PURPOSE BARNS 



struction is too expensive and large timbers are difficult to 

 secure at the local lumber yards. Two inches is the thickest 

 material used in plank frame type of construction. It is a 

 distinct advantage to use the plank frame type of construc- 

 tion for it saves in the cost of lumber, is more easily handled, 

 takes less time to construct, and requires less skilled labor in 

 framing the barn. 



Either horizontal or vertical siding can be used. Drop 

 siding or shiplap is ordinarily used for horizontal siding and 

 ixio-inch boards with three-inch battens placed over the 

 cracks for vertical siding. It is best to ceil the inside of the 

 basement with flooring or ceiling. 



More Hay Room Under a Gambrel Roof. 



There are two general types of barn roofs, the gable and 

 gambrel. Many times the latter is called incorrectly the 

 "hip" roof. The advantage of the gambrel over the gable 

 roof is that increased hay room can be secured without build- 

 ing the barn any higher either at the plate or ridge. 



The height of the gambrel roof should be equal to the 

 width of half the building. The first rafter should have a 

 rise of one-third the width of the building and a run of one- 

 sixth. The second should have 

 a run of one-third the width of 

 the building and a rise of one- 

 sixth. Then in the case of a 

 36-foot barn the lower rafter 

 would have a rise of 12 feet and 

 a run of 6 feet, the second rafter 

 a run of 12 feet and a rise of 6 

 feet. 



End Brace Adds Strength. 



The end brace shown 

 in Figure 16 is designed to pre- 

 vent any end racking of the 

 barn as well as to prevent the 

 end of the barn from springing. 

 Many plank frame barns con- 

 structed without this brace are 

 likely to spring out at the end, 

 in some instances as far as from two to six inches. As there 

 is no other truss work or ties bracing the end of the barn, it 



Twenty -three 



Fig. 15. Gambrel and Gable Roofs. 



The hay mow is increased in size 

 in a gambrel roof barn without 

 increasing the height of the roof 

 at the plate or ridge. 



