Replies

1. 
   Framer | Oct 18, 2006 12:35am | #1

   >> Getting ready to frame the roof, double 1 3/4 x 16 LVL structural ridge, 2x10 rafters with 10/12 pitch to 4' knee wall. Do I need rafter hangers? <<

   Bruce,

   You don't need rafter hangers unless it's code and on your plans with 2x material. Are the rafters sitting on top of the ridge or nailed into the face of the ridge with the top of the rafters flush at the top of the ridge?Joe Carola

   
   

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   Edited 10/17/2006 5:54 pm ET by Framer

1. 
   bruce22 | Oct 18, 2006 02:17pm | #2

   The rafters are being face nailed, I'm holding them up about 1" to provide space for air flow to ridge vent.

1. 
   Framer | Oct 18, 2006 02:28pm | #3

   Bruce,The answer is yes or no!One time I had too pout therm on with a structural beam where the rafters were facenailed.All the other times never.So it could depend on the length of the ridge, pitch of the rafter, span of the rafter, snow load.....etc. You obviously don't have an Architect because he could tell you. Who specked the beam?Joe Carola

   Edited 10/18/2006 7:29 am ET by Framer

2. 
   houseboy | Oct 18, 2006 08:35pm | #4

   As others have said, the type of connection (toenail or metal hanger) needed will depend on the rafter span and spacing along with the design loading (dead load and live load).

   Generally speaking, metal hangers are likely to have more capacity that toenailing but without the data, we can't know how much (or how little) capacity you will need.

   I would not guess there would be a need for strapping over the top though.

   From you description you WILL need vertical load transfer from the rafter to the ridge. The collar ties 6'-6" down probably won't do much if anything. I'm guessing this based on the double 16 inch ridge. I am guessing that is a structural ridge and so collar tie action is not going to be effective. Again, these are only guesses without more detailed information.