The following table gives a selection of prototype rail sections with their dimensions. It is not exhaustive but does include US (ASCE, ARA, AREA, AREMA, Dudley and named railroads) in red, UK (BS sections and named railways) in black, Australian & NZ (NZR, NSW, VR, WAGR and AS) (green) and other sections (including German standards) in blue. The column giving the height in thou gives the code number of the rail for S Scale. Dimensions in Italics are measured from drawings and will be close but may not be 100% accurate. Further detail on permanent way including drawings can be found at this website.

		Bullhead Rail
Prototype				S Scale dimensions
Weight lbs/yd	Height (inches)	Width of foot (inches)	Width of head (inches)	Height (Thou) =code	Width of foot (Thou)	Width of head (Thou)	Height (mm)	Width of foot (mm)	Width of head (mm)	Type
46/48.5	4 1/4	2	2	66	31	31	1.69	0.79	0.79	Festiniog after 1868 Wrought iron
50	4 3/8	2 1/8	2 1/8	68	33	33	1.74	0.84	0.84	Festiniog 1878
50	4 1/2	1 3/4	2 1/8	70	27	33	1.79	0.69	0.84	Penrhyn Quarry Iron 1876
60	4 3/4	2 5/16	2 5/16	74	36	36	1.89	0.92	0.92	BS9
65	4 1/2	2 1/2	2 1/2	70	39	39	1.79	0.99	0.99	L & B R Double headed Iron rail c1840
65	4 7/8	2 3/8	2 3/8	76	37	37	1.93	0.94	0.94	BS9
69	5	2 3/8	2 3/8	78	37	37	1.98	0.94	0.94	Bombay Baroda & Central India 69lb
70	5	2 7/16	2 7/16	78	38	38	1.98	0.97	0.97	BS9
72	5 9/64	2	2 15/32	80	31	39	2.04	0.79	0.98	LTSR 72lb
75	5	2 1/2	2 1/2	78	39	39	1.98	0.99	0.99	L & B R Double headed Iron rail c1840
75	5 1/8	2 1/2	2 1/2	80	39	39	2.03	0.99	0.99	BS9
75.798	5.276	2.402	2.402	82	38	38	2.09	0.95	0.95	CF du Midi (double headed) 37.6Kg/m
76 1/2	5 9/32	2 1/2	2 1/2	83	39	39	2.10	0.99	0.99	HR 76.5lb
76.604	5.213	2.362	2.362	81	37	37	2.07	0.94	0.94	CF de l'Etat and Paris-Orleans (double headed) 38Kg/m
77	5 5/16	2 3/8	2 1/2	83	37	39	2.11	0.94	0.99	HR 77lb
78.016	5.118	2.441	2.441	80	38	38	2.03	0.97	0.97	Ouest-Etat (double headed) 38.7 Kg/m
80	5 1/4	2 35/64	2 35/64	82	40	40	2.08	1.01	1.01	Victorian Railways 80lb
80	5 9/32	2 15/32	2 1/2	83	39	39	2.10	0.98	0.99	HR 80lb
80	5 3/8	2 9/16	2 9/16	84	40	40	2.13	1.02	1.02	BS9
80	5 3/8	2	2 5/8	84	31	41	2.13	0.79	1.04	LTSR 80lb
80	5 13/32	2 15/32	2 7/16	84	39	38	2.15	0.98	0.97	Cam Rys 80lb
80	5 17/32	2 9/16	1 9/16	86	40	24	2.20	1.02	0.62	NSWGR 80lb
80	5 9/16	2 5/16	2 5/16	87	36	36	2.21	0.92	0.92	LNWR 80lb
80 1/2	5 11/16	2	2 1/2	89	31	39	2.26	0.79	0.99	Furness 80.5lb
80.636	5.709	2.756	2.362	89	43	37	2.27	1.09	0.94	CF de l'Etat (Bullhead) 40Kg/m
81		1 7/8	2 9/16	0	29	40	0.00	0.74	1.02	Midland Railway 1870
82	5 1/4	2 1/2	2 1/2	82	39	39	2.08	0.99	0.99	SER 82lb
82	5 1/2	2 7/16	2 1/2	86	38	39	2.18	0.97	0.99	Bombay Baroda & Central India 82lb
83		2 7/16	2 9/16	0	38	40	0.00	0.97	1.02	Midland Railway 1875
84	5 11/32	2 21/32	2 21/32	83	42	42	2.12	1.05	1.05	LBSCR 84lb
84	5 3/8	2 1/2	2 1/2	84	39	39	2.13	0.99	0.99	NBR 84lb
85	5 7/16	2 7/16	2 5/8	85	38	41	2.16	0.97	1.04	GER 85lb
85	5 15/32	2 11/16	2 11/16	85	42	42	2.17	1.07	1.07	BS9
85	5 1/2	2 5/8	2 11/16	86	41	42	2.18	1.04	1.07	GNR 85lb 1892
85	5 1/2	2 5/8	2 5/8	86	41	41	2.18	1.04	1.04	GNRI 85lb
85	5.55	2 1/2	2.7	87	39	42	2.20	0.99	1.07	East Indian Rly 85lb
85	5 41/64	2 5/8	2 5/8	88	41	41	2.24	1.04	1.04	MR 85lb 1888
85 1/2	5 11/32	2 39/64	2 39/64	83	41	41	2.12	1.04	1.04	SECR 85.5lb
85.676	5.709	2.362	2.362	89	37	37	2.27	0.94	0.94	Paris-Orleans (Bullhead) 42.5Kg/m
86	5 1/2	2 1/2	2 3/4	86	39	43	2.18	0.99	1.09	G.W.R. 68d 1882 First GWR bullhead section.
