. Concrete silos; their advantages. Silos; Concrete construction. 42 Concrete Silos of wood is such that it shrinks when dry and swells when wet. The permanency of a wood stave silo depends entirely upon its maintaining a constant rigidity of structure. It consists of staves set on end, held firmly in place by hoops. As long as the hoops remain tight the structure will be comparative- ly rigid and stable. As soon as the hoops become loose, it be- comes in the highest degree unstable. In the modern wood stave silo the staves are matched and fit- ted together by tongue and groove. The tongue and
. Concrete silos; their advantages. Silos; Concrete construction. 42 Concrete Silos of wood is such that it shrinks when dry and swells when wet. The permanency of a wood stave silo depends entirely upon its maintaining a constant rigidity of structure. It consists of staves set on end, held firmly in place by hoops. As long as the hoops remain tight the structure will be comparative- ly rigid and stable. As soon as the hoops become loose, it be- comes in the highest degree unstable. In the modern wood stave silo the staves are matched and fit- ted together by tongue and groove. The tongue and groove are from % to % inch in depth. The extreme circum- ference of a silo 16 feet in diameter is about 50 feet. It would take very little shrinking to reduce this 50 feet sufficiently to separate a tongue from a groove. Then, unless some method is adopted for holding the stave in place, the stave Avill fall out and the silo be in imminent danger of collapse. If the hoops become loose so as to destroy the rigidity of the structure, it may be worked in any direction by every light wind. A single half day of hot weather is sometimes sufficient to shrink the staves on such a silo to such an extent that every hoop will need to be tightened. Effect of Shrinkage of Wood Staves. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hanson, Edward Smith, 1871- [from old catalog]. Chicago, The Cement era publishing company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectconcreteconstruction
