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Technical Measurements Flashcards

7 cards from real CBI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Under the IRC, the maximum depth of a notch in a sawn lumber floor joist is limited to what fraction of the joist depth?

    Answer: 1/6

    IRC R502.8.1 limits notches to one-sixth of the joist depth and prohibits them in the middle third of the span.

  2. What is the maximum diameter of a hole bored in a sawn lumber floor joist?

    Answer: 1/3 of the joist depth

    Bored holes may not exceed one-third of the joist depth and must be at least 2 inches from the top or bottom edge.

  3. In an exterior or bearing wall, a single stud may be bored to what maximum percentage of its width?

    Answer: 40 percent

    IRC R602.6 allows 40 percent boring in bearing studs, or 60 percent if doubled and limited to two successive studs.

  4. A plumber cuts through more than 50 percent of the width of a top plate in a bearing wall. What does the IRC require?

    Answer: A 1-1/2-inch-wide, 16-gauge galvanized steel tie extending at least 6 inches past each side

    IRC R602.6.1 requires a 0.054-inch (16 ga) steel tie at least 1-1/2 inches wide, fastened with eight 10d nails each side, extending 6 inches past the opening.

  5. Sill plate anchor bolts must be spaced at a maximum of what distance on center in typical IRC construction?

    Answer: 6 feet

    IRC R403.1.6 requires 1/2-inch anchor bolts at maximum 6 feet on center, within 12 inches of plate ends.

  6. What is the minimum embedment depth of a 1/2-inch anchor bolt into concrete or grouted masonry for a sill plate?

    Answer: 7 inches

    IRC R403.1.6 requires anchor bolts to extend at least 7 inches into concrete or grouted cells.

  7. Unless naturally durable or preservative-treated, wood framing members resting on exterior foundation walls must be at least how far above exposed ground?

    Answer: 8 inches

    IRC R317.1 requires wood framing to be at least 8 inches from exposed earth, while siding requires 6 inches.