Partition wall

Abstract

To provide a partition wall that includes as small a number as possible of fireresistant coverings to have good workability and effectively prevents a leak of heated air through lateral joints to have a good fire resistance capability. The partition wall 100 includes the wall studs 10, and the first wall 30A and the second wall 30B, which are a pair of walls provided across the wall studs 10 from each other and are formed of the vertically and laterally arranged gypsum boards 20. Each of the first wall 30A and the second wall 30B is a single-layer wall of the gypsum boards 20. The vertical joints 60 and the lateral joints 70 are formed in the first wall 30A and the second wall 30B. The wall studs 10 are on the back side of the vertical joints 60. The joint base member 40 having a fire blocking capability is provided at the lateral joints 70. The joint base member 40 has a Tletter cross-sectional shape, and includes the back pieces 41 and the projecting piece 42 projecting in the thickness direction of the gypsum boards 20. The gypsum boards 20, the joint base member 40, and the wall studs 10 are not screwed with common screws 50.