86	5 1/2	2 5/8	2 5/8	86	41	41	2.18	1.04	1.04	GCR & MSLR 86lb
86	5 1/2	2 21/32	2 21/32	86	42	42	2.18	1.05	1.05	L&YR 86lb
87	5 9/16	2 1/2	2 15/32	87	39	39	2.21	0.99	0.98	LSWR 87lb
87	5 3/4	2 11/16	2 11/16	90	42	42	2.28	1.07	1.07	Great Southern & Western 87lb
88	5 35/64	2 17/32	2 11/16	87	40	42	2.20	1.00	1.07	FR 88lb
88	5 9/16	2 1/2	2 1/2	87	39	39	2.21	0.99	0.99	H&BR 88lb
88.700	5.512	2.441	2.441	86	38	38	2.19	0.97	0.97	Ouest-Etat (Bullhead) 44Kg/m
90	5 31/64	2 23/32	2 23/32	86	42	42	2.18	1.08	1.08	LNWR 90lb
90	5 1/2	2 5/8	2 5/8	86	41	41	2.18	1.04	1.04	GSWR 90lb
90	5 35/64	2 3/4	2 3/4	87	43	43	2.20	1.09	1.09	BS9
90	5 19/32	2 19/32	2 19/32	87	41	41	2.22	1.03	1.03	CR 90lb
90	5 5/8	2 1/2	2 1/2	88	39	39	2.23	0.99	0.99	LSWR 90lb
90	5 21/32	2 17/32	2 17/32	88	40	40	2.24	1.00	1.00	NER 90lb
90	5 11/16	2 5/8	2 5/8	89	41	41	2.26	1.04	1.04	HR 90lb
90	5 11/16	2 1/2	2 5/8	89	39	41	2.26	0.99	1.04	GNRI 90lb
91 1/4	5 3/4	2 1/2	2 1/2	90	39	39	2.28	0.99	0.99	SECR 91.25lb
92	5 15/32	2 7/16	2 7/16	85	38	38	2.17	0.97	0.97	NBR 92lb
92	5 3/4	2 3/4	2 3/4	90	43	43	2.28	1.09	1.09	G.W.R. GW92 1894
93.236	5.984	2.756	2.441	94	43	38	2.38	1.09	0.97	Ouest-Etat (Bullhead) 46.25 Kg/m
95	5 23/32	2 3/4	2 3/4	89	43	43	2.27	1.09	1.09	BS9
95	5 3/4	2 3/4	2 3/4	90	43	43	2.28	1.09	1.09	G.W.R. GW95 1897 and GW00 1900
95	5 3/4	2 3/4	2 3/4	90	43	43	2.28	1.09	1.09	GER 95lb
95	5 3/4	2 3/4	2 3/4	90	43	43	2.28	1.09	1.09	LBSCR 95lb
96	5 23/32	2 3/4	2 3/4	89	43	43	2.27	1.09	1.09	GCR
96	5 23/32	2 3/4	2 3/4	89	43	43	2.27	1.09	1.09	GCR 96lb
96	5 4/5	2 53/64	2 3/4	91	44	43	2.30	1.12	1.09	GNR 96lb
97 1/2	5 3/4	2 3/4	2 3/4	90	43	43	2.28	1.09	1.09	GWR 97.5lb
100	5 13/16	2 13/16	2 13/16	91	44	44	2.31	1.12	1.12	MR100lb
100	5 29/32	2 3/4	2 3/4	92	43	43	2.34	1.09	1.09	BS9
100.33	5 1/16	2 13/16	2 13/16	79	44	44	2.01	1.12	1.12	Midland Railway 1897
103	6	2 25/32	2 25/32	94	43	43	2.38	1.10	1.10	LNWR 103lb

		Flatbottom Rail
Prototype				S Scale dimensions
Weight lbs/yd	Height (inches)	Width of foot (inches)	Width of head (inches)	Height (Thou) =code	Width of foot (Thou)	Width of head (Thou)	Height (mm)	Width of foot (mm)	Width of head (mm)	Type
8	19/16	19/16	25/32	24	24	12	0.62	0.62	0.31	ASCE 841 1941
9.072	1.969	1.772	0.787	31	28	12	0.78	0.70	0.31	4.5kg/m German Standard S5
12	2	2	1	31	31	16	0.79	0.79	0.40	ASCE 1240 1940
12.095	1.969	1.772	0.984	31	28	15	0.78	0.70	0.39	Hudson (Foreign)
13.607	2.559	1.969	0.984	40	31	15	1.02	0.78	0.39	6.75kg/m German Standard S7, Hudson (Foreign)
14	2 1/8	2 1/8	1 5/32	33	33	18	0.84	0.84	0.46	BS (Hudson)
14	2 1/8	2	1 1/32	33	31	16	0.84	0.79	0.41	BSM (Hudson)
14.111	2.559	1.969	0.984	40	31	15	1.02	0.78	0.39	Hudson (Foreign)
16	2 1/4	2 1/4	1 7/32	35	35	19	0.89	0.89	0.48	BS (Hudson)
16	2 5/16	2 1/16	1 3/32	36	32	17	0.92	0.82	0.43	BSM (Hudson)
16	2 3/8	2 3/8	1 11/64	37	37	18	0.94	0.94	0.47	ASCE 1640 1940
16.127	2.362	2.047	1.181	37	32	18	0.94	0.81	0.47	Hudson (Foreign)
18	2 3/8	2 3/8	1 9/32	37	37	20	0.94	0.94	0.51	BS (Hudson)
18	2 7/16	2 3/32	1 9/64	38	33	18	0.97	0.83	0.45	BSM (Hudson)
18	2 1/2	2	1 1/2	39	31	23	0.99	0.79	0.60	Penrhyn Quarry Iron 1849
18.143	2.756	2.165	1.181	43	34	18	1.09	0.86	0.47	Hudson (Foreign)
18.8	2	2 3/8	1 1/8	31	37	18	0.79	0.94	0.45	LNWR Iron 18" gauge
20	2 1/2			39	0	0	0.99	0.00	0.00	ARA
20	2 1/2	2 1/2	1 3/8	39	39	21	0.99	0.99	0.55	BS11 1905
20	2 1/2	2 1/2	1 5/8	39	39	25	0.99	0.99	0.64	BS (Hudson)
20	2 9/16	2 3/16	1 7/32	40	34	19	1.02	0.87	0.48	BSM (Hudson)
20	2 5/8	2 5/8	1 11/32	41	41	21	1.04	1.04	0.53	ASCE 2040 1940
20.159	2 1/2	2 1/2	1 3/8	39	39	21	0.99	0.99	0.55	Indian Standard 3964 ISLR 10
