Before any wall saw touches a load-bearing wall, the load path needs to be understood — what's carrying weight above the opening, and how that load will be supported once material is removed. This usually means a structural engineer's input before the cutting plan is finalised.
A concrete scan is the next step, confirming exactly where rebar and any embedded services run so the cutting line avoids anything critical.
Only once the structural and scanning steps are settled does the actual cutting begin — track-mounted, straight, and to the exact dimensions specified. Skipping the planning stage is the most common cause of delays and rework on this type of job.