SBE Builders

Strong Built Establishments Builders

SBE Builders is a commercial and residential framing contractor located in Discovery Bay California. Dedicated to the art of Carpentery & Roof Framing. We are the professionals for the future of the craft of carpentry.

This Pitch Break Shed Roof calculator will return roof framing trigonometry & geometry details for:

  1. Pitch Break Shed Roof Rafter Length
  2. Pitch Break Shed Roof Miter Angle (Rake Cut Angle)
  3. Total Pitch Break Run ( Intersection of Shed Roof and Main Roof)
  4. Main Roof Intercept Length
  5. Main Roof Run To Intersection of Main Roof And Shed Roof

Pitch Break Shed Roof Rafter Calculator

Pitch Break Shed Roof Details
    Main Roof Pitch
    Shed Roof Pitch
    Main Roof Rafter HAP
    Shed Roof Rafter HAP
    Main Roof Rafter Material Depth
    Dormer Roof Rafter Material Depth
    Plate Line Height Difference entered in Inches
Enter a negitive number if the Shed Roof PL is below the Main Pl
    Shed Roof Run
Entered in Inches

show results in feet & inches


results are show below in the IFrame window

Pitch Break Shed Roof Dim

Law Of Sines

  
Using the Law of Sines 
c = ( a  sin( C ) )  sin( A)

c = Shed Roof Rafter Length
C1 = 90° - Shed Roof Pitch Angle
C2 = 90° - (Main Roof Pitch Angle - Shed Roof Pitch Angle)
C = 90° - Shed Roof Pitch Angle + (90° - (Main Roof Pitch Angle - Shed Roof Pitch Angle))
C = C1 + C2
A = Main Roof Pitch Angle - Shed Roof Pitch Angle  
a = Shed Roof Run

Shed Roof Rafter Length = (Shed Roof Run  sin(90° - Shed Roof Pitch Angle + (90° - (Main Roof Pitch Angle - Shed Roof Pitch Angle))))  sin(Main Roof Pitch Angle - Shed Roof Pitch Angle )
or
Shed Roof Rafter Length = (Shed Roof Run  sin(C))  sin(A)
or
 
Shed Altitude = sin(Shed Roof Pitch Angle)   Shed Run
Shed Altitude Run = Shed Altitude  tan(Shed Roof Pitch Angle)
Shed Miter Cut Angle =  Main Roof Pitch Angle - Shed Roof  Pitch Angle
Main Altitude Run = Shed Altitude  tan(Shed Miter Cut Angle)
Shed Rafter Length = Shed Altitude Run + Main Altitude Run
Main Intercept Run = (Shed Rafter Length   cos( Shed Roof Pitch Angle)) - Shed Roof Run
  
   
  

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SBE Builders
SBE Builders
5305 Laguna Ct.
Discovery Bay, California 94505
(925) 634-6022 • Fax: (925) 634-6022
Commercial & Residential Framing Contractor
American Carpenter and Builder
California Licensed General Building Contractor
CA LIC.#  546126


Roof Framing Geometry

  • Roof framing geometry is empirical-type knowledge.
  • Information gained by means of observation, experience, or experiment.
  • From ground Line 0: Z1, Z2, Z3 etc...
  • To Roof Axis 0: A1, A2, A3 etc...
  • To the bring back line 0 for scribing: B1, B2, B3 etc...

Roof Framing Geometry Blog

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Carpenters Of Steel

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This Is Carpentry

We're a member of the Timber Framers Guild

Timber Framers Guild

American College of the Building Arts, carpentry and timber framing programs.

American College of the Building Arts

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