Pony Wall

[Harold Orozco]

I am building a addition with a shed roof on the side of the house. The plans call for a pony wall in between the existing wall studs to support the rafters (2x10's). I am wondering what would be the best way to block the rafters so they don't rotate. Should I do it rim joist style (naling nto the end of rafters) or should I insert the blocking on the sides and toe nail. Existing wall is 2x4's. Thanks

[Brian Hannigan]

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[Mark Hagenlock]

I am building a addition with a shed roof on the side of the house. The plans call for a pony wall in between the existing wall studs to support the rafters (2x10's). I am wondering what would be the best way to block the rafters so they don't rotate. Should I do it rim joist style (naling nto the end of rafters) or should I insert the blocking on the sides and toe nail. Existing wall is 2x4's. Thanks

Harold,
Why aren't you asking the one who drew the plans for you? Or, (because your asking the question) perhaps the answer is in your drawing but you don't recognize it. The best way depends on what you have, and what you are trying to adapt to what you have. I do not mean this in a smarta** way. It depends on......

[John Kogel]

Sometimes X-braces are better than blocking. Back in the day they would be pre-nailed and pounded home after the sheathing is on.
Sometimes joist hangers are better. Hangers would need a ledger board on the supporting wall.

If you can stagger blocking, it is better to nail thru the rafter into the block vs toenails.
Blocking restricts air flow. How will you ventilate the rafter cavities?