Interactive Sample Project: Pedestrian Bridge

Step 12: Concept Design Analysis

Valuable Information
w = 8.854 lb/in
L = 96 lb/in
E = kip
I = in4

  • Is δmax less than or equal to δo = L/500? [1]

    Correct:

    Incorrect:

    δmax =  in  >  δo = 0.192 in
    Because the max deflection δmax is larger than the allowable deflection δo, you cannot proceed with this design, but you may alter the design in the following ways:
    1. To choose a stiffer material, Sreq, return to Step 2: Materials Selection,
    2. To choose a cross section with larger I, return to Step 1: Concept Selection and select a different type of cross-section, or return to Step 8: Beam Selection and select larger dimensions.
< < Back to Step 11: Concept Design Analysis Continue to Step 13: Analysis: Dead Load >>
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This material is based upon work supported by the National Science Foundation under Grant No. 0633602. Any opinions, findings and conclusions or recomendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation (NSF).

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