20.159	2.756	2.283	1.260	43	36	20	1.09	0.91	0.50	10kg/m German Standard S10, Hudson (Foreign)
22	2 9/16	2 9/32	1 5/16	40	36	21	1.02	0.91	0.52	BSM (Hudson)
24.191	2 3/4	2.362	1.406	43	37	22	1.09	0.94	0.56	Indian Standard 3964 ISLR 12
24.191	2.756	2.717	1.496	43	42	23	1.09	1.08	0.59	Hudson (Foreign - Low)
24.191	3.150	2.559	1.339	49	40	21	1.25	1.02	0.53	12kg/m German Standard S12
25	2 3/4	2 3/4	1 1/2	43	43	23	1.09	1.09	0.60	ASCE 2540/ USArmy 1918
25	2 3/4	2 3/4	1 1/2	43	43	23	1.09	1.09	0.60	BS11 1905
25	2 3/4	2 1/2	1 3/8	43	39	21	1.09	0.99	0.55	BSM (Hudson)
25	2 7/8	2 3/4	1 1/2	45	43	23	1.14	1.09	0.60	BS11 1922, Southwold Rly, BSR (Hudson)
28	2 3/4	2 47/64	1 51/64	43	43	28	1.09	1.09	0.71	BSM (Hudson)
28	3	3	1 1/2	47	47	23	1.19	1.19	0.60	Penrhyn Quarry Iron c 1877
28.223	3.150	2.756	1.496	49	43	23	1.25	1.09	0.59	14kg/m German Standard S14
30	2 1/2	3	1 1/2	39	47	23	0.99	1.19	0.60	Penrhyn Quarry Iron 1876
30	2 17/32	3 1/4	1 15/32	40	51	23	1.00	1.29	0.58	Jarrahdale Iron Rail 1879
30	2 31/32	2 3/4	1 1/2	46	43	23	1.18	1.09	0.60	BSM (Hudson)
30	3	3	1 5/8	47	47	25	1.19	1.19	0.64	BS11 1905, BS(Hudson)
30	3 1/8	3	1 5/8	49	47	25	1.24	1.19	0.64	BS11 1922
30	3 1/8	3 1/8	1 11/16	49	49	26	1.24	1.24	0.67	ASCE 3040 1940
30.239	3 1/8	3	1 5/8	49	47	25	1.24	1.19	0.65	Indian Standard 3964 ISLR 15
30.239	3.307	2.598	1.654	52	41	26	1.31	1.03	0.66	Tramways de la Sarthe
30.239	3.661	3.071	1.535	57	48	24	1.45	1.22	0.61	15kg/m German Feldbahn
35	3 1/8	3 5/32	1 21/32	49	49	26	1.24	1.25	0.66	W.A.G.R. Geraldton_Northampton 1879
35	3 3/16	3	1 11/16	50	47	26	1.27	1.19	0.67	BS248 FB-35M 17.36kg/m (BSM)
35	3 1/4	3 1/4	1 3/4	51	51	27	1.29	1.29	0.69	BS11 1905
35	3 5/16	3 5/16	1 3/4	52	52	27	1.31	1.31	0.69	ASCE 3540 1940
35	3 5/16	3 6/55	1 25/32	52	49	28	1.31	1.23	0.71	35FF
35	3 3/8	3 1/4	1 3/4	53	51	27	1.34	1.29	0.69	BS11 1922 BSR(Hudson)
36.286	3.543	3.071	1.732	55	48	27	1.41	1.22	0.69	Nantes a Liege & Tramway d'Ille-et-Vilaine
36.790	3.740	3.386	1.732	58	53	27	1.48	1.34	0.69	Tramway Vendee
36.891	3.661	3.228	1.693	57	50	26	1.45	1.28	0.67	18.3kg/m German Standard S18
39.75	3 15/32	3 11/64	1 51/64	54	50	28	1.38	1.26	0.71	Hudson
40	3 2/25	3 9/20		48	54	0	1.22	1.37	0.00	Talyllyn Iron Rail 1865
40	3 3/8	3 1/4	1 7/8	53	51	29	1.34	1.29	0.74	NZR
40	3 1/2	3 1/2	1 7/8	55	55	29	1.39	1.39	0.74	BS11 1905
40	3 1/2	3 1/2	1 7/8	55	55	29	1.39	1.39	0.74	ASCE 4040 1940
40	3 5/8	3 1/2	1 7/8	57	55	29	1.44	1.39	0.74	BS11 1922, Southwold Rly, BSR (Hudson)
40.318	3.780	3.228	1.811	59	50	28	1.50	1.28	0.72	CF Departmentaux
40.318	3.858	3.386	1.772	60	53	28	1.53	1.34	0.70	Dakar-Saint-Louis
40.318	3.937	3.228	1.732	62	50	27	1.56	1.28	0.69	20kg/m German Standard S20
40.318	3.937	3.465	1.732	62	54	27	1.56	1.38	0.69	Franco-Algerienne
41 1/4	3 1/8	3 1/8	1 3/4	49	49	27	1.24	1.24	0.69	Indian Railways standard section, NWNGR, Snowdon Mountain
41 1/2	3 3/8	3 1/4	1 7/8	53	51	29	1.34	1.29	0.74	41-1/2FF
44	3	3	1 1/2	47	47	23	1.19	1.19	0.60	Penrhyn Quarry Iron 1876
45	3 11/16	3 11/16	2	58	58	31	1.46	1.46	0.79	ASCE 4540 1940
45	3 3/4	3 3/4	1 31/32	59	59	31	1.49	1.49	0.78	BS11 1905
45	3 3/4	3 2/5	1 9/10	59	53	30	1.49	1.35	0.75	W.A.G.R. 1909
45	3 7/8	3 3/4	1 31/32	61	59	31	1.54	1.49	0.78	BS11 1922, BSR(Hudson)
46	3 3/4			59	0	0	1.49	0.00	0.00	ARA
46	3 13/16	3 15/16	2	60	62	31	1.51	1.56	0.79	Irish 3'
46.366	4.331	3.465	1.772	68	54	28	1.72	1.38	0.70	23kg/m Belgian Congo
48.382	3.937	3.701	2.323	62	58	36	1.56	1.47	0.92	24kg/m FC de la Robla
49.168	4.528	3.543	2.087	71	55	33	1.80	1.41	0.83	24.39Kg/m Prussian Form 5
49.249	4.528	3.543	2.087	71	55	33	1.80	1.41	0.83	24.43kg/m German Standard S24
