Architect-lead Habitat Team Builds 5 Homes
How do you . . . volunteer your professional services to make a near-immediate difference for a community in need?
Summary: Mark Eric Benner, AIA, recently led an all-volunteer building team to Bogalusa, La., to construct five homes for Habitat for Humanity. Relying on the efficiencies enabled by BIM, Solid Rock Carpenters was able to erect the five needed homes in only seven days.
“The time it takes to build a Habitat home varies from place to place,” Benner explains. “They can get some done in a fairly regular schedule, but there are others that languish for years. That was the frustration [SRC] felt in the early years, where they went back year after year, worked on the same project, and made nominal progress.”
According to Benner, what enables the success of the SRC team is its advanced preparation and coordination. Prior to traveling to the site for the build days, 250 volunteers came together in the preceding months and weeks to precut, lay out, and build all the walls and building components, shrink-wrapping them into neat packages for on-site assembly.
Building on BIM
To maximize efficiencies, Benner believes that the use of the building information modeling (BIM) software was critical: “The ArchiCAD models enabled me to quickly and easily generate all the construction documents to be utilized by a largely unskilled workforce while also helping to coordinate material delivery and construction sequencing to speed up the process … Our ability to provide perspective visualization and shop-drawing-level detail enabled a largely-novice volunteer force to understand the components they were building and how they would eventually fit together when assembled.”
Although the homes necessarily share similarities to achieve efficiency, they are not identical. “These are simple homes, and the CAD portion of the project was primarily an effort of coordination and logistics,” Benner says. “As is typical, the benefits of computer-aided design and BIM are truly realized under conditions of change. Our production package comprised a variety of home configurations, including a three- and a four-bedroom package. The mix was in flux within one week of our production ‘build days,’ affecting our material quantities and destination locations. The powerful analysis tools allowed us the flexibility to respond to our changing production package.”
Clearly passionate about what they do, SRC raises considerable money to cover the cost of materials and shipping for Habitat projects. For the five new houses and the sixth completed from the June trip, SRC raised approximately $100,000, according to Benner. The necessary design and other professional services that would typically require additional funds are provided pro bono by qualified SRC volunteers, and volunteers pay their travel expenses to and from the construction site.
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