The Bow Flex system of wall restraint is available in 8mm material. Installation is performed from outside the building through a 12mm hole in the building fabric. It must be emphasised that a check must be made for any services that may run through the floor/ceiling cavity. It is quite common for wiring to be present and is certainly not unknown to have water pipes for the heating system or even a mains water pipe in this location. It is recommended that checks are made in this area with the use of a boroscope.
The connection to the wall is either made into the second floor joist, if they run parallel with the wall, or into the ends of the floor joists if they run into the wall. A proof test of the connection into the timber can be made immediately after installation using a Target Load Test Unit.