TSN Product ::: JamStud®

Product Information

Material Composition

ASTM A1003/A1003M or ASTM A653/A653M, Grade 50 (340), 50ksi (340MPa) minimum yield strength, 65ksi (450 MPa) minimum tensile strength, G-60 (Z180) hot-dipped galvanized coating.

JamStud^® Product Profile
Section (All 50 ksi)	Overall Depth	Flange Width	Return Lip 1	Return Lip 2	Inside Bend	Design Thickness	Unit Weight
	D	B	d1	d2	R	t	(lbs/ft)
	(in)	(in)	(in)	(in)	(in)	(in)	(lbs/ft)
350JAM250-33	3.5	2.5	0.5892	0.5	0.105	0.0346	1.196
350JAM250-43	3.5	2.5	0.6102	0.5	0.105	0.0451	1.553
350JAM250-54	3.5	2.5	0.6332	0.5	0.105	0.0566	1.942
350JAM250-68	3.5	2.5	0.6626	0.5	0.105	0.0713	2.435
350JAM250-97	3.5	2.5	0.7234	0.5	0.105	0.1017	3.438
350JAM350-68	3.5	3.5	0.6626	0.5	0.105	0.0713	2.920
350JAM350-97	3.5	3.5	0.7234	0.5	0.105	0.1017	4.130
350JAM350-118	3.5	3.5	0.7684	0.5	0.105	0.1242	5.005
362JAM250-33	3.625	2.5	0.5892	0.5	0.105	0.0346	1.210
362JAM250-43	3.625	2.5	0.6102	0.5	0.105	0.0451	1.572
362JAM250-54	3.625	2.5	0.6332	0.5	0.105	0.0566	1.966
362JAM250-68	3.625	2.5	0.6626	0.5	0.105	0.0713	2.465
362JAM250-97	3.625	2.5	0.7234	0.5	0.105	0.1017	3.481
362JAM350-68	3.625	3.5	0.6626	0.5	0.105	0.0713	2.950
362JAM350-97	3.625	3.5	0.7234	0.5	0.105	0.1017	4.173
362JAM350-118	3.625	3.5	0.7684	0.5	0.105	0.1242	5.058
400JAM250-33	4	2.5	0.5892	0.5	0.105	0.0346	1.255
400JAM250-43	4	2.5	0.6102	0.5	0.105	0.0451	1.630
400JAM250-54	4	2.5	0.6332	0.5	0.105	0.0566	2.038
400JAM250-68	4	2.5	0.6626	0.5	0.105	0.0713	2.556
400JAM250-97	4	2.5	0.7234	0.5	0.105	0.1017	3.611
400JAM350-68	4	3.5	0.6626	0.5	0.105	0.0713	3.041
400JAM350-97	4	3.5	0.7234	0.5	0.105	0.1017	4.303
400JAM350-118	4	3.5	0.7684	0.5	0.105	0.1242	5.216
550JAM250-33	5.5	2.5	0.5892	0.5	0.105	0.0346	1.431
550JAM250-43	5.5	2.5	0.6102	0.5	0.105	0.0451	1.860
550JAM250-54	5.5	2.5	0.6332	0.5	0.105	0.0566	2.327
550JAM250-68	5.5	2.5	0.6626	0.5	0.105	0.0713	2.920
550JAM250-97	5.5	2.5	0.7234	0.5	0.105	0.1017	4.130
550JAM250-118	5.5	2.5	0.7684	0.5	0.105	0.1242	5.005
550JAM350-68	5.5	3.5	0.6626	0.5	0.105	0.0713	3.405
550JAM350-97	5.5	3.5	0.7234	0.5	0.105	0.1017	4.822
550JAM350-118	5.5	3.5	0.7684	0.5	0.105	0.1242	5.849
600JAM250-33	6	2.5	0.5892	0.5	0.105	0.0346	1.490
600JAM250-43	6	2.5	0.6102	0.5	0.105	0.0451	1.937
600JAM250-54	6	2.5	0.6332	0.5	0.105	0.0566	2.424
600JAM250-68	6	2.5	0.6626	0.5	0.105	0.0713	3.041
600JAM250-97	6	2.5	0.7234	0.5	0.105	0.1017	4.303
600JAM250-118	6	2.5	0.7684	0.5	0.105	0.1242	5.216
600JAM350-68	6	3.5	0.6626	0.5	0.105	0.0713	3.527
600JAM350-97	6	3.5	0.7234	0.5	0.105	0.1017	4.995
600JAM350-118	6	3.5	0.7684	0.5	0.105	0.1242	6.060
800JAM250-43	8	2.5	0.6102	0.5	0.105	0.0451	2.244
800JAM250-54	8	2.5	0.6332	0.5	0.105	0.0566	2.809
800JAM250-68	8	2.5	0.6626	0.5	0.105	0.0713	3.527
800JAM250-97	8	2.5	0.7234	0.5	0.105	0.1017	4.995
800JAM250-118	8	2.5	0.7684	0.5	0.105	0.1242	6.060
800JAM350-68	8	3.5	0.6626	0.5	0.105	0.0713	4.012
800JAM350-97	8	3.5	0.7234	0.5	0.105	0.1017	5.688
800JAM350-118	8	3.5	0.7684	0.5	0.105	0.1242	6.904

