zilian perception of value ; ( 4 ) there are no restrictions of use compared to conventional masonry ( fixing shelves , using water to wash the house , internal and external cladding ); ( 5 ) potential for cost reduction due : to the gain in scale and rate of construction , allowing an execution time much smaller than the conventional building system ; to the prefabricated walls provided by the plant , including electrical systems , hydraulics and windows ; to the less likely delays due to weather ; and to the greater control of labor ; ( 6 ) the system has a lower environmental impact , adopts renewable materials and causes a 85 % waste reduction on the site construction . ( Tecverde 2015 ) The partner company built on the university campus one pilot HU ( Housing Unit ). Some important conclusions were drawn : ( 1 ) despite the panel erection speed ( 6 hours ), the finishing proved to be much slower , because of the traditional techniques applied , especially the ceramic tile wall and floor finishing ; ( 2 ) although the trusses were prefabricated , roofing was considerably slow because ceramic tile laying was also made handcrafted . Because of the mentioned observations , it was decided that the design would be developed from two premises : ( 1 ) to establish a precast sanitary module that includes hydraulic-structured wall for the kitchen ; ( 2 ) a prefab and quick assembling alternative for roofing . These guidelines became the directives to the architectural design . ( Figure 3 )
Figure 3 : Generating lines to the architectural design
4.2 Plot dimensions and land division In the earlier workshops , important guidelines regarding implementation have been established . The instruments to capture the user perception were a key point for the development of the design : the preference for detached homes rather than semi-detached ones . Factors such as greater privacy and sound insulation were important as well as the desire for identity . Residents had a perception that a detached unit is equivalent to “ half house ”. In addition , during the workshop with experts , it was found that , particularly in terms of fire security , semi-detached homes would be advisable . The workshop with the local housing council team was fundamental to the definition of the land configuration . Brazilian law establishes 125.00m2 as a minimum plot of land for LIH . Based on POE , it was found that this area has been insufficient to allow future expansion and to ensure the desired of privacy , especially when the plot is narrow . At the workshop , the team announced that the future policy would be to broaden the minimum land area of 150.00m2 This area was adopted as a reference to the design in this research .
552 ZEMCH 2015 | International Conference | Bari - Lecce , Italy