Simpson Strong Tie Flat Strap 1200 x 30 x 5mm Heavy Restraint Strap H and L straps are designed to the Building Regulations , BS 5268 Part 3 and other building standards for vertical and horizontal restraint when connecting timber floor and roof systems to masonry walls.) View Heavy Restraint Strap Technical Information * HRS and LRS new rolled form gives strong performance, yet light to use. The HRS is accepted by NHBC as an alternative to the 30mm x 5mm restraint strapping. The LRS is an alternative to the 30mm x 2.5mm restraint strap. * HTFA and LTFA are designed to bridge the 50mm cavity and tie the timber frame to brickwork. Extends 75mm into brickwork and 300mm through cavity. * Heavy restraint straps meet requirements for lateral restraint of roof trusses, rafters and joists tied into masonry walls. * Light restraint straps are designed for vertical loads such as wall plates on top of masonry walls. * All common sizes in stock from 500 to 2000mm long, 100mm increments. MATERIAL: