MTR® T BEAM
Lightweight Precast Systems
for the traditional
The solution that replaces the traditional concrete steel with improved adhesion property to assembly on site: a lightweight prefabricated construction system that can be combined with traditional building systems. It is the ideal solution for residential buildings.
The MTR® T Beam is not self-supporting and must be placed on a formwork or on the slab of predalle floors. The MTR® T Beam can be used to make slim floor beams where it is not possible for the ordinary reinforced concrete.
The MTR®T Beam has the CE Marking according to the UNI EN 1090-1:2012. It consists of one or more lattice girders made of metallic steel, which are assembled together. The distance between axes is from 15 to 25 cm : each girder consists of two top chords and two bottom chords; these are linked by a central web possibly provided with additional diagonal end , to be completed on site by casting it with collaborating concrete .
The MTR® T beams can be combined with any type of floor and vertical structure since standard dimensions do not govern their production. They can be used in the building sectors where the self-supporting feature is not indispensable
MTR®T BEAM assembly process
For floors made of clay bricks and concrete:
• Placement of prefabricated or prestressed lattice girders
• Placement of hollow clay bricks
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For lightweight floors:
• Placement of prefabricated lattice girders
• Placement of expanded polystyrene (eps) lightweight blocks
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For floors made of slabs (predalle):
• Placement of slabs
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2. Placement of the mtr® t beam
3. Assembly of the top and bottom additional bars within the beams
4. Assembly of the top and bottom additional bars within the beams
5. Concrete casting
6. Waiting times for concrete maturity
THE BEAMS ARE EASY TO ASSEMBLE AND THEY ACHIEVE GOOD PERFORMANCE IN A SINGLE MOVE: FROM THE STORAGE AREA DIRECTLY ON THE WOODEN FORMWORK OR ON THE PREDALLE SLABS
It is made of structure steel according to the EN ISO 10025-2 standard.
Class C25/30, unless otherwise indicated.
Continuous wire welding with shielding gas (Process UNI EN ISO 4063-135) according to the NTC of 2008.
Paragraph no. 4.2 of the NTC of 2008 and Eurocodes 2 and 4. For the structures built in seismic zones, we refer to the chapter no. 7 of the NTC 2008 and to the Eurocode 8.
Engineering Design Process
Our engineers follow the calculation procedure of the Software MTR® according to the existing law.
Post-Fire mechanical properties (R)
It depends on the bottom concrete cover or on the thickness of the predalle slabs where it lays on
SUPPORT SYSTEMS AND STRUCTURAL JOINTS
The beams of the MTR® System lie on vertical supporting elements, columns and walls by an appropriate support system which is welded at the end of beams. It is custom-made in order to avoid interference with the starter rebars.
The b450c steel bars for reinforced concrete allows making structural joints that connect the elements of the MTR® System with the adjoining supporting elements, such as continuous beams, partition walls and columns.
After concrete maturity, the elements of the MTR® system are considered as composite steel and concrete structures, but the section where the beam anchors to the column is a section made of normal concrete, from a bending point of view. The design of the beam-to-column joints assures the necessary dissipative and ductile behavior while following the criteria of capacity design.
How a beam is supported
The MTR® Beams are supported by walls or columns through the specific end-anchored systems.
The MTR® Beams are delivered to the site with the structural column-to-beam connectors. They are made of concrete reinforcing steel B450C.
The buildings made of MTR® T Beams have floors with completely flat intrados.
Mixed structure with lots of advantages against the traditional reinforced concrete buildings
Easy to handle and certainty about the quantity of reinforcement steel used.
The advantages of the MTR® T Beams
Reduction of floor building times of 50%.
Reduction of the number of columns and their sections
Reduction of height and width beam sections
Reduction of column buckling
Reduction of the concrete used for beams
Fire resistance without extra costs and additional work