OCTAGONAL SILO. 73 



out to make the door space larger, the remaining ones should 

 be correspondingly reinforced. 



The making of a roof for such a. silo is a simple matter, and 

 a dormer window will assist in filling, although a trap door may 

 be used in case the filling be done with a blower. Any style 

 of siding may be used. 



Such a silo if well built will be durable, satisfactory, have 

 nearly all the advantages of a round silo, and in addition will 

 be a much more stable structure, requiring no tightening of 

 the hoops from time to time. 



Bills of material for a silo built to 21-foot circle and 30 feet 

 high are given below. The cost will, of course, vary with the 

 locality. 



Bills of materials for Octagonal Silo 20x30 feet outside meas- 

 urement: 



Foundation 10 perches 



Girts 110 feet 3x8 \ ■ 8 or 16 foot 



900 feet 2x8 J lengths. 



Rafters 230 feet 2x4x14 feet 



Siding 2500 feet 



Lining 2800 feet 1%-inch thick, matched 



Dormer Window 



Nails and spikes 300 lbs. 



Shingles , 4 M 



Paint 6 gallons 



The "Ballard" silo is a lumber silo of the octagonal type, de- 

 signed to be built of material that csaa be found in any retail 

 lumber yard. It is one of the contributions of the Plan Book 

 Department of the Western Retail Lumbermen's Association, of 

 Spokane, Washington, for the benefit of the customers of its 

 members; and its success has brought about its introduction 

 into a very extended territory. 



Its features are its low cost, both in material and labor; 

 its strength and rigidity; and the simple method of adapting 

 its construction to meet the varying climatic conditions of widely 

 separated localities. No skilled labor is required, no patented 

 materials are used, and the shape and details of construction 



