8.8. Integrated beams

Introduction

Integrated beams, in combination with hollow core slabs, precast concrete planks or composite floors, form a solid floor construction. The beams are completely integrated in the floor, thereby reducing structural height. The welded beams allow for a fast and easy erection. A wide range of different types is available. Examples are the top hat beams (THQ-beams), SFB- beams and IFB-beams 1.

Fig. 8.29 Two types of top hat beams (SFB on the left and IFB on the right.)

Possible shapes

A wide range of integrated beams is available. Each with is own specific (brand)name. In general, the beams can be divided between open sections and closed sections.

Note

SFB: Slim Floor Beam
IFB: Integrated Floor Beam
ASB: Asymmetric Slimflor Beams
RHSFB: Rectangular Hollow Section Fabricated Beams
THQ: Top Hat Q-Beams

Fig. 8.30 Left: SFB and IFB beams (open beam type); middle: THQ, straight and inclined top hat beams (closed beam type); right: RHSFB (closed) and ASB (open) beam type

Production

Top hat beams are produced by welding rolled plates (of different thicknesses) together. By adding adding stiffeners inside, the profiles are stiffened.

SFB beams (Slim Floor Beam) are made by welding a wide steel strip on a standard profile (HEA, HEB en HEM).

IFB beams (Integrated Floor Beam) are composed of a halved standard profile and a new (wider or smaller) flange.

Fig. 8.31 THQ, straight and inclined top hat beams

Fig. 8.32 SFB and IFB beams

Application examples

Fig. 8.33 Application of hollow core slabs in
combination with THQ-beams

Fig. 8.34 Composite floor on ASB-beam

Fig. 8.35 Special beam to column connections
ensure a fast erection

Integrated beams, section tables

SFB beams

Fig. 8.36 Integrated SFB

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

Table 8.19 Steel sections and properties.

\(h \ [mm]\)	profile type	\(G \ [kg/m]\)	\(b_u \ [mm]\)	\(t \ [mm]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_{y;el} \cdot 10^4 \ [mm^3]\)	\(W_{y;pl} \cdot 10^4 \ [mm^3]\)	\(M_{y;u} \ [kNm]\)	\(V_{z;u} \ [kN]\)
180	HE180B	84.2	400	10	6073	482	599	213	527
180	HE180B	90.6	400	12	6386	488	612	217	527
200	HE200B	94.5	400	10	8616	634	783	278	648
200	HE200B	100.9	400	12	9042	646	799	283	648
200	HE200B	110.5	400	15	9629	655	822	292	648
250	HE260A	112.6	450	12	16169	924	1107	328	249
270	HE240M	202.9	450	12	32746	1985	2513	892	1626
270	HE240M	213.7	450	15	34546	2020	2569	912	1626
270	HE240M	231.7	450	20	37362	2076	2664	946	1626

IFB beams

Fig. 8.37 Integrated IFB

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

Table 8.20 IFB beams and properties.

\(h \ [mm]\)	profile type	\(G \ [kg/m]\)	\(b_u \ [mm]\)	\(b_u \ [mm]\)	\(t \ [mm]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_{y;el} \cdot 10^4 \ [mm^3]\)	\(W_{y;pl} \cdot 10^4 \ [mm^3]\)	\(M_{y;u} \ [kNm]\)	\(V_{z;u} \ [kN]\)
145	HE300A	85.2	300	500	10	4976	607	704	215	250
150	HE300C	150.0	300	500	15	8687	1022	1207	428	877
150	HE300M	221.2	300	500	25	13091	1423	1837	652	1142
175	HE360A	97.1	300	500	10	8008	852	955	339	617
180	HE360B	120.2	300	500	12	10284	1039	1194	424	775
180	HE320M	204.8	300	500	20	16684	1620	1944	690	1279
195	HE400A	103.6	300	500	10	10370	969	1108	393	715
200	HE400B	139.2	300	500	15	14915	1356	1566	556	886
200	HE400M	230.0	300	500	25	24010	2052	2546	904	1359
245	HE500A	127.2	300	500	12	19880	1484	1694	601	927
250	HE500B	155.6	300	500	15	25233	1855	2122	753	1121
262	HE500M	217.6	300	500	20	37400	2544	3030	1076	1632
320	HE650A	156.8	300	500	15	41378	2448	2732	970	1242
320	HE650M	249.6	300	500	25	64957	3670	4310	1530	1888
395	HE800A	174.4	300	500	15	67206	3170	3635	1290	1640
400	HE800B	213.6	300	500	20	85488	4032	4574	1624	1919
400	HE800M	261.6	300	500	25	104241	4804	5581	1981	2290

THQ hoed liggers

Fig. 8.38 Integrated THQ

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

Table 8.21 THQ beams and properties.

\(h \ [mm]\)	\(G \ [kg/m]\)	\(t_w \ [mm]\)	\(b_0 \ [mm]\)	\(t_0 \ [mm]\)	\(b_u \ [mm]\)	\(t_u \ [mm]\)	\(I_y \cdot 10^4 \ [mm^4]\)	\(W_{y;el} \cdot 10^4 \ [mm^3]\)	\(W_{y;pl} \cdot 10^4 \ [mm^3]\)	\(M_{y;u} \ [kNm]\)	\(V_{z;u} \ [kN]\)
150	55.8	5	190	12	400	8	3238	364	445	158	308
150	63.8	5	240	12	450	8	3813	443	526	187	308
150	71.8	5	290	12	500	8	4377	527	606	215	308
180	58.2	5	190	12	400	8	4763	454	552	196	369
180	66.2	5	240	12	450	8	5592	548	648	230	369
180	74.2	5	290	12	500	8	6407	647	743	264	369
200	59.8	5	190	12	400	8	5959	514	626	222	410
200	67.8	5	240	12	450	8	6984	624	732	260	410
200	75.8	5	290	12	500	8	7991	733	836	297	410
265	80.2	6	190	15	400	10	13511	889	1089	387	652
265	90.2	6	240	15	450	10	15752	1072	1263	448	652
265	100.2	6	290	15	500	10	17958	1247	1433	509	652
320	109.8	8	190	20	400	12	25790	1457	1761	625	1050
320	122.6	8	240	20	450	12	29869	1737	2020	717	1050
320	135.4	8	290	20	500	12	33885	2029	2275	808	1050
400	150.0	10	190	25	400	15	52566	2400	2916	1035	1640
400	166.0	10	240	25	450	15	60501	2840	3319	1178	1640
400	182.0	10	290	25	500	15	68329	3269	3715	1319	1640

---

1(1,2,3,4)

Grunbauer: The information on integrated beams has been put together in cooperation with Grunbauer B.V. and Bouwen met Staal.