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Steel Grating Catalog

Press-welded steel bar grating — specifications, common models, and full YB/T 4001.1 Appendix E load & deflection tables for flat bar (30 / 40 / 20 mm pitch), I-bar, and heavy-duty series.

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Product overview

Welded steel bar grating structure diagram showing bearing bars, cross bars, span, width, bar depth, bar thickness, and spacing dimensions — Key dimensions and terminology.

Close-up of forge-welded crossing between bearing bar and twisted cross bar on galvanized steel grating — Crossing detail — forge weld at each intersection.

Press-welded (electro-forged) steel bar grating: bearing bars and twisted square cross bars are resistance-welded at every intersection under approximately 1,000 kN forge pressure. The result is a permanently fused grid with high structural integrity, open area for ventilation, light and drainage, and predictable load paths for engineering design.

Technical specifications

Parameter	Range / description
Construction	Press-welded (electro-forged) at every crossing
Material	Carbon steel Q235B / A36 / S235JR (stainless on request)
Bearing bar height	20, 25, 30, 32, 40, 45, 50, 55, 60, 65, 70 mm
Bearing bar thickness	2, 3, 4, 5 mm (6–10 mm for heavy-duty)
Bearing pitch s₁	12.5, 15, 20, 25, 30, 34.3, 40 mm c/c
Cross bar pitch s₂	25, 38.1, 50, 76.2, 100, 101.6 mm c/c
Cross bar	Twisted square: 5, 6, 8, 10 mm
Surface	Plain (smooth) or serrated (slip-resistant)
Finish	Hot-dip galvanized (≥ 610 g/m²), untreated, powder coated, painted
Panel size	Up to approx. 1,000 × 6,000 mm (custom available)
Open area	65%–85% (varies with pitch)
Tolerances & standards	NAAMM MBG 531, EN ISO 24637, YB/T 4001.1

Designation example

W-30-100, 30×5, Q235B, Serrated, Hot-Dip Galvanized — welded, 30 mm bar pitch, 100 mm cross pitch, 30×5 mm bearing bar, carbon steel, serrated, HDG. YB/T model codes (e.g. G305/30/100W) may also be used.

Common models

Approximate weights for untreated, unbanded panels. HDG adds ~5–10%. T = twisted square cross bar. Ball = heel-proof clear opening.

Model	H mm	T mm	s₁	s₂	Cross	kg/m²	Open %	Ball	Use
WA253-30100	25	3	30	100	6T	~18	83	—	Standard
WA255-30100	25	5	30	100	6T	~26	82	—	General
WA305-30100	30	5	30	100	6T	~30	81	—	General
WA305-3050	30	5	30	50	6T	~34	75	35 mm	Close mesh
WA305-2050	30	5	20	50	6T	~45	65	20 mm	Pedestrian
WA325-30100	32	5	30	100	6T	~33	81	—	General
WA405-30100	40	5	30	100	6T	~39	80	—	Medium
WA505-30100	50	5	30	100	6T	~48	79	—	Heavy
WA605-30100	60	5	30	100	6T	~57	78	—	Heavy
WA305-40100	30	5	40	100	6T	~21	85	—	Economy
WA255-40100	25	5	40	100	6T	~19	86	—	Light
WA305-50100	30	5	50	100	6T	~17	88	—	Open
WA405-3050	40	5	30	50	6T	~44	74	35 mm	Cover
WA505-3050	50	5	30	50	6T	~54	72	35 mm	HD Cover

Design notes

Simply supported: All tables below assume simply supported spans perpendicular to bearing bars. Span range: 200–3000 mm in 200 mm steps.
U vs C: U tables are for 50 mm cross-bar pitch (uniform load, kN/m²). C tables are for 100 mm cross-bar pitch (line load, kN/m). This follows YB/T Appendix E conventions.
Safe loads: Values are safe working loads extracted from YB/T 4001.1-2007 Appendix E — they do not include national partial safety factors. Request stamped calculation sheets for code compliance.
Deflection: Typical limit is span/200 or stricter (owner specification governs). Serrated bars reduce effective depth slightly.
Continuous spans, dynamic loads, and vehicular wheel loads require project-specific analysis — contact Wiberg engineering.
Installation: Welded or clip-fixed. Removable grating per YB/T requires minimum 4 clips per panel. See Installation and Fixings.

