Simpson Strong Tie Twist Strap 1200 x 30 x 2.5mm

Simpson Strong Tie Twist Strap 1200 x 30 x 2.5mm

Simpson Strong Tie Twist Strap 1200 x 30 x 2.5mm

Product Overview

The Simpson Strong Tie Twist Strap is a high-quality, light restraint strap engineered to provide reliable structural support in timber frame construction. Measuring 1200mm in length, 30mm in width, and 2.5mm in thickness, this twist strap is designed to meet rigorous building regulations including BS 5268 Part 3 and other relevant construction standards. Its purpose is to provide vertical and horizontal restraint, securely connecting timber floor and roof systems to masonry walls to ensure stability and durability in a variety of construction environments.

Boxed Weight

• Boxed Weight: 710 grams

This lightweight yet strong strap is easy to handle and install, reducing labor time without compromising on performance.

Key Features

• Light Restraint Strap:
  Specifically designed for light restraint applications in timber frame construction, ideal for vertical and horizontal load support.

• Compliance with Building Regulations:
  Manufactured to meet UK Building Regulations and BS 5268 Part 3, ensuring the strap complies with accepted construction standards for restraint in timber-to-masonry connections.

• Innovative Rolled Form Design:
  The strap’s rolled form provides enhanced strength while maintaining a lightweight profile. This innovative design offers superior performance compared to traditional flat straps.

• Versatile Restraint Options:

  • HRS and LRS Straps: Serve as alternatives to standard restraint straps, accepted by NHBC (National House Building Council).

  • HTFA and LTFA Straps: Designed to bridge a 50mm cavity and securely tie timber frames to brickwork, extending 75mm into brickwork and 300mm through the cavity.

  • Heavy and Light Restraint Variants: Heavy straps are intended for lateral restraint of roof trusses, rafters, and joists, while light restraint straps are optimized for vertical loads such as wall plates positioned atop masonry walls.

• Available Sizes:
  Common sizes ranging from 500mm to 2000mm long, available in 100mm increments, stocked for immediate supply.

• Surface Contact:
  The flat face of the rolled strap must be positioned flush against the timber to maximize contact and load transfer.

Technical Specifications

• Length: 1200mm

• Width: 30mm

• Thickness: 2.5mm

• Material: High-quality steel, formed into a rolled profile for strength and flexibility.

• Load Capacity: Designed to meet vertical and horizontal restraint requirements in accordance with relevant building codes.

Installation Guidelines

• Fasteners:
  Use all specified fasteners as outlined in the product General Notes to ensure compliance and safety.

• Positioning:
  For horizontal lateral restraint, straps should be spaced at intervals not exceeding 2 meters, secured to at least three timber members using noggings and packing to distribute load effectively.

• Fixings for Timber:
  Attach straps to timber members using four steel screws or four 4mm x 75mm round nails when used for roof applications, and two fixings per joist for floor applications.

• Bend Length:
  The bend length of the strap should be a minimum of 100mm, placed centrally on an uncut block or brick to maintain structural integrity.

• Vertical Restraint Fixing:
  Vertical straps should be at least 1 meter long. When fixed to masonry, use hardened nails (8SWG x 75mm) or wood screws (No 12 x 50mm into plugs). Number and positioning of fixings must comply with design requirements, with the lowest fixing no more than 150mm from the bottom of the strap.

Typical Applications

• Timber Frame Buildings:
  Ideal for connecting timber floor joists and roof trusses to masonry walls to provide essential vertical and lateral restraint.

• Roof and Floor Systems:
  Ensures structural stability by securing roof rafters and floor systems against lateral movement and uplift forces.

• Wall Plate Restraint:
  Provides vertical restraint for wall plates installed on masonry walls, helping prevent uplift or lateral displacement under load.

Frequently Asked Questions (FAQ)

Q1: What is the primary use of the Simpson Strong Tie Twist Strap?
A1: It is used to provide both vertical and horizontal restraint in timber-to-masonry connections, securing roof and floor framing systems to masonry walls.

Q2: How does the rolled form design benefit the strap?
A2: The rolled form design increases strength and durability while keeping the strap lightweight and easier to handle compared to flat straps.

Q3: What fasteners are recommended for installation?
A3: Use four steel screws or 4mm x 75mm round nails for roof applications, and two fixings per joist for floor applications. For masonry, hardened nails or wood screws with plugs are recommended.

Q4: Can the strap be used for both light and heavy restraint?
A4: Yes, different variations such as HRS and LRS are for light restraint, while heavy restraint straps are designed for more demanding lateral load applications like roof trusses.

Q5: What building codes or standards does this product comply with?
A5: The twist strap complies with UK Building Regulations, BS 5268 Part 3, and is accepted by NHBC for use in residential construction.

Q6: How should the strap be positioned during installation?
A6: The flat face of the strap must be installed flush against the timber surface for optimal load transfer and structural performance.

Q7: What sizes are available?
A7: The strap is available in lengths from 500mm to 2000mm in 100mm increments to suit various construction requirements.

Summary

The Simpson Strong Tie Twist Strap 1200 x 30 x 2.5mm is a durable, compliant, and versatile restraint strap designed for light structural restraint in timber framing applications. Its innovative rolled form, adherence to building standards, and ease of installation make it an essential product for ensuring strong, reliable connections between timber floor and roof systems and masonry walls. Available in a range of sizes, this product is well-suited to both residential and commercial construction projects requiring quality and safety.