Use and Care Manual

332
Copyright © 2020 MiTek Industries, Inc. All Rights Reserved
Cold-Formed Steel Connectors
CFS Connectors
MiTek
®
Product Catalog
DTB/S Holdown
Ref. No. W L D CL Qty Dia. (in) Qty Type 100% 160%
DTB/S-TZ S/DTT2Z 14 1-13/16 6 2-1/4 1-1/8 1 1/2 8 #14 18 Ga 1655 1655 --
1) Use ASTM A307 bolt or threaded rod with cut washer and nut.
2) Designer shall specify steel-to-steel self-tapping screw with a minimum nominal shear strength 2,600 lbs.
3) Allowable loads include a 60% increase for wind or seismic load conditions. No further increase shall be permitted.
4) Allowable load values of the holdown (tie-down) device are a measure of the strength of the assembly with a safety
factor of 3.0 applied to the lowest maximum test load.
5) Fasteners shall be specified and installed per manufacturer's specifications.
6) CFS stud must be a minimum 18 Ga and Grade 33.
7) #14 screws are ITW Buildex 1/4-14 HWH Teks Structural Fasteners with a nominal diameter of 0.250".
Self-drilling tapping screws with equivalent physical and strength properties may be used.
Code
Ref.
Allowable
Tension Loads (Lbs.)
3,4
MiTek USP
Stock No.
Steel
Gauge
Dimensions (in)
Minimum
CFS Stud
6
Fastener Schedule
5
Anchor Bolt
1
Screws
2,7
The DTB/S-TZ may be used to resist tension loads installed to CFS members.
Materials: 14 gau ge
Finish: G-185 galvanizing
Installation:
• Use all specied fasteners.
• Install screws to attach DTB/S-TZ to framing member rst.
• Install with MiTek’s THR 1/2" threaded rod or equivalent.
• Tighten anchor bolt nuts nger tight to base plus 1⁄3 to 1⁄2
additional turns with wrench.
DTB/S-TZ
L
D
CL
W