Panel width by bar count (E.7)

Nominal panel widths in mm, based on bearing bar count and pitch, per YB/T 4001.1 Appendix E.7. Two columns per pitch: t ≈ 3 mm and t ≈ 5 mm bar thickness.

30 mm pitch

Bars	t ≈ 3	t ≈ 5
8	213	215
9	243	245
10	273	275
11	303	305
12	333	335
13	363	365
14	393	395
15	423	425
16	453	455
17	483	485
18	513	515
19	543	545
20	573	575
21	603	605
22	633	635
23	663	665
24	693	695
25	723	725
26	753	755
27	783	785
28	813	815
29	843	845
30	873	875
31	903	905
32	933	935
33	963	965
34	993	995

40 mm pitch

Bars	t ≈ 3	t ≈ 5
4	123	125
5	163	165
6	203	205
7	243	245
8	283	285
9	323	325
10	363	365
11	403	405
12	443	445
13	483	485
14	523	525
15	563	565
16	603	605
17	643	645
18	683	685
19	723	725
20	763	765
21	803	805
22	843	845
23	883	885
24	923	925
25	963	965
26	1003	1005

20 mm pitch

Bars	t ≈ 3	t ≈ 5
10	183	185
11	203	205
12	223	225
13	243	245
14	263	265
15	283	285
16	303	305
17	323	325
18	343	345
19	363	365
20	383	385
21	403	405
22	423	425
23	443	445
24	463	465
25	483	485
26	503	505
27	523	525
28	543	545
29	563	565
30	583	585
31	603	605
32	623	625
33	643	645
34	663	665
35	683	685
36	703	705
37	723	725
38	743	745
39	763	765
40	783	785
41	803	805
42	823	825
43	843	845
44	863	865
45	883	885
46	903	905
47	923	925
48	943	945
49	963	965
50	983	985
51	1003	1005

Load & deflection tables (YB/T 4001.1 Appendix E)

Spans in mm (column headers): 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000. Bearing bar noted as depth × thickness (mm). "—" = beyond usable range for that bar size. Values from master-data1.js; reference only — verify on released submittals.

E.1 — 30 mm pitch · 50 mm cross · Uniform load U (kN/m²)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
65×5	39.9	10.0	4.4	2.5	1.6	1.1	0.8	0.6	0.5	0.4	0.3	0.3	0.2	0.2	0.2
60×5	34	8.5	3.8	2.1	1.4	0.9	0.7	0.5	0.4	0.3	0.3	0.2	0.2	0.2	—
55×5	28.6	7.1	3.2	1.8	1.1	0.8	0.6	0.4	0.3	0.3	0.2	0.2	0.2	—	—
50×5	23.6	5.9	2.6	1.5	0.9	0.7	0.5	0.4	0.3	0.2	0.2	0.2	—	—	—
50×3	14.2	3.5	1.6	0.9	0.6	0.4	0.3	0.2	0.2	0.1	0.1	—	—	—	—
45×5	19.1	4.8	2.1	1.2	0.8	0.5	0.4	0.3	0.2	0.2	0.1	—	—	—	—
40×5	15.1	3.8	1.7	0.9	0.6	0.4	0.3	0.2	0.2	0.1	—	—	—	—	—
40×3	9.1	2.3	1	0.6	0.4	0.3	0.2	0.1	0.1	—	—	—	—	—	—
35×5	11.6	2.9	1.3	0.7	0.5	0.3	0.2	0.2	0.1	—	—	—	—	—	—
35×3	6.9	1.7	0.8	0.4	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—
32×5	9.7	2.4	1.1	0.6	0.4	0.3	0.2	0.1	0.1	—	—	—	—	—	—
32×3	5.8	1.4	0.6	0.4	0.2	0.2	0.1	0.1	—	—	—	—	—	—	—
25×5	5.9	1.5	0.7	0.4	0.2	0.2	0.1	—	—	—	—	—	—	—	—
25×3	3.5	0.9	0.4	0.2	0.1	0.1	—	—	—	—	—	—	—	—	—
20×5	3.8	0.9	0.4	0.2	0.1	0.1	—	—	—	—	—	—	—	—	—
20×3	2.3	0.6	0.3	0.1	0.1	—	—	—	—	—	—	—	—	—	—

