BULLETIN No. 143 



[February, 



silo ; 4x45 cut to a circle placed on top of these supports. The out- 

 side span, over cows, is 13 feet 6 inches; middle span, over feed 

 alley, 6 feet 8 inches, and inside span, over cows, 13 feet. 



Joists, 2x8s placed 3 feet apart at studs on outside wall. There 

 are as many joists in center of barn as at the outside. 



Supports, second-story, consist of one row of posts running 

 around at a point immediately under the break in the roof. These 

 are 16 feet apart and are made of three 2x8s kept 2 inches apart 

 by horizontal braces which run from studding near the eave thru 

 these posts to studding in silo. See Fig. 31. 



Plate, rafter is set on top of each stud, and no plate is used. 



Rafters, 2x6s resting on studs at outside and on circular plate 

 at break in roof. 



FIG. 30. BARN No. 4, 90 FEET IN DIAMETER; ONE OF THE FEW DAIRY BARNS WITH 

 SUFFICIENT LIGHT; SAME SCALE AS DRAWING ON PAGE 37. 



