How wide of a rip of drywall 5/8 can I put on a wall with out a stud behind it
I would frame all my studs at a minimum of 18" on center for new walls and hanging drywall.
16 is typical 24 is allowed in some cases.
24" (610 mm) is the maximum stud spacing for 5/8" single-layer gypsum board per Gypsum Association specifications. Boards may be parallel or perpendicular to studs.
24"on center is generally the max spacing of studs
