"Rodger" wrote in message news:xYM%i.813$HH2.70@edtnps82...
The mantra, "Always install the wallboards perpendicular to (across) the
joists on ceilings." is repeated everywhere, but I have strapping running
perpendicular to the joists on my basement ceiling. Do I install drywall
along the strapping (perpendicular to the joists) or perpendicular to the
strapping and, thus, along the joists?

- Rodger

Forget the joists in this case, use the strapping orientation the same way.