A carpenter is preparing a material take-off for framing a 12.2 m x 9.8 m (outside dimensions) single-story building with 2.4 m high walls. Assuming a stud spacing of 400 mm on centre, double top plates, single bottom plates, and accounting for corner studs and blocking, which of the following is the most appropriate first step in accurately estimating the required number of 2x4 studs for the vertical framing?

Question: A carpenter is preparing a material take-off for framing a 12.2 m x 9.8 m (outside dimensions) single-story building with 2.4 m high walls. Assuming a stud spacing of 400 mm on centre, double top plates, single bottom plates, and accounting for corner studs and blocking, which of the following is the most appropriate first step in accurately estimating the required number of 2x4 studs for the vertical framing?

Answer options: ✅ Calculate the total linear metres of wall and divide by the stud spacing to get the base number of studs.

• Determine the number of 2x4s needed for top and bottom plates only, then add for studs.
• Count the number of outside corners and T-intersections to estimate additional studs.
• Calculate the total perimeter of the building and multiply by 2.5 studs per linear metre.

Correct answer: Calculate the total linear metres of wall and divide by the stud spacing to get the base number of studs.

Explanation: The most appropriate first step for estimating studs is to calculate the total linear metres of wall and then divide by the stud spacing to get a base number. This provides the primary quantity, to which additional studs for corners, intersections, openings, and plates will be added later. Calculating plates first would miss the main vertical stud count.