This is interesting. Someday the foot will go the way of the hand, or chain
most recently. I live near Canada which adopted SI units. All provinces
support SI and all but one, Quebec, have two sets of drawings for building
construction. One set in metric for the permit and the other in US customary
(formerly english), for the builder.
Personally, I've designed buildings using architectural fractions (ugh!),
design sites in tenths/hundreths of a foot (better!) and invariably get site
plans from architects in feet-inches-fractions that they had to convert from
surveyor foot-decimals. I love CADD. The dimesnsion [0.009"] is actually
9-thousandths in english lingo. It's tenths, hundredths, thousandths,
10-thousands.....
In modeling, old-timers still use ounces here in the US and I can see their
brains converting from grams. I picked grams when I started to reduce the
number of digits. A millimeter only saves one or two digits after the
decimal point. But, it's all a matter of familiarity. My thumb is a fat 1",
four fingers are 3", and my shoe is actually a foot long.
We're getting there.... How big is a g/cm^3? I like [#] over CF, over
lb/ft^3. ;>
Bruce
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From: Indoor_Construction_at_yahoogroups.com
[mailto:Indoor_Construction_at_yahoogroups.com] On Behalf Of izgo
Sent: Sunday, April 09, 2006 5:05 PM
To: Indoor_Construction_at_yahoogroups.com
Subject: [Indoor_Construction] Re: Units of measurement?
Hi Jim.
I live in Argentina.
Just to expand abreviations:
"CGS" = Centimeter, Gram, Second
"MKS" = Meter, Kilogram, Second
Both of them are metric. CGS is preferable, because a kilogram
and a meter are too big for indoor Model dimensions. And
probably much better are the milimeters and miligrams,
lets say "MMS".
Same goes for an inch. Its too big (IMHO) for many indoor
model parts, and force to use fractions (drive me crazy),
or values expressed on milesimal parts of inchs, like .009"
(thats is 9 mili-inch).
Anyway, this conversions are good exercice for brain :)
Bruce was asking for metric density unit. Normaly we use CGS, so
density is [g/cm^3]. just for reference: One gram per cubic
centimeter is the density if the water, and thats about
62,5 lb/cu ft.
Now, Jim, your impression is that in the USA use "cgs" more
than other system (on indoor community), but what about density
units for balsa wood?
Regards.
Ignacio.
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Received on Sun Apr 09 2006 - 21:06:13 CEST