GLASS 



Forcing Houses for Carnations 

 New Galvanized Iron U-Bar Construction 



These houses are con- 

 structed upon a princi- 

 ple entirely new and a 

 ' radical departure from 



the standard type of iron 

 frame greenhouse. The 

 foundation consists of 

 iron posts bedded in con- 

 crete, to which posts is 

 bolted an angle-iron base 

 extending entirely 

 around the house. The 

 bars which are bolted to 

 this base extend to the 

 ridge, and are there con- 

 nected by iron brackets, 

 which also support the 

 ridge. There is no plate 

 or gutter at the eaves, 

 the bars being bent at that point and curved glass used. There are no rafters 

 in the house, the entire structure being self-supporting, the U-bars and ties 

 forming a trussed arch. The purlins can be spaced as far as 9 feet apart. 

 The bar is very small, measuring i!4 by i^ inches over all. The bars are 

 made of steel, U-shaped, and filled with wood, which extends above the U- 

 bar and forms a medium to which to attach the glass and prevents expan- 

 sion and contraction of the metal bar. The glass is bedded in putty and rests 

 on the edges of the U-bars, which are heavily galvanized. The sides of the 

 house below the plate are of concrete. Practically the only wood exposed on 

 the inside of the house is the doors, ridge and sash, while the only iron ex- 

 posed on the outside of the house is the sills. 



Owing to the formation at the eaves it is claimed that this type of house 

 frees itself of ice much quicker and more thoroughly than any other type, and 

 the claim is also made that owing to the rigid construction and the manner in 

 which the expansion and contraction are guarded against there is practically 

 no glass breakage. The houses present an appearance of extreme lightness, 

 strength and durability and the effect of the whole is exceedingly handsome. 

 The construction is apparently exceptionally durable and the cost of repairs 

 should be reduced to a minimum. 



iVevv Galvanized Iron U-Bai 



159 