50	3 7/8	3 7/8	2 1/8	61	61	33	1.54	1.54	0.84	ASCE 5040 1940
50	3 15/16	3 15/16	2 1/16	62	62	32	1.56	1.56	0.82	BS11 1905
50	4 1/8	3 15/16	2 1/16	64	62	32	1.64	1.56	0.82	BS11 1922
50.398	4 1/8	3 15/16	2 1/16	64	62	32	1.64	1.56	0.82	Indian Standard 3964 ISLR 25
52	3 63/64	3 3/4	2.086	62	59	33	1.58	1.49	0.83	ATSF 52lb
53	4 1/8	3 3/4	2 1/8	64	59	33	1.64	1.49	0.84	NZR
54.429	4.724	3.740	1.969	74	58	31	1.88	1.48	0.78	27 UNI
55	4 1/16	4 1/16	2 1/4	63	63	35	1.61	1.61	0.89	ASCE 5540 1940
55	4 1/8	4 1/8	2 5/32	64	64	34	1.64	1.64	0.86	BS11 1905
55	4 5/16	4 1/8	2 5/32	67	64	34	1.71	1.64	0.86	BS11 1922
56	4 1/16	4	2 1/4	63	63	35	1.61	1.59	0.89	NZR
56	4 6/25	3 3/4	2.180	66	59	34	1.68	1.49	0.86	ATSF 56lb
60	4 3/16	3 11/16	2 1/8	65	58	33	1.66	1.46	0.84	ARA-B 6030 1930
60	4 1/4	4 1/16	2 5/16	66	63	36	1.69	1.61	0.92	Misc 6051 1951
60	4 1/4	4 1/4	2 3/8	66	66	37	1.69	1.69	0.94	PRR 60lb, ASCE 6040 1940
60	4 5/16	4 5/16	1 13/32	67	67	22	1.71	1.71	0.56	BS11 1905
60	4 5/16	4	2 9/32	67	63	36	1.71	1.59	0.91	60 B (1896) NSW
60	4 3/8	4	2 9/32	68	63	36	1.74	1.59	0.91	60 BA (1907) NSW
60	4 1/2	4	2 1/4	70	63	35	1.79	1.59	0.89	ARA-A 6020 1920
60	4 1/2	4 1/4	2 1/2	70	66	39	1.79	1.69	0.99	A.S.16 (1916)
60	4 1/2	4 1/4	2 1/4	70	66	35	1.79	1.69	0.89	60 B1 (1890) NSW
60	4 1/2	4 5/16	2 1/4	70	67	35	1.79	1.71	0.89	BS11 1922 BS60R
60	4 5/8	4 1/4	2 1/2	72	66	39	1.84	1.69	0.99	A.S. (B.28) 1928
60.477	4.724	3.898	2.244	74	61	35	1.88	1.55	0.89	Chemin de fer de l'Est
60.477	4.921	3.819	2.205	77	60	34	1.95	1.52	0.88	CF du Nord
60.538	4.252	4.252	2.374	66	66	37	1.69	1.69	0.94	30.03Kg/m German Standard S30
61	4 5/16	4 5/16	2.331	67	67	36	1.71	1.71	0.93	ATSF 61lb
62.856	4.961	4.134	2.283	78	65	36	1.97	1.64	0.91	31.18Kg/m S 33
63.642	4.921	4.134	2.205	77	65	34	1.95	1.64	0.88	31.57 Kg/m Greek
65	4 7/16	4 7/16	2 13/32	69	69	38	1.76	1.76	0.95	ASCE 6540 1940
65	4 7/16	4 7/16	2 5/16	69	69	36	1.76	1.76	0.92	BS11 1905
65	4 5/8	4 1/2	2 13/32	72	70	38	1.84	1.79	0.95	NYC&HR 65lb
65	4 11/16	4 5/16	2 5/16	73	67	36	1.86	1.71	0.92	BS11 1922
66	4 11/32	4 9/16	2.315	68	71	36	1.72	1.81	0.92	ATSF 66lb
66.525	5.118	4.094	2.283	80	64	36	2.03	1.63	0.91	33Kg/m Wurttemberg D
67	4 17/32	4 17/32	2 3/8	71	71	37	1.80	1.80	0.94	ATSF 67lb
67.331	5.276	4.134	2.283	82	65	36	2.09	1.64	0.91	33.4Kg/m Prussian 6e
67.472	5.276	4.134	2.283	82	65	36	2.09	1.64	0.91	33.47kg/m German Standard S33
70	4 1/2	4 1/2	2 7/16	70	70	38	1.79	1.79	0.97	PRR 70lb
70	4 35/64	4 3/64	2 3/8	71	63	37	1.80	1.61	0.94	ARA-B 7030 1930
70	4 9/16	4 9/16	2 31/64	71	71	39	1.81	1.81	0.99	ATSF 70lb
70	4 5/8	4 5/8	2 3/8	72	72	37	1.84	1.84	0.94	BS11 1905
70	4 5/8	4 5/8	2 7/16	72	72	38	1.84	1.84	0.97	Illinois Central 70lb, ASCE 7040 1940
70	4 3/4	4 1/4	2 3/8	74	66	37	1.89	1.69	0.94	ARA-A 7020 1920
70	4 3/4	4 5/8	2 5/8	74	72	41	1.89	1.84	1.04	NYC&HR 70lb
70	4 7/8	4 5/8	2 3/8	76	72	37	1.93	1.84	0.94	R.B.S. (& NZR)
70	4 7/8	4 3/8	2 3/8	76	68	37	1.93	1.74	0.94	BS11 1922
70.295	5.315	4.134	2.283	83	65	36	2.11	1.64	0.91	34.87Kg/m Bavarian IX
70.936	5.118	3.937	1.969	80	62	31	2.03	1.56	0.78	35.188Kg/m 36 UNI
71	4 9/16	4 9/16	2 31/64	71	71	39	1.81	1.81	0.99	ATSF 71lb
71	4 3/4	4 3/4	2 7/16	74	74	38	1.89	1.89	0.97	Lake shore & MS 71lb
71 1/2	4 3/4	4 3/4	2 1/4	74	74	35	1.89	1.89	0.89	71 1/2D (1875) NSW
72	4 7/8	4 5/8	2 3/8	76	72	37	1.93	1.84	0.94	NZR
72.089	4.921	4.331	2.283	77	68	36	1.95	1.72	0.91	35E1, Xa
72.673	5.118	4.134	2.283	80	65	36	2.03	1.64	0.91	36.05Kg/m Saxony Va
72.976	5.079	4.134	2.362	79	65	37	2.02	1.64	0.94	36.2Kg/m Baden 129
73.665	5.039	4.528	2.226	79	71	35	2.00	1.80	0.88	36.542 Kg/m S 40
