 |  Corrugated fasteners/dogs. These are added only to give extra rigidity but are not normally required in standard openings. |
 Position these in from edges. There will be no twisting or warping to worry about. Suggest at least 25mm/30mm from edges. See below regarding angle of pilot holes |  |
 |  Fixing at centre of Head to ensure no bowing will impede door clearance.
 Drill pilot holes at a slight angle to avoid the possibility of splitting the legs. Only use parallel shank screws. Screws such as SPAX-S which are self drilling can be used, although a pilot hole through the head will ease the final tightening. |
 Normal screws & plugs or nails to fix to walls/blocks. It is best to pre-drill pilot holes first. Pack and fix as standard practice. | |
