Occasional Electronic Publication No. 1 - Society for Industrial ...

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A-Frame A sloped top chord variation of the Howe truss. A common roof truss configuration occasionally used as a bridge truss. Diagonals are compression members and verticals are tension members. PATENT CHRONOLOGY Baker 1869: Timber except for vertical rods. Top chord extends past bottom chord to masonry buttress. Warner 1872: Timber top chord and diagonals. Iron bottom chord and vertical hangers. Waddell 1894: Steel. Charles Warner, Patent No. 130,959 (1872) J. A. L. Waddell, Patent No. 529,220 (1894) 106
King-Post Configurations The term “king-post” is often a misnomer, as in most situations the vertical is not a post, but a tension member. When inverted, the vertical is a true post because it is in compression. Some historians have referred to Howe configurations having only one diagonal in each panel as “multiple king-posts.” PATENT CHRONOLOGY McCurdy 1870: Curved top chord. Reiling 1873: Timber with tension iron vertical. Diagonal timber struts. McDonald 1876: Timber king-post superimposed on a Vierendeel configuration with three horizontal chords. Coultas 1877: Inverted king-post configuration with compression post and tension diagonals. Sherman 1877: Inverted king-post configuration with compression post and tension diagonals. Sullivan, Kessler & Foster 1880: Timber chords. Vertical is a double rod. Ramsey 1888: Inverted. Deck bridge. Chord members are rails. McGiffin 1890: Timber with rod vertical. McPherson 1882: Timber. Vertical rod. Wire-rope lower chord. Paisley 1889: Parallel-chord, two-panel Howe. Tubular chords. Vertical rod. Has the appearance of a kingpost within a rectangular configuration. Fenn 1894: Vertical rod is kinked to bypass bottom chord and connect directly to floor beams. Davis 1897: Inverted. Deck truss. Top chord is a wide-flange beam with the lower flange peeled off to form the bottom chord. 107
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Occasional Electronic Publication N
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Table of Contents Foreword.........
Page 5 and 6:
Introduction: American Truss Bridge
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make the competition profitable. Sq
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Part I Abstracts of American Truss
Page 12:
A Abbott, Job - see Hammond & Abbot
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Beard- -Boles Beard, James 41,594 F
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Briggs, J.- -Butterworth Briggs, Jo
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Clarke- -Coultas Clarke, Thomas & A
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Derrom- -Duval Derrom, Andrew 48,53
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F Farnsworth, Edwin 159,084 Jan. 26
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G Gassaway, Samuel 5,297 Sep. 18, 1
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H Hagg, Lewis - see Webb & Hagg Hal
Page 35 and 36:
Hendrick - -Horton Hendrick, Peter
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I Ibel, Justus 250,921 Dec. 13, 188
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K Kandeler, G.F. Theodore 343,377 J
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L Laird, John (John Laird & Co., Ca
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Long- -Lowthorp Long, Stephen (cont
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McKay- -Mitchell, H. McKay, John 90
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Moyer- -Murphy-Whipple Moyer, Abrah
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P Paisley, John 400,704 Apr. 2, 188
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Post- -Pulliam Post, Andrew (Atlant
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Ruick- -Rust Ruick, Thomas 188,678
Page 64 and 65: Sherman- -Snyder, Antes Sherman, Ev
Page 66: Stone- -Sylvester Stone, Joel 484,6
Page 69: Truesdell- -Trumbull Truesdell, Luc
Page 73 and 74: W Waddell, John A. L. - also see Wa
Page 75: White, T.- -Woodruff White, Timothy
Page 78 and 79: Part II Patent Chronology Ordered b
Page 80 and 81: # McGuffie 1861: Iron bowstring wit
Page 82 and 83: PATENT CHRONOLOGY Lattice Configura
Page 84 and 85: Lattice Configurations Lucius E. Tr
Page 86 and 87: Wall 1881: Half-hip variation. No h
Page 88 and 89: Bowstring Configurations Not all bo
Page 90 and 91: Laird, J. 1869 (Patent No. 94,321):
Page 92 and 93: Bowstring Configurations - Trusses
Page 94 and 95: Howe Configurations A Howe truss is
Page 96 and 97: Howe Configurations William Howe, P
Page 98 and 99: Trusses with Multi-Panel Diagonal S
Page 100 and 101: Suspension Trusses Frederick H. Smi
Page 102 and 103: Trusses with Inclined Verticals Joh
Page 104 and 105: Lenticular Configurations James Bar
Page 106 and 107: Indefinable and One-of-a-kind Fanci
Page 108 and 109: Indefinable and One-of-a-kind Fanci
Page 110 and 111: Sellers 1873: Equalateral triangles
Page 112 and 113: Pratt Family of Trusses with Multi-
Page 116 and 117: King-Post Configurations Arnold Rei
Page 118: Queen-Post Configurations August Bo
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