. Les fleuristes [microforme] examen. La floriculture. Le chevron de l'avant-toit de la colonne est en acier plat, à laquelle les trois pannes sont vissés et le bouchon vissé vitrage cypress. e 83 pieds de large. À partir de la colonne t6 la crête les chevrons sont fer double channel, entre lesquelles la télévision rafter est bouilli à l'endroit où il est fixé à la colonne. Le chevron vitrage cap est maintenu par deux vis placées à l'intervalle le toit. colonne est fixé à l'avant-toit par un tJje* "usset doubl acier plaque. Elle est rigidifiée par un truss allant de la plaque de jonction à la tave à celui de la colonne. À partir de la colonne

• Contributeur: Library Book Collection / Alamy Banque D'Images
• ID de l’image: RRRMRM
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• Dimensions: 1675 x 1491 px | 28,4 x 25,2 cm | 11,2 x 9,9 inches | 150dpi

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. Florists' review [microform]. Floriculture. The rafter from the eave to the column is flat steel, to which the three purlins are bolted and the cypress glazing cap screwed. e 83 Feet Wide. From the column t6 the ridge the rafters are double channel iron, between which the flat rafter is boiled at the point where it is secured to the column. The rafter glazing cap is held firmly by two screws placed at interval up the roof. column is secured to tJje eave by a doubl* steel «usset plate. It is stiffened by a truss running from the gusset plate at the tave to the one at the column. From the column to the ridge Ihe rafter is made of two channel irons, between which the flat iron rafter is joined at the I-shaped column by gusset plates. The trussing between the columns and ridge is made of double angle irons. Notice that the truss ties running from the columns to the struts do not go straight across, '^ut slant upward^ practically forming an arch. Every- ''ody knows that an arch is one of the oldest and strongest orms of construction. So strongly framed is this house, that if the rafters and side posts on each side of the columns were taken away al- 'oeethcr, that part of the house left would be •ntir«ly svlf- ?uttainins. As apparently simple as the construction is (now that it s all worked out and before your eyes), nevertheless it took e. [d , 11 r- UsmO. our engineers considerably over two weeks hard plugging to figure out the stress and strains on all the various parts of the frame, and to know to almost an ounce, exactly what weight of wind or snow pressure would be exerted on the roof at any and all points. There is not a bit of guess work in that entire construc- tion. It is all based on facts and figures. Not the figures of some mechanical construction book, compiled by a sky scraper engineer or bridge builder—but the facts and figures accum- ulated and proven in our business of more than half a cen- tury of greenhouse building. This 88 footer is a grejit h

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