"YesMaam27577" wrote om...
In general, the red diamonds are 16" apart, allowing 4 studs (and
three spaces) to support a 4' sheet of ply or drywall.

And the black ones are about 19.2", allowing six studs (five spaces)
to support an 8' sheet. (This is primarily used in commercial work,
where steel studs are used to hold long sheets -- 12' and longer -- of
drywall.)

It's also the spacing on the pre-fab wood trusses holding up
the roof of my addition, because the engineer at the truss plant
said we needed that _or_ 2x6 top chords to make the trusses
stiff enough that the ceiling drywall wouldn't crack, so I said
"Do both."

"Over-built" (like "over-kill") is an oxymoron. :-)
--
Dennis M. O'Connor