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Appletons' cyclopædia of technical drawing (1896)
Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 832
STANDARD I BEAMS. Depth Min. wt.foot. Min.b. Min.t. z. s. P- y- ofbeam. 24 80-00 7-00 •50 3-250 •60 •542 1-142 20 64-00 6-25 •50 2-875 -55 •479 1-029 15 42-00 5-50 -41 2-545 •41 •424 0-834 12 31-50 5-00 -35 2-325 -35 •388 0-738 10 25-00 4-66 -31 2-175 -31 -363 0-673 9 21-00 4-33 -29 2-020 •29 -337…Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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