Steel section tables · 07 / 08

Rectangular Hollow Section (RHS) Sizes

Rectangular hollow sections (RHS) are rectangular tubes. They are used for beams, frames, lintels, stair stringers and posts. Sizes are written depth × width × wall thickness. This table covers hot-finished sections.

161 sizes · 50 × 30 × 3.2 to 500 × 300 × 17.5 · BS EN 10210-2 (hot-finished)

Fig. 07 · RHSNot to scale

Symbols

Symbol key

Mass: Mass per metre; kg/m
h: Outside depth (the larger side); mm
b: Outside width; mm
t: Thickness; mm
A: Area of section; cm²
I_x: Second moment of area, major axis x–x; cm⁴
I_y: Second moment of area, minor axis y–y; cm⁴
W_el,x: Elastic section modulus, major axis x–x; cm³
W_el,y: Elastic section modulus, minor axis y–y; cm³

Table

Rectangular hollow sections table

Select a column heading to sort. Every row links: add its ID to the address, for example #rhs-200x150x10.

Popular sizes

100 × 50 × 5.0 10.8 kg/m
150 × 100 × 6.3 23.1 kg/m
200 × 100 × 8.0 35.1 kg/m
250 × 150 × 10.0 58.8 kg/m
300 × 200 × 10.0 74.5 kg/m

