450 AGRICULTURAL ENGINEERING 



3. Describe the construction of a plank-frame barn with purlins 



4. Describe the construction of the Wing joist frame. 



5. Describe the construction of the Shawver plank frame. 



6. What are the principal advantages and disadvantages of a steel 

 barn frame? 



7. What are the objections to a round barn, and its principal 

 advantages? 



8. Describe the usual method of framing a round bam. 



