There are two kinds of corner beads used on buildings; A, those which are put up before plastering, and B, those which are nailed to a projecting angle outside of the plastering. The latter kind are including in the interior finish, and will be described under the name of angle beads,
The corner bead proper is really a ground for a projecting angle, as it forms a guide for the plasterer as well as affording a solid corner. The common sections of wooden corner beads and those usually carried in stock are the first two shown in Fig. 193. A much better section is in that shown at 2?, as it holds the plaster and prevents its crumbling at the edges. It is also about the only section that can be successfully applied to a brick corner. It may be made either 7/8 inch or 1 1/8 inches thick, the latter thickness being best when the bead is to be used on brickwork.
The use of corner beads varies in different localities , in the New England States they are quite generally used, while they appear to be seldom if ever used in the far Western States. They afford, however, the best protection for a projecting angle, and the author believes that it would be better if they were more generally used. The beads should be made of white pine, and should be perfectly straight and plumb.
Fig. 193. - Corner Beads.