FIXED SASH WITH MONITORS. 41 



glass for glazing windows in industrial plants is " factory ribbed glass " with twenty-one rib* to 

 the inch, the ribs being placed on the inside of the window. This glass is considerably more ex- 

 pensive than plane glass but is much more satisfactory. 



Translucent fabric made by imbedding wire cloth in a translucent material made of linseed 

 oil, is also used for glazing in industrial buildings. Translucent fabric will be charred by a live 

 coal but is practically fire-proof. It shuts off part of the light, making it possible for men to work 

 under it without shading. 



CONTINUOUS PIVOTED 

 AHD FIXED SASH 



i'*?} Bolts 

 every 3 Feet 



every 5 Feet 



Note If sash are fixed continue stops a// 

 around except across si// on outside I~z fourxP ever y 3 /* 



FIG. 32. DATA FOR CONTINUOUS PIVOTED AND FIXED SASH IN MONITORS. 

 AMERICAN BRIDGE COMPANY. 



The amount of glazed surface required in mill buildings depends upon the use to which the 

 building is put, the material used in glazing, the location and the angle of the windows and sky 

 lights, and the clearness of the atmosphere. It is common to specify that not less than 10 per 

 cent of the exterior surface of mill buildings and 25 per cent of the exterior surface of machine 

 shops should be glazed. Many industrial plants have as much as 60 per cent of the exterior 

 walls of glass. 



