Simpson HTT4 Tension Tie & Holdown Bracket

The HTT4 Tension Tie & Holdown is designed for heavy‑duty holdown applications on single or double studs and offer a solution for resisting tension loads. 

The heavy‑duty Simpson HTT4 is ideal for retrofit or new construction projects. They provide high-strength, post-pour, concrete-to-steel connections. The HTT4 is also suitable for residential and commercial projects, sub diaphragm floor, seismic upgrades, mid floor vertical connection applications. 

The HTT4 is a single-piece formed tension tie — no rivets, no welding points and a 4-ply formed seat. No washers are required. They feature an optimized nailing pattern which results in better performance with less deflection.

Material

Carbon Steel 3.1mm thick

Finish

Z275 Galvanised

Features & Benefits

• A single piece folded and no weak point of welding, provide ultimate strength tension tile
• Unique nailing pattern that provides better results with less deflection
• Stronger and safer than typical through-bolt installations for deck post connections
• Uses Strong-Drive^® SD Connector screws which install easily, reduce fastener slip and provide a greater net section area of the post compared to bolts
• Suitable for heavy duty holdown applications on single or double studs
• Helps prevent a common type of deck failure
• 17mm diameter anchor hole can accommodate Simpson Strong-Tie M12 Titen HD Screw Anchor or any M16 threaded rods
• HTT5 is suitable for steel frame holdown connections

Installation

• Use all specified fasteners
• The HTT requires no additional washer
• Strong‑Drive^® SD Connector screws install best with a low speed high torque drill with a 3/8” hex head driver

Applications

• Heavy‑duty holdown applications
• Resisting tension load applications 
• Shearwalls, studs to foundation connections
• Concrete-to-steel connections
• Retrofit or new construction projects
• Residential and commercial projects
• Sub diaphragm floor, seismic upgrades, mid floor vertical connection applications
• Engineered Wood Products (EWP)
• Cross-Laminated Timber (CLT) 
• Steel frame applications