E.1 — 30 mm pitch · 100 mm cross · Line load C (kN/m)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
65×5	4.0	2.0	1.3	1.0	0.8	0.7	0.6	0.5	0.4	0.4	0.4	0.3	0.3	0.3	0.3
60×5	3.4	1.7	1.1	0.8	0.7	0.6	0.5	0.4	0.4	0.3	0.3	0.3	0.3	0.2	—
55×5	2.9	1.4	0.9	0.7	0.6	0.5	0.4	0.3	0.3	0.3	0.3	0.2	0.2	—	—
50×5	2.4	1.2	0.8	0.6	0.5	0.4	0.3	0.3	0.3	0.2	0.2	0.2	—	—	—
50×3	1.4	0.7	0.5	0.3	0.3	0.2	0.2	0.2	0.1	0.1	0.1	—	—	—	—
45×5	1.9	0.9	0.6	0.5	0.4	0.3	0.3	0.2	0.2	0.2	0.2	—	—	—	—
40×5	1.5	0.8	0.5	0.4	0.3	0.3	0.2	0.2	0.2	0.1	—	—	—	—	—
40×3	0.9	0.5	0.3	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—
35×5	1.1	0.6	0.4	0.3	0.2	0.2	0.2	0.1	0.1	—	—	—	—	—	—
35×3	0.7	0.3	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—
32×5	1.0	0.5	0.3	0.2	0.2	0.2	0.1	0.1	0.1	—	—	—	—	—	—
32×3	0.6	0.3	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—
25×5	0.6	0.3	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—
25×3	0.3	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—	—
20×5	0.4	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—	—
20×3	0.2	0.1	0.1	0.1	0.0	—	—	—	—	—	—	—	—	—	—

E.1 — 30 mm pitch · Deflection under U (mm)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
65×5	0.11	0.42	0.95	1.70	2.65	3.81	5.22	6.84	8.70	10.6	12.8	15.4	18.2	21.4	24.2
60×5	0.11	0.46	1.03	1.84	2.89	4.15	5.66	7.45	9.28	11.8	14.3	16.7	20.2	23.2	—
55×5	0.13	0.50	1.13	2.00	3.14	4.53	6.19	8.04	10.3	12.6	15.3	18.0	21.1	—	—
50×5	0.14	0.55	1.24	2.20	3.45	4.97	6.82	8.78	11.4	13.9	16.9	20.3	—	—	—
50×3	0.14	0.55	1.24	2.20	3.43	4.97	6.65	8.95	11.2	14.1	16.4	—	—	—	—
45×5	0.15	0.61	1.38	2.45	3.83	5.56	7.62	9.73	12.4	15.8	18.4	—	—	—	—
40×5	0.17	0.69	1.54	2.76	4.31	6.14	8.37	11.0	13.9	17.8	—	—	—	—	—
40×3	0.17	0.69	1.54	2.74	4.32	6.25	8.39	11.2	14.2	—	—	—	—	—	—
35×5	0.20	0.79	1.77	3.16	4.94	7.17	9.61	12.9	16.2	—	—	—	—	—	—
35×3	0.20	0.79	1.77	3.14	4.84	7.11	9.77	12.0	—	—	—	—	—	—	—
32×5	0.22	0.86	1.94	3.44	5.35	7.64	10.4	14.1	16.8	—	—	—	—	—	—
32×3	0.21	0.86	1.93	3.45	5.41	7.85	10.1	14.2	—	—	—	—	—	—	—
25×5	0.28	1.10	2.47	4.35	6.82	9.92	13.9	—	—	—	—	—	—	—	—
25×3	0.28	1.10	2.47	4.43	6.94	9.35	—	—	—	—	—	—	—	—	—
20×5	0.34	1.37	3.05	5.44	8.73	12.2	—	—	—	—	—	—	—	—	—
20×3	0.34	1.37	3.10	5.53	8.76	—	—	—	—	—	—	—	—	—	—

