ZEMCH 2015 - International Conference Proceedings | Page 553

Table 5: Summary of preliminary meetings held by the ZEMCH Brazil research group
Focus

Research Groups

Scope

Date

First Charrette

All Researchers from ZEMCH
Brazil

Establishment of goals and targets to be met for the
process design of housing units, developed by the
research ZEMCH Brazil.

Aug/2013

Design

Project Coordination
Presentation of the preliminary study (initial version)
Researchers from ZEMCH Brazil and first considerations of options for customization
p roposal, based on the POE (preliminary results).

Oct/2013

Builder

Collaborator builder

Guidance on Housing Projects in Londrina, from the
design phase to the post-occupation.

Nov/2013

Housing
Company

Professionals in the Project Area General guidelines for the development of social
from COHAB-LD
housing in the region of Londrina-PR, considering
regulatory standards, available subsidies, projective
restrictions, regional demands, among others.

Nov/2013

Cost

Researchers - Team Cost ZEMCH Preliminary Results of the cost analysis based on the
Brazil
case study of mass customization - Case Study of Aragão
(2014).

Nov/2013

Energy Efficiency Expert in the field of Energy
Efficiency

Presentation of profiles of case study families regarding
Solar Heating System use (SAS) and instructions for use.

Nov/2013

Value

Professional Social Assistant of
COHAB-LD

Presentation of cultural profile of the families benefiting
from the PMCMV, the research focus.

Nov/2013

Value

Researchers - Team Value
ZEMCH Brazil

Results of profiles of Families - POE, and results of the
application of ”Card Game”

Nov/2013

Source: Yokota 2015
In this sense, from the first preliminary draft, it was assumed that a house built in partially prefabricated wood framing system could contain a third 8,50m2 bedroom and maintain the same cost
as a conventional construction.
The preliminary draft aimed to assess the feasibility of the product and provide guidance to the
design, based on the demands identified in the phase of capture of the user value perceptions.
Multidisciplinary teams of designers from all disciplines carried out in this phase. The cooperation
the experience and expertise of the professionals (a builder operating in the PMCMV context and
of the Local Housing Council (COHAB-LD) was key to share technical knowledge.
The cost analysis of a PMCMV indicated that from a total of US $ 21,000.00 unit cost, about 48%
is used for urban infrastructure, leaving approximately US$ 10,900.00 for the construction of the
housing unit itself, which constitutes the allowable cost (Aragão 2014).
From the preliminary draft, including the third bedroom, we have come up with a budget of US$
11.850,00 using the references provided by the wood frame partner company. This figure about
US$ 1,000.00 above the allowable cost was considered promising, indicating a strong possibility
to keep the target costing to PMCMV through the adoption of rational solutions to economy and
efficiency. These initial data show that while a conventional construction costs US $ 279.00 / m2,
a pre-fab wood frame paneled home can be constructed for US $ 227.00 / m2, which represents a
18% reduction cost. On the other hand, the floor area increases almost 20%.
4.1 Building system
From the beginning, the choice of wood-frame prefab building system was guided by the following main reasons: (1) The technology is already approved by the government agencies responsible for social housing provision in Brazil and meets the technical requirements, including
the performance ones; (2) a partnership with a company with know-how of wood-frame homes,
including Low-income housing (LIH) was established; (3) the walls do not differ aesthetically from
conventional masonry, both externally and internally, facilitating adaptation to culture and Bra-

A design process proposal to brazilian Government’s social housing program

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