A sealable ceiling assembly is provided for use in applications such as clean rooms. The sealable ceiling assembly may include main beams suspended from a support ceiling parallel to each other and cross beams that run perpendicular to the main beams to attach the main beams together. Each cross beam...http://www.google.fr/patents/US7260919?utm_source=gb-gplus-shareBrevet US7260919 - Sealable ceiling assembly
