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What's with the tenth of a foot...?

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My dad was a civil engineer and registered land surveyor, and we used to run the rod for him when growing up. I remember once being sent several miles away in search of a corner that hadn't been identified in years. He set up on the nearest known point with a theodolite and distance meter (new tech at the time) and kept me moving over the radio until the distance and angle were right. I was on an old pile of rocks...an encouraging sign. We marked the spot and began carefully digging through the rock pile til we found the one marked with the appropriate markings, about a foot from my rod.

He showed me the notes from the original surveyors from the late 1800s. They used rods (16.5 feet, 25 links) and chains (66 feet, 100 links) [5,280 feet in a mile is 320 rods or 80 chains], adjusted for the impact of temperature on its length, and stepped down steep sidehills in increments that allowed the chain to remain level to ensure they were only measuring horizontal distance. As with appraisers and modern surveyors, some cared and were extremely accurate and some were just collecting a paycheck. All such records are signed, so those that follow learn who to avoid,or at least charge more to follow. It seems it is easier these days!
I've always been curious about how they survey in hilly country. I assumed they measured on the surface of the land no matter how steep it was. Now I know.
 
I agree with the post about not understanding the upset when ANSI states "the the nearest inch OR... because can still use that unit of measurement. What is not clear to me is whether or not it will be seen as faulty if we have measurements to the foot; example if a length is 10 feet are we not to enter exactly 10 feet?
 
It won’t be considered faulty. If you’re worried about it include a comment that says “appraiser measured to the nearest tenth of a foot” or simply report as 10.0 on your sketch.
 
1' sometimes 0.5'. The GLA is what matters in the real world. And if you measure a home to 2,750 or 2,810 sf, it doesn't matter. The market reacts the same to both. And it won't make a difference if you measure to the nearest foot or pretend to measure to the nearest millimeter. I'm lucky to get to the nearest foot in many instances.
While I agree that precision close to an inch is probably overkill, I think most of us can do better than the nearest foot on straight line measurements. I think we should measure as close as we can, and understand that there may be some very minor discrepancies in GLA, no matter how careful we are.

I would assert that on most of the houses I measure, I could go back the next week, and most of my measurements would be within a couple inches of my prior measurement. I have measured known distances with my Disto and gotten within 1 inch on most of them.

YMMV.
 
Does anyone describe any measurement in life to a tenth of a foot, rather than inches (I'm sure this is a dumb question, perhaps architects?). For something that is supposed to enhance conformity/accuracy, why is there a choice given in ANSI (1 foot 7 inches is 1.6 feet looking at my tenths side of my tape)? Im sure there is a good reason, but I am just curious...Thanks, Bob
LOL. LOL. At this moment I now understand why the tape has numbers on both sides. Dhhhhhhh.
 
Does anyone describe any measurement in life to a tenth of a foot, rather than inches (I'm sure this is a dumb question, perhaps architects?). For something that is supposed to enhance conformity/accuracy, why is there a choice given in ANSI (1 foot 7 inches is 1.6 feet looking at my tenths side of my tape)? Im sure there is a good reason, but I am just curious...Thanks, Bob
Yea, but the AF reminds us that inches are more precise than 10th's...
 
So what. Would only be an issue if you are using hand drawn sketch in your reports

If you measure in inches and enter the numbers into a sketch program calculators do not work with inches unless you convert them to inches.
 
25.5 (tenths) x 50.5 =1,237.25 s/f using inches in a calculator 25.6 x 50.6 = 1,295.36. That is about 58 s/f difference
 
While I agree that precision close to an inch is probably overkill, I think most of us can do better than the nearest foot on straight line measurements. I think we should measure as close as we can, and understand that there may be some very minor discrepancies in GLA, no matter how careful we are.

I would assert that on most of the houses I measure, I could go back the next week, and most of my measurements would be within a couple inches of my prior measurement. I have measured known distances with my Disto and gotten within 1 inch on most of them.

YMMV.
The AF rarely if ever seems to mention why a wall is say, 24.5 in rather than 24.0 or 25.0. I often measure SFR's with most/all dimensions to the foot, or most/all to the 1/2-foot, and wonder why that is. Comments anybody?
 
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