Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer

 
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Old 03-21-2012, 05:32 PM   #1
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Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


We've been out of work this last month, so to to keep busy I wrote the following online scripts.

Dormer Shed Roof Rafter Calculator
http://sbebuilders.com/tools/geometr..._shed_roof.php

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

Dormer Shed Roof Rafter Length
Dormer Shed Roof Miter Angle (Rake Cut Angle)
Dormer Shed Roof Sleeper Bevel Length
Dormer Shed Roof Intercept Run ( Intersection of Dormer Roof and Main Roof)
Main Roof Intercept Length (Usefull for laying out Dormer Sleeper that is not Beveled)


CutIn Dormer Shed Roof Rafter Calculator
http://sbebuilders.com/tools/geometr..._shed_roof.php

This CutIn Dormer Shed Roof calculator will return roof framing trigonometry & geometry details for:

Dormer Shed Roof Rafter Length
Dormer Shed Roof Miter Angle (Rake Cut Angle)
Dormer Shed Roof Run
Main Roof Rafter Intercept Length
Dormer Intersect Length For Lapping Rafters
Intersecting Roof Slope Angle

Pitch Break Shed Roof Rafter Calculator
http://sbebuilders.com/tools/geometr..._shed_roof.php

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

Pitch Break Shed Roof Rafter Length
Pitch Break Shed Roof Miter Angle (Rake Cut Angle)
Total Pitch Break Run ( Intersection of Shed Roof and Main Roof)
Main Roof Intercept Length
Main Roof Run To Intersection of Main Roof And Shed Roof

Barrel Roof Dormer Framing Calculator
http://www.sbebuilders.com/tools/geo...arrel_roof.php

This Barrel Roof Dormer calculator will return roof framing trigonometry & geometry details for:

Barrel Roof Semi Major Axis of the Elliptical Valley Footprint
Barrel Roof Plan View Run of the Ellipse from the intersection of the barrel roof and main roof.
Total Arc Length of Barrel Roof
Arc Angle of Purlin Rafter Spacing
Cord Length of Purlin Rafter Spacing
Ellipse layout points on Main Roof Surface
Purlin Rafters cut perpendicular to Roof Surface
Purlin Rafter Slope Angle
Purlin Rafter Miter Angle
Purlin Rafter Saw Blade Bevel Angle
Barrel Roof Plan View Rafter Lengths
X & Y Points for Elliptical Ploting of the Ellipse on the Main Roof Surface
Real Roof Surface plotting points for the plywood roof sheathing
Ellipse Valley Sleeper Offset
Purlin Rafter Deduction for Ellipse Valley Sleeper Offset

Eyebrow Roof Dormer Framing Calculator
http://www.sbebuilders.com/tools/geo...oof_dormer.php

This Eyebrow Roof Dormer calculator will return roof framing trigonometry & geometry details for:

Eyebrow Roof Dormer Semi Major Axis of the Elliptical Valley Footprint
Eyebrow Roof Dormer Plan View Run of the Ellipse from the intersection of the eyebrow roof and main roof.
Total Arc Length of Eyebrow Roof Dormer
Arc Angle of Purlin Rafter Spacing
Cord Length of Purlin Rafter Spacing
Ellipse layout points on Main Roof Surface
Purlin Rafters cut perpendicular to Roof Surface
Purlin Rafter Slope Angle
Purlin Rafter Miter Angle
Purlin Rafter Saw Blade Bevel Angle
Eyebrow Roof Dormer Plan View Rafter Lengths
X & Y Points for Elliptical Ploting of the Ellipse on the Main Roof Surface
Real Roof Surface plotting points for the plywood roof sheathing
Ellipse Valley Sleeper Offset
Purlin Rafter Deduction for Ellipse Valley Sleeper Offset

Sim
Attached Thumbnails
Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-eyebrow_roof_dormer_2.jpg  
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Old 03-21-2012, 05:49 PM   #2
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


The Eyebrow Roof Dormer Framing Calculator is based on two tangent circles with the same radius. The script takes the total arc length of the eyebrow roof dormer face profile and divides it by the O.C. spacing of the purlin rafters to calculate the layout points on the plan view ellipse and the roof surface ellipse. It then uses these points to draw out an AutoCAD DXF file each time the script is run. You can download and view the DXF file in any CAD program. The script also draws the real roof surface of the eyebrow roof dormer (roof sheathing).

