I - beams are widely used in buildings and other metal structures.
Whether the I-section steel is ordinary or light, because the section size is relatively high and narrow, the moment of inertia of the two main axes of the section is large, so it can only be directly used in the web plane bending members or it is composed of lattice stressed members.
The selection of I-steel in the structural design should be based on its mechanical properties, chemical properties, weldable properties, structural size and other reasonable selection of I-steel for use.

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Description

The flange of H-shaped steel is parallel or nearly parallel on the inside and outside, and the end of the flange is at a right Angle, so it is named parallel flange I-steel. The thickness of the web of H-shaped steel is smaller than that of ordinary I-beams with the same height of the web, and the width of the flange is larger than that of ordinary I-beams with the same height of the web, so it is also named wide-rim I-beams. The section shape is similar to the capital Latin letter H of an economic section profile, also known as universal steel beam, wide edge (side) I-steel or parallel flange I-steel. The cross section of H-shaped steel usually includes two parts: web plate and flange plate, also known as waist and side.

Product Name	Q235B hot rolled H beam
Technique	Hot Rolled/Welded
Grade	Q235/Q345/S355/S235/SS400/ASTM36/Q235Bm,A-36,AS300B,S355J0,S450J0-T, S275JR
Flange Thickness	7-40mm
Flange Width	100-500mm
Web Width	100-800mm
Web Thickness	5-30mm
Tolerance	±3%
Surface Treatment	Hot Dip Galvanised/Painting or Black
Application	Mechanical&manufacture,Steel Structure,Shipbuilding,Bridging,Automobile Chassis
Delivery Term	EXW FOB CIF CFR

H-beam has parallel or near-parallel flanges on the inner and outer sides, and the end of the flanges is at a right angle, so it is named parallel flange I-beam.The thickness of the web of

H-beam is smaller than that of the ordinary I-beam with the same height of the web, and the width of the flange is larger than that of the ordinary I-beam with the same height of the web,

so it is also named wide flange I-beam. Determined by the shape, the section modulus, moment of inertia and corresponding strength of H-beam are significantly better than the same

single-weight ordinary I-beam. Used in different requirements of the metal structure, whether it is to withstand bending moment, pressure load, eccentric load shows its superior

performance, can be compared with the ordinary I-beam greatly improve the load-bearing capacity, saving metal 10% ~ 40%. H-beam wide flange, thin web, specifications, flexible use,

used in a variety of truss structure can save 15% ~ 20% of the metal. Due to the parallelism between the inner and outer sides of the flange, the edge end is at right angle, it is easy to

assemble and combine into all kinds of components, thus it can save welding and riveting workload of about 25%, and it can greatly speed up the construction of the project and shorten

the construction period.

