www.strongtie.com


>>Home   > All Products - Alphabetical List

HDU/DTT Holdowns


Installation

View step-by-step installation instructions
Connector-Anchor Selector Web App

HDU Holdowns are pre-deflected during the manufacturing process, virtually eliminating deflection under load due to material stretch. They use Simpson Strong-Tie® Strong-Drive® SDS Heavy-Duty Connector screws which install easily, reduce fastener slip and provide a greater net section when compared to bolts.

The HDU series of holdowns are designed to replace previous versions of the product such as PHD's as well as bolted holdowns. The HDU2, 4 and 5 are direct replacements for the PHD2, 5 and 6, respectively.

The DTT tension ties are designed for lighter-duty holdown applications on single or 2x posts. The new DTT1Z is installed with nails or Simpson Strong-Tie Strong-Drive SD Connector screws and the DTT2Z installs easily with the Strong-Drive SDS Heavy-Duty Connector screws (included). The DTT1Z holdowns have been tested for use in designed shearwalls and prescriptive braced wall panels as well as prescriptive wood-deck applications (see DTT Deck Tension Ties for deck applications).

For more information on holdown options, contact Simpson Strong-Tie.

HDU Special Features:

Material: See table.

Finish: HDU – Galvanized; DTT1Z and DTT2Z – ZMAX® coating; DTT2SS - stainless steel

Installation:

For holdowns, per ASTM test standards, anchor bolt nut should be finger-tight plus 1/3 to 1/2 turn with a hand wrench, with consideration given to possible future wood shrinkage. Care should be taken to not over-torque the nut. Impact wrenches should not be used

top Gallery:
  roll over images below to see larger image
 
 
HDU
U.S. Patents
6,112,495 and 5,979,130
DTT2Z
U.S. Patent 8,555,580
  DTT1Z
U.S. Patent Pending
   
Vertical HDU Installation   Typical HDU Tie Between Floors   Horizontal HDU Offset Installation
(Plan View)
See Holdown and Tension Tie General Notes.

top Load Table:See code report listings below
Additional Corrosion Protection

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.

Table
  1. See Holdown and Tension Tie General Notes.
  2. Noted HDU14 allowable loads are based on a 5 1/2" wide post (6x6 min.).
  3. HDU14 requires heavy hex anchor nut to achieve tabulated loads (supplied with holdown).
  4. Loads are applicable to installation on either narrow or wide face of post.
next  top Code Reports (PDFs):
Legacy Reports
  IAPMO UES ER ICC-ES ESR CITY OF LOS ANGELES STATE OF FLORIDA ICC-ES NER ICC-ES ER ICC-ES ES
DTT1Z No code listing. Please contact us for test data.
DTT2Z  ESR-2330 / ESR-2523 * RR25720 FL10441      
DTT2Z-SDS2.5  ESR-2330 / ESR-2523 * RR25720 FL10441      
HDUSee specific model numbers for code listings.
HDU11-SDS2.5  ESR-2330 / ESR-2523 * RR25720 FL10441      
HDU14-SDS2.5  ESR-2330 / ESR-2523 * RR25720 FL10441      
HDU2-SDS2.5  ESR-2330 / ESR-2523 * RR25720 FL10441      
HDU4-SDS2.5  ESR-2330 / ESR-2523 * RR25720 FL10441      
HDU5-SDS2.5  ESR-2330 / ESR-2523 * RR25720 FL10441      
HDU8-SDS2.5  ESR-2330 / ESR-2523 * RR25720 FL10441      

* 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

top


next  topDrawings: To download drawings, right-click or Ctrl-click on the link, then choose "Save Target As..."
Download the Simpson Strong-Tie® AutoCAD® Menu, which allows you to insert Ortho views directly into your AutoCAD drawing.

 ORTHOGRAPHIC
PERSPECTIVE
DTT1Z DTT1Z bottom view: DWG | DXF
DTT1Z front view: DWG | DXF
DTT1Z left view: DWG | DXF
DTT1Z right view: DWG | DXF
DTT1Z top view: DWG | DXF
DTT1Z: DWG | DXF
DTT2Z DTT2Z: DWG | DXF
DTT2Z front view: DWG | DXF
DTT2Z left view: DWG | DXF
DTT2Z right view: DWG | DXF
DTT2Z top view: DWG | DXF
High Wind-Resistant Construction D61: Stemwall/Crawlspace: DWG | DXF
DTT2Z: DWG | DXF
DTT2Z installed: DWG | DXF
HDUNone for this model None for this model
HDU11 HDU11: DWG | DXF
HDU11 front view: DWG | DXF
HDU11 right view: DWG | DXF
HDU11 top view: DWG | DXF
None for this model
HDU14 HDU14: DWG | DXF
HDU14 front view: DWG | DXF
HDU14 left view: DWG | DXF
HDU14 right view: DWG | DXF
HDU14 top view: DWG | DXF
None for this model
HDU2 HDU2: DWG | DXF
HDU2 front view: DWG | DXF
HDU2 right view: DWG | DXF
HDU2 top view: DWG | DXF
High Wind-Resistant Construction D46: Stud to Band Joist: DWG | DXF
High Wind-Resistant Construction D9: Girder/Truss to Wall Framing: DWG | DXF
HDU4 HDU4: DWG | DXF
HDU4 front view: DWG | DXF
HDU4 right view: DWG | DXF
High Wind-Resistant Construction D8: Girder/Truss to Wall Framing: DWG | DXF
HDU5 HDU5: DWG | DXF
HDU5 front view: DWG | DXF
HDU5 right view: DWG | DXF
High Wind-Resistant Construction D101: Holdowns: DWG | DXF
High Wind-Resistant Construction D21: Girder/Truss To Masonry/Concrete: DWG | DXF
High Wind-Resistant Construction D49: Floor to Masonry/Concrete: DWG | DXF
HDU8 HDU8: DWG | DXF
HDU8 front view: DWG | DXF
HDU8 right view: DWG | DXF
None for this model

   
top
Order free catalogs by mail
top top top top
Fliers (PDFs):
top top
Printed from
© 2014 Simpson Strong-Tie Company Inc.