Light & Junior Beams (LB, JB) — weight chart

All 25 sections from IS 808 Table 2 - Light/Junior Beams. Click a designation for the full property table and the cross-section drawn to its own dimensions.

Light & Junior Beams (LB, JB): mass and section properties
Designation	Weightkg/m	Areacm²	Depthmm	Widthmm	Webmm	Flangemm	Izzcm⁴	Zzzcm³
JB 150	7.07	9	150	50	3	4.6	321	42.8
JB 175	8.07	10.2	175	50	3.2	4.8	480	54.9
JB 200	9.92	12.6	200	60	3.4	5	780	78
JB 225	12.78	16.2	225	80	3.7	5	1,310	116
LB 75	6.05	7.71	75	50	3.7	5	72.7	19.3
LB 100	8.01	10.2	100	50	4	6.4	168	33.6
LB(P) 100	8.75	11.1	100	50	4.3	7	181	36.3
LB 125	11.87	15.1	125	75	4.4	6.5	406	65.1
LB 150	14.19	18	150	80	4.8	6.8	687	91.7
LB 175	16.59	21.1	175	90	5	6.9	1,090	124
LB(P) 175	16.6	21.1	175	80	5.2	7.7	1,060	122
LB 200	19.83	25.2	200	100	5.4	7.3	1,690	169
LB(P) 200	21.06	26.8	200	100	5.6	8	1,800	180
LB 225	23.47	29.9	225	100	5.8	8.6	2,500	222
LB 250	27.87	35.5	250	125	6.1	8.2	3,720	297
LB 275	32.96	42	275	140	6.4	8.8	5,370	391
LB 300	37.72	48	300	150	6.7	9.4	7,340	489
LB(P) 300	41.5	52.8	300	140	7	11.6	8,140	542
LB 325	43.07	54.8	325	165	7	9.8	9,880	608
LB 350	49.44	63	350	165	7.4	11.4	13,100	752
LB 400	56.82	72.4	400	165	8	12.5	19,300	965
LB 450	65.22	83.1	450	170	8.6	13.4	27,500	1,220
LB 500	74.92	95.4	500	180	9.2	14.1	38,500	1,540
LB 550	86.28	109	550	190	9.9	15	53,100	1,930
LB 600	99.39	126	600	210	10.5	15.5	72,900	2,430

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Other tables

Medium & Wide Flange Beams (MB, WB) IS 808 Table 1 · 28 sections Narrow Parallel Flange Beams (NPB) IS 808 Table 3 · 70 sections Wide Parallel Flange Beams (WPB) IS 808 Table 4 · 123 sections Column / Heavy Beams (SC, HB) IS 808 Table 5 · 26 sections Sloping Flange Channels (MC) IS 808 Table 6 · 20 sections Sloping Flange Channels (LC, JC) IS 808 Table 7 · 20 sections Parallel Flange Channels (MCP) IS 808 Table 8 · 20 sections Equal Leg Angles IS 808 Table 9 · 72 sections Unequal Leg Angles IS 808 Table 10 · 19 sections Angles (supplementary) IS 808 Table 11 · 62 sections Unequal Leg Angles (supplementary) IS 808 Table 12 · 45 sections Parallel Flange Bearing Piles (PBP) IS 808 Table 13 · 29 sections Square Hollow Sections IS 4923:2017 (Amd. 2) Table 1 · 212 sections Rectangular Hollow Sections IS 4923:2017 Table 2 · 216 sections Circular Hollow Sections IS 1161:2014 Table 1 · 80 sections

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Common questions about Light & Junior Beams (LB, JB)

How many light & junior beams (lb, jb) are there in IS 808 : 2021?

25, from LB 75 at 6.05 kg per metre to LB 600 at 99.39 kg per metre. They are printed in IS 808 Table 2 - Light/Junior Beams.

Which is the lightest light & junior beams (lb, jb) in this table?

LB 75, at 6.05 kg per metre with a sectional area of 7.71 cm². The heaviest is LB 600 at 99.39 kg per metre.

How do I work out the weight of a length from this chart?

Multiply the mass per metre by the length and the number of pieces. LB 75 at 6.05 kg/m, in 6 m lengths, ten of them, is 6.05 × 6 × 10 = 363 kg. The standard publishes the mass, so there is nothing to compute from the area.

Where these figures come from. IS 808 Table 2 - Light/Junior Beams Section properties are facts published in the standards, and they are reproduced here as printed. Where a standard contradicts itself, both of its figures are shown and neither is corrected.

What is ours. The selection and arrangement of these tables, the checks run against them, and the findings those checks produced — which rows disagree with themselves, which figures were superseded by amendment, and which could not be read — are QuickBOQ’s work, and so is this wording. Quote the numbers freely; they belong to everyone. Copying the compilation and the commentary is a different thing, and we would rather you linked to it.