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On a building project there are dimension and elevations given in inches and tenths. Its easy if I have a pocket of change but if we go crypto Im done.
 
I have surveyed for 20 some years, roads, streets, buried utilities and land are measured and staked-out in feet and tenths of a foot. Bridges
and buildings are measured and set-out in feet and inches. Try telling a carpenter that the wall has to be 10.279 ft. long and 8.342 ft high, or a pipe fitter the pipe has to be 7.12 ft long. Thats as much fun as trying to explain to a dirt Forman that a street is 4.26 meters wide with a 600 centimeter curb on the right side, when all he has is ft/tenths tape measure !!? Dan
 
By the way a carpenters rafter square gives common rafter lengths in decimals.


Ridge height and common rafter layout. On the first line of the rafter table (length of common rafters per foot run), the base of the triangle for all the entries is 12. The altitude is the number above the table. Its cleverly hidden in the 24-inch scale along the edge of the square. The hypotenuse of the triangle is provided in the decimalized number just under the number indicating the altitude.

For a 6-in-12 pitch roof, then, assume a base of 12 and look under the number 6 to find the hypotenuse, or 13.42 (see annotated framing square, below). The task now is to expand this little, 6-12-13.42 triangle into a much larger triangle that preserves the angles of the little triangle and fits the roof you are building.

Click to enlarge
 
And if you have been surveying for 20 years aren't you technically measuring in wavelengths? Just to make things even worse. No more pulling steel tapes with a scale and compensating for temperature.
 
Gotta love the construction master calculator. Instant conversions on everything. Metric to Feet and Inches. Decimals to Fractions. On and on.
 
My favorite stake which I saved.
cvphoto168578.jpg

The story is that the city was installing a new sanitary replacement line days before we started the site utilities. Dean is very god at his job and diligent in leaving a detailed comp sheet with adequate explanation. In this case he had no good way of knowing so passed it on. All worked well.
 
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