"The X-100 is a steel structure, single-family residence built by developer Eichler Homes in 1956 to designs by the architectural team Jones & Emmons in the style Modern Movement, Midcentury Modern. Its setting, in the San Mateo hills with expansive views, retains much of its integrity. All structural elements -- posts and roof beams -- are steel beams and are exposed inside and out. No interior walls are structural. The structural system, devised with the aid of structural engineer William R. Mason, C.E., allows for an expansive open plan. Skylights add to the open feeling and allow for two indoor gardens. The steel decking that makes up the roof is exposed on the interior. Rear walls opening to expansive views are entirely glass, framed in steel. Indoor-outdoor connections are emphasized by continuity of materials, concrete paving pads inside and out, connection to outdoor gardens from every room, and indoor gardens. The house retains the “experimental features” that gave it its name, as it was designed to investigate new ideas for homes, incorporating new materials, technological advances, and innovative laborsaving devices. The X-100 looks much as it did when new thanks to careful preservation by its three owners and to sensitive restoration in the last decade. The landscape design too is almost entirely intact. The setting too remains original. It sits in a neighborhood of Eichler homes and backs up to open space." (
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