


Thread Tools  Search this Thread  Display Modes 
07192006, 09:00 PM  #1 
Newbie
Join Date: Jul 2006
Posts: 3
Rewards Points: 10

Finding length of gable boards
Is there a formula for figuring out the length of a gable fascia board?
I have the width of the gable (32') and I have the height (6') the pitch/rise is 412 Im trying to figure out the amount of soffit & fascia I need to order without having to climb up on the roof to measure the actual 1x6 boards. Thankyou 
07192006, 10:11 PM  #2 
Member

Finding length of gable boards
AT 32 feet wide and 6 feet high in center you have 17.088 feet on each gable roof.
The pitch is actually 4.5/12. Last edited by joed; 07192006 at 10:15 PM. 
07202006, 06:46 AM  #3  
Framing Contractor
Join Date: Apr 2006
Location: Caldwell, NJ
Posts: 1,758
Rewards Points: 1,000

Finding length of gable boardsQuote:
You have to figure at least 18' of rake. The formula is (a squared )+ (b squared) = (c squared). That's just one way. there are many.
__________________
Joe Carola 

07202006, 10:52 PM  #4 
Newbie
Join Date: Jul 2006
Posts: 3
Rewards Points: 10

Finding length of gable boards
Thankyou for your responses.
Can you tell me how you both figured that the rise is 4.5? What formula did you use to find this. Last edited by Borske; 07202006 at 11:12 PM. 
07222006, 10:54 AM  #5 
renovations
Join Date: Aug 2005
Location: Canada
Posts: 430
Rewards Points: 250

Finding length of gable boards
rise/run=6'/16'=4.5/12

07222006, 12:46 PM  #6  
Framing Contractor
Join Date: Apr 2006
Location: Caldwell, NJ
Posts: 1,758
Rewards Points: 1,000

Finding length of gable boardsQuote:
One way is like this; rise/run x 12 = (pitch) Your example with a 6' rise and 16' run. 6/16 = .375 x 12 = 4.5 That will get you close to what you want but that will not be your pitch because your 6' is to the top of the rafter at the ridge line and that doesn't account for the rafter thickness and the H.A.P. cut (height above plate) which is the plumbcut line measured on the outside of the top plate vertical to the top of the rafter after you cut your birdsmouth. Once you cut the level seatcut out you measure this. This means that your pitch will be lower than 4.5/12. That 4.5/12 is with a perfect triangle with a 6' rise and 16' run giving you a 17' 11/16" diagonal. You will have a different pitch and measurement with whatever rafter stock you use.
__________________
Joe Carola 

Thread Tools  Search this Thread 
Display Modes  


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Gable fan and Whole house fan  jckkcj  Roofing/Siding  8  08262009 12:55 PM 
Rotted floor boards. How do I fix THIS???  gshock  Building & Construction  4  08142007 06:59 PM 
Gable vents  Burat  Building & Construction  1  04092007 03:11 PM 
Cedar Deck boards  Outbacker  Painting  2  03042006 01:12 PM 