73.762	5.039	4.528	2.294	79	71	36	2.00	1.80	0.91	36E2, 36kg (S-40)
75	4 5/8	4 5/8	2 39/64	72	72	41	1.84	1.84	1.04	C&O 75lb
75	4 3/4	4 3/4	2 9/16	74	74	40	1.89	1.89	1.02	Mo. Pac. 7550 1950
75	4 13/16	4 13/16	2 7/16	75	75	38	1.91	1.91	0.97	BS11 1905
75	4 13/16	4 13/16	2 1/4	75	75	35	1.91	1.91	0.89	BHP 75lb for RoD 1916
75	4 13/16	4 13/16	2 15/32	75	75	39	1.91	1.91	0.98	CB&Q 75lb, Illinois Central 75lb, ASCE 7540 1940
75	4 55/64	4 47/64	4 17/32	76	74	71	1.93	1.88	1.80	Victorian Railways 75lb
75	4 15/16	4 15/16	2 7/16	77	77	38	1.96	1.96	0.97	S. Pac. 7524 1924
75	5	4 3/4	2 5/8	78	74	41	1.98	1.89	1.04	NYC&HR 75lb
75	5 1/16	4 1/2	2 7/16	79	70	38	2.01	1.79	0.97	BS11 1922
75.072	5.276	4.134	2.283	82	65	36	2.09	1.64	0.91	37.24Kg/m Prussian 7e
76.604	4.921	4.134	2.441	77	65	38	1.95	1.64	0.97	Belgian pre 1899
78	4 13/16	5	2 3/4	75	78	43	1.91	1.98	1.09	78H (1903) NSW
78.217	5.118	5.118	2.362	80	80	37	2.03	2.03	0.94	PLM
79	4 3/4	5	2 1/2	74	78	39	1.89	1.98	0.99	GNRI 79lb
80	4 9/16	5	2 3/8	71	78	37	1.81	1.98	0.94	Great Southern & Western 74lb
80	4 29/32	5	2 1/2	77	78	39	1.95	1.98	0.99	80A3 (1875) NSW
80	4 15/16	4 7/16	2 7/16	77	69	38	1.96	1.76	0.97	ARA-B 8030 1930
80	4 15/16	5	2 1/2	77	78	39	1.96	1.98	0.99	80A1 (1897) NSW
80	4.961	4.449	2.343	78	70	37	1.97	1.77	0.93	Belgium - American post 1918 rail
80	5	5	2 1/2	78	78	39	1.98	1.98	0.99	BS11 1905
80	5	5	2 1/2	78	78	39	1.98	1.98	0.99	ASCE 8040 1940
80	5	5	2 35/64	78	78	40	1.98	1.98	1.01	S Aust 80lb
80	5	5	2 1/2	78	78	39	1.98	1.98	0.99	NSWGR 80lb
80	5 1/16	5	2 1/2	79	78	39	2.01	1.98	0.99	80AA (1907) NSW
80	5 1/8	4 5/8	2 1/2	80	72	39	2.03	1.84	0.99	ARA-A 8020 1920
80	5 1/8	5	2 21/32	80	78	42	2.03	1.98	1.05	NYC&HR 80lb, Dudley 8022 1922
80	5 15/64	5 3/64	2 25/32	82	79	43	2.08	2.00	1.10	Victorian Railways 80lb
80	5 1/4	4 5/8	2 1/2	82	72	39	2.08	1.84	0.99	BS11 1922
80	5 1/4	5	2 3/4	82	78	43	2.08	1.98	1.09	A.S.16 (1916)
80	5 3/8	5	2 1/2	84	78	39	2.13	1.98	0.99	A.S. (B.28) 1928
80.152	5.118	4.724	2.441	80	74	38	2.03	1.88	0.97	BCK 40, 40KDL
80.173	5 1/4	4 5/8	2 1/2	82	72	39	2.08	1.84	0.99	30E1, BS 80A
80.374	5	5	2 1/2	78	78	39	1.98	1.98	0.99	80 ASCE
80.636	5.461	4.016	2.362	85	63	37	2.17	1.59	0.94	Dutch state
81.947	5.118	4.134	2.441	80	65	38	2.03	1.64	0.97	Belgian 1899
82	5 3/8	5	2 1/2	84	78	39	2.13	1.98	0.99	A.S.37 (1937)
82.451	5.512	4.921	2.323	86	77	36	2.19	1.95	0.92	40.9kg/m German Standard R41
82.471	5.433	4.921	2.244	85	77	35	2.16	1.95	0.89	40.91kg/m German Standard S41U
82.551	5.433	4.921	2.638	85	77	41	2.16	1.95	1.05	40.95kg/m German Standard S41, 40E1
83	5	5	2 37/64	78	78	40	1.98	1.98	1.02	Great Southern & Western 83lb
83.136	5.433	4.921	2.638	85	77	41	2.16	1.95	1.05	41E1, S41 R10
83.418	5.433	4.331	2.835	85	68	44	2.16	1.72	1.13	41.38Kg/m Prussian 8d
83.418	5.433	4.921	2.244	85	77	35	2.16	1.95	0.89	41.38kg/m German Standard S41A
85	5	5	2 9/16	78	78	40	1.98	1.98	1.02	PRR 8533 1933
85	5 1/8	4 5/8	2 1/2	80	72	39	2.03	1.84	0.99	PS 8531 1931
85	5 1/8	5	2 1/2	80	78	39	2.03	1.98	0.99	Can Pac. 8524 1924
85	5 3/16	5 3/16	2 9/16	81	81	40	2.06	2.06	1.02	BS11 1905
85	5 3/16	5 3/16	2 21/32	81	81	42	2.06	2.06	1.05	CB&Q 8543 1943
85	5 3/16	5 3/16	2 9/16	81	81	40	2.06	2.06	1.02	ASCE 8540 1940
85	5 7/32	5 1/4	2 15/32	82	82	39	2.07	2.08	0.98	Mo. Pac. 8550 1950
85	5 3/8	4 7/8	2 1/2	84	76	39	2.13	1.93	0.99	Soo Line 8520 1920
85	5 7/16	5 3/16	2 9/16	85	81	40	2.16	2.06	1.02	R.B.S. (& NZR)
85	5 7/16	4 13/16	2 9/16	85	75	40	2.16	1.91	1.02	BS11 1922
85.071	5 3/16	5 3/16	2 9/16	81	81	40	2.06	2.06	1.02	85 ASCE
87.692	5.512	4.921	2.559	86	77	40	2.19	1.95	1.02	43.5Kg/m Bavarian X, Wurttemberg E
