Greenhouses, their construction and equipment . l while it is soft, and project upward 2 or3 inches. These are used for fastening down 90 GREENHOUSES the sill, which is bored to fit over the postsand bolts and is secured with nuts. Noposts are set in the end walls, but the boltsare set the same as in the side walls and areused for the same some cases the posts areset in the ground and the sidewalls are constructed of twolayers of matched lumber. The purlin posts and othersupports are put in positionmuch the same as in the woodframe house, except that in-stead of being embedded incon
Greenhouses, their construction and equipment . l while it is soft, and project upward 2 or3 inches. These are used for fastening down 90 GREENHOUSES the sill, which is bored to fit over the postsand bolts and is secured with nuts. Noposts are set in the end walls, but the boltsare set the same as in the side walls and areused for the same some cases the posts areset in the ground and the sidewalls are constructed of twolayers of matched lumber. The purlin posts and othersupports are put in positionmuch the same as in the woodframe house, except that in-stead of being embedded inconcrete, they are sometimesprovided with foot pieces andrest on small concrete malleable iron castingsmay be had in almost everyconceivable form for joiningthe frame together. These arefastened by bolts and set screws, so that it isnot necessary to thread the pipe. The sashbars are fastened to the pipe purlins bymeans of U-shaped clips or pipe-straps,which are secured to the bars by means ofscrews. Purlins are usually made of one and. Fig. 51.—Struc-tural steel postwith boardwall FRAMEWORK 91 a quarter-inch pipe and should be supportedby posts every 8 feet. PurUn posts are usual-ly of one and a half-inch pipe and braces ofone and a quarter-inch pipe. A well-built house of this type, if wellcared for, should last a lifetime.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkorangejuddc
