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Phoenix Central Library: Reading Room Roof

by Michael W. Ishler, (M.ASCE), Ove Arup & Partners Calif, Santa Monica, United States,



Document Type: Proceeding Paper

Part of: Spatial, Lattice and Tension Structures

Abstract:

This paper discusses the design and analysis of the cable truss roof over the fifth floor reading room of the new Phoenix Central Library. Forty pairs of diagonally oriented cable trusses located on a 32 feet-8 inches square grid carry vertical load and provide lateral stability for the precast columns. The top and bottom cable chords of each truss are separated by a pair of vertical flying struts. These struts subdivide the span and support parallel lines of type steel purlins at 16 feet-4 inches on center. A deep metal deck spans between the purlins. Although the roof deck, insulation and weather membranes are of conventional construction, they do not directly touch the columns or side walls. The cable truss network elevates the roof plane above the columns and allows a visual separation between the roof and the side walls.

Subject Headings: Cables | Roofs | Trusses | Structural analysis | Struts | Structural stability | Steel structures

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