STEEL ROOF TRUSSES AND MILL BUILDINGS. 



CHAP. I. 



^Concrete -^ f E/ast/c Cement f ,- RooFinqTfle 



/ ^Composition Roofing 



longitudinal Section oFFIatTile 



:JvidthZW,\ 



Transverse Section of FlatTile 

 Length5 L 0"orless. Width?-0'! Thick. " 

 'z. Section Weiqht I6lb./sq. Ft. Reinforcement-?-^ 

 "s bdrshnqitudina//ydndt1o./6xp.r1etdl. 



. 

 Pur/ins for total load ofM*6<f. ft. 5-O'Tile, 



Horizontal Mnt Election Showing Joints Yertical Section /fa?0'-7'h/f*??'*?4'#"Jx/#* 

 CtMEfiTWALL PLATES MOHITOR END WALLS FLAT CEMENT RMFINGTILE 



Standard J-0"\- 

 Cement Tile ,(jl . 



^'Truss ^^^ ^ 



Top Plan Book ile 

 Composition Roofing- -f. 



Under side pot/shed 

 \ lO'-O'L toe. tn/sxsorpur/ins I 



Thickness 3','airspdce/j, , 

 Min.pitchg. Weight ?5lb./sq. Ft. 

 fie waterproofinq required. 



CEMENT HOLLOW PITCHED TILE 



j Weight 25 /k/sq. Ft J 



Composition Roofing- 



, . tt ^^6'of Jess c.toc. Standard 5'^. 

 \ J-^i* Thickness 3; Wall 



Each course of 5 'tile substituted for4'tile 

 increases A /W for j pitch, l-ffirj pitch, 



RBNFWKfD OWSUMtiMfTlLE. CEttEHT HOLLOW FLAT SLAB 



P^C it=r- - -' : .xr-ftf 1 "' O.-.F ii |( 



WIDTHS OF BUILDING FOR 5TANDAKDTUE ROOF 



WHEL Pu/?LIHSFORPmOBA/tTlLEl?00F5 

 Total Load 50 lb./sq.f {.including WeightjF too f 



HarRarters 

 Total load 50lb.fa.Ft.. fei 



jtfkemr 100 sq.ft. 

 T-fofterslW*-'"'-- 71 "- 



j- \btli MF 51 1/Sfft. 



DETAILS FOR PYWBAR GYPSUM ROOF TILE 5--Purlinspac.Maremmumtm sections. 



FIG. 61. DATA FOR FEDERAL CEMENT TILE (UPPER PART), AND DATA FOR PYROBAR GYPSUM 



TILE (LOWER PART). 



Single-Leaf Vertical-Sliding Door. These doors require adequate headroom. Details of a 

 door 8 ft. wide and 8 ft. high are shown. These doors are often placed in pairs, where one counter- 

 weight and one winch will serve for both doors. 



Double-Leaf Vertical-Sliding Doors. The two sections of these doors are equipped with sep- 

 arate guides and are operated separately. Details of a door 20 ft. wide and 18 ft. high are shown. 



Crane Runway Doors. These doors may swing inward or outward. The doors may be 



