Macdonald Architecture & Technology provides project design, project management, and construction supervision for all building types, with an emphasis on sustainable building, green materials, energy efficiency and environmentally responsible design. Angus Macdonald has developed a structural geometry that combines galvanized steel profiles with Ferrocement matrices to create extremely strong building structures using about 20% of the steel & cement required for reinforced concrete & masonry buildings. This savings reduces cost and construction time. This means that buildings built this way have a Carbon footprint of about 20% of reinforced concrete & masonry structures. Their strength to weight ratio is about 6 x that of reinforced concrete structures. This makes them both affordable and sustainable; a life-saving structural type when applied in regions subject to hurricanes, earthquakes, floods or fire.