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Blackman & Blackman 1864: Timber with crossed-braced diagonals. Vertical rods. Post-tensioning rope
below bottom chord.
Cole & Soule 1866: Threaded iron-rod bottom chord. Timber compression members.
Corey 1867: Timber diagonals notched into chords between vertical rods.
White, T. B. 1867: Iron. Built-up hollow sections for chords and diagonals.
Rust & Herrmann 1868: Iron. Inclined end posts.
Thompson 1868: Iron. Curved top chord. Crossed diagonals. Multi-bar chords.
White, T. B. 1869: Iron. Four piece, concave, quarter-arc, diagonal struts and end posts.
Ensign: 1869: Chords are trussed beams. Diagonals and verticals are not to same points on chords.
Cartter 1870: Timber top chord and web bracing. Lower chord of interlocking iron plates.
McDowell 1870: Timber chords and splayed crossed diagonals. Vertical rods. Double-sloped top chord in
end panels.
Burke 1871: Steep-pitched diagonals. Rod verticals and reversed, sloped diagonals.
Cartter 1872: Timber top chord and crossed diagonals. Wrought-iron bottom chord and verticals. Special
shoe connects bottom chord, end post, vertical rod, and timber diagonal.
Anderson 1873: Bottom-chord bars lapped and secured by threaded lateral rods and nuts.
Bower 1873: Single timber diagonal in all panels. Vertical rods. Cambered chords.
Bogardus 1874: Curved-chord truss with Howe, Pratt and double Warren characteristics. Pipe used for
compression diagonal contains a tension rod. Panel lengths increase toward mid-span, which permits
diagonals to be parallel.
Densmore 1877: Timber top-chord. Number of bars in bottom chord increase toward mid-span.
Irelan 1877: Timber. Sloping roof-truss type chord. Mid-height struts parallel to top chord.
Gorrill 1880: Center panels of timber top chord have a sub-chord.
Fritz 1884: Timber chord and crossed diagonals. Paired vertical rods. Multi-rod bottom chord.
Carr & Carr 1885: Timber top chord and diagonals. Bottom chord and verticals are rods.
Buckley 1887: Timber chords, plus wire cables underneath bottom chord.
Lane 1890: Chords and diagonals are used rails. Verticals are rods.
Weiss 1893: Lengths of all members are adjustable.
Howe Configurations
Greiner 1894: Truss members are used rails. Single diagonal in panels.
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