Design the members of the single-story concentrically braced frame shown below for the given loads:

Design the members of the single-story concentrically braced frame shown below for the given loads:

(a) Perform a nonseismic design, that is, select the lightest members that satisfy the AISC 360 requirements for the factored loads.

(b) Perform a seismic design, that is, select the lightest members that satisfy the AISC 341 requirements for Special Concentrically Braced Frames. (c) Comment on the differences between the designs and explain their causes. For both designs

• Use square HSS Sections with A500 Gr. B (Fy = 46 ksi) for the braces.

• Use W-shapes with A992 Gr. 50 (Fy = 50 ksi) for the beam and columns.

• Assume pin-ended braces and beam and that the beam is continuous between the columns.

• Consider the beam unbraced laterally over its entire length.

• The columns are laterally braced at their tops.

• When using available design aids, to reference the sections, page numbers, and edition of the design aids used.

• Loads shown are unfactored and the lateral loads shown are seismic loads already reduced for the appropriate R value. Only consider the 1.2D + 0.5L + 1.0E load combination.

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