E.1 — 30 mm pitch · Deflection under C (mm)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
65×5	0.08	0.34	0.76	1.35	2.11	3.06	4.21	5.43	6.98	8.54	10.6	12.7	14.8	17.3	20.0
60×5	0.09	0.37	0.83	1.48	2.31	3.30	4.52	5.93	7.48	9.49	11.2	13.7	16.3	19.0	—
55×5	0.10	0.40	0.90	1.60	2.52	3.60	4.89	6.43	8.16	10.2	12.2	14.7	17.2	—	—
50×5	0.11	0.44	0.99	1.77	2.77	3.99	5.39	7.11	9.14	11.2	13.7	16.3	—	—	—
50×3	0.11	0.44	0.99	1.75	2.75	3.92	5.45	6.97	8.82	11.4	13.1	—	—	—	—
45×5	0.12	0.49	1.09	1.94	3.07	4.35	6.06	7.76	10.2	12.7	15.3	—	—	—	—
40×5	0.14	0.55	1.23	2.17	3.46	5.01	6.73	8.69	11.1	14.4	—	—	—	—	—
40×3	0.14	0.55	1.24	2.16	3.46	5.02	6.44	8.87	11.6	—	—	—	—	—	—
35×5	0.16	0.62	1.40	2.46	3.97	5.70	7.69	10.1	12.5	—	—	—	—	—	—
35×3	0.16	0.62	1.41	2.49	3.75	5.52	7.25	9.71	—	—	—	—	—	—	—
32×5	0.17	0.68	1.55	2.76	4.30	6.30	8.21	11.4	13.7	—	—	—	—	—	—
32×3	0.17	0.69	1.53	2.69	4.16	5.93	8.44	11.2	—	—	—	—	—	—	—
25×5	0.22	0.87	1.93	3.39	5.25	7.50	10.7	—	—	—	—	—	—	—	—
25×3	0.22	0.85	1.86	3.24	5.58	7.00	—	—	—	—	—	—	—	—	—
20×5	0.27	1.05	2.39	4.28	6.57	9.85	—	—	—	—	—	—	—	—	—
20×3	0.27	1.07	2.32	3.98	6.30	—	—	—	—	—	—	—	—	—	—

E.2 — 40 mm pitch · 50 mm cross · U (kN/m²)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
65×5	29.9	7.5	3.3	1.9	1.2	0.8	0.6	0.5	0.4	0.3	0.2	0.2	0.2	0.1	—
60×5	25.5	6.4	2.8	1.6	1.0	0.7	0.5	0.4	0.3	0.3	0.2	0.2	0.1	—	—
55×5	21.4	5.3	2.4	1.3	0.8	0.6	0.4	0.3	0.3	0.2	0.2	0.1	—	—	—
50×5	17.7	4.4	2.0	1.1	0.7	0.5	0.4	0.3	0.2	0.2	0.1	—	—	—	—
50×3	10.6	2.6	1.2	0.7	0.4	0.3	0.2	0.2	0.1	0.1	—	—	—	—	—
45×5	14.3	3.6	1.6	0.9	0.6	0.4	0.3	0.2	0.2	0.1	0.1	—	—	—	—
40×5	11.3	2.8	1.3	0.7	0.5	0.3	0.2	0.2	0.1	0.1	—	—	—	—	—
40×3	6.8	1.7	0.8	0.4	0.3	0.2	0.1	0.1	0.1	—	—	—	—	—	—
35×5	8.7	2.2	1.0	0.5	0.3	0.2	0.2	0.1	0.1	—	—	—	—	—	—
35×3	5.2	1.3	0.6	0.3	0.2	0.1	0.1	0.1	—	—	—	—	—	—	—
32×5	7.3	1.8	0.8	0.5	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—
32×3	4.3	1.1	0.5	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—
25×5	4.4	1.1	0.5	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—
25×3	2.6	0.7	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—	—
20×5	2.8	0.7	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—	—
20×3	1.7	0.4	0.2	0.1	0.1	—	—	—	—	—	—	—	—	—	—

