Abstract: Disclosed is a gypsum board having a kerfed edge along substantially the full length of at least one edge wherein the kerf has sidewalls inclined opposingly inwardly toward one another but do not intersect and are joined by a bottom surface of uneven profile characterized by alternately and irregularly spaced projections and depressions. The uneven bottom surface and each sidewall meet at a jagged intersection. Said kerfed edge provides enhanced strength in a direction perpendicular to the sidewalls providing improved board retention by flanged supports over that of conventional mechanically sawn kerfed edge boards. A process for providing kerfed edge gypsum board is also disclosed which comprises projecting into the board edge a first and second fine stream of aqueous liquid which incline toward one another at angles of incidence to a line perpendicular to the board edge which provides a combined angle therebetween of from about 3.degree. to about 20.degree..

Abstract: A relocatable wall mounting system is disclosed making use of a half-clip which, when mounted adjacent to a like half-clip at the abutting edges of wallboard panels, forms a spring clip attachment for engaging a slot in a support member to attach the panels to the support member. The half-clip has: a first shoulder section adaptable to be driven into the end of the wallboard panel; a base section extending from the shoulder section; a second shoulder section connected to the base section and extending in the direction of the end to be driven into the panel; and a curved spring arm extending outwardly and curving arcuately in the direction of the end to be driven into the panel.

Abstract: Disclosed is a gypsum wallboard panel having kerfing in opposing edges thereof which extends substantially the length of the edges but terminates prior to the corners of the panel a distance sufficient to prevent weakening of the corners of the panels.

Abstract: An improved ceiling runner and wall constructed therefrom wherein the exterior, decorative flange holding in place the wallboard of the wall is provided with means for removably engaging a decorative trim which may be added to alter the decorative appearance.

Abstract: A releasibly locking, accessible and demountable partition assembly featuring kerfed panels, stud members, and means for releasibly locking at least one panel to each stud member, the means including angle members and vertically-extending means on the stud permitting engagement and disengagement of the angle members anywhere along the height of the stud member.

Abstract: A corner construction is provided which utilizes a support having an elongated metallic flange, a back-up clip resiliently engaging the flange, and a pair of panels. One panel has a surface thereof engaging a first portion of the clip and is secured to the flange. The second panel has a surface thereof engaging a second portion of the clip and is secured thereto. An edge of the second panel is in abutting engagement with the first portion of the clip. The clip is concealed by the first and second panels which are arranged in angular relation.