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HTT Heavy Tension Tie

HTT

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Holdowns and Tension Ties

This product's information may differ depending on the category of use. You are currently viewing details related to Holdowns and Tension Ties. You can also view product information related to the category: Tension Ties

The HTT is designed to resist medium tension loads that are fastened with #10 screws. This single-piece formed heavy tension tie has a four-ply formed seat, is designed without rivets and does not require washers. This tension tie provides high-strength, post-pour, concrete-to-steel connections.

Key Features

  • Ideal for retrofit or new construction projects
  • Can be installed with cast-in-place or post-installed anchor bolts
  • Four-ply formed steel provides increased tension capacity
  • Anchor bolt washers not required

Material

  • See table

Finish

  • Galvanized. May be ordered HDG; contact Simpson Strong-Tie.

Installation

  • Use all specified fasteners.
  • Use the specified number and type of screws to attach the strap portion to the steel stud. Bolt the base to the wall or foundation with a suitable anchor; see table for the required bolt diameter.
  • See SB and SSTB anchor bolts for anchorage options.
  • See SET-XP® and AT-XP® adhesive products for anchor bolt retrofit options.

Related Literature

Connectors for Cold-Formed Steel Construction Catalog
C-CF-2020
A catalog for Connectors for Cold-Formed Steel Construction products and solutions.
Catalog
Wood Construction Connectors 2021-2023
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A catalog including new product information as well as any applicable specification and installation instructions for wood-to-wood and wood-to-concrete structural connectors.
Catalog
Conectores para la construcción con madera 2021–2023
C-C-2021SP
El catálogo incluye información sobre nuevos productos, así como especificaciones e instrucciones de instalación aplicables para conectores estructurales de madera a madera y de madera a concreto.
Catalog
High Wind Guide
F-C-HWG20
A comprehensive guide to help Designers select the most appropriate connections for challenging, high-wind regions.
Product Guide
Soft-Story Retrofit Solutions for Northern California
F-L-20NCSSR20
A flier offering a variety of Simpson Strong-Tie® state-of-the-art structural retrofit solutions specifically designed to meet recent Northern California soft-story retrofit mandates.
Flier
ASCE 41 Values
TEB-ASCE4122
Connector and anchor Strength Design capacities for retrofits designed in accordance with ASCE 41.
Technical Bulletin
Code-Compliant Guardrail Post Connections
T-C-GRDRLPST20
A technical bulletin featuring details and illustrations for code-compliant 36" and 42" guardrail post connections.
Technical Bulletin
Connector Solutions to Meet the Wall Bracing Requirements of the International Residential Code®
T-C-WALLBRACE21
A technical bulletin providing technical information about wall bracing methods and code sections that require connectors (e.g., holdowns or straps) and anchors.
Technical Bulletin
Connectors Installed on SCL Columns
T-C-SCLCLM21
A technical bulletin discussing the structural properties of the two different surface sides of SCL columns.
Technical Bulletin
Connectors Installed on SCL Columns
T-C-SCLCLMCAN20
A Canadian Limit States technical bulletin addressing typical installations of Simpson Strong-Tie® connectors on SCL columns as well as reduction factors for narrow-face SCL installations.
Technical Bulletin
Raised Holdowns with CFS
L-CF-RAISEDHD22
Raised Simpson Strong-Tie® holdowns in wood-sheathed cold-formed steel framed shearwalls.
Engineering Letter
Simpson Strong-Tie® Holdowns on Cross-Laminated Timber Panels
L-C-HDCLT21
Simpson Strong-Tie evaluated the HDQ/HHDQ, HDU and HTT holdowns in cross-laminated timber (CLT) panel applications installed with SD and SDS screws.
Engineering Letter

Load Tables

  These products are available with additional corrosion protection.

  1. The designer shall specify the foundation anchor material type, embedment and configuration.
  2. Stud design by specifier. Tabulated loads are based on a minimum stud thickness for fastener connection.
  3. Deflection at ASD or LRFD includes fastener slip, holdown deformation and anchor rod elongation for holdowns installed up to 4" above top of concrete. Holdowns may be installed raised, up to 18" above top of concrete, with no load reduction provided that additional elongation of the anchor rod is accounted for. See S/HDU holdown for installation detail.
  4. The Nominal Tension Load is based on the tested average ultimate (peak) load and is provided for design in accordance with section C5 of AISI S213 that requires a tension tie to have a nominal strength to resist the lesser of the amplified seismic load or the maximum force the system can deliver.
  5. See Fastening Systems for more information on Simpson Strong-Tie fasteners.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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