Notes:

Effective properties incorporate the strength increase from the cold-work of forming as applicable per AISI A7.2.
Tabulated gross properties are based on the full-unreduced cross section of the studs, away from punchouts.
Allowable moment is the lesser of M_al and M_ad. Stud distortional buckling is based on an assumed k_Φ = 0.
For deflection calculations, use the effective moment of inertia.
The effective moment of inertia for deflection is calculated at a stress which results in a section modulus such that the stress times the section modulus at that stress is equal to the allowable moment. AISI S100-07 Procedure I for serviceability determination has been used.

JamStud^® Section Properties: Gross Properties (for Un-punched Sections)
Section (All 50 ksi)	Area	I_x	S_x	R_x	I_y	R_y	Jx1000	C_w	R_o	X_o	m	ß
Section (All 50 ksi)	(in²)	(in⁴)	(in³)	(in)	(in⁴)	(in)	(in⁴)	(in⁶)	(in)	(in)	(in)	ß
350JAM250-33	0.351	0.734	0.419	1.445	0.329	0.967	0.140	1.206	3.025	-2.476	1.448	0.330
350JAM250-43	0.456	0.945	0.540	1.439	0.424	0.964	0.309	1.565	3.017	-2.471	1.445	0.329
350JAM250-54	0.571	1.171	0.669	1.432	0.526	0.960	0.609	1.953	3.008	-2.465	1.442	0.329
350JAM250-68	0.715	1.450	0.829	1.424	0.653	0.955	1.212	2.443	2.996	-2.457	1.439	0.328
350JAM250-97	1.010	1.999	1.142	1.406	0.904	0.946	3.483	3.431	2.972	-2.441	1.430	0.325
350JAM350-68	0.858	1.870	1.068	1.476	1.471	1.309	1.454	5.401	3.980	-3.456	1.965	0.246
350JAM350-97	1.214	2.586	1.478	1.460	2.050	1.300	4.184	7.627	3.958	-3.441	1.957	0.244
350JAM350-118	1.471	3.082	1.761	1.448	2.457	1.293	7.538	9.227	3.941	-3.430	1.951	0.243
362JAM250-33	0.356	0.795	0.438	1.495	0.333	0.968	0.142	1.277	3.031	-2.453	1.437	0.345
362JAM250-43	0.462	1.024	0.565	1.489	0.430	0.964	0.313	1.656	3.023	-2.447	1.435	0.344
362JAM250-54	0.578	1.269	0.700	1.482	0.533	0.961	0.617	2.066	3.014	-2.442	1.432	0.344
362JAM250-68	0.724	1.573	0.868	1.474	0.662	0.956	1.227	2.583	3.002	-2.434	1.428	0.342
362JAM250-97	1.023	2.169	1.197	1.456	0.916	0.946	3.527	3.625	2.977	-2.418	1.420	0.340
362JAM350-68	0.867	2.023	1.116	1.528	1.491	1.311	1.469	5.715	3.977	-3.430	1.954	0.256
362JAM350-97	1.226	2.801	1.545	1.511	2.078	1.302	4.228	8.065	3.955	-3.415	1.947	0.254
362JAM350-118	1.486	3.340	1.843	1.499	2.491	1.295	7.617	9.753	3.938	-3.404	1.941	0.253
400JAM250-33	0.369	0.995	0.497	1.643	0.346	0.969	0.147	1.506	3.055	-2.386	1.407	0.390
400JAM250-43	0.479	1.283	0.641	1.637	0.446	0.965	0.325	1.951	3.046	-2.381	1.404	0.389
400JAM250-54	0.599	1.591	0.796	1.630	0.554	0.962	0.640	2.432	3.037	-2.375	1.401	0.388
400JAM250-68	0.751	1.975	0.987	1.622	0.688	0.957	1.273	3.038	3.025	-2.368	1.398	0.387
