Occasional Electronic Publication No. 1 - Society for Industrial ...
Occasional Electronic Publication No. 1 - Society for Industrial ...
Occasional Electronic Publication No. 1 - Society for Industrial ...
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Pennington- -Platt<br />
Pennington, Cunningham<br />
7,890 Jan. 7, 1851 Timber continuous truss. Parallel chords. Two-span undulating arches<br />
superimposed. Individual spans have additional arches and reversed<br />
arches. Web contains overlapping opposite sloping diagonals.<br />
Convoluted overkill.<br />
Pennsylvania Truss<br />
<strong>No</strong>t patented ca. 1875 Long-span sub-divided Pratt truss configuration with polygonal upper<br />
chord. Named <strong>for</strong> railroad company that popularized this <strong>for</strong>m.<br />
Configuration occasionally referred to as a Pettit truss.<br />
Perry, Oliver & William Allen<br />
120,319 Oct. 24, 1871 *Tied arch. Pairs of vertical web members radiate from a series of common<br />
points along bottom chord. <strong>No</strong> diagonals.<br />
Petersen, Richard<br />
671,923 Apr. 9, 1901 *Bracing under bridge deck <strong>for</strong> unbalanced loads. German origin.<br />
Pettit, Henry<br />
136,177 Feb. 25, 1873 Deck-beam to truss chord connection detail. Labeled “bridges.”<br />
Pettit Truss<br />
<strong>No</strong>t patented ca. 1871 Long-span subdivided Pratt truss. An alternate name used <strong>for</strong> both the<br />
Pennsylvania and Baltimore trusses. Often misspelled as “Petit.” Henry<br />
Pettit was an engineer in the employ of the Pennsylvania Railroad at the<br />
time the truss configuration was developed.<br />
Pfeifer, Charles<br />
121,894 Dec. 12, 1871 *Tied arch. Latticed upper chord. Draped and horizontal ties. Web<br />
verticals. <strong>No</strong> diagonals.<br />
Phillips, James – see Price & Phillips<br />
Phillips, John<br />
440,437 <strong>No</strong>v. 11, 1890 Parallel trussed beams support planking <strong>for</strong> a deck. Each beam is a very<br />
shallow king-post truss configuration. Labeled “bridge.”<br />
Pierce, Jacob<br />
141,458 Aug. 5, 1873 *Cable anchoring system <strong>for</strong> a bridge that has an inverted bowstring<br />
truss at mid-span, hung from arch-supported side trusses. Cables are<br />
anchored in the abutments and follow the contiguous curves of the<br />
arches.<br />
Piper, John – also see Linville & Piper (Piper & Schiffler, Pittsburgh, Pa.; Keystone Bridge Co., Pittsburgh,<br />
Pa.)<br />
33,542 Oct. 22, 1861 Bearing block detail between verticals and chords. Labeled “truss<br />
bridge.”<br />
132,410 Oct. 22, 1872 *Drawbridge detail. Turning gear.<br />
Platt, Charles<br />
541,213 Jun. 18, 1895 *Concrete jack-arch deck system. Labeled “bridge part.”<br />
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