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MiscSystems - Miscellaneous Systems 2008 Page 1 ROBUST...

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Miscellaneous Systems 2008 Page 1 ROBUST BUILDING SYSTEM Robust Building Systems of Plantation, Florida, has patented its low-cost, hurricane and earthquake resistant home building system that can be packaged for rapid deployment and erection to disaster areas for recovery relief or to developing nations as permanent housing. The Robust System is a total building system but relies on the local market Development of the Robust System was a collaborative effort of several companies: Robust Building Systems, Dorbyl Limited, Alpine Engineered Products, HH Robertson, US Brick & Block Systems. Construction Process With two power tools and conventional hand tools, three workers can erect a 583 sq. ft. house in about 10 days. The process begins with the setting of the four corner posts. Footer trenches are dug, intermediate posts are installed at 10-foot intervals, tie beams are placed around the top of the wall, and steel trusses are positioned over the posts. Expanded metal mesh panels are suspended from the tie beam and extend down into the footer trench. Rebar is placed horizontally in the footer trench. Vertical rebar is installed in the footer trench and extends up the wall about two feet. Window and door opening outlines are marked on the expanded metal panels. Piano wire is stretched between pre- installed guide screws and runs from corner-post to corner-post near the bottom and at mid-height of the wall panels. The piano wire stablizes the mesh wall panels and serves as a screed guide for the shotcrete that will be applied. .
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Miscellaneous Systems 2008 Page 2 Shotcrete is applied both the inside and the outside of the wall and in the footer at the same time. The total completed wall thickness is 4.5 inches. The shotcrete is smoothed and window and door openings are cleared. As shown below, plumbing and electrical services are installed before the shotcrete is applied. Notice that the floor slab has not been placed and yet the wall has shotcrete applied. After the shotcrete has been applied to the walls, the floor slab is placed and rests on top of the footer.
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Miscellaneous Systems 2008 Page 3 Once the wall has set, trusses are installed at 5-foot intervals and covered with a steel roofing system and aluminum soffit is installed. A typical finished building appears as shown below. The interior walls finish can remain as shotcrete or be covered with drywall or other paneling. Windows, doors, plumbing fixtures, electrical fixtures, etc. are not part of the Robust Building System package and should be purchased on the local market. The 583 sq. ft. structure shown can be built for about $15,000 in materials and labor. The finished system shown is approved for construction under the South Florida Building Code. It has passed the impact test of a 9 lb. 2x4 shot at 30 mph against the wall. After three impacts, the only damage was scratched exterior paint.
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