You can also import the DXF file into Google SketchUp and connect the plan view ellipse, main roof surface ellipse rotated to the slope angle of the roof and the eyebrow dormer face profile. Then connect the lines for a 3D image of the Eyebrow Roof Dormer.

An Google SketchUp model of the eyebrow dormer created from the DXF is attached below.

Sim
Attached Thumbnails
Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-eyebrow_roof_dormer_3.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-eyebrow_roof_dormer_2.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-eyebrow_dim-1.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-eyebrow_roof_cut_out_pattern.jpg  
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File Type: skp Eyebrow_Roof_Dormer_2.skp (32.6 KB, 84 views)

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Old 03-21-2012, 06:02 PM   #3
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


The Barrel Roof Dormer Framing Calculator is based on a right cylinder intersecting with a sloping surface. The script takes the total arc length of the barrel roof dormer face profile and divides it by the O.C. spacing of the purlin rafters to calculate the layout points on the plan view ellipse and the roof surface ellipse. It then uses these points to draw out an AutoCAD DXF file each time the script is run. You can download and view the DXF file in any CAD program. The script also draws the real roof surface of the barrel roof dormer (roof sheathing).

You can also import the DXF file into Google SketchUp and connect the plan view ellipse, main roof surface ellipse rotated to the slope angle of the roof and the barrel dormer face profile. Then connect the lines for a 3D image of the Barrel Roof Dormer.

A Google SketchUp model of the barrel roof dormer created from the DXF file is attached below.

Sim
Attached Thumbnails
Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-barrel_roof_text.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-barrel_roof_dim.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-barrel_roof_wireframe.jpg  
Attached Files
File Type: skp Barrel_Roof_Wireframe.skp (34.6 KB, 62 views)
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Old 03-21-2012, 06:07 PM   #4
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


The Dormer Shed Roof Rafter Calculator prints out something like like.

Dormer Shed Roof Calculations
Calculations are rounded to the nearest 1/16 inch


Main Roof Pitch = 8:12
Main Roof Pitch Angle = 33.69007
Main Rafter HAP = 0'-7 13/16''
Main Roof Sheathing Thickness = 0'-0 1/2''
Main Roof Rafter Material Depth = 0'-9 1/2''
Main Roof Rafter Plumb Height = 0'-11 7/16''
Main Run = 2'-8 9/16''

Dormer & Main Roof Plate Line Difference = 0'-0''

Dormer Roof Pitch = 3:12
Dormer Roof Pitch Angle = 14.03624
Dormer Rafter HAP = 0'-8 7/16''
Dormer Run = 4'-6''
Dormer Sleeper Material Thickness = 0'-1 1/2''
Dormer Roof Rafter Material Depth = 0'-9 1/2''
Dormer Roof Rafter Plumb Height = 0'-9 13/16''
Dormer Rafter Length = 7'-0 13/16''
Dormer Sleeper Bevel Length = 0'-4 1/2''
Dormer Miter Cut Angle = 19.65382
Dormer Rafter Miter Cut Length = 2'-4 1/4''
Dormer Intercept Run = 7'-2 9/16''

Main Roof Slope Intercept Length = 2'-10 15/16''
Dormer Rafter Length To Main Roof Sheathing Without Sleeper = 7'-5 1/4''

C1 = 75.96376
C2 = 70.34618
C = 146.30993
A = 19.65382
a = 54.00000



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

c = Dormer Rafter Length
A = Main Roof Pitch Angle - Dormer Roof Pitch Angle
C = 90 - Dormer Roof Pitch Angle + (90 - (Main Roof Pitch Angle - Dormer Roof Pitch Angle))


Dormer Rafter Length = Dormer Run sin(90 - Dormer Roof Pitch Angle + ( 90 - (Main Roof Pitch Angle - Dormer Roof Pitch Angle))) sin(Main Roof Pitch Angle - Dormer Roof Pitch Angle))
Dormer Rafter Length = 54.00 sin(90 - 33.69007 + (90 - (33.69007 - 14.03624))) sin(33.69007 - 14.03624 )
Dormer Rafter Length = 54.00 sin(146.30993) sin(19.65382 )= 89.05908

or
Dormer Altitude = sin(Dormer Roof Pitch Angle) * Dormer Run
Dormer Altitude Run = Dormer Altitude tan(Dormer Roof Pitch Angle)
Dormer Miter Cut Angle = Main Roof Pitch Angle - Dormer Roof Pitch Angle
Main Altitude Run = Dormer Altitude tan(Dormer Miter Cut Angle)
Dormer Rafter Length = Dormer Altitude Run + Main Altitude Run
Main Intercept Run = (Dormer Rafter Length * cos( Dormer Roof Pitch Angle)) - Dormer Run


