Although the presented proposals of indirect connections between the panels with the metallic profiles and the establishment of a window / door panel were consistent and possibly viable, it would be necessary the development of a constructive technique different from that used by specialized construction companies in this constructive system in Brazil. The constructive techniques used by these construction companies for the production of dwellings in LWF were recognized by the responsible authority of projects approval from Brazil, through a legal process. Any different technique needs official recognition of its use viability in the production of houses in the country. In the present study context, the proposal would demand human, material and financial resources for its recognition, which could hamper the continuity of the project. Thus, it was defined as a guideline the use of the constructive practices adopted by construction companies specialising in the LWF building system in the country. Windows in commercial dimensions started being considered in product design instead of window panels. Arrangements of studs as recommended in the manuals consulted for constructions in the LWF were adopted for tying the wall panels at corners and partitions intersections. The three-dimensional virtual modelling of the product, with all the panels’ components, showed other significant problems of the system relative to the high waste rate. The panel sheathing boards cutoff in the opening areas, create a wide variety of boards formats. This happens due to the need of displacement that creates different cuts in each of the openings of the dwelling due to its positioning( Figure 8).
Figure 8: Variations of panel’ s shapes and dimensions
From the virtual prototype it was possible to quantify a number of entire and cut boards, which enable to quantify the amount of material waste. The material applied in the walls panels was calculated considering the cutoffs of each board variation. The waste resulted from the difference
342 ZEMCH 2015 | International Conference | Bari- Lecce, Italy