There are various methods of fixing to concrete or steel frames.
Plug & Screw Fixings
The SX8 and SX8L plugs are manufactured from high quality nylon and are resistant to weathering, ageing and rotting. They require an 8mm diameter hole and are suitable for use in various types of block as well as concrete. The fixing into the SX and SXL plugs is a stainless steel No 12 woodscrew.