LES

Light Engineered Restraint Strap

 

A direct replacement for traditional restraint straps, the innovative design of these lightweight straps allows ease of handling and installation whilst maintaining the structural strength and robustness of much heavier weight types.
The HES (heavy engineered strap) & LES (light engineered strap) replace
traditional heavy and light restraint straps in roof and floor construction.
Reducing the thickness allows the LES strap to span the bottom
chords of trusses and over floor joists without the need for notching.
LES straps are less than 40% of the weight, quicker to fit, and overcome many fixing problems associated with traditional heavy straps.
The LES is designed for vertical applications e.g. holding down wall plates.

 

  • Formed edge design gives additional strength on bend
  • Quicker to install - can fit over top of floor joists and truss bottom chords
  • Easier to course with blockwork
  • No need to notch joists
  • Complies with BS EN 845-1
CE Marking

Product Details

Images

Features

Material

  • Pre-galvanised mild steel

Technical Data

Dimensions

LES Product Dimensions

References Installation Type Dimensions [mm] Holes
A B1 B2 t Flange B2 Flange B1
Ø4.1 Ø4.1 Ø6.1
LES06B10Vertical355001001.2388
LES08B10Vertical357001001.231212
LES10B10Vertical359001001.231616
LES12B10Vertical3511001001.232020

LES Performance Values

References Fasteners Characteristic Load [kN]
Masonry Wall Floor Joist or Rafter Wall Plate
LES5 - 5.5x50mm Wood Screws-3 - N3.75x304

Installation

Installation

Installation

Horizontal strap installation

  • Approved Document A of the Building Regulations requires lateral restraint to be provided at each floor at a maximum of 2 metre centres
  • Restraint straps “perpendicular” to the floor joists are required to be held tight against the masonry and fixed across the first 3 joists
  • Restraint straps “parallel” to the floor joists are required to be held tight to the masonry and be at least 1200mm long
  • The characteristic tensile strength for horizontal restraint straps should not be less than 8kN

Vertical strap installation 

  • Vertical strapping, at least 1 metre in length, should be provided at eaves level to hold down timber wall plates, at intervals not exceeding 2 metres

Certification

Declaration of Performance (DoP)

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Contact

Simpson Strong-Tie U.K.

Simpson Strong-Tie

Cardinal Point, Winchester Road
Tamworth
Staffordshire
B78 3HG
United Kingdom