Greenhouse construction : a complete manual on the building, heating, ventilating and arrangement of greenhouses, and the construction of hotbeds, frames and plant pits . )orting posts shouldbe about six feet apart, one for each purlin. When theposts would stand in the walk, if placed vertically, theymay be arranged as braces from the center posts, eitheras shown in Fig. 29 or in Fig. 60. If the ridge issupported there will be no danger of the walls spreading,even if diagonal braces are used. In one or two houses of recent construction theposts have been used as legs for the center bed, by ins
Greenhouse construction : a complete manual on the building, heating, ventilating and arrangement of greenhouses, and the construction of hotbeds, frames and plant pits . )orting posts shouldbe about six feet apart, one for each purlin. When theposts would stand in the walk, if placed vertically, theymay be arranged as braces from the center posts, eitheras shown in Fig. 29 or in Fig. 60. If the ridge issupported there will be no danger of the walls spreading,even if diagonal braces are used. In one or two houses of recent construction theposts have been used as legs for the center bed, by insert-ing tees, into which the cross bearers for the bed are. FIG. 29. IRON POSTS AKT> BRACES. screwed. The upper ends of these posts are fastened,by means of top castings, to wood or iron rafters, or bymeans of the tees previously mentioned to the pipe pur-lins. The lower end of the posts may be inserted intocedar blocks, or rest on masonry piers, either upon flatcastings (Fig. 14), or in beds of cement. When iron rafters are used, particularly if there is asolid shoulder at the eaves, or if the roof is strengthenedat that point by a strong angle bracket, there will be no 44 GEEENHOUSE CONSIRUCTION. necessity for supporting posts unless the liouse is verywide; but a truss rod, if necessary, may be nsed to keeptbe roof from crowding^ tlie walls out. CHAPTER VIII. IROX HOUSES. We have, thus far, only considered houses con-structed of wood, or partly of wood and iron, but, formany years houses built entirely of iron and glass havebeen used in Europe, and they are now frequently seenin this country. In favor of these houses it is claimedthat the
Size: 1917px × 1303px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidgreenhouseco, bookyear1894
