Butt Joints. A plain joint of this kind is represented by Fig. 278. The joint may be concealed by a bead, as indicated by dotted lines; and when the material is thick and it is desirable to prevent an exposure of end grain as much as possible, the joint may be modified, as shown by Fig. 279. This form also may be beaded. When great strength is demande a housed joint may be made, Fig. 280. The sides and ends of troughs which are required to be water-tight, are frequently made in this way. If there can be no projection, as A, Fig. 280,this joint may be modified as shown by Fig. 281, but it will lose in strength.

Fig. 277

Fig.27 8

Fig.27 9

Fig.280

Fig. 281d

Fig. 282

Fig. 283

Fig. 284