E.2 — 40 mm pitch · 100 mm cross · C (kN/m)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
65×5	3.0	1.5	1.0	0.7	0.6	0.5	0.4	0.4	0.3	0.3	0.3	0.2	0.2	0.2	—
60×5	2.5	1.3	0.8	0.6	0.5	0.4	0.4	0.3	0.3	0.3	0.2	0.2	0.2	—	—
55×5	2.1	1.1	0.7	0.5	0.4	0.3	0.3	0.3	0.2	0.2	0.2	0.2	—	—	—
50×5	1.8	0.9	0.6	0.4	0.3	0.3	0.3	0.2	0.2	0.2	0.2	—	—	—	—
50×3	1.1	0.5	0.3	0.3	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—
45×5	1.4	0.7	0.5	0.3	0.3	0.2	0.2	0.2	0.1	0.1	0.1	—	—	—	—
40×5	1.1	0.6	0.4	0.3	0.2	0.2	0.2	0.1	0.1	0.1	—	—	—	—	—
40×3	0.7	0.3	0.2	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—	—
35×5	0.9	0.4	0.3	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—
35×3	0.5	0.3	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—
32×5	0.7	0.4	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—
32×3	0.4	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—
25×5	0.4	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—
25×3	0.3	0.1	0.1	0.1	0.1	0.0	—	—	—	—	—	—	—	—	—
20×5	0.3	0.1	0.1	0.1	0.1	0.0	—	—	—	—	—	—	—	—	—
20×3	0.2	0.1	0.1	0.0	0.0	—	—	—	—	—	—	—	—	—	—

E.3 — 20 mm pitch · 50 mm cross · U (kN/m²)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
60×5	51	12.8	5.7	3.2	2.0	1.4	1.0	0.8	0.6	0.5	0.4	0.3	0.3	0.3	0.2
55×5	42.9	10.7	4.8	2.7	1.7	1.2	0.9	0.7	0.5	0.4	0.3	0.3	0.3	0.2	—
50×5	35.4	8.8	3.9	2.2	1.4	1.0	0.7	0.6	0.4	0.3	0.3	0.2	0.2	—	—
50×3	21.3	5.3	2.4	1.3	0.8	0.6	0.4	0.3	0.3	0.2	0.2	0.1	—	—	—
45×5	28.7	7.2	3.2	1.8	1.1	0.8	0.6	0.4	0.3	0.3	0.2	0.2	—	—	—
40×5	22.7	5.7	2.5	1.4	0.9	0.6	0.5	0.3	0.3	0.2	0.2	—	—	—	—
40×3	13.6	3.4	1.5	0.8	0.5	0.4	0.3	0.2	0.2	0.1	—	—	—	—	—
35×5	17.4	4.3	1.9	1.1	0.7	0.5	0.3	0.3	0.2	0.2	—	—	—	—	—
35×3	10.4	2.6	1.1	0.7	0.4	0.3	0.2	0.2	0.1	—	—	—	—	—	—
32×5	14.5	3.6	1.6	0.9	0.6	0.4	0.3	0.2	0.2	0.1	—	—	—	—	—
32×3	8.7	2.2	1.0	0.5	0.3	0.2	0.2	0.1	0.1	—	—	—	—	—	—
25×5	8.8	2.2	1.0	0.6	0.3	0.2	0.2	0.1	—	—	—	—	—	—	—
25×3	5.3	1.3	0.6	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—
20×5	5.7	1.4	0.6	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—
20×3	3.4	0.8	0.4	0.2	0.1	0.1	—	—	—	—	—	—	—	—	—

