1

Perimeter of section:

2

Section area:

3

Torsional inertia constant:

4

Torsional section modulus:

x-x

y-y

5

Second moment of area:

6

Section modulus: elastic:

7

''

Section modulus: plastic:

8

Shape factor: plastic/elastic:

9

Shear factor:

10

Shear effective area:

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