400JAM250-97	1.061	2.730	1.365	1.604	0.953	0.948	3.658	4.255	3.000	-2.352	1.390	0.386
400JAM350-68	0.894	2.525	1.263	1.681	1.547	1.316	1.514	6.736	3.976	-3.354	1.922	0.288
400JAM350-97	1.265	3.503	1.751	1.664	2.158	1.306	4.360	9.488	3.953	-3.339	1.915	0.286
400JAM350-118	1.533	4.184	2.092	1.652	2.587	1.299	7.855	11.458	3.936	-3.328	1.909	0.285
550JAM250-33	0.421	2.063	0.750	2.215	0.390	0.962	0.168	2.703	3.239	-2.158	1.300	0.556
550JAM250-43	0.547	2.667	0.970	2.209	0.503	0.959	0.371	3.497	3.230	-2.153	1.297	0.556
550JAM250-54	0.684	3.317	1.206	2.202	0.625	0.956	0.730	4.352	3.221	-2.147	1.294	0.556
550JAM250-68	0.858	4.129	1.501	2.194	0.776	0.951	1.454	5.423	3.208	-2.139	1.290	0.555
550JAM250-97	1.214	5.747	2.090	2.176	1.077	0.942	4.184	7.559	3.183	-2.123	1.282	0.555
550JAM250-118	1.471	6.881	2.502	2.163	1.285	0.935	7.538	9.058	3.163	-2.111	1.275	0.555
550JAM350-68	1.001	5.180	1.883	2.275	1.743	1.320	1.696	12.048	4.054	-3.084	1.806	0.421
550JAM350-97	1.417	7.228	2.629	2.259	2.434	1.311	4.886	16.898	4.029	-3.069	1.798	0.420
550JAM350-118	1.719	8.673	3.154	2.246	2.921	1.304	8.809	20.344	4.012	-3.057	1.792	0.419
600JAM250-33	0.438	2.522	0.841	2.400	0.402	0.958	0.175	3.209	3.326	-2.094	1.269	0.604
600JAM250-43	0.569	3.261	1.087	2.394	0.519	0.955	0.386	4.150	3.317	-2.088	1.266	0.604
600JAM250-54	0.712	4.058	1.353	2.387	0.644	0.951	0.760	5.163	3.307	-2.082	1.263	0.604
600JAM250-68	0.894	5.055	1.685	2.378	0.801	0.947	1.514	6.431	3.295	-2.074	1.259	0.604
600JAM250-97	1.265	7.047	2.349	2.361	1.111	0.937	4.360	8.956	3.269	-2.058	1.250	0.604
600JAM250-118	1.533	8.447	2.816	2.348	1.327	0.930	7.855	10.726	3.250	-2.045	1.244	0.604
600JAM350-68	1.036	6.309	2.103	2.467	1.799	1.318	1.756	14.285	4.106	-3.006	1.771	0.464
600JAM350-97	1.468	8.816	2.939	2.451	2.513	1.308	5.061	20.020	4.081	-2.990	1.763	0.463
600JAM350-118	1.781	10.588	3.529	2.438	3.017	1.302	9.127	24.090	4.063	-2.978	1.757	0.463
800JAM250-43	0.659	6.378	1.595	3.110	0.572	0.931	0.447	7.513	3.746	-1.869	1.159	0.751
800JAM250-54	0.825	7.949	1.987	3.103	0.710	0.927	0.881	9.340	3.736	-1.862	1.156	0.752
800JAM250-68	1.036	9.923	2.481	3.095	0.883	0.923	1.756	11.624	3.724	-1.854	1.151	0.752
800JAM250-97	1.468	13.893	3.473	3.076	1.225	0.914	5.061	16.161	3.698	-1.838	1.142	0.753
800JAM250-118	1.781	16.707	4.177	3.063	1.464	0.907	9.127	19.330	3.679	-1.825	1.136	0.754
800JAM350-68	1.179	12.165	3.041	3.212	1.990	1.299	1.998	25.787	4.413	-2.733	1.648	0.616
800JAM350-97	1.671	17.065	4.266	3.195	2.782	1.290	5.762	36.082	4.388	-2.717	1.640	0.617
800JAM350-118	2.029	20.553	5.138	3.183	3.341	1.283	10.398	43.367	4.370	-2.705	1.633	0.617

