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 10 — Bearings, Expansion Joints, and Restraint Systems (15 questions)
15 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.
- Q1
Shape factor S for a 14×22-in pad with 0.5-in interior layer.
-Elastomeric bearing
- Q2
Method A compressive stress limit with G = 0.13 ksi and S = 8.56.
ksi - Q3Which layer must the steel-laminated elastomeric bearing NOT have at its outer face?
- Q4
Thermal movement of a 320-ft steel-composite bridge with ΔT = 110°F, α = 6.5×10⁻⁶ /°F.
inStrip-seal joint
- Q5Modular joints are typically selected when total movement exceeds:
- Q6
Elastomer shear strain γ = Δ/h_rt for Δ = 1.5 in, h_rt = 3.0 in.
- - Q7
Pot bearing friction load: R = 800 kip, μ = 0.05.
kip - Q8AASHTO Procedure A design temperature for steel superstructure in a moderate climate:
- Q9
Number of 3-in-capacity modules needed for 7.7-in total movement.
- - Q10Which bearing type is best suited for very large uplift forces?
- Q11
Design compressive stress on the pad from R = 500 kip, plan 12×24 in.
ksi - Q12
Longitudinal wind force on 800 ft² exposed area at V = 115 mph.
kip - Q13The primary purpose of the pedestal beneath a bearing is:
- Q14
Concrete deck expansion Δ (in) for L = 300 ft, ΔT = 100°F, α = 6.0×10⁻⁶.
in - Q15AASHTO §14.7.5 (Method B) requires the shape factor S to satisfy:
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