used for the joist attachment must be driven at an angle so that they penetrate through the corner of the joist into the header.
  • Alternate Installation — The THA 4x hangers may be installed in a top-flange configuration using the tabulated fasteners for face-mount installation and achieve the face-mount installation loads. Install the tabulated face nails into the face and top of the carrying member. Nails used for the joist attachment must be driven at an angle so that they penetrate through the corner of the joist into the header.
  • Uplift — Lowest face nails must be filled to achieve uplift loads.

Options

  • THA hangers available with the header flanges turned in for 3 5/8" (except THA413) and larger, with no load reduction — order THAC hanger.

Related Literature

Load Tables

    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.

  1. Uplift has been increased 60% for wind or earthquake loading with no further increase allowed; reduce where other loads govern.
  2. Wind (160) is a download rating.
  3. For single 4x2 top chord carrying members or single 2x nailers, the following THA hangers can be installed using 10d x 1 1/2" top nails and (2) 16d face nails with reduced allowable loads as noted: THA418/THA422: 1,415 lb. for DF/SP, 1,215 lb. for SPF; THA426: 2,245 lb. for DF/SP, 1,930 lb. for SPF; THA422-2/THA426-2: 2,345 lb. for DF/SP, 2,015 lb. for SPF. Loads are based on hanger installations at panel points.
  4. Face-mount installation loads are based on minimum of 2-ply 2x carrying member. For single 2x carrying members, use 10d x 1 1/2" nails into the carrying member and tabulated fasteners into the carried member, and use 0.80 of the table value for 18 gauge, and 0.68 of the table value for 16 gauge and 14 gauge.
  5. Min. Top Flange refers to the minimum length of strap that must be field formed over the header.
  6. For the THA 2x models, one strap may be installed vertically according to the face mount nailing requirements and the other strap wrapped over the truss chord according to the top flange nailing requirements (see drawing Typical THA29 - Top Flange Installation below) and achieve full tabulated top flange installation loads.
  7. Nails: 16d = 0.162" dia. x 3 1/2" long, 10d = 0.148" dia. x 3" long, 10d x 1 1/2" = 0.148" dia. x 1 1/2" long.
    See other nail sizes and information.
Typical THA29 Top Flange Installation
Typical THA29
Top Flange Installation

Code Reports

Part IAPMO UES ER ICC-ES ESR City of Los Angeles State of Florida
THA213 ESR-2551 ESR-2523 RR25804 FL10447
THA218 ESR-2551 ESR-2523 RR25804 FL10447
THA218-2 ESR-2551 ESR-2523 RR25804 FL10447
THA222-2 ESR-2551 ESR-2523 RR25804 FL10447
THA29 ESR-2551 ESR-2523 RR25804 FL10447
THA413 ESR-2551 ESR-2523 RR25804 FL10447
THA418 ESR-2551 ESR-2523 RR25804 FL10447
THA422 ESR-2551 ESR-2523 RR25804 FL10447
THA422-2 FL11468
THA422Z ESR-2551 ESR-2523 FL10447
THA426 FL11468
THA426-2 FL11468
THAC418 ESR-2551 ESR-2523 RR25804 FL10447
THAC422
THAC422-2No code listing: Please contact us for test data.
THAC426 No code listing. Please contact us for test data.
THAC426-2 No code listing. Please contact us for test data.

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

Drawings

Part Orthographic Perspective
THA213
THA213
DWGDXF
THA213 front view
DWG DXF
THA213 left view
DWG DXF
THA213 right view
DWG DXF
THA213 top view
DWG DXF
None
THA218
THA218
DWGDXF
THA218 front view
DWG DXF
THA218 left view
DWG DXF
THA218 right view
DWG DXF
THA218 top view
DWG DXF
Truss/Rafter to Masonry/Concrete Connectors
DWG DXF
Truss/Rafter to Wood Top Plate 1
DWG DXF
THA218-2
THA218-2
DWGDXF
THA218-2 front view
DWG DXF
THA218-2 left view
DWG DXF
THA218-2 right view
DWG DXF
THA218-2 top view
DWG DXF
None
THA222-2
THA222-2
DWGDXF
THA222-2 front view
DWG DXF
THA222-2 left view
DWG DXF
THA222-2 right view
DWG DXF
THA222-2 top view
DWG DXF
High Wind-Resistant Construction D8: Girder/Truss to Wood Wall Framing
DWG DXF
Girder/Truss to Concrete Connections 1
DWG DXF
THA29
THA29
DWGDXF
THA29 front view
DWG DXF
THA29 left view
DWG DXF
THA29 right view
DWG DXF
THA29 top view
DWG DXF
THA29
DWG DXF
THA413
THA413
DWGDXF
THA413 front view
DWG DXF
THA413 left view
DWG DXF
THA413 right view
DWG DXF
THA413 top view
DWG DXF
None
THA418
THA418
DWGDXF
THA418 front view
DWG DXF
THA418 left view
DWG DXF
THA418 right view
DWG DXF
THA418 top view
DWG DXF
None
THA422
THA422
DWGDXF
THA422 front view
DWG DXF
THA422 left view
DWG DXF
THA422 right view
DWG DXF
THA422 top view
DWG DXF
None
THA422-2
THA422-2
DWGDXF
THA422-2 front view
DWG DXF
THA422-2 left view
DWG DXF
THA422-2 right view
DWG DXF
THA422-2 top view
DWG DXF
None
THA422ZNone None
THA426
THA426
DWGDXF
THA426 front view
DWG DXF
THA426 left view
DWG DXF
THA426 right view
DWG DXF
THA426 top view
DWG DXF
High Wind-Resistant Construction D50: Floor to Masonry/Concrete
DWG DXF
THA426-2
THA426-2
DWGDXF
THA426-2 front view
DWG DXF
THA426-2 left view
DWG DXF
THA426-2 right view
DWG DXF
THA426-2 top view
DWG DXF
None
THAC418
THAC418
DWGDXF
THAC418 front view
DWG DXF
THAC418 left view
DWG DXF
THAC418 right view
DWG DXF
THAC418 top view
DWG DXF
None
THAC422
THAC422
DWGDXF
THAC422 front view
DWG DXF
THAC422 left view
DWG DXF
THAC422 right view
DWG DXF
THAC422 top view
DWG DXF
None
THAC422-2
THAC422-2
DWGDXF
THAC422-2 front view
DWG DXF
THAC422-2 left view
DWG DXF
THAC422-2 right view
DWG DXF
THAC422-2 top view
DWG DXF
None
THAC426
THAC426
DWGDXF
THAC426 front view
DWG DXF
THAC426 left view
DWG DXF
THAC426 right view
DWG DXF
THAC426 top view
DWG DXF
None
THAC426-2
THAC426-2
DWGDXF
THAC426-2 front view
DWG DXF
THAC426-2 left view
DWG DXF
THAC426-2 right view
DWG DXF
THAC426-2 top view
DWG DXF
None