Dormer Altitude = 1'-1 1/8''
Dormer Altitude Run = 4'-4 1/2''
Dormer Miter Cut Angle = 19.65382
Main Altitude Run = 3'-0 3/4''

Dormer Rafter Length To Main Roof Sheathing Without Sleeper = 7'-5 1/4''
Main Intercept Run = 2'-8 1/2''
Attached Thumbnails
Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-dormer_shed_roof_text.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-dormer_shed_roof.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-dormer_shed_roof_text_sleeper.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-dormer_shed_roof_law_sines.jpg  
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Old 03-21-2012, 06:09 PM   #5
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


The CutIn Dormer Shed Roof Rafter Calculator prints out something like this.

CutIn Dormer Shed Roof Calculations
Calculations are rounded to the nearest 1/16 inch


Main Roof Pitch = 8:12
Main Roof Pitch Angle = 33.69007
Main Roof Rafter Material Depth = 0'-9 1/2''
Main Roof Rafter Plumb Height = 0'-11 7/16''

Dormer Plate Line Height Above Main Roof = 3'-0''

Dormer Roof Pitch = 3:12
Dormer Roof Pitch Angle = 14.03624
Dormer Rafter HAP = 0'-6 7/8''
Dormer Run = 8'-6 7/8''
Dormer Roof Rafter Material Depth = 0'-7 1/2''
Dormer Roof Rafter Plumb Height = 0'-7 3/4''
Dormer Rafter Length = 8'-10 1/16''
Dormer Miter Cut Angle = 19.65382
Dormer Rafter Miter Cut Length = 2'-4 1/4''

Main Roof Rafter Intercept Length = 10'-3 5/8''
Intersecting Roof Slope Angle = 22.61986
Attached Thumbnails
Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-cutin_dormer_shed_roof_1.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-cutin_dormer_shed_roof_2.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-cutin_dormer_shed_intersecting_angles_1.jpg  
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Old 03-21-2012, 06:12 PM   #6
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


The Pitch Break Shed Roof Rafter Calculator prints out something like this.

Pitch Break Shed Roof Calculations
Calculations are rounded to the nearest 1/16 inch


Main Roof Pitch = 8:12
Main Roof Pitch Angle = 33.69007
Main Rafter HAP = 0'-7 13/16''
Main Roof Rafter Material Depth = 0'-9 1/2''
Main Roof Rafter Plumb Height = 0'-11 7/16''
Main Pitch Run = 8'-1 5/16''

Shed Roof Plate Line Difference = 0'-0''

Shed Roof Pitch = 4:12
Shed Roof Pitch Angle = 18.43495
Shed Rafter HAP = 0'-8 3/16''
Shed Roof Run = 8'-0''
Shed Roof Rafter Material Depth = 0'-9 1/2''
Shed Roof Rafter Plumb Height = 0'-10 1/16''
Shed Roof Rafter Length = 16'-11 3/4''

Intersect Miter Cut Angle = 15.25512
Intersect Miter Cut Length = 3'-0 1/8''

Total Pitch Break Run = 16'-1 5/16''

Main Roof Intercept Length = 9'-8 15/16''
Attached Thumbnails
Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-pitch_break_roof_2.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-pitch_break_roof_1.jpg  
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Old 03-21-2012, 06:14 PM   #7
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


That's pretty cool. I only understand the shed roof one though law of sines!
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Old 04-11-2012, 06:37 PM   #8
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Quote:
Originally Posted by sbebuilders View Post
The Eyebrow Roof Dormer Framing Calculator is based on two tangent circles with the same radius. The script takes the total arc length of the eyebrow roof dormer face profile and divides it by the O.C. spacing of the purlin rafters to calculate the layout points on the plan view ellipse and the roof surface ellipse. It then uses these points to draw out an AutoCAD DXF file each time the script is run. You can download and view the DXF file in any CAD program. The script also draws the real roof surface of the eyebrow roof dormer (roof sheathing).

