3 ms·
I knew about the survey foot because both the l00' tape measures I have are in survey feet. Messed me up on a home construction project about 13 years back. It
by jackfoxy 7y ago
I knew about the survey foot because both the l00' tape measures I have are in survey feet. Messed me up on a home construction project about 13 years back. It was then I learned there are 2 differing feet definitions.
- function_seven 7y agoAre you sure it was the differing length of each version (about 610 nanometers), or was it because your tapes were marked in tenths of a foot instead of inches?
- jessaustin 7y agoI have actually worked with people who didn't notice this about their 100' tapes. Even better are the tapes divided by 12 on one side and 10 on the other...
- jackfoxy 7y agoWell this was a false memory I may now remember as false. No, it wasn't tenths. I think more likely it had to do with the claw at the start of the tape for attaching to your starting point, which does not stay at a rigid 90 degrees. My memory is that over several tens of feet I was off by 1/8 inch.
- dan-robertson 7y agoOver the length of a 100’ tape, the difference is about 61 um, ie 0.061 mm. How could that difference have any effect?