Notes:

Effective properties incorporate the strength increase from the cold-work of forming as applicable per AISI A7.2.
Tabulated gross properties are based on the full-unreduced cross section of the studs, away from punchouts.
Allowable moment is the lesser of M_al and M_ad. Stud distortional buckling is based on an assumed k_Φ = 0.
For deflection calculations, use the effective moment of inertia.
The effective moment of inertia for deflection is calculated at a stress which results in a section modulus such that the stress times the section modulus at that stress is equal to the allowable moment. AISI S100-07 Procedure I for serviceability determination has been used.

JamStud^® Section Properties
Section (All 50 ksi)	Effective Properties 50 ksi ("net" = Punched Sections)													Effective Properties if limited to 33 ksi Strength
	I_x	S_x	S_{x (net)}	M_al	M_{al (net)}	M_ad	V_a	V_{a (net)}	I_ye¹	M_yal¹	M_yad¹	I_ye²	M_yal²	I_xe	M_al	M_al(net)	M_ad
	(in⁴)	(in³)	(in³)	(kips-in)	(kips-in)	(kips-in)	(lb)	(lb)	(in⁴)	(kips-in)	(kips-in)	(in⁴)	(kips-in)	(in⁴)	(kips-in)	(kips-in)	(kips-in)
350JAM250-33	0.692	0.331	0.300	9.904	8.995	9.106	1145	527	0.329	6.761	6.157	0.273	5.897	0.714	7.010	6.548	6.973
350JAM250-43	0.933	0.447	0.418	13.371	12.505	13.045	2141	747	0.424	8.738	8.738	0.383	8.097	0.945	9.764	9.389	9.864
350JAM250-54	1.171	0.571	0.545	17.099	16.324	17.616	3371	925	0.526	10.864	10.864	0.508	10.390	1.171	12.370	12.069	13.136
350JAM250-68	1.450	0.748	0.728	22.400	21.809	23.676	4208	900	0.653	13.522	13.522	0.653	13.302	1.450	17.765	17.494	16.378
350JAM250-97	1.999	1.125	1.107	37.597	37.006	34.192	5886	850	0.904	18.806	18.806	0.904	18.806	1.999	25.603	25.240	22.567
350JAM350-68	1.812	0.804	0.774	24.073	23.179	26.651	4208	900	1.471	22.321	22.321	1.471	21.873	1.866	17.681	17.250	20.057
350JAM350-97	2.574	1.267	1.238	37.945	37.068	42.171	5886	850	2.050	31.234	31.234	2.050	31.234	2.586	30.448	29.989	29.198
350JAM350-118	3.082	1.670	1.644	50.000	49.221	52.725	7073	814	2.457	37.545	37.545	2.457	37.545	3.082	37.714	37.206	34.798
362JAM250-33	0.750	0.347	0.313	10.387	9.375	9.461	1102	544	0.333	6.795	6.079	0.273	5.910	0.774	7.345	6.827	7.249
362JAM250-43	1.011	0.468	0.435	14.012	13.038	13.565	2141	802	0.430	8.783	8.663	0.384	8.106	1.024	10.223	9.796	10.265
362JAM250-54	1.269	0.598	0.569	17.908	17.031	18.335	3372	994	0.533	10.921	10.921	0.511	10.406	1.269	12.944	12.598	13.687
