MTR® A Beam
Self support, reinforcement, and formwork in a single element
(also R 60/90/120)
The MTR® A beam, with steel bottom plate, is self-supporting in the assembly and deck casting phase. It can satisfy any architectural requirement, representing the alternative and ideal solution in comparison to the construction limits that characterise the traditional systems.
It has CE marking in accordance with the EN 1090-1 norm, and it is made up of a bottom plate, top chord, steel cores, metal structure completed during the work by a collaborating concrete casting.
This structural solution allows you to realise framework structures of any category in a seismic zone, combining different slab typologies according to the building and the functional performances required.
Completing casting concrete
C25/30 when not otherwise prescribed by the designer.
The beam supports itself and the slab burdening it from the very moment in which it is laid on the pillar, even before the completing casting.
Gas-shielded continuous wire feed welding (EN ISO 4063-135 Process) iin accordance with European technical standard.
In the First phase Eurocode 3, in the Second phase Eurocodes 2, 3, and 4. For designs in seismic zone, Eurocode 8.
According to calculation procedure of the MTR® Software based on the current standard.
Mechanical fire resistance (R)
Native fire resistant (R) with additional side steel rods or with bottom base treated with intumescent paints, fireproof plasterboards and coatings.
Steel bottom plate in accordance with the EN ISO 10025-2 norm with the function of reinforcement, support for the slab, and formwork for the completing casting.
It has CE marking in accordance with the EN 1090-1 norm
THE ADVANTAGES OF THE MTR® A BEAM
- Reduction of the construction time of the horizontal structures by 70%
- Reduction of the number of pillars and their sections
- Reduction of the beam sections in width and height
- Reduction of the stress on the pillars
- Reduction of the concrete for the beams
- Complete elimination of formwork and shoring
- Positioning of the self-supporting MTR® A beam on the pillars
- Assembly of the slab:
- Positioning of the lattice beams or precompressed prefabricated beams
- Positioning of the brick blocks
- LIGHTENED SLAB:
- Positioning of the prefabricated trussed beams
- Positioning of the expanded polystyrene (EPS) lightening blocks
- PREDALLE SYSTEM FLOOR:
- Positioning of predalles slabs
- HOLLOW CORE SLAB:
- Positioning of hollow core panels
- Assembly of the upper and lower reinforcements within the MTR® A beams
- Assembly of the slab bars
- Concrete casting
TREATMENT OF THE BOTTOM PLATE
This treatment is used to protect the steel and to create a surface ready to be plastered. The non-structural laminations for upstand and downstand beams are also treated with the same technique.
The bottom plate of the MTR® A beam is always treated with anti-rust primer on both sides and gripping resin for plaster only on the rough part to be plastered.
TREATMENT AND FINISHES
Primer + gripping resin
Use of MTR® C beams – MTR® T beams with suitable lower concrete cover – MTR® A beams native fire resistant (R) with additional side steel rods or with bottom base treated with intumescent paints, fireproof plasterboards and coatings.
MTR® A beams, on request with bottom plate and lateral containment laminations.
In the cases in which painting is required, such as in presence of predalles slabs or false ceilings, the treatment provided for is limited to the anti-rust primer.
The downstand MTR® A beam receives the same treatments as the slab-thickness MTR® A beam: the plate as well as the sides remain rough and therefore need a treatment with primer and possibly with gripping resin.
The bottom plate of the upstand MTR® A beam receives the same treatment as the hidden beam (only primer or primer + gripping resin), whereas the upstand sides are usually treated only with primer, for they will be protected by outer sheath once the work is done.
- Downstand beam typology, complete with metal formwork for the downstand, representing a valid alternative to the prefabricated and the reinforced concrete solution; solution for wide spans allowing the use of the upper slabs as offices, accommodations, or simple coverings.
- Upstand beam typology, complete with metal formwork for the upstand, representing a valid alternative to the prefabricated solution, solution for wide spans allowing the use of the whole useful internal height.
- Hidden beam typology, complete with metal formwork for edge beams only, used for any purpose, such as residential, industrial, commercial and leisure buildings.
- Customised, arch-shaped typology, with pitch, with double pitch, offering unlimited possibilities to satisfy any type of architectural requirement.
Download reports/matching sheets
- MTR® A beams with predalles slabs
- MTR® A beams with lattice girders and EPS lightening slab.
- MTR® A beams with lattice girders and hollow clay bricks lightening slab
- MTR® A beams with Plastbau slab
- MTR® A and MTR® T beams with predalles slab
- MTR® A and MTR® T beams with lattice girders and hollow clay bricks lightening slab
In order to download the files, please fill out the form below. Once submitted, the links will be automatically activated.
The MTR® System beams rest on the vertical load-bearing elements, pillars and walls, through a specific support system which is welded at the ends of the beams and custom-made, in order to both bear the first-phase loads and avoid interference with the starter bars. The connection of the MTR® System elements with the adjacent load-bearing elements, such as continuous beams, pillars and walls, is achieved by adding reinforcing bar through the structural joints.
Once the concrete is cured, the MTR® System elements are steel-concrete composite structures, but the beam to column connection is, from a bending point of view, a full-fledged ordinary reinforced concrete section. The design of the beam to column connection provides the structure with a dissipative and ductile behaviour in compliance with the resistances hierarchy criterion.
The MTR® Beams rest on masonry or pillars through specific systems placed at their ends.
MTR® Beams are supplied to the site equipped with junction continuity reinforcing bars.
The assembly of the MTR® System on site is easy and fast and does not require the use of specialised workmanship.
Each delivery is accompanied by assembly diagrams for the installation of the MTR® Beams and the relative additional reinforcement.
The additional continuity reinforcement for the construction of the junctions to connect the beams to the pillars is supplied with the junctions packaged one by one and provided with identification tag indicating its exact position.
CERTIFIED CALCULATION APPLICATION
Software calculation application dedicated to the design of MTR® beams and implemented on the specific production process adopted by Metal.Ri.