This educational application supplements, but does not replace, the official AASHTO LRFD Bridge Design Specifications, applicable state DOT manuals, project specifications, and professional engineering judgment.
Graded quiz
Chapter 18 — Bridge Construction Engineering (8 questions)
Chapter 18 — Bridge Construction Engineering (8 questions)
8 questions · PE-exam format · 70% to pass · attempts save to your progress record when signed in.
Work each item to the requested precision. Use the Show clue button only after an honest attempt — hints reveal the AASHTO section and setup, not the answer.
- Q1AASHTO LRFD §3.4.2 construction-load combination Strength I uses γ_DC and γ_CE (construction equipment) of:
- Q2Segmental concrete bridges built by balanced cantilever must be checked at each construction stage for:
- Q3Constructibility check (§6.10.3): steel I-girder top flange during deck pour. F_u = 50 ksi. Compute the maximum permitted flange stress = 0.95·R_h·F_y for R_h = 1.0 (ksi).ksi
- Q4Falsework post check. Axial load P_u = 120 kip, unbraced length L = 12 ft, r = 1.5 in. Compute slenderness KL/r using K = 1.0.-
- Q5Camber for a composite steel girder is designed to compensate for:
- Q6Balanced cantilever unbalanced moment. Segment weight W = 100 kip at arm a = 40 ft (one side heavier by one segment). Compute unbalanced moment ΔM (k-ft).k-ft
- Q7The incremental launching method (ILM) requires special attention to:
- Q8Lifting/rigging factor of safety per AASHTO Construction Specs. Rated capacity of a crane R = 200 kip. Compute allowable lift W_allow with FS = 3.0 required for a critical lift (kip).kip
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