H-beam specifications
form	typology	Section size(mm)				cross-section areacm2	theoretical weightkg/m	Cross-section Characterization Parameters
	typology	Section size(mm)						moment of inertia(cm4)		inertial radius(cm)		section modulus(cm3)
	（Height x Width）	H×B	t1	t2	r			moment of inertia(cm4)		inertial radius(cm)		section modulus(cm3)
	（Height x Width）	H×B	t1	t2	r			Ix	Iy	ix	iy	Wx	Wy
HW	100×100	100×100	6	8	10	21.9	17.2	383	134	4.18	2.47	76.5	26.7
	125×125	125×125	6.5	9	10	30.31	23.8	847	294	5.29	3.11	136	47
	175×175	150×150	7	10	13	40.55	31.9	1660	564	6.39	3.73	221	75.1
	175×175	175×175	7.5	11	13	51.43	40.3	2900	984	7.5	4.37	331	112
	200×200	200×200	8	12	16	64.28	50.5	4770	1600	8.61	4.99	477	160
	200×200	200×204	12	12	16	72.28	56.7	5030	1700	8.35	4.85	503	167
	250×250	250×250	9	14	16	92.18	72.4	10800	3650	10.8	6.29	867	292
	250×250	250×255	14	14	16	104.7	82.2	11500	3880	10.5	6.09	919	304
	300×300	294×302	12	12	20	108.3	85	17000	5520	12.5	7.14	1160	365
		300×300	10	15	20	120.4	94.5	20500	6760	13.1	7.49	1370	450
		300×305	15	15	20	135.4	106	21600	7100	12.6	7.24	1440	466
	350×350	344×348	10	16	20	146	115	33300	11200	15.1	8.78	1940	646
	350×350	350×350	12	19	20	173.9	137	40300	13600	15.2	8.84	2300	776
	400×400	388×402	15	15	24	179.2	141	49200	16300	16.6	9.52	2540	809
		394×398	11	18	24	187.6	147	56400	18900	17.3	10	2860	951
		400×400	13	21	24	219.5	172	66900	22400	17.5	10.1	3340	1120
		414×405	18	28	24	296.2	233	93000	31000	17.7	10.2	4490	1530
		400×408	21	21	24	251.5	197	71100	23800	16.8	9.73	3560	1170
		428×407	20	35	24	361.4	284	119000	39400	18.2	10.4	5580	1930
HM	150×100	148×100	6	9	13	27.25	21.4	1040	151	6.17	2.35	140	30.2
	200×150	194×150	6	9	16	39.76	31.2	2740	508	8.3	3.57	283	67.7
	250×175	244×175	7	11	16	56.24	44.1	6120	985	10.4	4.18	502	113
	300×200	294×200	8	12	20	73.03	57.3	11400	1600	12.5	4.69	779	160
	350×250	340×250	9	14	20	101.5	79.7	21700	3650	14.6	6	1280	292
	400×300	390×300	10	16	24	136.7	107	38900	7210	16.9	7.26	2000	481
	450×300	440×300	11	18	24	157.4	124	56100	8110	18.9	7.18	2550	541
	500×300	482×300	11	15	28	146.4	115	60800	6770	20.4	6.8	2520	451
	500×300	488×300	11	18	28	164.4	129	71400	8120	20.8	7.03	2930	541
	600×300	582×300	12	17	28	174.5	137	103000	7670	24.3	6.63	3530	511
		588×300	12	20	28	192.5	151	118000	9020	24.8	6.85	4020	601
		594×302	14	23	28	222.4	175	137000	10600	24.9	6.9	4620	701
HN	175×90	175×90	5	8	10	23.21	18.2	1220	97.6	7.26	2.05	140	21.7
	200×100	198×99	4.5	7	13	23.59	18.5	1610	114	8.27	2.2	163	23
	200×100	200×100	5.5	8	13	27.57	21.7	1880	134	8.25	2.21	188	26.8
	250×125	248×124	5	8	13	32.89	25.8	3560	255	10.4	2.78	287	41.1
	250×125	250×125	6	9	13	37.87	29.7	4080	294	10.4	2.79	326	47
	300×150	298×149	5.5	8	16	41.55	32.6	6460	443	12.4	3.26	433	59.4
	300×150	300×150	6.5	9	16	47.53	37.3	7350	508	12.4	3.27	490	67.7
	350×175	346×174	6	9	16	53.19	41.8	11200	792	14.5	3.86	649	91
	350×175	350×175	7	11	16	63.66	50	13700	985	14.7	3.93	782	113
	400×150	400×150	8	13	16	71.12	55.8	18800	734	16.3	3.21	942	97.9
	400×200	396×199	7	11	16	72.16	56.7	20000	1450	16.7	4.48	1010	145
	400×200	400×200	8	13	16	84.12	66	23700	1740	16.8	4.54	1190	174
	450×150	450×150	9	14	20	83.41	65.5	27100	793	18	3.08	1200	106
	450×200	446×199	8	12	20	84.95	66.7	290000	1580	18.5	4.31	1300	159
	450×200	450×200	9	14	20	97.41	76.5	33700	1870	18.6	4.38	1500	187
	500×200	496×199	9	14	20	101.3	79.5	41900	1840	20.3	4.27	1690	185
		500×200	10	16	20	114.2	89.6	47800	2140	20.5	4.33	1910	214
		506×201	11	19	20	131.3	103	56500	2580	20.8	4.43	2230	257
	600×200	596×199	10	15	24	121.2	95.1	69300	1980	23.9	4.04	2330	199
		600×200	11	17	24	135.2	106	78200	2280	24.1	4.11	2610	228
		606×201	12	20	24	153.3	120	91000	2720	24.4	4.21	3000	271
	700×300	692×300	13	20	28	211.5	166	172000	9020	28.6	6.53	4980	602
	700×300	700×300	13	24	28	235.5	185	201000	10800	29.3	6.78	5760	722	m2/m
	800×300	729×300	14	22	28	243.4	191	254000	9930	32.3	6.39	6400	662
	800×300	800×300	14	26	28	267.4	210	292000	11700	33	6.62	7290	782
HP	200×200	200×204	12	12	16	72.28	56.7	5030	1700	8.35	4.85	503	167	1.16
	250×250	244×252	11	11	16	82.05	64.4	8790	2940	10.4	5.98	720	233	1.45
	250×250	250×255	14	14	16	104.7	82.2	11500	3880	10.5	6.09	919	304	1.46
	300×300	294×302	12	12	20	108.3	85	17000	5520	12.5	7.13	1150	365	1.74
		300×300	10	15	20	120.4	94.5	20500	6760	13.1	7.49	1370	450	1.75
		300×305	15	15	20	135.4	106	21600	7110	12.6	7.24	1440	466	1.76
	350×350	338×351	13	13	20	135.3	106	28200	9380	14.4	8.33	1670	535	2.02
		344×354	16	16	20	166.6	131	35300	11800	14.6	8.43	2050	669	2.04
		350×350	12	19	20	173.9	137	40300	13600	15.2	8.84	2300	776	2.04
		350×357	19	19	20	198.4	156	42800	14400	14.7	8.53	2450	809	2.06
	400×400	388×402	15	15	24	179.2	141	49200	16300	16.6	9.52	2540	809	2.31
		394×405	18	18	24	215.2	169	59900	20000	16.7	9.63	3040	986	2.33
		400×400	13	21	24	219.5	172	66900	22400	17.5	10.1	3340	1120	2.33
		414×405	18	28	24	296.2	233	93000	31000	17.7	10.2	4490	1530	2.37
		400×408	21	21	24	251.5	197	71100	23800	16.8	9.73	3560	1170	2.35
		428×407	20	35	24	361.4	284	119000	39400	18.2	10.4	5580	1930	2.4
		注：	1."#"Indicated specifications are non-standard
			2."*"The specifications indicated are not yet produced domestically
			3.Products with models belonging to the same range have the same height for the inner dimensions.
			4.The formula for the cross-sectional area is "t1(H-2t2)+2Bt2+0.858r2"