362JAM250-68	1.573	0.783	0.761	23.449	22.775	24.670	4375	1007	0.662	13.593	13.593	0.662	13.332	1.573	18.596	18.333	17.149
362JAM250-97	2.169	1.178	1.161	39.389	38.814	35.835	6124	954	0.916	18.908	18.908	0.916	18.908	2.169	26.833	26.483	23.651
362JAM350-68	1.961	0.841	0.808	25.186	24.190	27.689	4375	1007	1.491	22.444	22.444	1.491	21.921	2.019	18.481	18.050	20.857
362JAM350-97	2.787	1.325	1.296	39.672	38.798	43.895	6124	954	2.078	31.410	31.410	2.078	31.410	2.801	31.821	31.370	30.533
362JAM350-118	3.340	1.746	1.721	52.284	51.518	55.170	7363	917	2.491	37.760	37.760	2.491	37.760	3.340	39.444	38.948	36.412
400JAM250-33	0.941	0.397	0.351	11.873	10.514	10.530	991	589	0.346	6.891	5.819	0.275	5.944	0.971	8.375	7.661	8.083
400JAM250-43	1.268	0.534	0.489	15.981	14.635	15.133	2141	967	0.446	8.908	8.380	0.389	8.130	1.283	11.631	11.014	11.479
400JAM250-54	1.591	0.681	0.640	20.397	19.150	20.506	3372	1201	0.554	11.077	11.077	0.520	10.449	1.591	14.708	14.190	15.351
400JAM250-68	1.975	0.891	0.858	26.669	25.675	27.679	4876	1360	0.688	13.790	13.790	0.686	13.411	1.975	21.143	19.215	19.511
400JAM250-97	2.730	1.343	1.351	44.884	40.448	40.871	6839	1299	0.953	19.189	19.189	0.953	19.189	2.730	30.605	30.288	26.975
400JAM350-68	2.447	0.955	0.909	28.602	27.223	30.818	4876	1360	1.547	22.789	22.789	1.530	22.043	2.519	20.930	20.378	23.268
400JAM350-97	3.483	1.502	1.473	44.961	44.092	49.104	6839	1299	2.158	31.903	31.903	2.158	31.903	3.503	36.019	35.587	34.610
400JAM350-118	4.184	1.980	1.955	59.268	58.533	62.640	8235	1256	2.587	38.361	38.361	2.587	38.361	4.184	44.732	44.265	41.343
550JAM250-33	1.974	0.572	0.572	17.118	17.118	14.859	706	703	0.390	7.183	4.661	0.280	6.030	2.019	12.848	12.848	11.473
550JAM250-43	2.644	0.820	0.820	24.561	24.561	21.511	1570	1193	0.503	9.288	6.962	0.400	8.190	2.667	17.716	17.716	16.435
550JAM250-54	3.317	1.043	1.043	31.227	31.227	29.377	3117	1875	0.625	11.554	9.763	0.542	10.559	3.317	22.334	22.334	22.187
550JAM250-68	4.129	1.357	1.357	40.642	40.642	40.041	5350	2534	0.776	14.391	13.625	0.728	13.608	4.129	32.111	32.111	29.669
550JAM250-97	5.747	2.051	2.051	68.578	68.578	62.565	9700	3167	1.077	20.045	20.045	1.077	19.791	5.747	46.849	46.849	41.293
550JAM250-118	6.881	2.502	2.502	85.210	85.210	74.914	11723	3100	1.285	24.010	24.010	1.285	24.010	6.881	57.274	57.274	49.443
550JAM350-68	4.933	1.450	1.450	43.421	43.421	43.539	5350	2534	1.743	23.876	22.948	1.613	22.354	5.144	31.469	31.469	33.109
