Torsional Properties^1,2
C-Sections

Section	J	Cw	j	x0		Section	J	Cw	j	x0
	in.4	in.6	in.	in.			in.4	in.6	in.	in.
12 X 4.0 C 12 G	0.00808	122.394	6.739	-2.633		8 X 4.0 C 12 G	0.00654	50.434	4.920	-3.064
12 X 4.0 C 13 G	0.00429	98.497	6.759	-2.623		8 X 4.0 C 13 G	0.00347	40.443	4.932	-3.051
12 X 4.0 C 14 G	0.00239	80.752	6.774	-2.614		8 X 4.0 C 14 G	0.00194	33.073	4.941	-3.041
						8 X 4.0 C 15 G	0.00155	30.639	4.944	-3.038
12 X 3.5 C 12 G	0.00769	89.127	6.806	-2.232		8 X 4.0 C 16 G	0.00116	27.733	4.948	-3.034
12 X 3.5 C 13 G	0.00408	71.748	6.831	-2.222
12 X 3.5 C 14 G	0.00228	58.833	6.849	-2.215		8 X 3.5 C 12 G	0.00615	36.728	4.661	-2.622
						8 X 3.5 C 13 G	0.00326	29.459	4.678	-2.611
12 X 2.5 C 12 G	0.00692	40.427	7.557	-1.465		8 X 3.5 C 14 G	0.00182	24.094	4.690	-2.602
12 X 2.5 C 13 G	0.00367	32.605	7.590	-1.459		8 X 3.5 C 15 G	0.00146	22.322	4.694	-2.599
12 X 2.5 C 14 G	0.00205	26.770	7.614	-1.454		8 X 3.5 C 16 G	0.00109	20.206	4.699	-2.595
10 X 4.0 C 12 G	0.00731	81.725	5.702	-2.830		8 X 2.5 C 12 G	0.00538	16.690	4.391	-1.765
10 X 4.0 C 13 G	0.00388	65.684	5.718	-2.818		8 X 2.5 C 13 G	0.00285	13.412	4.418	-1.757
10 X 4.0 C 14 G	0.00217	53.801	5.731	-2.809		8 X 2.5 C 14 G	0.00159	10.984	4.439	-1.751
10 X 4.0 C 15 G	0.00173	49.868	5.735	-2.806		8 X 2.5 C 15 G	0.00128	10.180	4.445	-1.748
						8 X 2.5 C 16 G	0.00095	9.219	4.453	-1.746
10 X 3.5 C 12 G	0.00692	59.520	5.590	-2.409
10 X 3.5 C 13 G	0.00367	47.851	5.611	-2.399		8 X 2.0 C 12 G	0.00499	9.949	4.500	-1.354
10 X 3.5 C 14 G	0.00205	39.201	5.626	-2.391		8 X 2.0 C 13 G	0.00265	8.015	4.535	-1.348
10 X 3.5 C 15 G	0.00164	36.338	5.631	-2.388		8 X 2.0 C 14 G	0.00148	6.575	4.560	-1.344
						8 X 2.0 C 15 G	0.00118	6.098	4.568	-1.342
10 X 2.5 C 12 G	0.00615	27.031	5.777	-1.600		8 X 2.0 C 16 G	0.00089	5.526	4.578	-1.340
10 X 2.5 C 13 G	0.00326	21.773	5.808	-1.592
10 X 2.5 C 14 G	0.00182	17.860	5.831	-1.587		7 X 4.0 C 12 G	0.00615	38.086	4.627	-3.200
10 X 2.5 C 15 G	0.00146	16.562	5.839	-1.585		7 X 4.0 C 13 G	0.00326	30.485	4.637	-3.185
						7 X 4.0 C 14 G	0.00182	24.897	4.644	-3.175
10 X 2.0 C 12 G	0.00576	16.097	6.280	-1.217		7 X 4.0 C 15 G	0.00146	23.055	4.646	-3.171
10 X 2.0 C 13 G	0.00306	12.998	6.316	-1.211		7 X 4.0 C 16 G	0.00109	20.858	4.649	-3.167
10 X 2.0 C 14 G	0.00171	10.681	6.342	-1.207
10 X 2.0 C 15 G	0.00137	9.910	6.351	-1.206		7 X 2.5 C 12 G	0.00499	12.604	3.847	-1.864
						7 X 2.5 C 13 G	0.00265	10.110	3.872	-1.855
9 X 2.5 C 12 G	0.00576	21.490	5.034	-1.678		7 X 2.5 C 14 G	0.00148	8.268	3.891	-1.848
9 X 2.5 C 13 G	0.00306	17.293	5.064	-1.670		7 X 2.5 C 15 G	0.00118	7.659	3.897	-1.845
9 X 2.5 C 14 G	0.00171	14.175	5.086	-1.664		7 X 2.5 C 16 G	0.00089	6.932	3.904	-1.843
9 X 2.5 C 15 G	0.00137	13.142	5.093	-1.662
9 X 2.5 C 16 G	0.00102	11.906	5.102	-1.660

II-B-1

15 October 1998