Sam Ewalt wrote:
. > Perhaps there is no "standard" maybe I should say what is the most
. > common size of a sheet of plywood? In the United States it's
. > 4 feet x 8 feet.
1200mm X 2400mm
Now, let's talk about the size of a 2 X 4. It's neither 2-inches nor
4-inches. When it is sized, it may be 1-1/2 inches X 3-1/2 inches if the
moisture content is classified as "dry", or 1-9/16 inches X 3-9/16 inches if
the moisture content is classified as "wet".
Pipe sizes are something else entirely. Neither the inside diameter nor the
outside diameter of a pipe is its nominal size.
I, for one, look forward to the SI. Numbers will be added decimally just
like we add money. Gone will be doing arithmetic to base 12 (12 inches = 1
foot), base 3, base 5280, etc.
Those who would like to retain the American/South Africa measuring system;
would you like our monetary system to be the same as the English money
system used to be?
Roger Turk
Tucson, Arizona USA
