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

Trusses with Multi-Panel Diagonal Struts
Haupt 1839: Tripl- intersecting compression struts and half-span diagonal struts.
Long 1839: Optional configuration included a version with multi-diagonal struts.
Howe 1840: Double-intersecting diagonals. Vertical rods.
Pratt & Pratt 1844: Timber chords and verticals with crossed iron diagonals. Four-panel-long strut at ends.
Hassard 1846: Multi-panel struts radiating from abutment. Cross-braced center panels. Single compressive
strut in end panels.
McCallum 1851: Two radiating diagonal struts at each abutment.
Gridley 1852: Half-span diagonal braces. Compression diagonals below brace, cross-bracing above. Iron
verticals at half-panel points.
McCallum 1857: Single diagonal strut at each abutment.
Eikenberry 1861: Half-span struts from abutments. Triple-intersecting struts in web.
Davis, B. 1873: Bowstring configuration. Radiating struts from center of timber bottom chord. Combination
of timber and iron verticals.
Cooley 1878: Half-span diagonals brace with struts between brace and top chord. Single-panel diagonal in
end panels. Vertical rods alongside timber verticals.
Holt 1879: Timber. Sloped top chord. Radiating verticals. Paired diagonals extend across three panels from
abutment to top chord.
Jones, J. H. 1885: Timber. Multi-layered web of inclined verticals and multi-panel diagonals.
Herman Haupt, Patent No. 1,445 (1839)
Thomas Hassard, Patent No. 4,359 (1846)
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