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Re: Tuscarora Almanac for September 10

Posted by W.B. on Tue Sep 10 20:03:12 2019, in response to Re: Tuscarora Almanac for September 10, posted by Steve B-8AVEXP on Tue Sep 10 18:55:18 2019.

It wasn't simply the construction methods that were refined. They started using 'WF' steel beams, generally from Carnegie, with a good number of 'H' columns instead of four 'L's riveted to a web plate. Many of those sections that opened between 1936 and 1948 (up to the Euclid Avenue of what you refer to as Abbott & Costello) used what was called 'CB 61' by Carnegie and 'B6a' by Bethlehem Steel, but from what I could tell Carnegie's CB 61's were used in the construction of the newer IND sections (six weights, 40 to 88 lbs.) As well as H3 and H3a sections. (The AISC website has a section devoted to old lists of steel sections from many of the steel companies of old.) It may've been, the I beams you mention, either an H3a beam and a heavier CB 61 every third, or a 40 lb. CB 61 and every third being an 88 lb. or something.

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