CEILING STRUCTURE FOR CLEAN ROOM ETC.

摘要

PROBLEM TO BE SOLVED: To provide a ceiling structure for a clean room or the like forming a latticed portion for placing FFUs or ceiling panels by easily determining the mounting position of a joint member, and accurately joining a main ceiling rail and an auxiliary ceiling rail to each other in predetermined positions. SOLUTION: A positioning projection 38 is formed on the outer surface of the vertical base part 30 of the main ceiling rail 1 along the main ceiling rail 1 and a cutout 39 enabling the joint member 10 to be engaged therein is formed in a predetermined position of the positioning projection 38. The joint member 10 engaged in the cutout 39 is laid across the main ceiling rail 1 and the auxiliary ceiling rail 2 and fixed thereto with fixing screws 51 to 53 to join the main ceiling rail 1 with the auxiliary ceiling rail 2.