On a set of residential floor plans drawn at 1/4 inch = 1 foot, what does a measured wall length of 5-1/2 inches represent in the field?
Planning And Estimating
Question · Easy
Six feet: a hard-hat anthem
Short
How many board feet of 2x10 lumber are in 18 pieces each 16 feet long?
Question · Medium
A 28-foot exterior wall is framed with 2x6 studs at 16 inches on center. How many studs are required for the wall itself, excluding corners and intersections?
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When taking off materials from a plan set, which item is typically ordered by the square (100 square feet)?
A framer estimates 1,200 board feet of 2x6 needed for a wall job. The lumber supplier quotes $640 per thousand board feet. Adding a 15% waste factor, what is the total lumber cost?
Question · Hard
OSHA fall heights, to scale
Which stud runs full height from the bottom plate to the top plate alongside a door opening, while a trimmer (jack stud) supports the header?
Structural Framing
For a 6-foot-wide exterior door opening in a 2x6 bearing wall, what is the minimum trimmer (jack) stud count typically required at each end of the header per common framing practice?
What is the primary reason floor joists are installed at standardized spacings such as 16 or 24 inches on center?
A common rafter has a total run of 14 feet and a total rise of 9 feet 6 inches. Using the Pythagorean theorem, what is the theoretical rafter length (excluding overhang)?
What is the functional difference between a ridge board and a ridge beam in a stick-framed roof?
What is the purpose of the birdsmouth cut on a common rafter?
On a wood structural panel shear wall, what is the typical edge-nailing spacing required along panel edges to develop the rated shear capacity?
When cantilevering an engineered wood I-joist to support a balcony or bump-out, what is the general industry rule for the maximum cantilever distance without special engineering?
What are the short studs called that fill the space between the top of a window header and the double top plate?
During truss erection, what is the purpose of temporary diagonal bracing installed across the top chords?
A straight-run stair has a total rise of 9 feet 6 inches. Using a 7-1/2 inch riser height, how many risers are required?
General Framing
When bolting a deck ledger to the house band joist, what must be installed behind the ledger to prevent water damage to the house structure?
A stair has 15 risers at 7-5/8 inches each. Using the common comfort formula (2R + T = 25), what is the ideal tread depth?
What is the standard spacing for vertical 2x2 or 2x4 furring strips installed against an interior masonry wall to receive paneling or drywall?
What is the primary purpose of wood blocking installed between floor joists or wall studs?
Under the current Cal/OSHA residential framing fall protection rule (effective July 2025), at what height above a lower level must fall protection be provided for framers on a wood frame?
Safety
A straight (extension) ladder is set up to reach a high wall. What is the correct ratio of base distance from the wall to vertical height?
Per Cal/OSHA Title 8, when is a supported scaffold required to have ties installed to the building during erection?
When operating a pneumatic nailer on a framing deck, what is the minimum personal protective equipment typically required for the operator?
On a residential framing site using portable power tools, what device is required on the temporary power circuit to protect workers from shock?
On a floor plan, a door symbol with an arc typically indicates what information for the framer?
A room measures 24 feet by 30 feet. How many 4x8 sheets of 3/4-inch tongue-and-groove subfloor are required to cover it, ignoring waste?
A takeoff calls for 40 studs at 8 ft, 8 plates at 10 ft, and 6 header pieces at 12 ft, all 2x6. What total linear footage of 2x6 stock is most efficient to order including about 20 lf of waste allowance?
Why is the top plate of a bearing wall typically installed as a double plate rather than a single?
A framing bid shows $12,400 in lumber, $3,600 in fasteners, and 84 labor hours at $58/hour. Adding 15% overhead on labor only, what is the bid total?
What is the function of a rim (band) joist in a wood floor system?
Why must an LVL (laminated veneer lumber) beam be installed with the tall dimension vertical?
On a hip roof, how does a hip rafter differ from a common rafter?
A hip rafter on a 24-foot-square building with a 6/12 pitch runs from the corner to the ridge. What is the theoretical hip rafter length, ignoring overhang?
What is the purpose of collar ties installed in the upper third of a stick-framed roof?
What minimum bearing length is typically required under a wood floor girder where it rests on a wood stud or post?
What is the function of a holdown (tie-down) device at the end of a shear wall?
A post delivers a 2,400-pound point load onto a double 2x6 header with a net bearing area of about 18 square inches. What is the compressive stress perpendicular to grain on the header?
What is the advantage of an engineered wood shear panel (prefabricated shear wall segment) over a let-in wood brace?
Which is a typical advantage of roof trusses over stick-framed rafters and ceiling joists?
A 36-inch-wide residential stair with 2x treads is typically framed with how many cut wood stringers?
For an exterior wood deck using 2x10 floor joists, what is the typical maximum cantilever allowed beyond the supporting beam without special engineering?
Per typical residential building code, what is the maximum vertical rise allowed for a straight stairway without an intermediate landing?
What is the purpose of lateral tie-back hardware on a freestanding wood deck post-to-beam connection?
When installing wood furring on a ceiling to receive drywall, what fastening method is most common for attaching the furring to the underside of wood joists?
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