E.3 — 20 mm pitch · 100 mm cross · C (kN/m)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
60×5	5.1	2.5	1.7	1.3	1.0	0.8	0.7	0.6	0.6	0.5	0.5	0.4	0.4	0.4	0.3
55×5	4.3	2.1	1.4	1.1	0.8	0.7	0.6	0.5	0.5	0.4	0.4	0.3	0.3	0.3	—
50×5	3.5	1.8	1.2	0.9	0.7	0.6	0.5	0.4	0.4	0.3	0.3	0.3	0.3	—	—
50×3	2.1	1.1	0.7	0.5	0.4	0.3	0.3	0.3	0.2	0.2	0.2	0.2	—	—	—
45×5	2.9	1.4	0.9	0.7	0.6	0.5	0.4	0.3	0.3	0.3	0.3	0.2	—	—	—
40×5	2.3	1.1	0.8	0.6	0.5	0.4	0.3	0.3	0.3	0.2	0.2	—	—	—	—
40×3	1.4	0.7	0.5	0.3	0.3	0.2	0.2	0.2	0.1	0.1	—	—	—	—	—
35×5	1.7	0.9	0.6	0.4	0.3	0.3	0.2	0.2	0.2	0.2	—	—	—	—	—
35×3	1.0	0.5	0.3	0.3	0.2	0.2	0.1	0.1	0.1	—	—	—	—	—	—
32×5	1.4	0.7	0.5	0.4	0.3	0.2	0.2	0.2	0.2	0.1	—	—	—	—	—
32×3	0.9	0.4	0.3	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—
25×5	0.9	0.4	0.3	0.2	0.2	0.1	0.1	0.1	—	—	—	—	—	—	—
25×3	0.5	0.3	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—
20×5	0.6	0.3	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—
20×3	0.3	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—	—

E.4 — I-bar · 30 mm pitch · U (kN/m²)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
75×7	64.6	16.1	7.2	4.0	2.6	1.8	1.3	1	0.8	0.6	0.5	0.4	0.4	0.3	0.3
65×7	48.6	12.2	5.4	3.0	1.9	1.4	1.0	0.8	0.6	0.5	0.4	0.3	0.3	0.2	0.2
60×7	42.2	10.5	4.7	2.6	1.7	1.2	0.9	0.7	0.5	0.4	0.3	0.3	0.2	0.2	0.2
55×7	35.0	8.8	3.9	2.2	1.4	1.0	0.7	0.5	0.4	0.3	0.3	0.2	0.2	0.2	—
50×7	29.1	7.3	3.2	1.8	1.2	0.8	0.6	0.5	0.3	0.3	0.2	0.2	0.2	—	—
50×5	20.9	5.2	2.3	1.3	0.8	0.6	0.4	0.3	0.3	0.2	0.2	0.1	—	—	—
44×5	16.5	4.1	1.8	1.0	0.7	0.5	0.3	0.3	0.2	0.2	0.1	—	—	—	—
38×5	12.5	3.1	1.4	0.8	0.5	0.3	0.3	0.2	0.1	0.1	—	—	—	—	—
32×5	8.8	2.2	1.0	0.6	0.3	0.2	0.2	0.1	0.1	—	—	—	—	—	—
25×5	5.4	1.4	0.6	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—

E.4 — I-bar · 30 mm pitch · C (kN/m)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
75×7	6.5	3.2	2.1	1.6	1.3	1.1	0.9	0.8	0.7	0.6	0.6	0.5	0.5	0.5	0.4
65×7	4.9	2.4	1.6	1.2	1.0	0.8	0.7	0.6	0.5	0.5	0.4	0.4	0.4	0.3	0.3
60×7	4.2	2.1	1.4	1.1	0.8	0.7	0.6	0.5	0.5	0.4	0.4	0.3	0.3	0.3	0.3
55×7	3.5	1.8	1.2	0.9	0.7	0.6	0.5	0.4	0.4	0.3	0.3	0.3	0.3	0.3	—
50×7	2.9	1.4	1.0	0.7	0.6	0.5	0.4	0.4	0.3	0.3	0.3	0.2	0.2	—	—
50×5	2.1	1.0	0.7	0.5	0.4	0.3	0.3	0.3	0.2	0.2	0.2	0.2	—	—	—
44×5	1.6	0.8	0.6	0.4	0.3	0.3	0.2	0.2	0.2	0.2	0.1	—	—	—	—
38×5	1.2	0.6	0.4	0.3	0.2	0.2	0.2	0.1	0.1	0.1	—	—	—	—	—
32×5	0.9	0.4	0.3	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—
25×5	0.5	0.3	0.2	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—

