Simpson Strong Tie Light Engineered Strap Bent

The Simpson Strong Tie Light Engineered Strap Bent is a versatile, high-performance restraint solution specifically designed to replace traditional light-duty bent straps in vertical load applications. Engineered for use in modern construction and compliant with industry standards, these bent straps are ideal for securing wall plates and providing vertical restraint in timber-framed structures connected to masonry walls.

Available in both 600mm and 1000mm lengths, they are particularly well-suited for holding down wall plates, meeting Building Regulations for light restraint, and ensuring structural integrity where vertical movement or uplift resistance is critical.

Variants & Specifications

Material: Galvanised steel
Finish: Pre-galvanised for corrosion resistance
Standard Compliance (1000mm): BS EN 845-1
Design: Formed edge for added rigidity and improved performance under load

Key Features

• Engineered for Modern Building Standards
  These straps are specifically designed to serve as a lightweight yet strong replacement for traditional bent straps. They provide reliable vertical restraint in timber constructions such as wall plates or floor joists seated on masonry.
• Formed Edge for Added Strength (1000mm)
  The 1000mm version includes a formed edge design, which reinforces the strap along its bend. This feature enhances the strap’s rigidity and durability under load-bearing or uplift conditions.
• Compliant and CE Marked
  The 1000mm strap complies with BS EN 845-1, ensuring it meets UK and European standards for restraint straps in masonry and timber construction. It is also CE marked, verifying its structural performance.
• Corrosion Resistant
  Both variants are manufactured from 1.5mm pre-galvanised steel, offering protection against rust and ensuring long-term performance even in humid environments, such as roof or wall voids.
• Ease of Installation
  Pre-punched holes allow for quick and secure fastening to timber or masonry using screws, nails, or bolts—ideal for both new build and retrofit situations.

Applications

• Securing wall plates to masonry in roof structures
• Providing vertical restraint to timber floor joists and rafters
• Hold-down strapping for roof trusses or gable walls
• Use in loft conversions, house extensions, or general timber-masonry connections

Installation Guidance

• Placement:
  • Bend portion should sit flush against the timber element (e.g., wall plate).
  • Long leg fixed to masonry using appropriate plugs and fixings.
• Fixings:
  • Use hardened nails or wood screws into timber (e.g., 8SWG x 75mm).
  • Use wall plugs and screws or mechanical anchors when fixing to masonry.
• Spacing & Positioning:
  • Straps should be fixed within 150mm of the end of a wall plate.
  • Typically installed at 2m centres or as specified in design.

Benefits

• Reliable and lightweight solution for vertical restraint needs
• Improved performance compared to traditional flat or bent straps
• Easy to install with standard tools and fasteners
• Available in multiple lengths for flexibility in use
• Compliant with building codes and standards (1000mm model)

Typical Use Case Scenarios

• Roof Plate Restraint: Holding down wall plates on top of blockwork in pitched roof systems.
• Loft Extensions: Where rafters or joists need additional vertical hold-down.
• General Construction: Any timber-to-masonry connection requiring light vertical restraint.

Frequently Asked Questions (FAQ)

Q: Can these straps be used horizontally?
A: These straps are primarily designed for vertical applications. For horizontal restraint (e.g., tying joists into masonry), use flat light restraint straps instead.

Q: Are these suitable for external use?
A: They are galvanised for corrosion resistance, making them suitable for protected outdoor environments. For exposed external applications, stainless steel straps may be more appropriate.

Q: How many straps do I need for a roof plate?
A: UK Building Regulations typically require straps at 2m intervals. However, always consult your structural engineer or building control for site-specific requirements.

Summary

The Simpson Strong Tie Light Engineered Strap Bent offers a modern, efficient, and regulation-compliant method of providing vertical restraint in timber-to-masonry connections. Whether you are working on new constructions or retrofitting timber elements to blockwork, these straps provide an ideal combination of strength, durability, and ease of use. With enhanced features such as formed edges and CE marking, they are a reliable component for structural integrity in residential and commercial projects alike.