Simple, robust timber-frame construction with columns of rough-sawn fir Profiled redwood boards Maintenance-free because impregnation was unnecessary Roof overhang inadvisable owing to constant strong winds All beams connected through side or placed on top of support Bracing diagonals for wind and seismic loads made from 4" x 4" (102 x 102 mm) squared timber sections connected with quarter-circle metal plates left exposed Intensive weather-induced colour changes No requirements regarding winter thermal performance