E.5 — I-bar · 40 mm pitch · U (kN/m²)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
75×7	48.5	12.1	5.4	3.0	1.9	1.3	1.0	0.8	0.8	0.6	0.5	0.4	0.3	0.3	0.2
65×7	36.5	9.1	4.0	2.3	1.4	1.0	0.7	0.6	0.6	0.5	0.4	0.3	0.3	0.2	0.2
60×7	31.6	7.9	3.5	2.0	1.3	0.9	0.6	0.5	0.5	0.4	0.3	0.3	0.2	0.2	0.2
55×7	26.3	6.6	2.9	1.6	1.1	0.7	0.5	0.4	0.4	0.3	0.3	0.2	0.2	0.1	—
50×7	21.8	5.5	2.4	1.4	0.9	0.6	0.4	0.3	0.3	0.3	0.2	0.2	0.1	—	—
50×5	15.6	3.9	1.7	1.0	0.6	0.4	0.3	0.2	0.2	0.2	0.1	0.1	—	—	—
44×5	12.4	3.1	1.4	0.8	0.5	0.3	0.3	0.2	0.2	0.1	0.1	—	—	—	—
38×5	9.3	2.3	1.0	0.6	0.4	0.3	0.2	0.1	0.1	0.1	—	—	—	—	—
32×5	6.6	1.6	0.7	0.4	0.3	0.2	0.1	0.1	0.1	—	—	—	—	—	—
25×5	4.1	1.0	0.5	0.3	0.2	0.1	0.1	—	—	—	—	—	—	—	—

E.5 — I-bar · 40 mm pitch · C (kN/m)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
75×7	4.8	2.4	1.6	1.2	1.0	0.8	0.7	0.6	0.6	0.5	0.5	0.4	0.4	0.4	0.3
65×7	3.6	1.8	1.2	0.9	0.7	0.6	0.5	0.5	0.5	0.4	0.4	0.3	0.3	0.3	0.3
60×7	3.2	1.6	1.1	0.8	0.6	0.5	0.5	0.4	0.4	0.3	0.3	0.3	0.3	0.2	0.2
55×7	2.6	1.3	0.9	0.7	0.5	0.4	0.4	0.3	0.3	0.3	0.3	0.2	0.2	0.2	—
50×7	2.2	1.1	0.7	0.5	0.4	0.4	0.3	0.3	0.3	0.2	0.2	0.2	0.2	—	—
50×5	1.6	0.8	0.5	0.4	0.3	0.3	0.2	0.2	0.2	0.2	0.1	0.1	—	—	—
44×5	1.2	0.6	0.4	0.3	0.2	0.2	0.2	0.1	0.1	0.1	0.1	—	—	—	—
38×5	0.9	0.5	0.3	0.2	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—
32×5	0.7	0.3	0.2	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—	—
25×5	0.4	0.2	0.1	0.1	0.1	0.1	0.1	—	—	—	—	—	—	—	—

E.6 — Heavy-duty · U (kN/m²)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
G1508/40/100 150×8	255	63.8	28.3	15.9	10.2	7.1	5.2	4.0	3.1	2.5	2.1	1.8	1.5	1.3	1.1
G1308/40/100 130×8	192	47.9	21.3	12.0	7.7	5.3	3.9	3.0	2.4	1.9	1.6	1.3	1.1	1.0	0.8
G1208/40/100 120×8	163	40.8	18.1	10.2	6.5	4.5	3.3	2.5	2.0	1.6	1.3	1.1	1.0	0.8	0.7
G1008/40/100 100×8	113	28.3	12.6	7.1	4.5	3.1	2.3	1.8	1.4	1.1	0.9	0.8	0.7	0.6	0.5
G908/40/100 90×8	91.8	22.9	10.2	5.7	3.7	2.5	1.9	1.4	1.1	0.9	0.8	0.6	0.5	0.5	0.4
G808/40/100 80×8	72.5	18.1	8.1	4.5	2.9	2.0	1.5	1.1	0.9	0.7	0.6	0.5	0.4	0.4	0.3
G758/40/100 75×8	63.8	15.9	7.1	4.0	2.5	1.8	1.3	1.0	0.8	0.6	0.5	0.4	0.4	0.3	0.3
G756/30/100 75×6	63.8	15.9	7.1	4.0	2.5	1.8	1.3	1.0	0.8	0.6	0.5	0.4	0.4	0.3	0.3
G756/40/100 75×6	47.8	11.9	5.3	3.0	1.9	1.3	1.0	0.7	0.6	0.5	0.4	0.3	0.3	0.2	0.2
G706/30/100 70×6	55.5	13.9	6.2	3.5	2.2	1.5	1.1	0.9	0.7	0.6	0.5	0.4	0.3	0.3	0.2
G706/40/100 70×6	41.6	10.4	4.6	2.6	1.7	1.1	0.8	0.7	0.5	0.4	0.3	0.3	0.2	0.2	0.2

