<http://schema.org/keywords>
"Constructive Court, court facade, roof, mezzanine, slab, stair, reservoir, Mezzanine, Dach, Treppe, Platte, mezzanine, toiture, escaliers, dalle, mezanino, telhado, escadas, lajes"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bibliocad.com/library/rafters-and-beams-in-facade-of-university-gymasium-building_65663>