88.297	5.512	4.921	2.559	86	77	40	2.19	1.95	1.02	43.8Kg/m Baden 140
88.700	5.551	5.118	2.362	87	80	37	2.20	2.03	0.94	Chemin de fer de l'Est
89.668	5 5/8	5 1/8	2.473	88	80	39	2.23	2.03	0.98	90 RAA
89.869	5 5/8	5 3/8	2 5/8	88	84	41	2.23	2.13	1.04	BS 90R
89.909	5.512	4.488	2.756	86	70	43	2.19	1.78	1.09	43 CHINE
90	5	5	2 7/8	78	78	45	1.98	1.98	1.14	INTRBGH 9050 1950
90	5 17/64	4 49/64	2 9/16	82	74	40	2.09	1.89	1.02	ARA-B 9030 1930
90	5 3/8	5 3/8	2 5/8	84	84	41	2.13	2.13	1.04	ASCE 9040 1940
90	5 3/8	5	2 5/8	84	78	41	2.13	1.98	1.04	Grt. No. 9024 1924
90	5 3/8	5 3/8	2 5/8	84	84	41	2.13	2.13	1.04	BS11 1905
90	5 1/2	5 3/8	2 3/4	86	84	43	2.18	2.13	1.09	90J (1913) NSW
90	5 1/2	5	2 21/32	86	78	42	2.18	1.98	1.05	Dudley
90	5 1/2	5 1/8	2 9/16	86	80	40	2.18	2.03	1.02	D&RG
90	5 17/32	5 3/32	2 1/2	86	80	39	2.20	2.02	0.99	C&NW 9035 1935
90	5 9/16	5	2 3/4	87	78	43	2.21	1.98	1.09	A.S.25 (1925)
90	5 5/8	5 3/16	2 9/16	88	81	40	2.23	2.06	1.02	AT&SF 9021 1921
90	5 5/8	5 1/8	2 9/16	88	80	40	2.23	2.03	1.02	ARA-A 9020 1920
90	5 5/8	5 3/8	2 7/8	88	84	45	2.23	2.13	1.14	A.S.16 (1916)
90	5 5/8	5	2 5/8	88	78	41	2.23	1.98	1.04	BS11 1922
90	5 3/4	5 3/8	2 3/4	90	84	43	2.28	2.13	1.09	U. Pac. 9023 1923
90.292	5.591	5.118	2.598	87	80	41	2.22	2.03	1.03	RN 45 UNE25122
90.534	5 5/8	5	2 29/45	88	78	41	2.23	1.98	1.05	BS 90 AM
90.817	5.669	4.331	2.835	89	68	44	2.25	1.72	1.13	45.05Kg/m Prussian 15c
90.938	5 5/8	5	2 5/8	88	78	41	2.23	1.98	1.04	45E1, BS 90A
90.968	5.669	5.354	2.362	89	84	37	2.25	2.13	0.94	CF du Nord
91	5 5/8	5 3/16	2 9/16	88	81	40	2.23	2.06	1.02	NZR
91.220	5.591	4.921	2.638	87	77	41	2.22	1.95	1.05	45.25 kg/m German Standard S45
91 1/4	4 7/8	5 3/4	2 5/8	76	90	41	1.93	2.28	1.04	MR/LMS ashpit rail
91.327	5.827	5.276	1.991	91	82	31	2.31	2.09	0.79	45.303 Kg/m U33
91.623	5.551	4.961	2.673	87	78	42	2.20	1.97	1.06	Danish 45.45Kg/m (DSB45)
91.744	5.551	4.961	2.728	87	78	43	2.20	1.97	1.08	45E2, DSB 45
92.298	5.709	5.315	2.106	89	83	33	2.27	2.11	0.84	45.785 Kg/m 46 UNI
93.074	5.709	4.921	2.559	89	77	40	2.27	1.95	1.02	46E1, SBB I
93.276	5.709	5.276	2.441	89	82	38	2.27	2.09	0.97	46E2, U33
93.336	5.787	5.118	2.598	90	80	41	2.30	2.03	1.03	46.3Kg/m Saxony VI
94	5 9/16	5	2 3/4	87	78	43	2.21	1.98	1.09	A.S.37 (1937)
94.062	5.591	4.724	2.902	87	74	45	2.22	1.88	1.15	46E3, NP 46
95	5 9/16	5 9/16	2 11/16	87	87	42	2.21	2.21	1.07	BS11 1905
95	5 9/16	5 9/16	2 11/16	87	87	42	2.21	2.21	1.07	ASCE 9540 1940
95	5 13/16	5 1/8	2 3/4	91	80	43	2.31	2.03	1.09	BS11 1922
95.272	5 13/16	5 1/2	2 3/4	91	86	43	2.31	2.18	1.09	BS 95 N
95.554	5.591	5.118	2.598	87	80	41	2.22	2.03	1.03	PLM
96.905	5.906	2.677	5.000	92	42	78	2.34	1.06	1.98	SAR 48
98	5 5/8	5 1/2	2 3/4	88	86	43	2.23	2.18	1.09	FB-98 B.R. 1950s
98.880	5.827	4.921	2.567	91	77	40	2.31	1.95	1.02	49.05 Kg/m S49A
98.921	5.827	4.921	2.638	91	77	41	2.31	1.95	1.05	49.07 kg/m German Standard S49
99.042	5.866	4.921	2.638	92	77	41	2.33	1.95	1.05	49E5 DBS 918 254-1
99.566	5.866	4.921	2.638	92	77	41	2.33	1.95	1.05	49E1, DIN S49
99.646	5.866	4.921	2.575	92	77	40	2.33	1.95	1.02	49.43 kg/m German Standard S49
100	5 1/2	5 1/2	2 13/16	86	86	44	2.18	2.18	1.12	PRR 10033 1933
100	5 5/8	5 3/8	2 21/32	88	84	42	2.23	2.13	1.05	Reading 10032 1932
100	5 41/64	5 9/64	2 21/32	88	80	42	2.24	2.04	1.05	ARA-B 10030 1930
100	5 11/16	5	2 43/64	89	78	42	2.26	1.98	1.06	PS 10031 1931
100	5 45/64	5 9/64	2 9/16	89	80	40	2.26	2.04	1.02	C&NW 10035 1935
100	5 3/4	5 3/4	2 3/4	90	90	43	2.28	2.28	1.09	100C (1901) NSW
100	5 3/4	5 3/4	2 7/8	90	90	45	2.28	2.28	1.14	INTRBGH 10005 1905
100	5 3/4	5 3/4	2 3/4	90	90	43	2.28	2.28	1.09	ASCE 10040 1940
100	5 3/4	5 3/4	2 3/4	90	90	43	2.28	2.28	1.09	BS11 1905
