Metric units 1

[ajb12748]

I have a german catalog listing steel shapes and properties. There is a column with a heading "moment WX/cm3". What does this column mean?

How can it be used to select a beam designed from the determination of "I" and "S" in American units?

 

[cooperDBM]

I'll venture a guess. Since the units seem to be cm^3 I would guess that Wx is the section modulus (our "S"). This implies that W is the second moment of inertia (our "I") and x is the distance from the neutral axis. Does the magnitude of the numbers in the column seem about right?

1 inch = 2.54 cm

Hopefully you can get a definitive answer.

 

[rb1957]

section modulus is I/x, but the units are right ...

 

[Wollmann]

Wx is the equivalent of Sx - W stands for "Widerstandsmoment".
Moment of Inertia is usually denoted either Ix or Jx in German.

1000 cm3 = 61 in3

Gregor Wollmann

 

[rob768]

Downlad the program " convert.exe" from this site:

http://www.rcmodelbouw.nl/download.html

it works well in converting the old units to SI units and back

Wollman is right with his translation of W.