S-Shapes (Std Beams)

ASTM A6 · 31 sections

Free Reference Data

S-shapes (Standard Beams) are ASTM A6 I-sections with sloped inner flanges. The original American standard beam profile, still used in crane runway girders and special applications where the tapered flange is advantageous.

Designation	h (mm)	b (mm)	t_w (mm)	t_f (mm)	A (cm²)	G (kg/m)	I_y (cm⁴)	W_y (cm³)
S 3×5.7	76	59	7.9	6.9	10.8	8.5	153	40.3
S 3×7.5	76	65	11.7	6.9	14.2	11.2	182	47.7
S 4×7.7	102	66	7.7	7.7	14.6	11.5	385	75.6
S 4×9.5	102	70	11.2	7.7	18.1	14.1	441	86.6
S 5×10	127	70	7.9	8.6	19	14.9	764	120
S 5×14.75	127	76	12.4	8.6	28	22	917	144
S 6×12.5	152	76	8.1	9.1	23.7	18.6	1460	192
S 6×17.25	152	82	11.7	9.1	32.7	25.7	1730	228
S 7×15.3	178	83	8.9	9.9	29	22.8	2680	301
S 7×20	178	88	12.4	9.9	38	29.8	3120	351
S 8×18.4	203	89	9.1	10.9	34.8	27.4	5120	504
S 8×23	203	93	12.7	10.9	43.6	34.2	5880	580
S 10×25.4	254	103	9.7	12.4	48.1	37.8	11700	921
S 10×35	254	109	14.5	12.4	66.3	52.1	14100	1110
S 12×31.8	305	108	9.1	13.8	60.3	47.3	23800	1560
S 12×35	305	109	10.9	13.8	66.3	52.1	25700	1690
S 12×40.8	305	111	13.5	13.8	77.4	60.7	28500	1870
S 12×50	305	116	17.8	13.8	94.8	74.4	33700	2210
S 15×42.9	381	127	11.2	15.5	81.4	63.9	56100	2950
S 15×50	381	130	14	15.5	94.8	74.4	62400	3280
S 18×54.7	457	138	12.2	17.1	104	81.5	116000	5080
S 18×70	457	143	16.5	17.1	133	104	134000	5870
S 20×66	508	152	13.5	17.4	125	98.2	194000	7640
S 20×75	508	154	15.9	17.4	142	112	214000	8430
S 20×86	508	157	18.3	17.4	163	128	235000	9250
S 20×96	508	159	20.6	17.4	182	143	254000	10000
S 24×80	610	162	14	19	152	119	395000	12900
S 24×90	610	164	16.3	19	171	134	428000	14000
S 24×100	610	165	18.3	19	190	149	462000	15100
S 24×106	610	166	19.3	19	201	158	477000	15600
S 24×121	610	168	22.4	19	229	180	523000	17100