For mumble mumble years now I've set out studs and rafters at 16 inch centres or 400mm in new fancy money.
I've always simply used, for want of a better term, my 16 times table. Today however, it was pointed out that all that mental arithmatic was unneeded as tape measures are marked to allow setting out.
Of course we all got our tapes out and lo and behold a little diamond at 16" 32" 48" and so on. Some even had the same marks at 400mm increments.
Now one of the lads tapes also had these little diamond at 19 3/16 " increments and when I checked a tape at home it also had these marks but try as we might we can't work out why, it's not a size of anything I've come across certainly not a stock size of boards and not for brickwork either.
Does anybody here know or have a decent idea as to what the marks refer to?
I've always simply used, for want of a better term, my 16 times table. Today however, it was pointed out that all that mental arithmatic was unneeded as tape measures are marked to allow setting out.
Of course we all got our tapes out and lo and behold a little diamond at 16" 32" 48" and so on. Some even had the same marks at 400mm increments.
Now one of the lads tapes also had these little diamond at 19 3/16 " increments and when I checked a tape at home it also had these marks but try as we might we can't work out why, it's not a size of anything I've come across certainly not a stock size of boards and not for brickwork either.
Does anybody here know or have a decent idea as to what the marks refer to?
