I had to bring my paperwork to the office this morning. As I drove, I thought of the numbers that roll around in my head. They're there for immediate reference and I doubt I'll forget any in the future, unless I become severely demented.
110 - The pounds of one inch of asphalt base per square yard of coverage
9 - Square feet in one square yard.
2000 - Pounds in one ton.
27- Cubic feet in a cubic yard
150 - Pounds per square foot of each foot of concrete in a form. If you run the numbers, tall pours require substantial bracing at the bottom of a form. Wall ties I approximate at 2000 pounds of tensile strength each.
1/8 - The rise in bar diameter in inches for each designation. For example No. 3 bar is 3/8 inches. No 4 is 1/2 inches, No. 5 is 5/8....etc.
3.142 - An acceptable approximation of pi for calculations involving circles.
.7854 - pi divided by four. I use it to multiply with the diameter squared of a circle to determine the area. (I find it easier to to use.)
.2156 - The area of a fillet. I use it to determine the square footage of a fillet in the turnout radius of a drive.
3.28084 - feet in one meter
25.4 - millimeters in one inch
39.375 - inches in one meter
7.62 - meters in one standard section of guardrail, which slightly longer than 25 feet to allow for lapping.
6.25 - distance between the centers of standard guardrail posts.
21 - inches above the ground for the center line of a guardrail bolt.
3,4,5 - Proportion of a right triangle. When all you have are two measuring tapes, some string and some stakes, any multiple of the three dimensions can be used as a poor boy way of squaring anything.
490 - weight of a square foot of steel. I've used this to determine the unknown weight of structures for demolition. Measure the members, figure the total cubic feet and you arrive at a usable approximation of weight.
231 - cubic inches in a gallon. This required when figuring the amount of sealant for sealing paving cracks, or caulking.
The list goes on. I use the decimal value of inches constantly, since surveying requires conversion of inches to feet.
In school, I was deplorable in math. I'm guessing my mind doesn't work well with abstract numbers, but can make do with practical applications.
In Case You've Wondered
My blog is where my wandering thoughts are interspersed with stuff I made up. So, if while reading you find yourself confused about the context, don't feel alone. I get confused, too.
If you're here for the stories, I started another blog: scratchingforchange.blogspot.com
One other thing: sometimes I write words you refuse to use in front of children, or polite company, unless you have a flat tire, or hit your thumb with a hammer.
I don't use them to offend; I use them to embellish.