Monolithic cast bridge

Details Monolithic cast bridge Monolithic cast bridge

1995-09-15

1997-01-07

Lisehora, James A.

Bridges

Arch

52 87, 52 88, E01D 400, E01D 1800

Patent

active

055904335

ABSTRACT:
A monolithic cast bridge broadly includes a unitary, monolithic structure (12) having a pair of spaced haunches (14, 16) a span (18) having upper and lower surfaces (20, 22) and a pair of axially extending webs (24, 26). Haunches (14, 16) define support-engaging undersides (28, 30) which are provided for supporting the bridge above a support level (48). The lower surface (22) of the span (18) extends upwardly from each of the haunches (14, 16) to present a maximum rise relative to the haunch undersides (28, 30) at a midpoint (50) of the span (18). The webs (24, 26) are spaced and substantially parallel with respect to each other, and respectively include lower surfaces (52, 58). The lower surfaces (52, 58) are substantially flat and correspond to the haunch undersides (28, 30). A pair of reinforcement cables (64, 66) are advantageously positioned within respective webs (24, 26), and are configured for reinforcing the structure (12) along its longitudinal axis.

REFERENCES:
patent: 230933 (1880-08-01), Fryer, Jr.
patent: 309063 (1884-12-01), Kellogg
patent: 459301 (1891-09-01), Murphy
patent: 542531 (1895-07-01), Ogle
patent: 743946 (1903-11-01), Spaulding
patent: 2370763 (1945-03-01), Whitney
patent: 2984944 (1961-05-01), Sapp
patent: 3768108 (1973-10-01), Wadsworth
patent: 4563107 (1986-01-01), Peterson
patent: 5199819 (1993-04-01), Matiere

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