100	5 3/4	5	2 3/4	90	78	43	2.28	1.98	1.09	Grt. No.10036 1936
100	5 13/16	5 3/4	2 3/4	91	90	43	2.31	2.28	1.09	100CA (1907) NSW
100	6	5 3/8	2 11/16	94	84	42	2.38	2.13	1.07	AREA 10025 1925
100	6	5 1/2	2 3/4	94	86	43	2.38	2.18	1.09	ARA-A 10020 1920, NYNH&H 10034 1934
100	6	5 1/4	2 3/4	94	82	43	2.38	2.08	1.09	BS11 1922
100	6	5	2 3/4	94	78	43	2.38	1.98	1.09	100FF
100	6	5 3/8	2 11/16	94	84	42	2.38	2.13	1.07	AREA 10025 1925
100	6	5 3/4	3	94	90	47	2.38	2.28	1.19	A.S.16 (1916)
100	6	5 3/4	2 3/4	94	90	43	2.38	2.28	1.09	R.B.S. (& NZR)
100	6	5 1/2	3	94	86	47	2.38	2.18	1.19	NYC&HR 100lb
100	6	5 11/16	3	94	89	47	2.38	2.26	1.19	Victorian Railways 100lb
100	6 9/64	5 3/4	2 3/4	96	90	43	2.44	2.28	1.09	A.S.28
100.493	5.827	5.315	2.173	91	83	34	2.31	2.11	0.86	49.85 Kg/m 50 UNI
100.594	5.827	5.315	2.638	91	83	41	2.31	2.11	1.05	50E5, 50 UNI
100.735	5.945	5.512	2.835	93	86	44	2.36	2.19	1.13	50E2, 50EB-T
100.795	5.906	5.512	2.835	92	86	44	2.34	2.19	1.13	Belgian
100.795	5.945	5.512	2.835	93	86	44	2.36	2.19	1.13	Belgian Modified profile
100.836	6.102	5.236	2.756	95	82	43	2.42	2.08	1.09	50E3, BV 50
101	5 7/16	5 3/8	2 3/4	85	84	43	2.16	2.13	1.09	DL&W 10133 1933
101	6.024	5.197	2.598	94	81	41	2.39	2.06	1.03	NZR 50 Kg/m
101.158	6.000	5.248	2.748	94	82	43	2.38	2.08	1.09	BS 100 A (BS 11)
101.501	6	5 3/8	2 11/16	94	84	42	2.38	2.13	1.07	AREMA 100RE
101.541	6.024	5.276	2.559	94	82	40	2.39	2.09	1.02	50E1, U50E
102	5.512	5.303	2.807	86	83	44	2.19	2.10	1.11	PRR
102.071	6.024	5.512	2.559	94	86	40	2.39	2.19	1.02	50.633 Kg/m U 50
102.509	6 1/16	5 3/8	2.583	95	84	40	2.41	2.13	1.03	AREMA 100CP-RE
102.610	6.024	5.512	2.559	94	86	40	2.39	2.19	1.02	50E6, U 50
103	6 9/64	5 3/4	2 3/4	96	90	43	2.44	2.28	1.09	A.S.36 (1936)
103.819	5.984	5.197	2.756	94	81	43	2.38	2.06	1.09	50 CHINE
103.819	5.984	5.197	2.756	94	81	43	2.38	2.06	1.09	Russian R50 (P50)
104.303	6.141	5.359	2.641	96	84	41	2.44	2.13	1.05	IRS 52
104.827	5.709	5.315	2.835	89	83	44	2.27	2.11	1.13	Belgian 1886
104.827	6.142	5.906	2.835	96	92	44	2.44	2.34	1.13	IRS 52Kg
105	6	5 3/8	2 3/4	94	84	43	2.38	2.13	1.09	DL&W 10533 1933
105	6	5 1/2	3	94	86	47	2.38	2.18	1.19	Dudley 10524 1924
105	6 1/8	5 3/8	2 3/4	96	84	43	2.43	2.13	1.09	BS11 1922
105	6.141	5 3/8	2.641	96	84	41	2.44	2.13	1.05	105FF
105.130	5.906	5.906	2.559	92	92	40	2.34	2.34	1.02	52E1, 52 RATP
107	6 3/16	5 3/4	2 3/4	97	90	43	2.46	2.28	1.09	A.S.36 (1936)
108.496	6.339	4.921	2.638	99	77	41	2.52	1.95	1.05	54E2, UIC 54 E
108.859	6.260	5.512	2.756	98	86	43	2.48	2.19	1.09	UIC 54 Kg/m
108.859	6.339	4.921	2.638	99	77	41	2.52	1.95	1.05	UIC 54E 54Kg/m
109	6 1/4	5 1/2	2 3/4	98	86	43	2.48	2.18	1.09	FB-109 B.R. 1950s
109.484	6.063	4.921	2.638	95	77	41	2.41	1.95	1.05	54E4
109.706	6.260	5.512	2.764	98	86	43	2.48	2.19	1.10	54E5, 54E1HC
109.948	6.063	4.921	2.638	95	77	41	2.41	1.95	1.05	54.54kg/m German Standard S54
110	6	5 1/2	2 7/8	94	86	45	2.38	2.18	1.14	Le. Val. 11033 1933
110	6 1/8	6 1/8	2 7/8	96	96	45	2.43	2.43	1.14	ASCE 11040 1940
110	6 1/4	5 1/2	2 25/32	98	86	43	2.48	2.18	1.10	AREA 11025 1925
110	6 1/4	5 1/2	2 3/4	98	86	43	2.48	2.18	1.09	BS11 1922
110	6 1/2	5 1/2	2 3/4	102	86	43	2.58	2.18	1.09	Gr. No 11036 1936
110.008	6.063	4.921	2.638	95	77	41	2.41	1.95	1.05	54E3, DIN S54
110.411	6.260	5.512	2.756	98	86	43	2.48	2.19	1.09	54E1, UIC 54
112	6 5/8	5 1/2	2 23/32	104	86	42	2.63	2.18	1.08	AREA 11228 1928
112	6 3/4	5 1/2	2 1/2	105	86	39	2.68	2.18	0.99	TR. 11229 1929
112.951	6.102	5.276	2.441	95	82	38	2.42	2.09	0.97	55E1, U55
113	6 1/4	5 1/2	2 3/4	98	86	43	2.48	2.18	1.09	BS11 1922
113	6 13/16	5 1/2	2 11/16	106	86	42	2.70	2.18	1.07	So. Pac.
