Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Prefabricated unit construction modular bridging system










Image Number 5 for United States Patent #4912795.

A prefabricated modular unit construction bridging system in which all components are identical and interchangeable to meet any variation of span, width of roadway, number of lanes of traffic, and live load specification for any temporary, semi-permanent, or permanent bridge. The bridge is capable of being dismantled and the individual modular components used elsewhere to form a new bridge. The panels, when connected end-to-end to form the main load-bearing trusses of the bridge side girders, are of such a shape that they can be pinned together at their bottom chord level to support the standard cross-beams and modular deck units/bracing throughout the bridge and provide gaps between adjacent panels at their top chord level into which can be pinned other standard chord units of such a length calculated to eliminate entirely both the natural pin-hole deflection inherent in 2-pinned modular truss structures and the elastic deflection under dead load. Some or all of the elastic deflection due to live load may also be eliminated. Also, the same shaped basic panels can be up-turned to form a second story of panels in double story truss constructions. The bottom chords of the up-turned panels form the top chord of each truss of the side girders, and the bottom chord of the lower panels form the bottom chord of each truss of the side girders.








 
 
  Recently Added Patents
Digital microwave radio link with adaptive data rate
Control system of substrate processing apparatus, collecting unit, substrate processing apparatus and control method of the substrate processing apparatus
Semiconductor arrangement with a solder resist layer
Modular connector for touch sensitive device
EpCAM as a reprogramming factor for non-pluripotent cells
Polyureas made from aminocrotonates and enaminones
Fan guide
  Randomly Featured Patents
Bootstrapping technique for distributed object client systems
Composition for promoting healthy bone structure
Method of making an electrochemical cell having a resealable vent closure
Process for the liquefaction of coal
Downhole instrument including a flexible probe which can travel freely around bends in a borehole
Disposable gate/replacement gate MOSFETs for sub-0.1 micron gate length and ultra-shallow junctions
Method of and system for automatic object display of volumetric computed tomography images for fast on-screen threat resolution
Hierarchical test access port architecture for electronic circuits including embedded core having built-in test access port
Bingo game apparatus
Inrush current control method using a dual current limit power switch