Rectangular hollow sections (RHS): dimensions and properties, 161 sizes. Values are nominal.
Designationserial size	Masskg/m	hmm	bmm	tmm	Acm²	I_xcm⁴	I_ycm⁴	W_el,xcm³	W_el,ycm³
50 × 30 × 3.2	3.61	50	30	3.2	4.6	14.2	6.2	5.68	4.13
50 × 30 × 3.6	4.01	50	30	3.6	5.1	15.4	6.67	6.16	4.45
50 × 30 × 4.0	4.39	50	30	4.0	5.59	16.5	7.08	6.6	4.72
50 × 30 × 5.0	5.28	50	30	5.0	6.73	18.7	7.89	7.49	5.26
50 × 30 × 6.3	6.33	50	30	6.3	8.07	20.6	8.5	8.26	5.66
60 × 40 × 3.2	4.62	60	40	3.2	5.88	27.8	14.6	9.27	7.29
60 × 40 × 3.6	5.14	60	40	3.6	6.54	30.4	15.9	10.1	7.93
60 × 40 × 4.0	5.64	60	40	4.0	7.19	32.8	17	10.9	8.52
60 × 40 × 5.0	6.85	60	40	5.0	8.73	38.1	19.5	12.7	9.77
60 × 40 × 6.3	8.31	60	40	6.3	10.6	43.4	21.9	14.5	11
60 × 40 × 8.0	10.0	60	40	8.0	12.8	47.9	23.7	16	11.9
80 × 40 × 3.2	5.62	80	40	3.2	7.16	57.2	18.9	14.3	9.46
80 × 40 × 3.6	6.27	80	40	3.6	7.98	62.8	20.6	15.7	10.3
80 × 40 × 4.0	6.90	80	40	4.0	8.79	68.2	22.2	17.1	11.1
80 × 40 × 5.0	8.42	80	40	5.0	10.7	80.3	25.7	20.1	12.9
80 × 40 × 6.3	10.3	80	40	6.3	13.1	93.3	29.2	23.3	14.6
80 × 40 × 8.0	12.5	80	40	8.0	16	106	32.1	26.5	16.1
90 × 50 × 3.2	6.63	90	50	3.2	8.44	89.1	35.3	19.8	14.1
90 × 50 × 3.6	7.40	90	50	3.6	9.42	98.3	38.7	21.8	15.5
90 × 50 × 4.0	8.15	90	50	4.0	10.4	107	41.9	23.8	16.8
90 × 50 × 5.0	9.99	90	50	5.0	12.7	127	49.2	28.3	19.7
90 × 50 × 6.3	12.3	90	50	6.3	15.6	150	57	33.3	22.8
90 × 50 × 8.0	15.0	90	50	8.0	19.2	174	64.6	38.6	25.8
90 × 50 × 10.0	18.0	90	50	10.0	22.9	194	70.2	43	28.1
100 × 50 × 3.2	7.13	100	50	3.2	9.08	116	38.8	23.2	15.5
100 × 50 × 3.6	7.96	100	50	3.6	10.1	128	42.6	25.6	17
100 × 50 × 4.0	8.78	100	50	4.0	11.2	140	46.2	27.9	18.5
100 × 50 × 5.0	10.8	100	50	5.0	13.7	167	54.3	33.3	21.7
100 × 50 × 6.3	13.3	100	50	6.3	16.9	197	63	39.4	25.2
100 × 50 × 8.0	16.3	100	50	8.0	20.8	230	71.7	46	28.7
100 × 50 × 10.0	19.6	100	50	10.0	24.9	259	78.4	51.8	31.4
100 × 60 × 3.2	7.63	100	60	3.2	9.72	131	58.8	26.2	19.6
100 × 60 × 3.6	8.53	100	60	3.6	10.9	145	64.8	28.9	21.6
100 × 60 × 4.0	9.41	100	60	4.0	12	158	70.5	31.6	23.5
100 × 60 × 5.0	11.6	100	60	5.0	14.7	189	83.6	37.8	27.9
100 × 60 × 6.3	14.2	100	60	6.3	18.1	225	98.1	45	32.7
100 × 60 × 8.0	17.5	100	60	8.0	22.4	264	113	52.8	37.8
100 × 60 × 10.0	21.1	100	60	10.0	26.9	299	126	59.9	42.1
120 × 60 × 3.6	9.66	120	60	3.6	12.3	227	76.3	37.9	25.4
120 × 60 × 4.0	10.7	120	60	4.0	13.6	249	83.1	41.5	27.7
120 × 60 × 5.0	13.1	120	60	5.0	16.7	299	98.8	49.9	32.9
120 × 60 × 6.3	16.2	120	60	6.3	20.7	358	116	59.7	38.8
120 × 60 × 8.0	20.1	120	60	8.0	25.6	425	135	70.8	45
120 × 60 × 10.0	24.3	120	60	10.0	30.9	488	152	81.4	50.5
120 × 80 × 3.6	10.8	120	80	3.6	13.7	276	147	46	36.7
120 × 80 × 4.0	11.9	120	80	4.0	15.2	303	161	50.4	40.2
120 × 80 × 5.0	14.7	120	80	5.0	18.7	365	193	60.9	48.2
120 × 80 × 6.3	18.2	120	80	6.3	23.2	440	230	73.3	57.6
120 × 80 × 8.0	22.6	120	80	8.0	28.8	525	273	87.5	68.1
120 × 80 × 10.0	27.4	120	80	10.0	34.9	609	313	102	78.1
150 × 100 × 4.0	15.1	150	100	4.0	19.2	607	324	81	64.8
150 × 100 × 5.0	18.6	150	100	5.0	23.7	739	392	98.5	78.5
150 × 100 × 6.3	23.1	150	100	6.3	29.5	898	474	120	94.8
150 × 100 × 8.0	28.9	150	100	8.0	36.8	1,090	569	145	114
150 × 100 × 10.0	35.3	150	100	10.0	44.9	1,280	665	171	133
150 × 100 × 12.5	42.8	150	100	12.5	54.6	1,490	763	198	153
