1

Perimeter of section:

2

Section area:

3

Torsional inertia constant:

4

Torsional section modulus: elastic:

5

Torsional section modulus: plastic:

6

Torsional shape factor: plastic/elastic:

x-x(centroidal)

y-y

7

Second moment of area:

8

Section modulus: elastic:

9

''

Section modulus: plastic:

10

Shape factor: plastic/elastic:

11

Shear factor:

12

Shear effective area:

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