An inspector wants to see how the footing, foundation wall, sill plate, floor framing and wall framing fit together vertically. Which drawing shows this best?
- A floor plan
- A site plan
- A window schedule
- A wall section
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D. A wall section
A section is a vertical cut through the building that shows how components stack and connect from footing to roof. A floor plan shows horizontal layout and cannot show the vertical assembly.
Reference: Construction drawing conventions (plan reading): sections and details
On a floor plan, what does a dashed (hidden) line most commonly represent?
- An object above or below the cutting plane, such as a beam or roof overhang
- The centerline of a column, a wall or a round plumbing fixture
- A wall that is to be built of masonry instead of wood framing
- A break in the drawing where part of the building is not shown
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A. An object above or below the cutting plane, such as a beam or roof overhang
Dashed lines show items that are hidden from the view, such as a beam or an upper cabinet above the cut, an overhang, or a footing below a slab. Centerlines use a long-dash, short-dash pattern, and a break is shown with a break line.
Reference: Construction drawing conventions (plan reading): line types
A door on a floor plan is tagged 2868. What size is the door?
- 28 inches wide by 68 inches high
- 2 feet 6 inches wide by 8 feet 8 inches high
- 2 feet 8 inches wide by 6 feet 8 inches high
- 26 inches wide by 88 inches high
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C. 2 feet 8 inches wide by 6 feet 8 inches high
Door and window tags give width then height in feet and inches: 2868 is 2'-8" by 6'-8", or 32 by 80 inches. Reading the digits as plain inches (28 by 68) is the common mistake.
Reference: Construction drawing conventions (plan reading): door and window designations