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THAC Truss Hanger Adjustable with Concealed Flanges

Top-Flange Hangers for Plated Truss

This product's information may differ depending on the category of use. You are currently viewing details related to Top-Flange Hangers for Plated Truss. You can also view product information related to the category: Face-Mount Hangers for Plated Truss

The THAC is a wood connector designed to support trusses and beams. This versatile U-shaped truss hanger features long, straight straps for applications where the height location of the truss needs to be adjustable. The field-adjustable THAC features concealed flanges for applications in restricted spaces.

Key Features

  • Can be used for top-flange or face-mount installation
  • Extra-long straps for height adjustability and top-flange installation convenience
  • Min./max. nailing installation options

Material

  • See table

Finish

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

Installation

  • Use all specified fasteners; see General Notes.

The following installation methods may be used:

  • Top-FIange Installation —The straps must be field formed over the header 2" minimum. 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 all top-flange max conditions, nails used for joist attachment must be driven at an angle so that they penetrate through the joist and into the header. For top-flange min installations, straighten the double-shear nailing tabs and install the nails straight into the joist. Top-flange max installations require full backing to allow for joist slanted fasteners to be properly installed.
  • Face-Mount (Min.) Installation — Install face nails according to the table, with at least half of the required fasteners in the top half of the header. Not all nail holes in the straps will be filled. Nails must have a minimum 1/2" distance from the edge. For nailer and truss-to-truss installation, straighten the double-shear nailing tabs and install the joist nails straight into the joist. The face-mount (min.) installation option accommodates conditions where the supported member hangs either partially or entirely below the header.
  • Face-Mount (Max.) Installation — Install face nails according to the table. Not all nail holes in the straps will be filled. The lowest four face holes must be filled. If needed, the straps may be bent over the top of the carrying member. The required face nail quantity from the table may be distributed between the face and top of the header. Nails used for the joist attachment must be driven at an angle so they completely penetrate the corner of the joist into the header.

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Product Information Table

Fastener Production Information and Stuff & Things
Model No. Joist Size Ga. W (in.) H (in.) Coating/Material Packaging Qty.
THAC418 4x18 16 3 5/8 17 1/2 Zinc Galvanized, G90 1
THAC422 4x22 16 3 5/8 22 Zinc Galvanized, G90 1
THAC422-2 Double 4x22 14 7 1/4 22 11/16 Zinc Galvanized, G90 1
THAC426 4x26 14 3 5/8 26 Zinc Galvanized, G90 1
THAC426-2 Double 4x26 14 7 1/4 26 1/16 Zinc Galvanized, G90 1

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.

Model No. Ga. Dimensions (in.) Min. Header Depth (in.) Fasteners (in.) DF/SP Allowable Loads SPF/HF Allowable Loads
W H C Carrying Member Carried Member Uplift (160) Floor (100) Snow (115) Roof
(125)		 Wind (160) Uplift (160) Floor (100) Snow (115) Roof
(125)		 Wind (160)
Top Face
Top-Flange Installation3
THAC418 min 16 3 5/8 17 1/2 7 7/8 — (4) 0.162 x 3 1/2 (2) 0.162 x 3 1/2 (6) 0.148 x 3 — 2,245 2,245 2,245 2,245 — 1,835 1,835 1,835 1,835
THAC418 max 11 1/4 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 3,670 3,670 3,670 3,670 1,670 2,790 2,790 2,790 2,790
THAC422 min 16 3 5/8 22 7 7/8 — (4) 0.162 x 3 1/2 (2) 0.162 x 3 1/2 (6) 0.148 x 3 — 2,245 2,245 2,245 2,245 — 1,835 1,835 1,835 1,835
THAC422 max 11 1/4 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 3,670 3,670 3,670 3,670 1,670 2,790 2,790 2,790 2,790
THAC426 min 14 3 5/8 26 7 7/8 — (4) 0.162 x 3 1/2 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 — 2,870 2,870 2,870 2,870 — 2,270 2,270 2,270 2,270
THAC426 max 11 1/4 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 3,755 3,755 3,755 3,755 1,670 2,945 2,945 2,945 2,945
THAC422-2 min 14 7 1/4 22 11/16 9 3/4 — (4) 0.162 x 3 1/2 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 — 3,330 3,330 3,330 3,330 — 2,465 2,465 2,465 2,465
THAC422-2 max 11 1/4 (4) 0.162 x 3 1/2 (8) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 4,210 4,210 4,210 4,210 1,670 3,285 3,285 3,285 3,285
THAC426-2 min 14 7 1/4 26 1/16 9 3/4 — (4) 0.162 x 3 1/2 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 — 3,330 3,330 3,330 3,330 — 2,465 2,465 2,465 2,465
THAC426-2 max 11 1/4 (4) 0.162 x 3 1/2 (8) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 4,210 4,210 4,210 4,210 1,670 3,285 3,285 3,285 3,285
Face-Mount (Max.) Installation4
THAC418 16 3 5/8 17 1/2 7 7/8 14 1/16 — (22) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 3,695 3,695 3,695 3,695 1,670 3,330 3,535 3,535 3,535
THAC422 16 3 5/8 22 7 7/8 14 1/16 — (22) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 3,695 3,695 3,695 3,695 1,670 3,330 3,535 3,535 3,535
THAC426 14 3 5/8 26 7 7/8 16 1/16 — (30) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 4,315 4,315 4,315 4,315 1,670 3,225 3,225 3,225 3,225
THAC422-2 14 7 1/4 22 11/16 9 3/4 16 3/16 — (30) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 5,160 5,520 5,520 5,520 1,670 4,440 5,010 5,0105 5,010
THAC426-2 14 7 1/4 26 1/16 9 3/4 18 — (38) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,855 5,520 5,520 5,520 5,520 1,670 5,010 5,010 5,010 5,010
  1. Uplift loads have been increased for earthquake or wind loading with no further increase allowed. Reduce where other loads govern.
  2. Wind (160) is a download rating.
  3. Top-flange installation loads are based on a minimum two-ply 2x carrying member. For top flange (min.) installation on 4x2 truss carrying members with double top chords, use the specified fasteners for full tabulated values; for single 4x2 top chord or nailer applications, refer to the Nailer Table.
  4. Face-mount installation loads are based on a two-ply 2x carrying member minimum. For single 2x carrying members, use 0.148" x 1 1/2" nails in the carrying member and tabulated fasteners in 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. Refer to installation instructions regarding fastener installation into carried (joist) member. Based on the installation condition, nails will be installed either straight with straighted double-shear nailing tabs or slanted.
  6. 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.

