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- To: seaint(--nospam--at)seaint.org
- Subject: Steel Section Properties
- From: Roger Turk <73527.1356(--nospam--at)compuserve.com>
- Date: Fri, 1 Dec 2000 11:55:19 -0500
Frank, My AISC Manual, 5th Edition, Copyright 1947, Twentieth Printing 1956, says in the preface, "In Part I. the tables of available rolled shapes have of necessity been radically revised, to conform to the lists agreed upon by industry since the close of the war and contained in 'Simplified Practice Recommendation R-216-46' of the United States Department of Commerce, National Bureau of Standards, issued February, 1946." I would therefore venture a guess that the designer was using an older AISC (or other) manual (as some of us are wont to do when a new manual comes out), so I would presume that the following sections were provided in lieu of the specified sections: 10WF39 for 10WF37 12WF27 for 12WF25 27WF94 for 27WF91 Allowable Tension Stress in bending: 20,000 psi Allowable Compression Stress in bending: ld/bt <= 600 20,000 psi ld/bt > 600 12,000,000/(ld/bt) where, l is the unsupported length of the compression flange, d is the depth of the member b is the flange width t is the thickness of the compression flange >From 1939 - ~1960, the structural steel for bridges and buildings was A7, with a specified minimum yield strength of 33,000 psi. Hope this helps. A. Roger Turk, P.E.(Structural) Tucson, Arizona Frank Tehrani wrote: >>Hi everybody, 1- I have call out for three steel sections in an old structural plan which I couldn't find in my references: i- 10WF37 ii- 12WF25 iii- 27WF91 I appreciate if somebody would help me please to get properties of these sections. 2- On the same set of plans, some steel sections for composite beams are not specified (actually that part of plans is missed). Is there any non-destructive & non-expensive procedure to figure out steel dimensions inside the concrete? 3- What about Fy? How can we validate yield stress of those sections? Thanks in advance, Frank<<
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