Channel Shape Tables

The follow details are used for channel shapes in standard database tables.

Note: The required first two columns for all standard databases are RecNo and Name.

Table 1. Channel shape default properties
Name	Description	Unit	Column No.
D	Depth	in	3
BF	Width of flanges	in	4
TF	Thickness of flanges	in	5
TW	Thickness of web	in	6
AX	Cross sectional area	In^2	7
IZ	Moment of inertia about 3-3 axis	in^4	8
IY	Moment of inertia about 2-2 axis	in^4	9
IX	Torsional moment of inertia	in^4	10
ZZ	Plastic modulus about 3-3 axis	in^3	11
ZY	Plastic modulus about 2-2 axis	in^3	12
E0	Distance from back of channel to centroid	in	13

Calculated Properties

The following section properties are calculated as indicated when they are not present for the profile.

Property

Formula

AX

= 2 b_{f} t_{f} + (D - 2 t_{f}) t_{w}

AY

= D \times t_{w}

AZ

= \frac{4}{3} b_{f} \times t_{f}

IX

= \frac{1}{3} [2 b_{f} {t_{f}}^{3} + (D - 2 t_{f}) {t_{w}}^{3}]

IY

= \frac{(D - 2 t_{f}) {t_{w}}^{3}}{3} + \frac{2 t_{f} {b_{f}}^{3}}{3} - \frac{{[\frac{1}{2} (D - 2 t_{f}) {t_{w}}^{2} + t_{f} {b_{f}}^{2}]}^{2}}{AX}

IZ

= [\frac{b_{f} D^{3}}{12}] - \frac{(b_{f} - t_{w}) {(D - 2 t_{f})}^{3}}{12}

SY

= \frac{IY}{b_{f} \times CT}

where

\frac{{b_{f}}^{2} t_{f} + \frac{1}{2} (D - 2 t_{f}) {t_{w}}^{2}}{AX}

SZ

= \frac{2 \times IZ}{D}

PY

= PY1 + PY2 + PY3

Case1

2 t_{f} (b_{f} - t_{w}) > D t_{w}

where

Case2

2 t_{f} (b_{f} - t_{w}) < D t_{w}

where

PZ

= b_{f} t_{f} (D - t_{f}) + \frac{1}{4} t_{w} {(D - 2 t_{f})}^{2}