Interior door manufacturers directory includes comprehensive cad drawings, BIM families, and csi 3 part Door specs. Additional content; residential door install videos, cad details on bi-fold doors that contribute to LEED credits, e-Catalogs and Arcat's patented SpecWizard® for accurately creating csi 3-part interior door specifications quickly and easily. Arcat content is free to all architects, spec writers and builders that need to select doors for projects.