Simpson Strong-Tie Light Engineered Restraint Strap

Lightweight Restraint Strap with High Strength for Vertical Applications

The Simpson Strong-Tie LES (Light Engineered Strap) is a next-generation alternative to traditional heavy restraint straps. Designed for vertical load applications, such as securing wall plates to masonry, the LES combines high performance with ease of installation, lighter weight, and code compliance.

By reducing strap thickness without compromising structural integrity, the LES strap can span floor joists and truss bottom chords without the need for notching—speeding up installation and preserving timber strength.

Key Features

• Engineered Lightweight Design
  Up to 60% lighter than traditional restraint straps, offering easier handling and faster installation on site.

• Direct Replacement
  Replaces both light and heavy traditional restraint straps in roof and floor construction.

• Improved Workability
  Can be installed over joists and trusses—no need to notch or cut timber.

• Formed Edge Construction
  Adds strength and stiffness at bends for robust load resistance.

• Easier to Course with Blockwork
  Reduced strap thickness allows better alignment within standard masonry block courses.

Material

• Pre-Galvanised Mild Steel
  Delivers durable corrosion resistance suitable for internal construction and sheltered environments.

Compliance

• Fully compliant with BS EN 845-1, meeting UK structural building regulations.

Product Variants

Reference	Installation Type	Dimensions (mm)	Hole Sizes (Ø mm)	Holes per Flange (B1/B2)	Weight (kg)
LES06B10	Vertical	35 × 500 × 100 × 1.2	Ø4.1 / Ø6.1	8 / 8	0.18
LES08B10	Vertical	35 × 700 × 100 × 1.2	Ø4.1 / Ø6.1	12 / 12	0.24
LES10B10	Vertical	35 × 900 × 100 × 1.2	Ø4.1 / Ø6.1	16 / 16	0.30
LES12B10	Vertical	35 × 1100 × 100 × 1.2	Ø4.1 / Ø6.1	20 / 20	0.36

Product Details

Images

Applications

• Wall Plate Hold-Downs

• Vertical Restraint in Roof and Floor Systems

• Residential and Commercial Masonry Construction

Benefits

• Faster Installation
  Designed for speed—no timber notching, simpler positioning, and lighter lifting.

• Less Structural Interference
  Fits over joists and chords without compromising strength or requiring modifications.

• Cost-Efficient Handling
  Lightweight nature reduces transport, handling fatigue, and storage issues on-site.