666 



Journal of Agriculture. 



[ii Oct., 1909. 



The Roof. — Fix two purlins for ridge 20 feet long to the centre 

 24-ft. roof studs, the top of studs being checked i inch on each edge for 

 purlins, and purlins bolted to studs with 6i-in. x |-in. bolts, one to eacft 

 stud. These purlins to project in order to attach block and tackle. _ 

 Secure in a similar manner, with 5j-in. x |-in. bolts, purlins to the third 

 studs each side of ridge studs, which are 24 feet high as directed, and 

 bottom purlins to ordinary length studs — the sixth on each side of ridge 

 studs. The centre purlins are fixed to suit the pitch given by the ridge 



Scale of feci 



^mL- Elevator Jbr- 60 ton lih iimUar- 

 in Ev^fy detai.1, hu.t 30 feet iono 



21 t 



SlDL LUVATIUN 



fROnT 



ELEVATOR FOR lOO-TON SILO. 



Studs and the excess lengtii cut off. Cover with 9-ft. sheets of 26-gauge 

 corrugated galvanized iron, allowing a lap of one and a half corrugations, 

 with 2|-in. spring-head nails at every third corrugation. Fix three lengths 

 of 14-in. galvanized ridging with spring-head nails every 2 feet. Fix 

 four 3-in. X I -in. hardwood battens from studs to ends of bottom purlins 

 for supports. 



