BUILDING CONSTRUCTION 



141 



TO ROOFS. 



cs. 54, 55 and 56. 



e Roof 

 liar Tie. 



louple Roof 

 wer Tie. 



with 



with 



z 



Coupl 



pie Roof with 

 Ties and 2 Struts. 



Roof with 

 tre Hanger. 



e Roof with 

 1 Tie and 2 Hangers. 



King Post Roof. 

 Queen Post Roof. 



and 10. Three types 

 jf Steel Roofs with 

 rood Purlins for 

 warding and slates. 



R. Rafter. 



Rl. Ridge. 



Common Rafter. 



.R. Principal Rafter. 



T.B. Tie Beam. 



S. Strut. 



P. Purlin. 



H. Hanger. 



.P. King Post. 



J.P. Queen Post. 



Straining Beam. 

 W.P. Wall Plate. 



vlembers subject to com- 

 ression are indicated by 

 C," and to tension 

 y "T." 



FIG. 55. Framed Roofs. 



FIG. 56 Steel Trusses. 



