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Simpsons Heavy Engineered Restraint Strap | 800mm
Simpsons Heavy Engineered Restraint Strap | 800mm
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Description
Description
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 to 1.5mm allows the HES strap to span the bottom chords of trusses and over floor joists without the need for notching.
HES 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.
- Length : 800mm
- 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
Material
Pre-galvanised mild steel
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
Product Details
Product Details
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Frequently Asked Questions
What is a heavy engineered restraint strap?
A metal tie used to anchor and brace structural elements like walls and roofs.
Why choose 800mm length?
It provides adequate coverage for standard connections without extra joints.
What material and finish is used?
Galvanised steel to resist corrosion and ensure long-lasting durability.
How is it fixed in place?
Fixed with nails or bolts through pre-drilled holes into masonry or timber.
What loads can it resist?
It resists uplift, wind, and lateral loads; check manufacturer’s data for limits.
Can it be used in retrofit work?
Yes, ideal for reinforcing existing structures to meet code requirements.
Can it bend during installation?
Gentle bending is acceptable, but avoid sharp folds that weaken the metal.
How to maintain it over time?
Inspect periodically for corrosion or loosened fasteners and replace if needed.
Can straps overlap?
Yes, but maintain adequate overlap per the structural guidance.
Is it suitable for treated timber?
Yes, the galvanised finish prevents chemical corrosion from treated wood.