113.496	6 1/4	5.512	2 3/4	98	86	43	2.48	2.19	1.09	56E1, BS113Ib
114.544	6 5/8	5 1/2	2.679	104	86	42	2.63	2.18	1.06	AREMA 115RE
114.866	6 5/8	5 1/2	2.677	104	86	42	2.63	2.18	1.06	AREMA 115RE 10
114.907	6.299	5.315	3.150	98	83	49	2.50	2.11	1.25	Belgian 1907
115	6 3/8	6 1/8	2 15/16	100	96	46	2.53	2.43	1.17	115 FF
115	6 1/2	5 1/2	3	102	86	47	2.58	2.18	1.19	Dudley 11522 1922
115	6 5/8	5 1/2	2 23/32	104	86	42	2.63	2.18	1.08	AREA 11525 1925
115.794	6.496	5.512	2.807	102	86	44	2.58	2.19	1.11	SAR 57
118.697	6 13/16	5 1/2	2 21/32	106	86	42	2.70	2.18	1.05	AREMA 119RE
119	6 13/16	5 1/2	2 21/32	106	86	42	2.70	2.18	1.05	AREA 11937 1937
120.954	6.772	5.354	2.638	106	84	41	2.69	2.12	1.05	IRS 60Kg
121.015	6.772	5.906	2.835	106	92	44	2.69	2.34	1.13	60E2
121.378	6.772	5.906	2.835	106	92	44	2.69	2.34	1.13	60E1, UIC 60
122.245	6.693	5.748	2.756	105	90	43	2.66	2.28	1.09	AS 60
122.446	6.781	6.000	2.856	106	94	45	2.69	2.38	1.13	122 CB
122.567	6.929	5.906	2.787	108	92	44	2.75	2.34	1.11	60 CHINE
123.757	6.875	5.500	2.893	107	86	45	2.73	2.18	1.15	124 JK
127	7	6 1/4	3	109	98	47	2.78	2.48	1.19	Dudley 12723 1923
130	6 5/8	5 1/2	3	104	86	47	2.63	2.18	1.19	PS 13031 1931
130	6 3/4	6	2 15/16	105	94	46	2.68	2.38	1.17	130 FF
130	6 3/4	6	2 15/16	105	94	46	2.68	2.38	1.17	AREA 13025 1925
130.772	7.087	5.906	2.874	111	92	45	2.81	2.34	1.14	Russian R 65
130.832	6.772	5.906	2.992	106	92	47	2.69	2.34	1.19	64.9kg/m German Standard S64
131	7 1/8	6	3	111	94	47	2.83	2.38	1.19	AREA 13128 1928
131.820	7 1/8	6	2.959	111	94	46	2.83	2.38	1.17	AREMA 132RE
132	7.094	5 7/8	2 15/16	111	92	46	2.82	2.33	1.17	132 FF
132	7 1/8	6	3	111	94	47	2.83	2.38	1.19	AREA 13228 1928
133	7 1/16	6	3	110	94	47	2.80	2.38	1.19	AREA 13331 1931
133.433	7 1/16	6	2 7/8	110	94	45	2.80	2.38	1.14	AREMA 133RE
135.408	7 5/16	6	2.914	114	94	46	2.90	2.38	1.16	AREMA 136OP
135.791	7 5/16	6	2.937	114	94	46	2.90	2.38	1.17	AREMA 136RE10
136	7	6 1/2	2 15/16	109	102	46	2.78	2.58	1.17	Le. Val. 13633 1933
136	7 5/16	6	2 15/16	114	94	46	2.90	2.38	1.17	AREA 13622, 13637 1922 1937
136.054	7 5/16	6	2.903	114	94	45	2.90	2.38	1.15	AREMA 136RE, 136.1
136.074	7.311	6	2.929	114	94	46	2.90	2.38	1.16	D1 (AS68)
136.316	7 11/32	6	2.903	115	94	45	2.91	2.38	1.15	AREMA 136CN04
136.598	7 5/16	6	2.902	114	94	45	2.90	2.38	1.15	AREMA 136RE14
140	7 5/16	6	3	114	94	47	2.90	2.38	1.19	AREA
140	7 5/16	6	3	114	94	47	2.90	2.38	1.19	PS 14031 1931
140.872	7.437	6	2.926	116	94	46	2.95	2.38	1.16	AREMA 141RE, 141AB
141	7 7/16	6	2 29/32	116	94	45	2.95	2.38	1.15	141 RE
152	8	6 3/4	3	125	105	47	3.18	2.68	1.19	PS 15222 1922
155	8	6 3/4	3	125	105	47	3.18	2.68	1.19	PS 15531 1931