Air duct kit for security at building sites has channel wall running in angle in form of rectangular plates connected with slots running in longitudinal direction

摘要

Air duct kit consists of channel walls (14,16,18,20) running in angle in form of rectangular plates connected with slots (22,24) running in longitudinal direction. A spring element (26) is fixed with slots of adjacent wall section for the creation of channel section (12). Mounting device partly embraces channel section and strut against each other.