160 × 80 × 4.0	14.4	160	80	4.0	18.4	612	207	76.5	51.7
160 × 80 × 5.0	17.8	160	80	5.0	22.7	744	249	93	62.3
160 × 80 × 6.3	22.2	160	80	6.3	28.2	903	299	113	74.8
160 × 80 × 8.0	27.6	160	80	8.0	35.2	1,090	356	136	89
160 × 80 × 10.0	33.7	160	80	10.0	42.9	1,280	411	161	103
160 × 80 × 12.5	40.9	160	80	12.5	52.1	1,480	465	186	116
200 × 100 × 4.0	18.2	200	100	4.0	23.2	1,220	416	122	83.2
200 × 100 × 5.0	22.6	200	100	5.0	28.7	1,500	505	149	101
200 × 100 × 6.3	28.1	200	100	6.3	35.8	1,830	613	183	123
200 × 100 × 8.0	35.1	200	100	8.0	44.8	2,230	739	223	148
200 × 100 × 10.0	43.1	200	100	10.0	54.9	2,660	869	266	174
200 × 100 × 12.5	52.7	200	100	12.5	67.1	3,140	1,000	314	201
200 × 100 × 14.2	58.9	200	100	14.2	75	3,420	1,080	342	216
200 × 100 × 16.0	65.2	200	100	16.0	83	3,680	1,150	368	229
200 × 120 × 5.0	24.1	200	120	5.0	30.7	1,680	762	168	127
200 × 120 × 6.3	30.1	200	120	6.3	38.3	2,060	929	207	155
200 × 120 × 8.0	37.6	200	120	8.0	48	2,530	1,130	253	188
200 × 120 × 10.0	46.3	200	120	10.0	58.9	3,030	1,340	303	223
200 × 120 × 12.5	56.6	200	120	12.5	72.1	3,580	1,560	358	260
200 × 120 × 14.2	63.3	200	120	14.2	80.7	3,910	1,690	391	282
200 × 120 × 16.0	70.2	200	120	16.0	89.4	4,220	1,810	422	302
200 × 150 × 5.0	26.5	200	150	5.0	33.7	1,970	1,260	197	169
200 × 150 × 6.3	33.0	200	150	6.3	42.1	2,420	1,550	242	207
200 × 150 × 8.0	41.4	200	150	8.0	52.8	2,970	1,890	297	253
200 × 150 × 10.0	51.0	200	150	10.0	64.9	3,570	2,260	357	302
200 × 150 × 12.5	62.5	200	150	12.5	79.6	4,240	2,670	424	356
200 × 150 × 14.2	70.0	200	150	14.2	89.2	4,640	2,920	464	389
200 × 150 × 16.0	77.7	200	150	16.0	99	5,040	3,150	504	420
250 × 100 × 5.0	26.5	250	100	5.0	33.7	2,610	618	209	124
250 × 100 × 6.3	33.0	250	100	6.3	42.1	3,210	751	257	150
250 × 100 × 8.0	41.4	250	100	8.0	52.8	3,940	909	315	182
250 × 100 × 10.0	51.0	250	100	10.0	64.9	4,730	1,070	379	214
250 × 100 × 12.5	62.5	250	100	12.5	79.6	5,620	1,240	450	249
250 × 100 × 14.2	70.0	250	100	14.2	89.2	6,160	1,340	493	269
250 × 100 × 16.0	77.7	250	100	16.0	99	6,690	1,430	535	287
250 × 150 × 5.0	30.4	250	150	5.0	38.7	3,360	1,530	269	204
250 × 150 × 6.3	38.0	250	150	6.3	48.4	4,140	1,870	331	250
250 × 150 × 8.0	47.7	250	150	8.0	60.8	5,110	2,300	409	306
250 × 150 × 10.0	58.8	250	150	10.0	74.9	6,170	2,760	494	367
250 × 150 × 12.5	72.3	250	150	12.5	92.1	7,390	3,260	591	435
250 × 150 × 14.2	81.1	250	150	14.2	103	8,140	3,580	651	477
250 × 150 × 16.0	90.3	250	150	16.0	115	8,880	3,870	710	516
250 × 150 × 17.5	97.7	250	150	17.5	124	9,450	4,100	756	546
300 × 100 × 5.0	30.4	300	100	5.0	38.7	4,150	731	276	146
300 × 100 × 6.3	38.0	300	100	6.3	48.4	5,110	890	341	178
300 × 100 × 8.0	47.7	300	100	8.0	60.8	6,300	1,080	420	216
300 × 100 × 10.0	58.8	300	100	10.0	74.9	7,610	1,280	508	255
300 × 100 × 12.5	72.3	300	100	12.5	92.1	9,100	1,490	607	297
300 × 100 × 14.2	81.1	300	100	14.2	103	10,000	1,610	669	321
300 × 100 × 16.0	90.3	300	100	16.0	115	10,900	1,720	729	344
300 × 100 × 17.5	97.7	300	100	17.5	124	11,600	1,800	775	360
300 × 200 × 5.0	38.3	300	200	5.0	48.7	6,320	3,400	421	340
300 × 200 × 6.3	47.9	300	200	6.3	61	7,830	4,190	522	419
300 × 200 × 8.0	60.3	300	200	8.0	76.8	9,720	5,180	648	518
300 × 200 × 10.0	74.5	300	200	10.0	94.9	11,800	6,280	788	628