Nailer Table

Model No. Nailer Top Nailing (in.) Face Nailing (in.) Joist Nailing (in.) Allowable Loads (100/115/125)
DF/SP SPF/HF
THAC418/ THAC422 2x (4) 0.148 x 1 1/2 (2) 0.148 x 1 1/2 (6) 0.148 x 1 1/2 1,335 1,245
(4) 0.148 x 1 1/2 (2) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 1,415 1,245
(2) 2x (4) 0.148 x 3 (2) 0.148 x 3 (6) 0.148 x 3 1,835 1,680
4x (4) 0.162 x 3 1/2 (2) 0.162 x 3 1/2 (6) 0.148 x 3 2,245 1,930
THAC426 2x (4) 0.148 x 1 1/2 (2) 0.148 x 1 1/2 (6) 0.148 x 1 1/2 1,785 1,360
(4) 0.148 x 1 1/2 (2) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 2,255 1,940
(2) 2x (4) 0.148 x 3 (2) 0.148 x 3 (6) 0.148 x 3 1,735 1,680
4x (4) 0.162 x 3 1/2 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 2,435 2,095
THAC422-2/ THAC426-2 2x (4) 0.148 x 1 1/2 (2) 0.148 x 1 1/2 (6) 0.148 x 1 1/2 1,375 1,325
(8) 0.148 x 1 1/2 (2) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 2,345 2,015
(2) 2x (4) 0.148 x 3 (4) 0.148 x 3 (6) 0.148 x 3 1,970 1,970
4x (4) 0.162 x 3 1/2 (4) 0.162 x 3 1/2 (6) 0.162 x 3 1/2 3,330 2,865
  1. Loads for 2x Nailers are applicable to single 4x2 top chord carrying members provided:
    1) the hanger is located at a top chord panel point; 2) there is no splice at that panel point location;
    3) the floor truss girder must have adequate lateral bracing to prevent excessive displacement due to secondary torsional stresses (refer to ANSI/TPI 1-2014, Section 7.5.3.5).
  2. Attachment of nailer to supporting member is the responsibility of the designer.
  3. Refer to table above for hanger dimensions, minimum top flange requirements and additional footnotes.

Allowable Loads for Face-Mount (Min.) Nailing Installation

Allowable Loads for Face-Mount (Min.) Nailing Installation
Model No. Ga. Dimensions (in.) Fasteners (in.) Allowable Loads (lb.)
W H Header (Face)4 Joist DF/SP SPF/HF
Floor (100) Snow (115) Roof (125) Floor (100) Snow (115) Roof (125)
THAC418 16 3 5/8 17 1/2 (20) 0.148 x 3 (6) 0.148 x 1 1/2 2,440 2,485 2,485 2,100 2,140 2,140
THAC422 16 3 5/8 22 (20) 0.148 x 3 (6) 0.148 x 1 1/2 2,440 2,485 2,485 2,100 2,140 2,140
THAC426 14 3 5/8 26 (30) 0.148 x 3 (6) 0.148 x 1 1/2 3,225 3,225 3,225 2,770 2,770 2,770
  1. Loads are based on a min. 2-ply 2x carrying member. 0.148" x 2 1/2" nails may be used instead of the specified 10d commons at 1.00 of the table load. For single-ply 2x or 1 3/4" wide carrying members, use 0.148" x 1 1/2" nails and use 0.77 of the table value. Alternately, #9 x 1 1/2" Strong-Drive® SD Connector screws may be used in place of the specified header and joist nails for full table loads.
  2. The joist nails should be installed straight into the carried member by straightening the THAC double shear nailing tabs.
  3. At least half of the face fasteners must be installed into the upper half of the header, unless some other means of mechanical reinforcement is used to resist the tension perpendicular to grain stresses. Nails must have a minimum 1/2" edge distance.
  4. For installations with fewer face fasteners than specified, reduce the allowable load as follows:
    Allowable load = No. of Face Nails Used/No. Face Nails in Table x Table Load
  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 Connectors.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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