Tactile detectable warning ramps for pedestrian pathways

Details Tactile detectable warning ramps for pedestrian pathways Tactile detectable warning ramps for pedestrian pathways

2005-09-06

2005-09-06

Hartmann, Gary S. (Department: 3671)

Road structure, process, or apparatus

Process

Handling or treating preformed modular unit

C404S075000, C052S742100

Reexamination Certificate

active

06939078

ABSTRACT:
A precast concrete slab and framing system is placed in walkways, curb ramps, platform edges, and areas of pedestrian traffic where they intersect with vehicular traffic, warning the visually handicapped of dangerous crossings. The precast slabs, which incorporate raised, truncated domes on the top side and a floated finish on the bottom side, are made to be set in the frame which has been set and cast into fresh concrete. A number of slabs are placed in a frame abutting each other on top of sand and the edges are filled with sand to lock them into place. The top surface is placed to be flush with the walking surface.

REFERENCES:
patent: 1697765 (1929-01-01), Heltzel
patent: 3915582 (1975-10-01), Clarke
patent: 4321024 (1982-03-01), Terraillon
patent: 5277573 (1994-01-01), Sullivan
patent: 5320790 (1994-06-01), Lowe
patent: 5827009 (1998-10-01), Kokoletsos
patent: 5887846 (1999-03-01), Hupp

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