E.6 — Heavy-duty · C (kN/m)

Bearing bar	200	400	600	800	1000	1200	1400	1600	1800	2000	2200	2400	2600	2800	3000
G1508/40/100 150×8	25.5	12.8	8.5	6.4	5.1	4.3	3.6	3.2	2.8	2.5	2.3	2.1	2.0	1.8	1.7
G1308/40/100 130×8	19.1	9.6	6.4	4.8	3.8	3.2	2.7	2.4	2.1	1.9	1.7	1.6	1.5	1.4	1.3
G1208/40/100 120×8	16.3	8.2	5.4	4.1	3.3	2.7	2.3	2.0	1.8	1.6	1.5	1.4	1.3	1.2	1.1
G1008/40/100 100×8	11.3	5.7	3.8	2.8	2.3	1.9	1.6	1.4	1.3	1.1	1.0	0.9	0.9	0.8	0.8
G908/40/100 90×8	9.2	4.6	3.1	2.3	1.8	1.5	1.3	1.1	1.0	0.9	0.8	0.8	0.7	0.7	0.6
G808/40/100 80×8	7.3	3.6	2.4	1.8	1.4	1.2	1.0	0.9	0.8	0.7	0.7	0.6	0.6	0.5	0.5
G758/40/100 75×8	6.4	3.2	2.1	1.6	1.3	1.1	0.9	0.8	0.7	0.6	0.6	0.5	0.5	0.5	0.4
G756/30/100 75×6	6.4	3.2	2.1	1.6	1.3	1.1	0.9	0.8	0.7	0.6	0.6	0.5	0.5	0.5	0.4
G756/40/100 75×6	4.8	2.4	1.6	1.2	0.9	0.8	0.7	0.6	0.5	0.5	0.4	0.4	0.4	0.3	0.3
G706/30/100 70×6	5.5	2.8	1.9	1.4	1.1	0.9	0.8	0.7	0.6	0.6	0.5	0.5	0.4	0.4	0.4
G706/40/100 70×6	4.2	2.1	1.4	1.0	0.8	0.7	0.6	0.5	0.5	0.4	0.4	0.3	0.3	0.3	0.3

Disclaimer: Load and deflection values are extracted from YB/T 4001.1-2007 Appendix E for reference and design selection only. They do not constitute a compliance guarantee for any specific national code. Final engineering responsibility rests with the Engineer of Record. Contact Wiberg for project-specific stamped calculations and shop drawings.

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Bars	t ≈ 3	t ≈ 5
8	213	215
9	243	245
10	273	275
11	303	305
12	333	335
13	363	365
14	393	395
15	423	425
16	453	455
17	483	485
18	513	515
19	543	545
20	573	575
21	603	605
22	633	635
23	663	665
24	693	695
25	723	725
26	753	755
27	783	785
28	813	815
29	843	845
30	873	875
31	903	905
32	933	935
33	963	965
34	993	995

Bars	t ≈ 3	t ≈ 5
8	213	215
9	243	245
10	273	275
11	303	305
12	333	335
13	363	365
14	393	395
15	423	425
16	453	455
17	483	485
18	513	515
19	543	545
20	573	575
21	603	605
22	633	635
23	663	665
24	693	695
25	723	725
26	753	755
27	783	785
28	813	815
29	843	845
30	873	875
31	903	905
32	933	935
33	963	965
34	993	995

Bars	t ≈ 3	t ≈ 5
8	213	215
9	243	245
10	273	275
11	303	305
12	333	335
13	363	365
14	393	395
15	423	425
16	453	455
17	483	485
18	513	515
19	543	545
20	573	575
21	603	605
22	633	635
23	663	665
24	693	695
25	723	725
26	753	755
27	783	785
28	813	815
29	843	845
30	873	875
31	903	905
32	933	935
33	963	965
34	993	995