52 
CONCRETE SILOS 
Building the Concrete Silo 
Where the services of reHable concrete silo contractors can be ob- 
tained, it is generally advantageous to have the silo built under contract. 
Contract '^^^ cost of silos built in this manner is generally no more than 
Work otherwise, when quality of the work, convenience and time are 
considered. The advantages of good system, competent over- 
seeing and general experience in the work justifies a greater cash outlay 
than is needed for home-made silos, although in a great many cases the 
actual expense of a silo built under contract is no greater than if built 
by the owner. If it is desired to put up the silo during a time of year 
when work is over-plentiful or farm labor scarce, building the silo under 
contract will solve the labor problem. Cement stave silos are built under 
contract exclusively, by lessees holding territory rights from the owners 
of the Play ford cement stave patent rights. 
Of 110 concrete silos recently inspected, 74 were built by contractors, 
9 by the owners under experienced foremen, and 27 by the owners without 
any assistance whatever. In over one-half of the cases where the silo was 
built under contract the owner furnished a part of the labor, and in about 
one-fifth of the cases the owners furnished the cement. Almost without 
exception, the owners of contract-built silos furnished the sand and gravel, 
for which they received credit on their accounts, at a stipulated rate. 
Concrete Roof constructed with Warford 's forms. Monolithic Concrete Silo in Process of Construc- 
Silo on George Harvey 's farm near Batavia, tion by students of South Dakota State College, 
Illinois. Brookings, South Dakota. 
