Squaring of the plates should not be forgotten. 



PRAMS DOOR AMD WINDOW OPiSNINGS. 



The setting of the studding at door and window 

 openings deserves more attention than is usually given it 

 Only good straight studding should be selected for this 

 purpose. Although somewhat out of place in this text, 

 it might be appropriate to add that door jambs and window 

 frames should be carefully plumbed. Do not space the 

 jambs or frames by using the lines of the studding as a 

 guide. Plumb the jambs or casings carefully with B 

 spirit level. See Cut No. B.M.-4 for details of door 

 jambs and casings and window frames. Before ordering 

 factory made casings, read carefully pages 11 to 14 

 ive. 



RAFTERS. 



In E pit.ch roof the following terms must be 

 agreed upon. 



Raise is the height of the head of rafter (at 

 the ridge pole) above the level of the plates. 



Run is the horizontal distance from the foot of 

 the rafter to a plumb line hung from its top and is, there- 

 fore, in an ordinary full gable roof, equal to one-half 

 the width of the building. 



Pitch is the steepness of the roof, expressed 

 in terms of the ratio between the rise and the width of 

 the building (or twice the run). For example, in a build- 

 ing 24 feet wide, if the 'rise is 8 feet the roof is one- 

 third pitch. Cut No. B.M.-7 shows inches rise per foot 

 of run for common rafters for the fractional pitches com- 

 monly used up to full pitchy also the lengths of both com- 

 mon and hip and valley rafters per foot of run. 



Projection of overhang, is the portion of the 

 rafter which extends beyond the plate to protect the side 

 of the building from drip. 



B.M. (32) 



