Illinois Society of Architects · Chicago · leaf 430
umn, and r is the correspondingleast radius of gyration of the section,both in inches. For main compression members, theratio //;• shall not exceed 120, and forbracing and other secondary members,200. (c) Bending: On extreme fibres ofrolled shapes, and built up sections,net section, if lateral… … Metropolitan and Eitel Bldgs. C. W. & Geo. L. Kapp, Architects 7000 TONS McClintic-Marshall Companysteel structures First National Bank Building CHICAGO 428 The laterally unsupported length ofbeams and girders shall not exceed40 times b the width of the compres-sion flange. On extreme fibres of…
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