Boom for Clinches 



145 



The second- story joists rest on stringers or 

 light girders 1x5 inches, as shown in Fig. 57. 

 If the girder is set flush with the inside of the 

 stud, A, the laths must lie directly upon the 

 face of the girt. This gi\:es no room for the- 

 mortar to form clinches behind the lath. This 

 5 -inch girder swells when the mortar is put on 

 and shrinks when it dries, which may result in 



Fig. 56. A wall strengthened by diagonal sheathing. 



a crack in the wall in the angle near A. Since, 

 by reason of faulty construction, there are no 

 clinches behind the lath, the plastering becomes 

 loosened, and this is likely to be the beginning 

 of serious trouble. If the girder is let in so 

 that its face is not flush with the inside of the 

 stud and then furrowed out with small pieces of 

 lath, the effects of the shrinking of the girder 

 will be obviated and room will be left for 

 clinches behind the lath. 