300 × 200 × 12.5	91.9	300	200	12.5	117	14,300	7,540	952	754
300 × 200 × 14.2	103.0	300	200	14.2	132	15,800	8,330	1,060	833
300 × 200 × 16.0	115.0	300	200	16.0	147	17,400	9,110	1,160	911
300 × 200 × 17.5	125.0	300	200	17.5	159	18,600	9,720	1,240	972
350 × 150 × 5.0	38.3	350	150	5.0	48.7	7,660	2,050	437	274
350 × 150 × 6.3	47.9	350	150	6.3	61	9,480	2,520	542	337
350 × 150 × 8.0	60.3	350	150	8.0	76.8	11,800	3,100	673	414
350 × 150 × 10.0	74.5	350	150	10.0	94.9	14,300	3,740	818	498
350 × 150 × 12.5	91.9	350	150	12.5	117	17,300	4,450	988	593
350 × 150 × 14.2	103.0	350	150	14.2	132	19,200	4,890	1,100	652
350 × 150 × 16.0	115.0	350	150	16.0	147	21,100	5,320	1,200	709
350 × 150 × 17.5	125.0	350	150	17.5	159	22,600	5,640	1,290	752
350 × 250 × 6.3	57.8	350	250	6.3	73.6	13,200	7,880	754	631
350 × 250 × 8.0	72.8	350	250	8.0	92.8	16,400	9,800	940	784
350 × 250 × 10.0	90.2	350	250	10.0	115	20,100	11,900	1,150	955
350 × 250 × 12.5	112.0	350	250	12.5	142	24,400	14,400	1,400	1,160
350 × 250 × 14.2	126.0	350	250	14.2	160	27,200	16,000	1,550	1,280
350 × 250 × 16.0	141.0	350	250	16.0	179	30,000	17,700	1,720	1,410
350 × 250 × 17.5	153.0	350	250	17.5	194	32,200	18,900	1,840	1,510
400 × 200 × 6.3	57.8	400	200	6.3	73.6	15,700	5,380	785	538
400 × 200 × 8.0	72.8	400	200	8.0	92.8	19,600	6,660	978	666
400 × 200 × 10.0	90.2	400	200	10.0	115	23,900	8,080	1,200	808
400 × 200 × 12.5	112.0	400	200	12.5	142	29,100	9,740	1,450	974
400 × 200 × 14.2	126.0	400	200	14.2	160	32,400	10,800	1,620	1,080
400 × 200 × 16.0	141.0	400	200	16.0	179	35,700	11,800	1,790	1,180
400 × 200 × 17.5	153.0	400	200	17.5	194	38,400	12,600	1,920	1,260
400 × 300 × 8.0	85.4	400	300	8.0	109	25,700	16,500	1,280	1,100
400 × 300 × 10.0	106.0	400	300	10.0	135	31,500	20,200	1,580	1,350
400 × 300 × 12.5	131.0	400	300	12.5	167	38,500	24,600	1,920	1,640
400 × 300 × 14.2	148.0	400	300	14.2	189	43,000	27,400	2,150	1,830
400 × 300 × 16.0	166.0	400	300	16.0	211	47,500	30,300	2,380	2,020
400 × 300 × 17.5	180.0	400	300	17.5	229	51,200	32,600	2,560	2,170
450 × 250 × 8.0	85.4	450	250	8.0	109	30,100	12,100	1,340	971
450 × 250 × 10.0	106.0	450	250	10.0	135	36,900	14,800	1,640	1,180
450 × 250 × 12.5	131.0	450	250	12.5	167	45,000	18,000	2,000	1,440
450 × 250 × 14.2	148.0	450	250	14.2	189	50,300	20,000	2,240	1,600
450 × 250 × 16.0	166.0	450	250	16.0	211	55,700	22,000	2,480	1,760
450 × 250 × 17.5	180.0	450	250	17.5	229	60,000	23,700	2,670	1,890
500 × 200 × 8.0	85.4	500	200	8.0	109	34,000	8,140	1,360	814
500 × 200 × 10.0	106.0	500	200	10.0	135	41,800	9,890	1,670	989
500 × 200 × 12.5	131.0	500	200	12.5	167	51,000	11,900	2,040	1,190
500 × 200 × 14.2	148.0	500	200	14.2	189	56,900	13,200	2,280	1,320
500 × 200 × 16.0	166.0	500	200	16.0	211	63,000	14,500	2,520	1,450
500 × 200 × 17.5	180.0	500	200	17.5	229	67,900	15,600	2,720	1,560
500 × 300 × 8.0	97.9	500	300	8.0	125	43,700	20,000	1,750	1,330
500 × 300 × 10.0	122.0	500	300	10.0	155	53,800	24,400	2,150	1,630
500 × 300 × 12.5	151.0	500	300	12.5	192	65,800	29,800	2,630	1,980
500 × 300 × 14.2	170.0	500	300	14.2	217	73,700	33,200	2,950	2,220
500 × 300 × 16.0	191.0	500	300	16.0	243	81,800	36,800	3,270	2,450
500 × 300 × 17.5	208.0	500	300	17.5	264	88,300	39,600	3,530	2,640

