Question

6. What is the length of wall studs when the finished floor-to-ceiling height is 8′, ceiling material is ¾″ thick, the finished floor is ¾″ thick, and it's framed with three plates?
A. 7′9″
***B. 8′1½″
C. 8′
D. 7′7½″

I think the answer is B.

7. A carpenter needs to calculate the correct length of the wall studs for a platform-frame construction. The building will have a finished floor-to-ceiling height of 8′, a ¾″-thick hardwood finish floor, ¾″ furring strips in the ceiling, and ½″ gypsum board on the ceiling. The combined thickness of the top plates and the sole plates is 4½″. What would be the correct stud length for this building?
A. 8′1″
B. 7′10½″
***C. 7′8½″
D. 7′9½″

Is the answer C?

Answer 1

6. You do not say how thick the three plates are

7.
8' + 3/4" + 3/4" + 1/2" = 8' 2" then subtract plates
8' 2" - 4.5" = 7' 14" - 4.5" = 7' 9 1/2"

Answer 2

For 6, they don't tell you the thickness of the three plates.