ArcelorMittal Europe – Long Products Sections and Merchant Bars An innovative concept for floors

© Ing.-Büro Hauf, Gundelfingen (Do) © Ing.-Büro Hauf, Gundelfingen

Photography : ArcelorMittal Photo Library; © 2017 ArcelorMittal. Care has been taken to ensure that the information in this publication is accurate, but this information is not contractual. Therefore ArcelorMittal and any other ArcelorMittal Group company do not accept any liability for errors or omissions or any information that is found to be misleading.

Figure 1.1: The Slim-Floor Concept This arrangement makes it possible to place slab elements directly onto the lower flange of the beam, which results in an integrated solution characterised by a very slim floor thickness. Figure 1.3: a) Galerie Kons, Luxembourg Figure 1.3: b) Clinique d’Eich, Luxembourg © Astron Buildings S.A. The secret of the design is a special asymmetric cross section with a lower flange that is wider than the upper flange, Figure 1.1. Developed by the ArcelorMittal group, “Slim-Floor” construction is a fast, innovative and economical solution, which combines prefabricated slabs...

2. A wide range of optimal solutions: From beam sections... Slim-Floor beam (up to 8m span) Slim-Floor construction is a well-established and economical solution characterised by integrating the main steel beams into the floor, resulting in inherent fire resistance, limited floor thickness and efficient use of materials in combination with light and slender elements. The span of non-composite Slim-Floor beams can reach up to 8 meters, giving new scope to architects' imagination and guaranteed economy. Figure 2.1 Slim-Floor beam section geometry Figure 2.2 Slim-Floor beam application (Petrusse Building,...

1- HE 160B with plate 300 x 15 2- HE 260B with plate 400 x 20 3- HE 360B with plate 425 x 20 Optimal application range CoSFB 2.5 Application range of composite Slim-Floor beams compared to non-composite Slim-Floor beams All Slim-Floor beams are asymmetrical beams with a lower flange or a welded plate with a width bigger than the upper flange, allowing for easy and safe erection and installation of the slab elements. Asymmetrical beams with different section geometries are available in order to provide the optimal solution according to the project requirements. IFB TYPE A A lower flange plate welded...

SFB A plate is welded under an HE or an IPE section. The linear weight will be slightly higher compared to an IFB type because more material is used, but the cost of fabrication is lower. This solution is appropriate for small-scale standard projects where materials are very readily available. Slim-Floor beam spans from 5m up to 14m with corresponding floor thicknesses from 20cm up to 40cm. The beams can be cambered and may be designed as composite beams, either with shear studs welded on the upper flange or by using the CoSFB technology. Figure 2.7 HB-beam section A further alternative is the...

in-situ concrete Cofraplus® 220 dowel reinforcement Figure 2.9 left: Cofradal slab; right: Cofraplus 220 slab Cofradal 200/230/260 Cofradal is a partially prefabricated slab, which consists of a metal cassette deck, thermal insulation, reinforcement fixed on the metal decking and completed by in-situ concrete. With a low self weight, a high load bearing capacity, excellent thermal and sound insulation and fire resistance of up to fire resistance class REI 120, this slab is a perfect solution for hotels, offices, administrative and residential multi-storey buildings. Moreover, as “Cofradal Decibel”...

Case study: Galerie Kons Galerie Kons Location: Luxembourg Date of construction: 2016 Owner: PEF KONS Investment SA Architect: M3 Architectes Design office: Schroeder & Associés Ingénieurs-conseils Surface: 28800m2 Function: offices, retail shops, residential flats, underground parkings ArcelorMittal Solutions Steel grade Slab typology Beam type Fire Resistance Floor thickness

Case study: ArcelorMittal Office Building AOB - Esch-sur-Alzette Location: Luxembourg Date of construction: 1991 - 1993 Owner: ArcelorMittal Architect: Office Böhm, Cologne Design office: Schroeder & Associés, Ingénieur-conseils Surface: 15000m2 Function: offices ArcelorMittal Solutions Steel grade Beam type Slab typology Hollow core

Santa Maria della Misericordia Hospital Location: Udine (Italy) Date of construction: 2013 Owner: ATON Architect: L+Partners, Milan Design office: Studio d'ingegneria Suraci Surface: 4608m2 Function: Hospital and research centre ArcelorMittal Solutions Steel grade Slab typology Beam type Fire Resistance Hollow core © Studio Suraci, via Chinotto 15, 33100 Udine, Italy Case study: Santa Maria della Misericordia Hospital

3. The advantages of Slim-Floor construction 1. Reduction of floor thickness A reduction of the floor thickness of 25cm to 40cm compared to traditional downstand beams – is possible. For buildings with 10 storeys or more, this results in one additional floor, which leads to a 10%-increase in the useful area of the building. This new flexibility in terms of storey height allows for additional economical savings for the façade and HVAC costs when operating the building. 2. Constructing floors of variable thickness Difference in slab thickness can be adjusted by adding additional supporting plates on...

5. Built-in fire resistance The integration of the beam into the slab provides structural protection directly fulfilling the requirements for fire resistance class up to R90. Therefore, no additional passive fire protection is required. Further increase of the fire resistance can be achieved by simply protecting the lower flange of the beam (e.g. by fire proof boards, sprayed concrete or intumescent coating). The fire resistance of the whole floor also depends on the fire resistance of the slab and on its capacity to adapt to the vertical deformation of the support in fire conditions. infilled concrete...