Heavy duty straps are generally used for lateral loads, such as securing masonry walls to roof trusses and joists. Light duty straps are employed for vertical loads, like holding down timber wall plates to masonry walls. Both types provide essential structural support but handle different types of tension.
Heavy Duty & Light Duty Galvanised Restraint Straps
Wall plate straps, commonly referred to as restraint straps or bat straps, are essential metal connectors used to secure timber roof and floor structures to masonry walls. This category features a selection of light duty and heavy duty restraint straps designed to resist high-tension forces and prevent structural movement. These galvanised steel brackets provide long-lasting durability and corrosion resistance across various structural applications, ensuring buildings remain secure against shifting over time.
These straps are predominantly used to prevent lateral or vertical movement caused by wind pressure and other external forces. Heavy duty restraint straps are typically applied for horizontal lateral restraint, securing roof trusses and joist & studding timber directly to blockwork. In contrast, light duty restraint straps and fixing bands are generally used to manage vertical loads, such as holding down timber wall plates securely to the top of concrete brick & block masonry. Bent and twisted variations allow for flexible installation, depending on whether the strap needs to sit flat against a wall or wrap over the top of a structural beam.
Using the correct restraint straps ensures compliance with current building safety standards by effectively distributing loads and mitigating the risk of cracking or bowing in walls. These galvanised metal strips feature pre-punched multi-hole designs, allowing for straightforward installation without the need for complex tools. They are compatible with standard structural fasteners, meaning heavy-duty screws or square twist nails will ensure a firm and reliable connection into both timber and masonry surfaces. Whether reinforcing a simple timber frame or supporting large-scale roofing alongside solid joist hangers & struts, these versatile ties provide dependable structural integrity.
Wall Plate Straps FAQ's
When fitting horizontal restraint straps to a flat wall, they should typically not exceed 2m intervals. They are usually attached to at least three timber members using noggings and packing to ensure the load is properly distributed across the structure.
A typical 1m restraint strap requires no less than five fixings, which roughly works out to one fixing per block. It is essential to use all specified pre-punched holes to guarantee a secure and compliant hold against the masonry.
Installation requires the most suitable fixings for the base material, such as square twist nails or specific structural screws. Standard drywall or general-purpose screws may not offer the necessary shear strength to safely anchor the strap under high-tension loads.
Twisted straps are designed to accommodate specific building angles, allowing the metal strap to run along the side of a timber truss and then twist to lie flat across the top of a masonry wall. This eliminates the need to bend standard straps on-site and provides a much stronger structural tie.