• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Figure 2-41.-Rafter table method.
Jack Rafters

Builder 3&2 Volume 02 - Construction manual for building structures
Page Navigation
  64    65    66    67    68  69  70    71    72    73    74  
Figure 2-44.-Shortening allowance of valley rafters suspended ridge method of intersecting roof framing. Figure 2-45.—Method of framing dormer without sidewalk. Figure  2-46.—Arrangement  and  names  of  framing  members for dormer without sidewalls. Figure  2-47.—Valley  rafter  shortening  allowance  for  dormer without sidewalls. As  indicated  in  figure  2-44,  the  shortening allowance of each of the short valley rafters is one-half the  45°  thickness  of  the  addition  ridge.  Each  rafter  is framed to the addition ridge with a single side cut. Figure 2-45 shows a method of framing a gable dormer without sidewalls. The dormer ridge is framed to a header set between a pair of doubled main-roof com- mon rafters. The valley rafters (AB and AC) are framed between this header and a lower header. As indicated in the framing diagram, the total run of a valley rafter is the hypotenuse of a right triangle with the shorter sides equal to the total run of a common rafter in the dormer. Figure  2-46  shows  the  arrangement  and  names  of framing members in this type of dormer framing. The upper edges of the header must be beveled to the cut of the main roof. Figure 2-47 shows that in this 2-29







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.