Replies

1. 
   Framer | Jun 21, 2005 02:07am | #1

    

   Could someone double check some things for me?  8 pitch regular hip roof.  Double 2X hips (3"), double LVL ridge (3 1/2")

   Ok... here goes.

   First... hip drop.... for a single 2X hip at an 8 pitch, I drop it 3/8".  I take it right out of roof framer's Bible.  Do I drop a double 2X hip 3/4"?

   Yes, You drop the hip 3/4".

    

    Second... Jack rafter tieing into hip... I deduct 2 1/8" square to the plumb cut right?  That's 1/2 the width of my hip at a 45.  That would translate to 2 9/16" deduction along the top of the rafter... at an 8 pitch, right?

   That's correct if you were to do it that way.

    Third.... if my first jack, measured from the outside corner of the building (center of the hip) is 16" to the center of the jack rafter.  My first jack rafter is 19 1/4" before hip deductions, measured along the center of the rafter, correct?

   Yes, That's correct.

   I like to deduct before figuring out the rafter length first. Your example was measureing from the outside corner of the building (center of hip) is 16" to the center of the jack.

   I like to figure to the long point, so what I would do in your case since you have 16" to the center of the jack from the outside corner I would go 3/4" bigger,16-3/4" - 2/1-8" (diagonal of 1.5" hip)= 14-5/8" would be the run of the first jack and the jack length would be 17-9/16" to the long point. 

   That's just me. Your getting the right answers the way your doing it.

    

   Joe Carola
1. 
   dieselpig | Jun 21, 2005 02:23am | #3

   Sweet.  I was hoping you'd come along. 

   You mentioned that you would go 16 3/4" instead of 16" and measure to "the long point".  That is actually the way I do and will do it.  I just wasn't sure if most people did it that way and didn't want to confuse the question with "long point", "short point" stuff.

   As far as the deduction on the jack for the width of the hip.  I usually deduct it on the first one and then use the common difference in length from there.  I think I get a bit of accumulative error that way though.  So I though this time I'd figure them all out individually in relation to their distance from the hip.

   Is that how you do it? I can take 16 3/4"  minus 2 1/8" as my run (14 5/8"). 

   Then I can just keep adding 16" starting with 14 5/8" as my run.  The hip deduction is now "built in", right?

   Did that make any sense?

1. 
   Framer | Jun 21, 2005 02:50am | #5

   "Is that how you do it? I can take 16 3/4" minus 2 1/8" as my run (14 5/8")." Yes, That's what I do."Then I can just keep adding 16" starting with 14 5/8" as my run. The hip deduction is now "built in", right?"From the 14-5/8" mark I would keep adding 19-1/4" and making the jack rafter marks bigger and bigger. I've always used the jack rafter distance on my patterns and sometimes your off an 1/8" or so.Joe Carola

1. 
   dieselpig | Jun 21, 2005 03:05am | #6

   I get it.  Good system.  1/8" can happen just as easily by cutting the wrong side of the line... I can live with it.

   Thanks very much Joe.

2. 
   Framer | Jun 21, 2005 02:15am | #2

   I forgot to add the picture.

   Joe Carola
1. 
   dieselpig | Jun 21, 2005 02:26am | #4

   Re... the picture.... you're the best.

   Thanks Joe.