http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31472640rafter roofs http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31472640 roofs by construction BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31472640 truss and beam roofs RT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31472640 double-framed roofs NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31472640 single-framed roofs NT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31472640 rafter roof UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31472640 roofs, rafter UF