Silos and Silage in Colorado. 
39 
forms are raised. The spacers are raised and kept above concrete 
as the forms are filled. 
Before the outside form is raised it is well to set the spacers to 
determine whether or not the reinforcing has been tied the right 
length. If the reinforcing is drawn tight when the spacers are set 
at intervals of 2*4 feet, it is the proper length. 
Cut VII. 
Raising the Outside Form .—A hole may be punched through 
the sheet iron of the outside form about one inch from the upper 
