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Structural Engineering and Materials Flashcards

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

Read the first 7 Structural Engineering and Materials flashcards as text

  1. Under the NDS for wood design (ASD), what load duration factor CD applies to wind or seismic loads?

    Answer: 1.6

    The NDS uses CD = 1.6 for the 10-minute duration of wind and earthquake loads.

  2. How does the compressive strength of sawn lumber parallel to the grain compare with strength perpendicular to the grain?

    Answer: Parallel is much greater

    Wood fibers loaded along their length are far stronger than when they are crushed across the grain.

  3. What mechanism transfers load in a slip-critical bolted steel connection at service loads?

    Answer: Friction between the faying surfaces

    Slip-critical connections use pretensioned bolts, so load passes through friction on the faying surfaces.

  4. What is the effective throat of an equal-leg fillet weld with leg size w?

    Answer: 0.707w

    For a 45° fillet weld, the throat is w·sin45° ≈ 0.707w.

  5. At any point on a beam, the slope of the bending moment diagram equals:

    Answer: The shear force

    dM/dx = V, so the moment diagram's slope equals the shear at that point.

  6. Which principle states that an influence line has the shape of the structure's deflected shape when the response function is released and given a unit displacement?

    Answer: Müller-Breslau principle

    The Müller-Breslau principle builds qualitative influence lines from the released structure's deflected shape.

  7. In the ASCE 7 Equivalent Lateral Force procedure, how is the seismic base shear V calculated?

    Answer: V = Cs·W

    V = Cs·W, where Cs is the seismic response coefficient and W is the effective seismic weight.