The THA series' extra long straps allow full code nailing and can be field-formed to give top-flange hanger convenience.
Designed for 4x2 floor trusses and 4x beams, the THAR/L422 has a standard skew of 45°. Straps must be bent for top-flange hanger installation. Positive-angle nailing (PAN) helps eliminate splitting of 4x2 truss bottom chords.
Galvanized. Some products available in ZMAX® coating. See Corrosion Information.
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 4 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.
Suspended Beam: Refer to engineering letter THA and Suspended Joists (L-C-THAALT).
Uplift: Lowest face nails must be filled to achieve uplift loads.
View step-by-step installation instructions in the Installer's Pocket Guide (S-C-INSTALL).
THA hangers available with the header flanges turned in for 3 5/8" (except THA413) and larger, with no load reduction — order THAC hanger
16d sinkers may be used to replace 16d commons at 0.85 of table load.
Uplift has been increased for wind or earthquake loading with no further increase allowed; reduce where other loads govern.
Roof loads are 125% of floor loads unless limited by other criteria.
THAR/L422 with (4) 10d top nails and (2) 10d face nails: when the hanger height is between 9" to 12", the allowable download is 1,440 lb. for DFL and 1,210 lb. for SPF. No further increase allowed.
For top flange installation on a nailer (see detail above), install joist nails straight by bending the double shear tabs.
For single 2x and 3x 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 DFL, 1,215 lb. for SPF; THA426: 2,245 lb. for DFL, 1,930 lb. for SPF.
Min. Top Flange refers to the minimum length of strap that must be field-formed over the header.
Nails: 16d = 0.162" dia. x 3 1/2" long, 16d x 2 1/2" = 0.162" dia. x 2 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.