Figure 2-29.—Calculating common difference of gable-end studs.ends of the building. The fascia rafters (fly rafters) areThe lengths of the other gable studs depend on theplaced between the ridgeboard and the fascia boards.The gable studs should be cut to fit against the rafterabove.End FramingGable-end studs rest on the top plate and extend tothe rafter line in the ends of a gable roof. They may beplaced with the edge of the stud even with the outsidewall and the top notched to fit the rafter (as shown in fig.2-28), or they maybe installed flatwise with a cut on thetop of the stud to fit the slope of the rafter.The position of the gable-end stud is located bysquaring a line across the plate directly below the centerof the gable. If a window or vent is to be installed in thegable, measure one-half of the opening size on each sideof the center line and make a mark for the first stud.Starting at this mark layout the stud spacing (that is, 16or 24 inches on center [OC]) to the outside of thebuilding. Plumb the gable-end stud on the first mark andmark it where it contacts the bottom of the rafter, asshown in figure 2-29, view A. Measure and mark3 inches above this mark and notch the stud to the depthequal to the thickness of the rafter, as shown in view B.spacing.The common difference in the length of the gablestuds may be figured by the following method:and, 2 x 6 inches (unit of rise) or 12 inches (commondifference).The common difference in the length of the gablestuds may also be laid out directly with the framingsquare (fig. 2-29, view C). Place the framing square onthe stud to the cut of the roof (6 and 12 inches for thisexample). Draw a line along the blade at A. Slide thesquare along this line in the direction of the arrow at Buntil the desired spacing between the studs (16 inchesfor this example) is at the intersection of the line drawnat A and the edge of the stud. Read the dimension on thetongue aligned with the same edge of the stud (indicatedby C). This is the common difference (8 inches for thisexample) between the gable studs.Toenail the studs to the plate with two 8d nails ineach side. As the studs are nailed in place, care must betaken not to force a crown into the top of the rafter.2-19
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