FARM BUILDINGS 349 



other farm buildings, and the amount of money available 

 for the initial cost. 



GRANARIES 



The chief characteristics of a good granary are strength of 

 floors and walls and provision for keeping out mice and rats. 

 The supports or joists may be provided for as any beam is 

 designed. The load on side walls may be determined by the 

 following formula: 



LX-XGX- 



in which L is the length of the side wall, H, the height of the 

 wall, and G, the weight of a cubic foot of the grain to be 

 contained. A cubic foot contains approximately % bushel. 

 One bushel occupies approximately \% cubic feet of space. 

 The size of the granary may be figured from the maximum 

 quantity that it is desired to store. It is, many times, 

 convenient to provide a hopper bottom in grain bins. While 

 this is an added expense, it may be desirable. The mini- 

 mum slope is 2^ feet rise in 8 feet run. In a country where 

 corn is one of the leading crops, the granary may be com- 

 bined with a double crib as illustrated in Figure 277. 



CORN CRIBS 



The width of the corn crib is determined by the penetration 

 and cooling effect of the outside atmosphere. Five to nine feet 

 is standard practice. The height is usually 10 feet, although 

 it may be higher if conveniences are at hand for elevating the 

 corn. One bushel of ear corn occupies about 2% cubic feet. 

 Where any considerable quantity of corn is raised, the double 

 crib is generally given preference over the single. The over- 

 head granary is an added advantage in this type. Nine feet 

 is a good width for the driveway and serves admirably for 

 the housing of wagons and buggies. If it is desired to accom- 

 modate special machinery, a greater width may be provided. 

 Arrangement must be made for dumping machinery; an 



