54j 



STEEL ROOF TRUSSES AND MILL BUILDINGS. 



CHAP. I. 



Two-section Doors. Doors may be made of wood frame with a sheet-steel covering, or with a 

 steel frame with a sheet-steel covering; the upper section may be glazed with j in. wire glass set in 

 metal frames. Details of doors 20 ft. wide and 22 ft. high are shown as constructed with wood 

 frames, and also with steel frames. Counterweights are commonly made equal to one-half the 

 total weight of the door. 



Sorless 



\-&y&taaa: &&%- Sheet Metal' ^ j 



(Cement Mortar 'Ppf '.Cement^rlortaf < 



with -Corbel. =5; 



<*&&%> 



$4''^ 

 xtf 



fm&F 

 MS? *s c/>9s * 



/%?7yf5 fly ^ FOR SLOPIH6 ROOFS. ' , 

 Extreme Dimensions, ?6x5I'!Expt>sed,24x4."Th/ckness t . 



Standard pur/in spacing 4'-Q". Spacing can be wriedfry/ff \ 

 3 L IO%4ty"5pec;alti/efore3veccurseM%r!f.lfthe ] 

 standard spacing can not be used the short course is - 

 "" 



Tiles withl4x24"Mre-g/dssinsetsarefnadeFors/(y//4>ht:5. ( 

 fft/getile, ridge rent/ fetor tile, hip ridge tile, sawtooth ridge 

 t/le,and flashing tile are made.Metal gutters are used 

 with standard tilesfcut to fit) in hlpKilley construction. 

 Tiles require no fastening topurlinsJointsmadenster-tight 

 with elastic cement. Exposed side of tile isred^nders/Je, 

 Is white. Minimum pitch of roof is one-Fifth. Safe/oad 



pForft'bay.Saqrodsshyse two lines fcrbaysorer/S 1 . Mebl Thimbie^^t^, 



For Downspout) 



FIG. 59. DATA FOR "BONANZA" CEMENT TILE. 



Single-Section Doors. Doors may be made with wood frames or with steel frames. Details 

 of a door 27 ft. 9 in. wide and 19 ft. 6 in high are shown. 



