VENTILATORS AND DOORS. 



43 



Details of glazed sash and window frames as adopted by the American Bridge Company 

 are given in Fig. 27 to Fig. 34. 



VENTILATORS. Mill buildings may be ventilated by means of monitor ventilators, or by 

 means of circular ventilators. Details of a circular ventilator as designed by the American Bridge 

 Company are shown in (3) Fig. 23. Details of a standard monitor steel louvre ventilator are 

 shown in Fig. 35. The sides of the monitor ventilator in Fig. 42 were fitted with louvres which 

 were to be closed in cold weather. Buildings of this type should have glazed sash so that when 

 the ventilators are closed the light will not be cut off. Data for estimating louvre slats are given 

 in Fig. 20. 



CONTINUOUS SLIDING SASH 



j *2y LagScrewr, 

 /1W6" Block' \?\ .> 



iL*~ T* 'ft.-- ^1- -~. ^--NN. 



7^ /'/. 



pi Stop-' 





*' 



~*:for&y Strip 



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 ^-1 



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i...y 



Flashing* 



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*jr stop* &?*M , , r 



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 woodStr/p 

 <lZ"*74-"s;lt 



FIG. 34. DATA FOR CONTINUOUS SLIDING SASH. 

 AMERICAN BRIDGE COMPANY. 



WOODEN DOORS. Wooden doors are usually constructed of matched pine sheathing 

 nailed to a wooden frame as shown in Fig. 36. These doors are made of white pine. Doors up 

 to four feet in width should be swung on hinges; wider doors should be made to slide on an over- 

 head track or should be counter-balanced and raise vertically. Sliding doors should be at least 

 4 in. wider and 2 in. higher than the clear opening. 



