Castellated beams

8.7. Castellated beams#

Introduction#

../../_images/castellated_beams_2.png — Fig. 8.20 Castellated beams detail.#

Castellated beams are made by cutting standard hot rolled sections lengthwise along a ‘toothed’ line. After cutting, both parts are shifted with respect to each other, placing the ‘teeth’ upon each other. The two halves are welded together. Between the welded connections the characteristic hexagonal holes appear. The increased height is very beneficial for the stiffness of the beam. The bending strength is not increased very much. The shear capacity of the castellated beam is relatively low. If necessary, the hexagonal hole nearest to the supports can be filled up with a plate to locally increase the shear capacity. For these reasons castellated beams are very suitable for long spans with relatively low loads. To prevent local buckling of the web (if necessary, and where needed) local stiffeners can be added 1.

Possible shapes#

Production method#

Production method 1#

Production method 2#

Application examples#

../../_images/castellated_application_1.png — Fig. 8.25 Left: NS station Amsterdam RAI; right: castellated beams are used as facade support#

../../_images/castellated_application_2.png — Fig. 8.26 Left: Transeuro Nijman, Rotterdam, with bracing in the facade; right: cross section of the building#

Castellated beams, section tables#

Castellated beams based on IPE 180, IPE 240, IPE 300, IPE 360#

The tables depicted below are a selection of the available sections 1.

../../_images/castellated_section_profile.png — Fig. 8.27 Castellated section profile#

Based on IPE180#

Table 8.10 IPE180 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
180*	19.2	90	0	0	24	1317	146	83	24	1317	146	83
240	19.2	59.9	120.2	0	27	2543	212	122	21	2466	205	112
270	19.2	45	180	0	29	3332	247	142	19	3074	228	121
300	19.2	30	240.1	0	30	4254	284	165	18	3643	243	126
370	20.6	45	280	100	34	6943	375	221	19	5973	323	169
420	21.3	45	330	150	37	9370	446	265	19	7783	371	193

Properties IPE180

\(h = 180 \ mm\)
\(b = 91 \ mm\)
\(d = 5.3 \ mm\)
\(I_z = 101 \cdot 10^4 \ mm^4\)
\(t = 8 \ mm\)
\(r = 9 \ mm\)
\(W_z = 22 \cdot 10^3 \ mm^3\)

Based on IPE240#

Table 8.11 IPE140 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
240*	31.3	120	0	0	39	3892	324	183	39	3892	324	183
300	31.3	90	120	0	43	6455	430	245	35	6366	424	234
360	31.3	60	240	0	47	9789	544	312	32	9075	504	267
400	31.3	40	320.2	0	49	12479	624	360	29	10783	539	280
460	33	60	340	100	53	17241	750	436	32	15210	661	346
510	33.8	60	390	150	56	21937	860	504	32	18872	740	386

Properties IPE240

\(h = 240 \ mm\)
\(b = 120 \ mm\)
\(d = 6.2 \ mm\)
\(I_z = 284 \cdot 10^4 \ mm^4\)
\(t = 9.8 \ mm\)
\(r = 15 \ mm\)
\(W_z = 47 \cdot 10^3 \ mm^3\)

Based on IPE300#

Table 8.12 IPE300 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
300*	43	150	0	0	54	8356	557	314	54	8356	557	314
375	43	112.5	150	0	59	13850	739	420	48	13650	728	400
450	43	75	300	0	64	21008	934	536	43	19411	863	456
500	43	50	400.2	0	68	26790	1071	619	40	22998	920	477
550	44.9	75	400	100	72	33398	1214	706	43	29611	1077	564
600	45.8	75	450	150	75	40912	1364	798	43	35520	1184	618

Properties IPE300

\(h = 300 \ mm\)
\(b = 150 \ mm\)
\(d = 7.1 \ mm\)
\(I_z = 603 \cdot 10^4 \ mm^4\)
\(t = 10.7 \ mm\)
\(r = 15 \ mm\)
\(W_z = 80 \cdot 10^3 \ mm^3\)

Based on IPE360#

Table 8.13 IPE360 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
360*	58.2	180	0	0	73	16266	904	510	73	16266	904	510
480	58.2	119.9	240.5	0	82	31265	1302	743	63	30338	1263	685
540	58.2	90	360	0	87	40890	1514	869	58	37780	1399	740
640	60.3	90	460	100	95	60520	1891	1097	58	54031	1688	885
690	61.4	90	510	150	99	72094	2090	1218	58	63251	1833	958
740	62.5	90	560	200	103	84907	2295	1345	58	73199	1978	1031

Properties IPE360

\(h = 360 \ mm\)
\(b = 170 \ mm\)
\(d = 8 \ mm\)
\(I_z = 1042 \cdot 10^4 \ mm^4\)
\(t = 12.7 \ mm\)
\(r = 18 \ mm\)
\(W_z = 123 \cdot 10^3 \ mm^3\)

Castellated beams based on HEA 180, HEA 240, HEA 300, HEA 360, HEA 400#

The tables depicted below are a selection of the available sections 1.