You can also import the DXF file into Google SketchUp and connect the plan view ellipse, main roof surface ellipse rotated to the slope angle of the roof and the eyebrow dormer face profile. Then connect the lines for a 3D image of the Eyebrow Roof Dormer.

An Google SketchUp model of the eyebrow dormer created from the DXF is attached below.

Sim
This should have generated much more comments,Its great to see some one put this level of effort into this roof.

I was able to build a model but the way in which I figured it was tedious and not practical for a full scale roof.

Thanks for this.
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Old 04-11-2012, 06:41 PM   #9
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


I agree ^, this is the first time I've seen this thread. You did a great thing!
I've built eyebrow windows before and I could have used your information.
Keep up the great work and hopefully you will get back to work soon
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Old 04-11-2012, 07:07 PM   #10
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


This should be a sticky; my first time seeing this thread as well.
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Old 04-11-2012, 07:13 PM   #11
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Time well spent and very informative . Great job
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Old 04-11-2012, 07:21 PM   #12
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Quote:
Originally Posted by jb4211 View Post
This should be a sticky; ...
I'll second that

Great work Sim... Thanks for sharing it
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Old 04-11-2012, 07:50 PM   #13
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Incredible break down Sim, very much appreciated. Some one please "sticky" this!
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Old 04-12-2012, 10:22 PM   #14
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Quote:
Originally Posted by jb4211 View Post
This should be a sticky; my first time seeing this thread as well.
I agree,

This is the first time I've seen anybody breakdown the eyebrow dormer mathematically,I was able to calculate the front and the remaining ribs of the roof,but it required so much math I didn't even want to mess with the elliptical sleeper boards.
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Old 04-13-2012, 09:26 AM   #15
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


really nice that someone shares their efforts, and there's definitely a lot of effort into those designs.
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Old 04-13-2012, 03:45 PM   #16
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Thanks a bunch. It is nice to see folks sharing knowledge.
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Old 04-13-2012, 05:51 PM   #17
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Great info I am sure it will be very helpful. Thanks for taking the time to post!!
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Old 04-14-2012, 02:20 PM   #18
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Thanks for the comments.

Here's a link to a Google Sketchup plugin I just wrote. It draws outs roof framing tetrahedrons and roof framing kernels.


http://www.sbebuilders.com/pdf/RoofFraming.zip

Just unzip it in the Google SketchUp \Plugins directory.
The file structure should look something like this.

C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\plan_angle.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\draw_angle_dim.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\interior.png
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\exterior.png

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Attached Thumbnails
Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-tetrahedron-1.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-tetrahedron-2.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-tetrahedron-3.jpg   Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer-tetrahedron-4.jpg  
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Old 04-15-2012, 07:29 PM   #19
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Quote:
Originally Posted by sbebuilders View Post
Thanks for the comments.

Here's a link to a Google Sketchup plugin I just wrote. It draws outs roof framing tetrahedrons and roof framing kernels.


http://www.sbebuilders.com/pdf/RoofFraming.zip

Just unzip it in the Google SketchUp \Plugins directory.
The file structure should look something like this.

C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\plan_angle.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\draw_angle_dim.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\interior.png
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\exterior.png

Sim
Every carpenter should understand tetrahedron and how to solve for formula,they would throw away every roof framing book they ever purchased.

Last edited by mike86; 04-15-2012 at 08:05 PM.
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Old 04-15-2012, 07:38 PM   #20
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Re: Dormer Shed Roof, Barrel Roof, CutIn Dormer, Eyebrow Dormer


Quote:
Originally Posted by sbebuilders View Post
Thanks for the comments.

Here's a link to a Google Sketchup plugin I just wrote. It draws outs roof framing tetrahedrons and roof framing kernels.


http://www.sbebuilders.com/pdf/RoofFraming.zip

Just unzip it in the Google SketchUp \Plugins directory.
The file structure should look something like this.

C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\plan_angle.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\draw_angle_dim.rb
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\interior.png
C:\Program Files\Google\Google SketchUp 8\Plugins\RoofFraming\exterior.png

Sim
What language did you use to program it?

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At DrywallTalk.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

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