Simpson Strong-Tie Heavy/Light Restraint Straps

Structural Restraint for Roofs, Joists, and Wall Plates

The Simpson Strong-Tie Heavy (H) and Light (L) Restraint Straps are designed to comply with UK Building Regulations for both horizontal and vertical restraint in masonry construction. Whether used for restraining structural roof elements or securing wall plates, these straps provide reliable and compliant reinforcement across a wide range of building applications.

Key Features

• Heavy Restraint Straps (H Straps)
  Engineered for lateral restraint of structural elements such as:

  • Roof trusses

  • Rafters

  • Floor joists
    Typically tied into masonry walls for anchoring under wind or lateral load conditions.

• Light Restraint Straps (L Straps)
  Designed for vertical restraint applications including:

  • Securing wall plates on top of masonry walls

  • Supporting vertical loading scenarios

• Multiple Form Variants Available
  Supplied in several configurations to suit specific installation needs:

  • Flat strap

  • Strap with a bend

  • Double-bend strap

  • Strap with a twist

  • Strap with a bend and twist

Material Options

Product Details

Images

Flat Strap

Strap with a Bend

Strap with a double bend.

Strap with a twist

Strap with a bend and a twist

Applications

• Roof Structures
  Restraint of rafters and trusses to masonry

• Floors
  Anchoring joists in cavity wall construction

• Wall Plate Restraint
  Prevention of uplift and vertical displacement

• Suitable for residential, commercial, and institutional masonry-based construction

Benefits

• Regulation-Compliant
  Meets the horizontal and vertical restraint standards required by UK Building Regulations.

• Versatile Configurations
  Multiple strap shapes accommodate various site-specific detailing and construction tolerances.

• Corrosion-Resistant Options
  Choose stainless steel for external or marine environments.

Important Note

• Standard straps are pre-galvanised; for stainless steel versions or custom lengths, please contact Simpson Strong-Tie Technical Support to place a special order.

• Ensure correct strap type and size is selected based on structural load and restraint direction.