550JAM350-97	7.160	2.262	2.262	67.718	67.718	70.434	9700	3167	2.434	33.453	33.453	2.434	32.810	7.228	53.935	53.935	51.941
550JAM350-118	8.673	2.976	2.976	89.112	89.112	91.138	11723	3100	2.921	40.250	40.250	2.921	40.250	8.673	67.271	67.271	62.319
600JAM250-33	2.419	0.626	0.626	18.750	18.750	16.312	644	644	0.402	7.257	4.305	0.281	6.049	2.472	14.179	14.179	12.615
600JAM250-43	3.239	0.919	0.919	27.502	27.502	23.662	1432	1235	0.519	9.385	6.495	0.403	8.203	3.261	19.902	19.902	18.114
600JAM250-54	4.058	1.174	1.174	35.140	35.140	32.383	2843	1942	0.644	11.676	9.203	0.546	10.582	4.058	25.073	25.073	24.516
600JAM250-68	5.055	1.526	1.526	45.679	45.679	44.254	5350	2882	0.801	14.544	13.002	0.737	13.650	5.055	36.037	36.037	33.017
600JAM250-97	7.047	2.305	2.305	77.070	77.070	70.137	10653	3964	1.111	20.261	20.261	1.111	19.891	7.047	52.663	52.663	46.417
600JAM250-118	8.447	2.816	2.816	95.893	95.893	84.306	12885	3889	1.327	24.274	24.274	1.327	24.264	8.447	64.455	64.455	55.642
600JAM350-68	6.023	1.628	1.628	48.757	48.757	47.851	5350	2882	1.799	24.160	21.969	1.631	22.421	6.263	35.238	35.238	36.455
600JAM350-97	8.729	2.534	2.534	75.856	75.856	77.711	10653	3964	2.513	33.858	33.858	2.512	32.975	8.816	60.297	60.297	57.903
600JAM350-118	10.588	3.331	3.331	99.720	99.720	100.837	12885	3889	3.017	40.744	40.744	3.017	40.527	10.588	75.265	75.265	69.743
800JAM250-43	6.368	1.225	1.225	36.664	36.664	32.254	1060	1060	0.572	9.679	4.983	0.409	8.238	6.378	29.006	29.006	24.861
800JAM250-54	7.949	1.700	1.700	50.893	50.893	44.463	2102	2102	0.710	12.044	7.286	0.560	10.645	7.949	36.991	36.991	33.939
800JAM250-68	9.923	2.260	2.260	67.676	67.676	61.309	4219	3368	0.883	15.007	10.671	0.763	13.763	9.923	53.065	53.065	46.207
800JAM250-97	13.893	3.409	3.409	113.945	113.945	98.919	10885	6032	1.225	20.919	18.725	1.187	20.155	13.893	77.866	77.866	68.632
800JAM250-118	16.707	4.177	4.177	142.242	142.242	125.055	16182	7301	1.464	25.073	25.017	1.464	24.681	16.707	95.609	95.609	82.536
800JAM350-68	11.749	2.406	2.406	72.028	72.028	65.370	4219	3368	1.990	25.049	18.170	1.681	22.600	12.092	51.562	51.562	50.106
800JAM350-97	16.927	3.711	3.711	111.105	111.105	107.517	10885	6032	2.782	35.121	31.925	2.645	33.415	17.065	87.651	87.651	80.787
800JAM350-118	20.553	4.855	4.855	145.369	145.369	140.775	16182	7301	3.341	42.281	42.281	3.337	41.240	20.553	109.593	109.593	101.536

