Transcription of Design Example 1 Cantilevered Overhead Sign Support ...
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Design Example 1 Cantilevered Overhead Sign Support ...
Design Example 1. Cantilevered Overhead Sign Support - Truss with Post Problem statement: Location: I-85 Atlanta, GA. Design a structure to Support a sign 22 ft. long and 11 ft. high. The distance from the center of the upright to the center of the sign is 24 ft. The distance from the base of the post to the center of the sign is 23 ft. and no walkway is included. Use API-5L-X52 round steel pipe (Fy=52 ksi) for the main structure members and ASTM. A-53 Grade B pipe for the secondary members. Use AASHTO M314-90 Grade 55. anchor bolts. The structure would cross a lifeline travelway should it collapse. Reference:E:\BT\Projects\NCHRP 10-80\Examples\Release\ (R). Several commonly-used functions are stored in a separate include file that is used in multiple Example problems. These include functions to determine Cd and resistance values for flexure, shear, and torsion for common steel shapes.
Truss: htruss:=23ft Height at which the truss frames into the post (centroid). ltruss:=35ft Length of the truss. lpanel:=4ft Length and height of a truss panel. dtruss:=3ft Depth of the truss along the z-axis. The following section properties are from the AISC Steel Design Manual. Assume that the truss …
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