It is possible to mount the ATX-FBR-500 Folding Squat Rack without the Stringer. If you have a brick or cement wall and the connection points line up to the surface, you are sweet. However your preferred spot may mean one of the connection points line right up to mortar. By using the stringer, you have more flexibility.

Regardless of whether you are using the Folding Squat Rack Stringer or not, please seek professional help if you are inexperienced in mounting heavy objects to a wall. Particularly a gyprock wall. If you do not know what you are doing you could damage your rack, wall or most importantly yourself. So take care!