(B) Supports. Horizontal runs of EMT supported by openings through framing members at intervals not greater than 3 m (10 ft) and securely fastened within 900 mm (3 ft) of termination points shall be permitted.
if you are concerned about the conduit rattling around loose without being strapped, B-line makes a spring metal clamp to strap horizontal pipe in steel studs- BG-x-H7 or BP-x-H7 on page 27 of their catalog