An equal-tangent crest curve has been designed for 70 mi/h to connect a +2% initial grade and a -1% final grade for a new vehicle that has a 3 ft driver’s eye height; the curve was designed to avoid an object that is 1 ft high. Standard practical stopping distance design was used but, unlike current design standards, the vehicle was assumed to make a 0.5g stop, although driver reactions are assumed to be the same as in current highway design standards. If the PVC of the curve is at elevation 848 ft and station 43 + 48, what is the station and elevation of the high point of the curve?

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0 6 months 0 Answers Reply 12 views

The structural steel column shown in figure below is fixed at its base and free at its upper end. At the top of the column, a load P = (15 + 0.05R) kip is applied to the stiffened seat support at an eccentricity of e = 9in from the cross-sectional x-axis of the I-section shape. Analyze using the AISC equations and allowable stress method to determine whether the column is safe under the applied eccentric load. Assume E = 29000 ksi and sigma_{y} = 36ksi The area of cross-section A = 10.45i * n ^ 2 the moments of inertia I = 122.671 in and 1=42.692in of the I-section.

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0 8 months 0 Answers Reply 6 views