I got a new, left-handed tape measure for my birthday. It's got the
usual markings highlighting that 97" is 8'1", that studs are centered
on 16" multiples, etc. But at multiples of approximately 19 3/16"
there's a diamond. I've been wracking my brain trying to figure out
what that is and I haven't come up with it. Does someone here know?
"Many tape measures also have a small black diamond every 19.2". The diamond
is an alternative OC spacing for framing materials. The diamond OC spacing
matches 16" OC spacing every 8' so it is compatible with most sheet goods
(plywood, paneling, etc.). The benefit of using the diamond spacing is that
you save one joist or stud every 8'. Always check with your local building
authority before using an alternate spacing."
"Christopher Nelson" < email@example.com
Not very helpful. It comes to 5 per sheet if you count the two end
ones, 4 if you count just one end. Since most trusses use 24" spacing
(5 or 4 depending on how you count) I can't see what purpose 19.2
Same as on other sheet goods. 4' x 8' will only work on the first or
last stud for a join. and won't work at all for 10' or 12' or 14' long
goods (sheetrock). Also won't work at all for any 4' wide goods layed
I think Robin Willians mentioned this on his show, Mork calling Orson! Come
in, Orson! That marking helps repair his space craft.
Probably an Egyptian measure, a cubit of furlong, or catslength, or
Christopher A. Young
"Christopher Nelson" < firstname.lastname@example.org> wrote in message
But what for? The only module that works for 19.2 is at the 8' mark.
Nothing shorter or longer in standard inch measure makes a join at any
of the other stud 19.2 placements. Totally useless in my opinion.
Just like some people have been saying, 19.2 is an alternate layout.
I've only used it on floor trusses. Yes, you have to cut 38.4" off of
some sheets to achieve a staggered pattern, but you always have to cut
sheets to stagger them, unless you have some 4x4 sheets. The fact that
you don't have a joist at 12' doesn't really affect the rockers.
Layout is pulled from the outside of the wall for the floor plywood,
but would have to be pulled from the inside of the wall for sheetrock,
so there isn't a joist at 12' anyway. On very large rooms there might
be a few more cuts, but sheetrock is cheap and easy to cut.
Sounds like it would handy for framing or squaring up roofs, if you live
in an area where local code or anticipated snow load requires closer
than 24 oc trusses or rafters. Be a damn PITA to have to clip every
sheet of deck board to land on a rafter.
The 193/16" mark is for engineered lumber, such as glue-lams, versa-lam
etc., for flooring joists and trusses. Engineers design these trusses and
joists to be stronger than traditional milled lumber, therefore requiring
fewer to support an 8' span. The fact that sub-flooring and roof decking
comes in 8' spans should explain the diamonds @ 19.2" intervals. More
cost for engineered lumber vs traditional lumber, but fewer members to
install, and little to no risk of warping, or cracking from stress.
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