Based on HEA180#

Table 8.14 HEA180 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
171*	36.2	85.5	0	0	45	2510	294	162	45	2510	294	162
215	36.2	63.4	88.2	0	48	4168	388	214	43	4134	384	208
257	36.2	42.8	171	0	50	6146	479	265	40	5896	460	243
285	36.2	28.5	228.1	0	52	7761	545	301	38	7167	503	262
357	37.8	42.8	271	100	56	12748	715	398	40	11753	659	343
407	38.6	42.8	321	150	59	17088	841	470	40	15434	759	393

Properties HEA180

\(h = 171 \ mm\)
\(b = 180 \ mm\)
\(d = 6 \ mm\)
\(I_z = 925 \cdot 10^4 \ mm^4\)
\(t = 9.5 \ mm\)
\(r = 15 \ mm\)
\(W_z = 103 \cdot 10^3 \ mm^3\)

Based on HEA240#

Table 8.15 HEA240 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
230*	61.5	115	0	0	77	7763	675	372	77	7763	675	372
290	61.5	85	120.1	0	81	12939	892	491	72	12831	885	477
345	61.5	57.5	230	0	85	18962	1099	606	68	18202	1055	556
385	61.5	37.5	310	0	88	24155	1255	693	65	22292	1158	603
445	63.5	57.5	330	100	93	33273	1495	829	68	31027	1394	727
495	64.5	57.5	380	150	97	42148	1703	947	68	38719	1564	812

Properties HEA240

\(h = 230 \ mm\)
\(b = 240 \ mm\)
\(d = 7.5 \ mm\)
\(I_z = 2770 \cdot 10^4 \ mm^4\)
\(t = 12 \ mm\)
\(r = 21 \ mm\)
\(W_z = 231 \cdot 10^3 \ mm^3\)

Based on HEA300#

Table 8.16 HEA300 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
310*	99.5	155	0	0	124	22929	1479	814	124	22929	1479	814
390	99.5	114.9	160.6	0	132	38044	1950	1071	117	37733	1934	1042
465	99.5	77.5	310	0	138	55913	2405	1323	110	53679	2309	1215
520	99.5	49.9	420.4	0	143	71579	2752	1517	105	66008	2538	1318
565	101.9	77.5	410	100	147	85906	3041	1680	110	80737	2858	1491
615	103.1	77.5	460	150	152	103637	3370	1867	110	96337	3133	1629

Properties HEA300

\(h = 310 \ mm\)
\(b = 300 \ mm\)
\(d = 9 \ mm\)
\(I_z = 6988 \cdot 10^4 \ mm^4\)
\(t = 15.5 \ mm\)
\(r = 27 \ mm\)
\(W_z = 466 \cdot 10^3 \ mm^3\)

Based on HEA360#

Table 8.17 HEA360 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
350*	114.2	175	0	0	143	33090	1891	1044	143	33090	1891	1044
440	114.2	129.8	180.6	0	152	54920	2495	1377	134	54429	2472	1336
525	114.2	87.5	350	0	160	81015	3086	1707	125	77442	2950	1554
585	114.2	57.4	470.4	0	166	103038	3521	1953	119	94364	3225	1676
625	116.9	87.5	450	100	170	119246	3816	2120	125	111652	3573	1867
675	118.2	87.5	500	150	175	141523	4193	2336	125	131106	3885	2024

Properties HEA360

\(h = 350 \ mm\)
\(b = 300 \ mm\)
\(d = 10 \ mm\)
\(I_z = 7889 \cdot 10^4 \ mm^4\)
\(t = 17.5 \ mm\)
\(r = 27 \ mm\)
\(W_z = 526 \cdot 10^3 \ mm^3\)

Based on HEA400#

Table 8.18 HEA400 Steel properties.#
\(h \ [mm]\)	\(G \ [kg/m]\)	\(h_1 \ [mm]\)	\(h_2 \ [mm]\)	\(h_3 \ [mm]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_y \cdot 10^3 \ [mm^3]\)	\(S_y \cdot 10^3 \ [mm^3]\)	\(A_s \cdot 10^2 \ [mm^2]\)	\(I_z [mm^4]\)	\(W_z \cdot 10^3 [mm^3]\)	\(S_z \cdot 10^3 [mm^3]\)
440*	142.4	220	0	0	178	63722	2896	1608	178	63722	2896	1608
550	142.4	165	220	0	191	104609	3804	2115	165	103589	3767	2045
660	142.4	110	440	0	203	157032	4759	2657	153	148869	4511	2378
735	142.4	72.4	590.5	0	212	199928	5438	3047	144	180198	4902	2546
760	145.5	110	540	100	215	215345	5667	3179	153	200255	5270	2760
810	147	110	590	150	221	248493	6136	3451	153	228811	5650	2951

Properties HEA400

\(h = 390 \ mm\)
\(b = 300 \ mm\)
\(d = 11 \ mm\)
\(I_z = 8566 \cdot 10^4 \ mm^4\)
\(t = 19 \ mm\)
\(r = 27 \ mm\)
\(W_z = 8561 \cdot 10^3 \ mm^3\)

1(1,2,3): Grunbauer: The information on integrated beams has been put together in cooperation with Grunbauer B.V. and Bouwen met Staal.