Product Description
The Simpson Strong-Tie LTTI31 LTT 31 in. 18-Gauge Light Tension Tie from Simpson Strong-Tie is engineered to resist tension loads when attaching wood to concrete or masonry walls. Designed primarily for horizontal purlin applications and suitable for vertical holdown applications as well, the LTTI31 model is specifically built for wood-chord open-web truss attachments and features a built-in load transfer plate washer for increased performance. Made in the United States from 18-gauge steel with a G90 galvanized coating, this light tension tie delivers reliable, code-compliant performance in demanding structural applications.
Key Features
- Nailing patterns to accommodate different purlin/rafter/truss types
- Low-profile seat to reduce visibility of tie
- Tested with different anchor bolt diameters to meet code-required applications based on substrate
- Built-in load transfer plate washer for increased performance on wood-chord open-web truss attachments
- May be installed vertically on a minimum 2x6 stud with nails
- For applications with unreinforced concrete masonry, 3/4 in. post-installed anchor bolts are commonly used
- Galvanized (G90) for extra corrosion resistance
- Made from 18-gauge steel
Specifications
- MPN: LTTI31
- Brand: Simpson Strong-Tie
- Length: 31 in.
- Width: 3-3/4 in.
- Gauge: 18
- Coating: Zinc Galvanized, G90
- Finish: Zinc Galvanized, G90
- Country of Origin: United States
Approved Applications
- Horizontal purlin applications for resisting tension loads
- Vertical holdown applications
- Wood-chord open-web truss attachments
- Attaching wood to concrete or masonry walls
- Applications with unreinforced concrete masonry using 3/4 in. post-installed anchor bolts
Install With
- Install with (1) 5/8 in. anchor bolt and (18) 0.148 in. x 1-1/2 in. nails
Frequently Asked Questions
- What is the Simpson Strong-Tie LTTI31 designed for?
- The LTTI31 is a light tension tie designed for horizontal purlin applications and may also be used for vertical holdown applications. It is specifically built for wood-chord open-web truss attachments and is used to resist tension loads when attaching wood to concrete or masonry walls.
- What hardware is required to install the LTTI31?
- The LTTI31 should be installed with (1) 5/8 in. anchor bolt and (18) 0.148 in. x 1-1/2 in. nails. It may be installed vertically on a minimum 2x6 stud with nails.
- What gauge steel is used, and what corrosion protection does the LTTI31 have?
- The LTTI31 is made from 18-gauge steel and features a Zinc Galvanized G90 coating for extra corrosion resistance, making it suitable for applications where durability against the elements is important.
- What anchor bolt size is commonly used with the LTTI31 in unreinforced concrete masonry applications?
- For LTT tension tie applications with unreinforced concrete masonry, 3/4 in. post-installed anchor bolts are commonly used. The LTTI31 has been tested with different anchor bolt diameters to meet code-required applications based on substrate.
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