Research and Development
New products require large investments
Committed to good engineering practices, based on current technical standards, MODULAR | BR continually conducts studies to improve its products. These studies require years of development, involving numerous numerical simulations and full-scale experimental tests.
Only after this long development process does MODULAR | BR make a quality, reliable and structurally safe product available to the market.
The research is carried out by the team of engineers at MODULAR | BR, all with a master's degree in structural engineering in partnership with a renowned Brazilian university.
Purlin System
Connections and calculation parameters
Through numerical and experimental analysis, the behavior of the connections of the Modular purlin system was studied, proving the theoretical analysis developed.
Parameters for the correct dimensioning of ZAE® profiles were only possible to obtain through experimental analysis.
With the values obtained in the analyses, the system calculation procedure can be updated, allowing the Modular purlin system to be elevated to a differentiated product level in the Brazilian market.
Structural behavior of purlins and metal tiles
In partnership with a renowned Brazilian university, experimental tests were carried out with the aim of evaluating the structural behavior and capacity of cold-formed Z-profile steel purlins and the metal tiles fixed to their compressed table.
The study generated a technical report, which presents conclusions that meet the requirements of the versions of the American standard AISI:2007 and higher, the Australian standard AZ/NZ 4600:2012 and the Brazilian standard NBR 14762:2010.
The procedures presented in the specifications prior to the AISI:2007 standard applied in the calculation of profiles with the geometry and dimensions currently used and more resistant steels lead to resistance values against safety.
The metal tile fixed to the compressed table of the purlin can contribute to lateral bracing, offering an increase in resistance to global buckling, although this contribution can only be quantified through experimental tests.
On the other hand, the presence of the metal tile, whatever it may be, fixed to the compressed table has little influence on the resistance to distortional buckling and as this ultimate limit state is generally the preponderant one, the metal tile fixed to the compressed table of the purlin does not prevent distortional buckling.
Since the tile does not influence the increase in resistance to distortional buckling when fixed to the compressed table, new tests with the tensioned table connected to the tile and the free compressed table are not justified.
Distortional Instability
Distortional instability began to be addressed more directly in 2007 in the American standard (AISI), where it was necessary to correct the formulations taking into account numerous experimental tests with the profiles and steels currently used. The procedures presented in the specifications prior to the AISI:2007 standard applied to the calculation of purlins with the geometry and dimensions currently used lead to resistance values against safety.
Programs such as CFS® (Cold-Formed Steel Design Software), available free of charge on the internet, allow you to calculate the resistance of a given profile, specifying the AISI:2007 standard, as well as previous or later versions.
Modular Deck
Approval and Research
MODULAR DECK steel forms are the result of extensive research, analysis and testing carried out by qualified professionals with postgraduate degrees in metal structures in conjunction with the structures department of one of the largest federal universities in Brazil under the supervision of a renowned professor with a PhD in the area of structures.
