For this picture:

http://st.houzz.com/fimgs/6482f39401fa7946_9547-w600-h376-b0-p0--home-design.jpg

For the walls going up to the roof supporting the shed roof on the right, they are 8ft on the right (cut off from the pic) and 14ft on the left side near the middle of the house. Do I run 14' studs up continuous or do I frame 8' walls with a double top plate and then form a triangular type of wall/truss to sit on that plate? I see some comments to just run studs up since the plates are a weak point in the structure, only nailed together.

Building a wall on top of another wall creates a weakened plane like a hinge.  Balloon framing a tall wall will eliminate the hinge.  Since crown bows can be significant in long dimensional lumber, you might want to consider man-made studs.

8-14 feet is the total wall length. is this too long? I am working up a lumber takeoff for a home I am building since most of the lumber yards won't quote it unless I provide it. What is a "man made" stud? I am familiar with TJIs LVLs etc but not an engineered stud. Are SPF engineered studs?

Posted By Surfsup on 12 Oct 2013 09:24 AM
. . . What is a "man made" stud? I am familiar with TJIs LVLs etc but not an engineered stud. Are SPF engineered studs?

Examples:
http://www.bc.com/wood/ewp/simpleFraming/versaStud.html

http://www.woodbywy.com/trus-joist/timberstrand-lsl/

Article about engineered studs:
http://voices.yahoo.com/engineered-...69504.html

Engineered woods:
http://sollunabuilders.com/2012/05/...ered-wood/

Listen to Alton. In Alberta it is against the code to two part frame a wall. Wither or not it is in your jurisdiction, it is unwise to do.
In some cases you can use a column to support a ridge and then infill frame with two parts so in your case you would need a beam for the roof to land on and the right number and size of columns under it. Than you can frame what ever you want for infil.

Good info thanks guys...

May need to be designed as a tall wall. Our code has tall wall rules over 10' height for wind load purposes.
If so, most yards will design and provide the tall wall section if you dont want to sort it out.