Thursday, April 24, 2014

California Valley Sleeper

I have California Valley Sleeper's, layover rafters, to install next week and I was trying to see what angles I would use to layout the bevel cut on the foot of the California Valley Sleeper. I've cut a couple hundred valley sleepers and never really thought much about the cut at the foot of the valley sleeper. Mark off the roof sheathing angle at the foot of the valley sleeper and set the saw blade bevel angle to the slope of the roof. After developing a couple of drawings, the correct bevel on the side of the valley sleeper material is the valley sleeper saw blade bevel angle. The compound miter cut on the foot of the valley sleeper results in 90° - Valley Sleeper Saw Blade Bevel Angle.

Also, this is the first time I've seen the call out on the structural roof framing plans for 2x beveled sleepers. Normally, it's just called out as a 2x sleeper.

Valley Sleeper Saw Blade Bevel Angle = 90° - (Main Hip Rafter Backing Angle + Adjacent Hip Rafter Backing Angle)

On this roof it's an equal pitched roof, 4:12.

Roof Eave Angle = 90.00000
SS = Main Rafter Slope Angle = 18.43495
S = Adjacent Rafter Slope Angle = 18.43495
DD = Main Plan Angle = 45.00000
D = Adjacent Plan Angle = 45.00000
R1 = Hip Rafter Slope Angle = 13.26268
C5m Main Hip Rafter Backing Angle = 12.92097
C5a Adjacent Hip Rafter Backing Angle = 12.92097
Valley Sleeper Saw Blade Bevel Angle = 90° - (C5m + C5a) = 64.15807
P2m = Main Jack Rafter Side Cut Angle = 43.49152
90° - P2m = Main Roof Sheathing Angle = 46.50848
P2a = Adjacent Jack Rafter Side Cut Angle = 43.49152
90° - P2a = Adjacent Roof Sheathing Angle = 46.50848







The California Valley Sleeper rotated into the hip rafter position is the same as the trèteau à devers hip rafter. Where the hip rafter is rotated into the roof surface of the roof.

Wire frame sketch of the roof the California Valley Sleeper is rotated into. The rafter slope angles are 90° - rafter slope angle when it's a valley rafter. The other rafter slope angle is the plan angle. 45.00° in this equal pitched roof. The plan angles are the level and miter angles for the equal pitched roof.

The foot of the trèteau à devers hip rafter is the same as the California Valley Sleeper. The head cut miter angle for the hip rafter is also the same as the California Valley Sleeper.

No comments:

Post a Comment