Answer the following questions using the specifications, drawings, and schedule provided. Attach sheets showing your calculations.
Specifications:
- Floor joists set on 2×6 pressure-treated sill, which is anchor-bolted to the foundation wall.
- Floor joists will be doubled under interior walls parallel to the load-carrying joists.
- The Dining Room and Living/Family Room interior openings into the corridor are 4’ width.
- Exterior walls are 2×6 stud walls spaced at 24” o.c.
- Interior walls are 2×4 stud walls spaced at 16” o.c.
- All stud walls have single bottom plates and double top plates.
- Allow for additional studs as follows:
- 2 additional studs for each corner
- 2 additional studs for each wall intersection — for intersections of exterior and interior walls, include these studs in the exterior wall count
- 3 additional studs for each wall opening
FLOOR PLAN
| 5 ft. |
- Board-feet of 2×6 pressure treated sill = _____
- Board-feet of 2×12 in the girders = _____
- Board-feet of header joists (also called rim joists) = _____
- Board-feet of the spanning joists. Drawing details indicate that 12’ lengths are OK for all bays of spanning joists. Total board feet to order for all of these joists = _______
- Number of metal x- bridging pairs required (assume each spanning joist must have lateral support at mid span) = ________
- How many sheets of plywood are required for the floor system subflooring? (round up to the next whole number of sheets)? ________
- Linear feet of bottom plate for exterior stud walls = __________
- Linear feet of top plate for exterior stud walls = ________
- Number of studs required in the exterior walls before adding extras = _____
- How many extra studs for openings, corners, and intersections in exterior walls? _______
- Headers over exterior wall openings will be constructed from three 2×12’s. How many LF of 2×12 will be required for these headers in exterior walls? _______
- How many linear feet of interior walls? _______
- How many linear feet of 2×4 for top and bottom plates? ______
- How many studs in interior walls before adding extras? ______
- How many extra studs for openings, corners, and intersections in interior walls? ______
- Headers over interior wall openings will be constructed from two 2×12’s. How many LF of 2×12 will be required for headers over openings in interior walls? ______
- How many sheets of plywood or OSB will be required to sheath exterior walls if the wall height is 8’? Calculate each wall separately, rounding up to the next whole number of sheets for each wall. _____
Questions 18 through 23 use a different structure with different drawings, dimensions, and specifications (shown below).
Specifications:
- The building footprint measures 22’ x 60’ with gable ends.
- Ceiling joists are 2×8’s spaced at 16” o.c.
- Two 12’ long ceiling joists span the 22’ width of the building.
- Rafters are 2×10’s spaced at 24” o.c.
- The horizontal projection of the rafters extends 2’ beyond the exterior walls.
- The length of the ridge board is 60’ of 1×12’s.
- Roof slope is 4:12.
Ridge Board
| Two, 12’ lengths of 2×8 at 16” o.c. for ceiling joists |
| Rafters |
| 2’ |
| 22’ |
- How many 12’ lengths of 2×8 are required for the ceiling joists? ________
- What is the length of a finished rafter? ________
- What standard length 2×10 must be used for each rafter? ________
- How many 2×10 rafters are needed? ________
- How many board feet of ridge board? ________
- How many sheets of plywood or OSB will be needed to sheath the roof (not including waste)? _____
