Flooring

A report from the Steel Construction Institute (SCI) describes their independent review of the performance of the Magnelis® ZM120 coating for corrosion protection. An innovative metallic coating that offers protection in the harshest environments, Magnelis® is a ZM (zinc-aluminium-magnesium) coating in accordance with EN 10346:2015.

Review of Magnelis® coating performance as corrosion protection

The SCI report details the performance of Magnelis® ZM120 coating against corrosion compared with traditional Z275 coating and includes the surface, cut edges, deformed elements, and welded tubes. This independent review and assessment was conducted via a wide range of testing, such as salt-spray tests according to ISO 9227, cyclic tests VDA 621-415 and ECC1, and outdoor exposure tests of up to 10 years.

Conclusions and recommendations

As a result of the performance review and assessment of research information, the SCI findings are as follows:

• Magnelis® ZM120 provides corrosion protection which is not less than the corrosion protection provided by Z275 coating.
• This conclusion applies to surface protection and to protection of cut edges.
• Magnelis® ZM120 is suitable for the same applications as the Z275 coating which is typically specified in UK and Irish construction.
• The design life predictions for the Z275 coating as stated in SCI publication P262 are also applicable to Magnelis® ZM120.

Magnelis® ZM120 applications

While the primary application under consideration was the use of Magnelis® on cold formed sections used in light steel framing, Magnelis® ZM120 is already widely used to manufacture cable trays, flooring systems, indoor ventilation equipment, ceilings, walls and partitions, racking systems, profiled members, and opened and closed profiles.

Magnelis® can be applied to an extensive scope of steel grades, including steels for cold forming and deep drawing applications, as well as structural and high strength, low alloy steels.

About SCI

The Steel Construction Institute has been a trusted, independent source of information and engineering expertise globally for over 30 years. SCI is a leading, independent provider of technical expertise and a disseminator of best practice to the steel construction sector.

The SCI supports everyone involved in steel construction from manufacturers, consulting and design engineers, architects, and product developers to industry groups and peers.

Text:
Constructalia
ArcelorMittal

Images:
SCI
ArcelorMittal

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Review of Magnelis® coating performance as corrosion protection by the Steel Construction Institute

Using an 80 mm high trapezoidal steel profile alongside a lower volume of poured concrete, Cofraplus® 80 outperforms a traditional precast slab in a greener and more environmentally conscious package.

A new flooring solution for construction companies that want to build differently

With an estimated 25% reduction in overall slab weight, the Cofraplus® 80 flooring system has a positive impact on surrounding load bearing beams, columns, and even foundations, leading to more cost effective, lower mass, and ultimately more sustainable construction. Cofraplus® 80 reduces CO2 emissions by 15% compared to a traditional precast slab.

The cost savings and environmental benefits extend into efficient transportation, storage, and installation. For a 1400 m² floor, Cofraplus® 80 requires only one truck delivery to site and 12 crane movements to unload (as the lightweight profiles can be efficiently stacked) compared with 8 deliveries and 96 crane movements for a prefabricated slab.

Similarly, during installation, a single Cofraplus® 80 profile weighs only 52 kg whereas the equivalent precast slab weighs 1875 kg. A single team can manually install up to 600 m2 safely in just one day while a crane is needed to install the same surface of precast slab.

Thus, logistics is one of the key areas where Cofraplus® 80 really scores over the prefabricated concrete alternative.

Flexibility and long spans

Cofraplus® 80 is flexible enough to be adapted to specific project requirements and detailed design drivers. It can be used alongside all structural materials – including steel or timber beams and concrete - and with any kind of modern build method.

ArcelorMittal Construction has developed a new range of dedicated system accessories that provides a complete solution for installing the slab and pouring the concrete.

Suspended elements such as tubes, ducts, and suspended ceiling fixtures can be anchored using a specific accessory so there is no need for drilling of the concrete during installation or refurbishment. This saves time and cost on floor adaptations and reduces noise levels for those living or working nearby.

In standard mode, the system is compatible with through-deck welding connectors, or it can be supplied in a pre-punched version to suit shear connectors welded to the beam.

The Cofraplus® 80 system can span up to 4.5 m without props and more than 6.5 m with props. The geometry of the prefabricated steel means that it can serve both as shuttering during the pouring phase and reinforcement during the service phase. Its specific geometry means that composite action with the concrete is optimal.

Text:
ArcelorMittal Construction
Constructalia

Images:
ArcelorMittal Construction

Related link(s)

ArcelorMittal has recently launched a new and updated version of our CoSFB software which allows for the calculation of composite integrated beams (SFB) in cold conditions.

CoSFB version 1.8 also includes calculations with cut-off HD and HL sections in addition to several bug fixes and layout improvements.

Download the latest version of CoSFB for Windos and MacOS from our software page.

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