How to Calculate ‘C’ Section Beam Surface Area for Your Project

When selecting and preparing ‘C’ section beams for your project, understanding the surface area per foot of length and per ton of weight is crucial. Below is a detailed chart for various ‘C’ section beams, including calculations for surface area with or without one flange side.

Section Designation		Square Feet of Surface Area per Foot of Length		Square Feet of Surface Area per Ton
		Minus one flange side	All around	Minus one flange side	All around
C-15	x 50	3.44	3.75	137.6	150.0
	x 40	3.38	3.67	169.0	183.5
	x 33.9	3.34	3.63	197.1	214.2
C-12	x 30	2.78	3.04	185.3	202.7
	x 25	2.75	3.00	220.0	240.0
	x 20.7	2.75	3.00	265.7	289.9
C-10	x 30	2.42	2.67	161.3	178.0
	x 25	2.39	2.63	191.2	210.4
	x 20	2.35	2.58	235.0	258.0
	x 15.3	2.32	2.54	305.3	334.2
C-9	x 20	2.16	2.38	216.0	238.0
	x 15	2.13	2.33	284.0	310.7
	x 13.4	2.09	2.29	311.9	341.8
C-8	x 18.75	1.96	2.17	209.1	231.5
	x 13.75	1.93	2.13	280.7	309.8
	x 11.5	1.90	2.08	330.4	361.7
C-7	x 14.75	1.73	1.92	234.6	260.3
	x 12.25	1.73	1.92	282.4	313.5
	x 9.8	1.70	1.88	346.9	383.7
C-6	x 13	1.53	1.71	235.4	263.1
	x 10.5	1.50	1.67	285.7	318.1
	x 8.2	1.47	1.63	358.5	397.6
C-5	x 9	1.30	1.46	288.9	324.4
	x 6.7	1.27	1.42	379.1	423.9
C-4	x 7.25	1.10	1.25	295.2	344.8
	x 5.4	1.07	1.21	396.3	448.1
C-3	x 6	0.91	1.04	303.3	346.7
	x 5	0.88	1.00	352.0	400.0
	x 4.1	0.84	0.96	409.8	468.3
MC-18	x 58	4.06	4.42	140.0	152.4
	x 51.9	4.03	4.38	155.3	168.8
	x 45.8	4.00	4.33	176.7	189.1
	x 42.7	4.00	4.33	187.4	202.8
MC-13	x 50	3.26	3.63	130.4	145.2
	x 40	3.20	3.54	160.0	177.0
	x 35	3.20	3.54	182.9	202.3
	x 31.8	3.17	3.50	199.4	220.1
MC-12	x 50	3.03	3.38	121.2	135.2
	x 45	3.00	3.33	133.3	148.0
	x 40	2.97	3.29	148.5	164.5
	x 35	2.94	3.25	168.0	185.7
	x 37	2.91	3.21	157.3	173.5
	x 32.9	2.88	3.17	175.1	192.7
	x 30.9	2.88	3.17	186.4	205.2
MC-10	x 41.1	2.76	3.13	134.3	152.3
	x 33.6	2.70	30.4	160.7	181.0
	x 28.5	2.67	3.00	187.4	210.5
	x 28.3	2.54	2.83	179.5	200.0
	x 25.3	2.54	2.83	200.8	223.7
	x 24.9	2.51	2.79	201.6	224.1
	x 21.9	2.54	2.83	232.0	258.4
MC-9	x 25.4	2.38	2.67	187.4	210.2
	x 23.9	2.38	2.67	199.2	223.4
MC-8	x 22.8	2.21	2.50	193.9	219.3
	x 21.4	2.21	2.50	206.5	233.6
	x 20	2.08	2.33	208.0	233.0
	x 18.7	2.08	2.33	222.5	249.2
MC-7	x 22.7	2.07	2.38	182.4	209.7
	x 19.1	2.04	2.33	213.6	244.0
	x 17.6	1.92	2.17	218.2	246.6
MC-6	x 18	1.88	2.17	208.9	241.1
	x 15.3	1.88	2.17	245.8	283.7
	x 16.3	1.75	2.00	214.7	245.4
	x 15.1	1.75	2.00	231.8	264.9
	x 12	1.63	1.83	271.7	305.0
MC-3	x 9	1.03	1.21	228.9	268.9
	x 7.1	1.00	1.17	281.7	329.6

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