Notes:

Effective properties incorporate the strength increase from the cold-work of forming as applicable per AISI A7.2.
Tabulated gross properties are based on the full-unreduced cross section of the studs, away from punchouts.
Allowable moment is the lesser of M_al and M_ad. Stud distortional buckling is based on an assumed k_Φ = 0.
For deflection calculations, use the effective moment of inertia.
The effective moment of inertia for deflection is calculated at a stress which results in a section modulus such that the stress times the section modulus at that stress is equal to the allowable moment. AISI S100-07 Procedure I for serviceability determination has been used.

JamStud^® Design Example


1. Basis for Tables:

The JamStud^® allowable heights tables on this site cover the following basic load combination for strength determination using the Allowable Stress Design (ASD) Method (IBC 2009/2012 and ASCE 7-05/10):
	D + W_C&C D + 0.6W_C&C	(ASCE 7-05) (ASCE 7-10)

W_C&C is the component & cladding wind load. The Dead Load (D) acting on the stud is assumed minimum and therefore neglected in the tables.

For deflection determination IBC 2009 and IBC 2012-Sec. 1604.3 and AISI-S211-07 Wall Stud Design Standard Sec. A3.1 allow for a reduction factor of 0.7 on the component & cladding wind load (0.7W_C&C).

The "JamStud^® - Allowable Heights" tables are based on the following assumptions:
	4-Way distribution of lateral wind pressure acting on the opening Opening height extends from floor level to the bottom surface of the header Jamb member supports wind pressure from opening, wind pressure from half distance to adjacent stud, and header reaction

The input for the tables include: the JamStud section, the opening width (ft.), the opening height (ft.), the design wind pressure (WC&C, psf), and the specified deflection limit. The output from the tables reflects the allowable JamStud height (ft.-in.) and the controlling design factor, whether it is strength or deflection (“f” denotes strength, “d” denotes deflection). An "*" denotes critical web crippling at support of jamb. The use of stiffening clips at supports typically eliminates the web crippling condition.

2. Design Example:

	Given: Wind Pressure (WC&C)(ASCE 7-05) or (0.6WC&C)(ASCE 7-10) Wall Width Wall Height Opening Width Opening Height Stud Spacing Specified Deflection Limit Typical Stud	= 30 psf = 6.0 in. = 14.0 ft. = 8.0 ft. = 10.0 ft. = 16 in. o.c. = L/360 600S162-43

Bridging (Lateral Bracing) is recommended at a vertical spacing of 60” o.c. with both JamStud flanges connected to the sheathing.

Design Jamb:

Go to the “JamStud – Allowable Heights” table with 6” stud member, 30 psf wind load, L/360 deflection limit, 8.0 ft. opening width, and 10.0 ft. opening height. Possible JamStud selections from table for 14.0 ft. height are 600JAM250-97 (allowable height = 15’ 0”) and 600JAM350-68 (allowable height = 14’ 6”). The alternative with typical 43mil “cee” studs result in a built-up section comprised of (3) 600S162-43 capped by (2) 600T162-43.

Conclusion:

The second option, 600JAM350-68, is a lighter section with a lesser thickness. Use 600JAM350-68 (50ksi) (with design thickness = 0.0713” and Fy = 50 ksi). Allow 2 rows of bridging for the wall (including jamb stud) arranged so that the maximum spacing does not exceed 60 in. (5 ft.).

3. Extra Design Considerations:

Strength determination in the “JamStud – Allowable Heights” tables includes checks for bending and shear capacity values of the stud and a check for lateral end reaction of the stud for web crippling. If tables indicate critical web crippling (denoted with an “*”), you may use a clip at the top and bottom ends of stud to eliminate the web crippling condition.

Design Comparison of Jamb Members

TSN's Product Catalogs are an essential resource for the design of cold formed steel. Developed by Engineers, the catalogs contain design data for members connectors, and fasteners.

JamStud^® and the rest of TSN's Curtain Wall Member Products can be found in the following Catalogs:

TSN Exterior Wall Members & Accessories
Technical Catalog

TSN Exterior Wall Members & Accessories
Order Catalog

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