Simpson Strong Tie Light Strap Flat 600 x 30 x 2.5mm

The Simpson Strong Tie Light Strap Flat 600 x 30 x 2.5mm is a light-duty horizontal restraint strap, engineered for securing timber floor and roof systems to masonry walls. Manufactured from galvanised edge-coated steel, this robust and versatile strap offers a dependable solution for lateral restraint applications in residential and light commercial construction.

This flat strap is specifically designed to deliver lateral support where horizontal restraint is needed, such as tying joists or rafters to structural masonry, and meets common building standards and installation best practices.

Technical Specifications

• Length: 600mm
• Width: 30mm
• Thickness: 2.5mm
• Weight (Boxed): 325g
• Material: Galvanised edge-coated steel
• Strap Type: Light duty, flat design
• Finish: Corrosion-resistant galvanisation for long-lasting durability

Key Features

• High-Quality Galvanised Steel:
  Crafted from galvanised edge-coated steel, this strap provides excellent corrosion resistance and ensures durability in damp or humid environments.
• Ideal for Horizontal Restraint:
  Designed to offer lateral restraint by connecting timber floor and roof systems to masonry walls, helping to prevent structural movement caused by wind uplift or shifting loads.
• Flat Design for Ease of Installation:
  The flat configuration allows for straightforward alignment with timber members, making it quick and easy to install in a range of applications.
• Lightweight Yet Reliable:
  Despite its light-duty classification, the strap delivers sufficient strength for use in standard lateral restraint applications, especially in domestic settings.
• Standards Compliant:
  Suitable for use in construction scenarios that comply with UK building regulations, including BS 5268 Part 3, NHBC standards, and other relevant structural guidelines.

Applications

• Providing lateral restraint for floor and roof systems
• Connecting timber joists, rafters, or wall plates to masonry walls
• Enhancing structural stability in timber-framed or hybrid construction
• Used in new builds, renovations, and timber retrofitting projects

Installation Guidelines

• Strap Placement:
  Flat restraint straps should be positioned horizontally along the timber joists or rafters, lying flush against the structure for optimal support.
• Fixings into Timber:
  Use four 4mm x 75mm round nails or equivalent structural screws to secure the strap to timber members. Straps should span at least three joists, incorporating noggings where required.
• Masonry Fixings:
  When fixing to masonry, use hardened nails (8SWG x 75mm) or No. 12 x 50mm screws in plastic plugs to ensure a secure hold.

Spacing:
Horizontal lateral restraint straps should be spaced no more than 2 metres apart, per current building regulation guidance.

• Bend Detail (if used):
  If a bend is incorporated into the strap for specific installation needs, ensure that the bend is a minimum of 100mm and is located in the centre of a solid masonry unit.

Benefits

• Provides essential lateral restraint for timber-to-masonry connections
• Corrosion-resistant for long-term use in various environments
• Quick and easy to install with standard tools and fixings
• Supplied in a convenient 600mm length for compact or confined spaces
• Compatible with both new builds and retrofitted structural work

Frequently Asked Questions (FAQ)

Q: What is the difference between flat and twisted restraint straps?
A: Flat straps like this one are designed for horizontal applications, such as lateral restraint of joists or rafters to masonry walls. Twisted straps are better suited for vertical applications or when offset fixing is required.

Q: Is this strap suitable for external use?
A: The strap is made from galvanised steel, which offers a degree of corrosion resistance. However, for fully exposed or external applications, stainless steel alternatives may be more appropriate depending on environmental conditions.

Q: Does this strap meet UK building regulations?
A: Yes. This strap is compliant with UK construction standards, including BS 5268 Part 3, and is acceptable for use under NHBC building guidelines.

Q: Can I use this for vertical restraint?
A: While possible, flat straps are typically used for horizontal lateral restraint. For vertical load-bearing applications, a twisted strap or heavy-duty vertical restraint strap is recommended.

Q: How often should these straps be installed along a wall?
A: Straps should be installed at intervals not exceeding 2 metres, ensuring they connect to at least three timber members using appropriate fixings.

Summary

The Simpson Strong Tie Light Strap Flat 600 x 30 x 2.5mm is a dependable, easy-to-install solution for horizontal structural reinforcement in timber and masonry construction. It’s the ideal choice for tradespeople, builders, and contractors seeking a lightweight yet effective method for tying timber floor or roof structures to masonry walls.

Whether for new builds, renovations, or retrofitting applications, this flat strap delivers the strength, flexibility, and compliance needed for modern structural requirements.