Values are nominal. Reference only: check against current manufacturer data and a structural engineer before design use.

Calculator

Steel weight calculator

Pick a section and size, enter the length and quantity, and get the total weight. Plate and flat bar are worked out from their dimensions at 7,850 kg/m³.

Section weight = mass per metre × length × quantity
Plate or flat bar weight = length × width × thickness × 7,850 kg/m³ × quantity

A 305 × 165 × 40 UB is 40.3 kg/m, so four 6 m lengths weigh 40.3 × 6 × 4 = 967.2 kg. A 10 mm plate 1,000 × 500 mm weighs 1.0 × 0.5 × 0.01 × 7,850 = 39.25 kg. Weights are nominal and exclude coatings, plates and fittings.

Weight calculatorkg

Questions

Frequently asked questions

Which side is h on an RHS?

h is the larger outside dimension. Bending about the x–x axis uses the full depth h, which is why Ix is larger than Iy.

What is the difference between hot-finished and cold-formed RHS?

Hot-finished sections (BS EN 10210) have tight corners. Cold-formed sections (BS EN 10219) have larger corner radii and slightly different properties for the same size. This table is hot-finished only.

How do I work out the weight of an RHS?

Multiply the mass per metre by the length. A 200 × 100 × 6.3 RHS at 5 m weighs 28.1 × 5 = 140.5 kg.

How are RHS sizes written?

Depth × width × wall thickness in millimetres, for example 150 × 100 × 8.0.

Standards

Standards referenced

BS 4-1:2005 Structural steel sections. Specification for hot-rolled sections (UB, UC, PFC)
BS EN 10365:2017 Hot rolled steel channels, I and H sections. Dimensions and masses
BS EN 10056-1:2017 Structural steel equal and unequal leg angles. Dimensions
BS EN 10210-2:2019 Hot finished steel structural hollow sections. Tolerances, dimensions and sectional properties
BS EN 10219-2:2019 Cold formed welded steel structural hollow sections (not covered by these tables)

Reference only

Reference only. Values are nominal figures for the standard UK section ranges. Check them against current manufacturer data, and have a structural engineer confirm sizes before you use them in design. Koyda Ltd accepts no liability for decisions based on these tables.

Sizes and dimensions are compiled from the standard section ranges and checked against current manufacturer data (British Steel for beams, columns, channels and large angles; Tata Steel Celsius for hollow sections) and independent published tables. We recalculated area, second moment of area and elastic modulus from the nominal dimensions for every size, and show a value only where it matches a published figure. Diagrams and layout are our own.

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