Seismic expansion joint cover assembly
First Claim
1. A seismic expansion joint cover installation comprisingfirst and second portions of a building floor spaced apart to define a gap between them,a rectangular floor bridge panel adapted to span the gap in all relative positions of the first and second floor portions and having a first end, a second end and spaced apart sides,first elongated linear slide bearing means interposed between the floor bridge panel adjacent the first end thereof and the first floor portion and supporting the floor bridge panel on the first floor portion for horizontal movement thereof relative to said first floor portion in the direction of a second axis parallel to the gap and for limited horizontal movement thereof in the direction of a first axis perpendicular to the second axis and for limited upward vertical movement thereof relative to the first floor portion,second elongated linear slide bearing means interposed between the floor bridge panel adjacent the second end thereof and the second floor portion and supporting the floor bridge panel on the second floor portion for horizontal movement thereof relative to second floor portion in the direction of the first axis and for limited horizontal movement thereof in the direction of the second axis and for limited upward vertical movement thereof relative to the second floor portion,a cover plate frame affixed to the second floor portion and having side members closely adjacent the sides of the floor bridge panel and an end member spaced apart from the second end of the floor bridge panel so as to permit movement of the floor bridge panel relative to the cover plate frame in the direction of the first axis,a second cover plate supported by the cover plate frame and by a portion of the floor bridge panel adjacent the second end thereof, andmeans for coupling the second cover plate to the cover plate frame for preventing horizontal movements of the second cover plate relative to the cover plate frame while permitting at least a portion of the second cover plate to lift from supported relation on the cover plate frame upon relative tilting movements of the floor portions and the floor bridge panel in an earthquake.
1 Assignment
0 Petitions
Accused Products
Abstract
A seismic expansion joint cover includes a floor bridge panel having mutually perpendicular elongated U-shaped bearing receiver guideways adjacent its opposite ends slidably supported by linear bearings affixed to the floor portions on opposite sides of the gap. The receiver guideways are open vertically to allow the floor bridge cover to displace vertically. A cover plate frame defines the boundaries of a floor recess that receives portions of the floor bridge panel in all relative positions of the floor portions as the width of the gap changes. The portion of the floor bridge panel that overlies the gap is covered by a first floor cover plate, and the recess and the remaining portion of the floor bridge plate are covered by a second floor cover plate, which is supported by the cover plate frame and by the portion of the floor bridge panel that it overlies. The second cover plate is resiliently attached to the cover plate frame so that it can lift up and ride over the first cover plate when the gap narrows. The floor bridge panel is resiliently held down so that it cannot be dislodged altogether from the bearing receivers but can lift up and tilt relative to both floor portions. A movable transverse support beam supports the portion of the second cover plate that covers the portion of the recess not occupied by the floor bridge panel and into which the panel can move when the gap narrows.
37 Citations
58 Claims
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1. A seismic expansion joint cover installation comprising
first and second portions of a building floor spaced apart to define a gap between them, a rectangular floor bridge panel adapted to span the gap in all relative positions of the first and second floor portions and having a first end, a second end and spaced apart sides, first elongated linear slide bearing means interposed between the floor bridge panel adjacent the first end thereof and the first floor portion and supporting the floor bridge panel on the first floor portion for horizontal movement thereof relative to said first floor portion in the direction of a second axis parallel to the gap and for limited horizontal movement thereof in the direction of a first axis perpendicular to the second axis and for limited upward vertical movement thereof relative to the first floor portion, second elongated linear slide bearing means interposed between the floor bridge panel adjacent the second end thereof and the second floor portion and supporting the floor bridge panel on the second floor portion for horizontal movement thereof relative to second floor portion in the direction of the first axis and for limited horizontal movement thereof in the direction of the second axis and for limited upward vertical movement thereof relative to the second floor portion, a cover plate frame affixed to the second floor portion and having side members closely adjacent the sides of the floor bridge panel and an end member spaced apart from the second end of the floor bridge panel so as to permit movement of the floor bridge panel relative to the cover plate frame in the direction of the first axis, a second cover plate supported by the cover plate frame and by a portion of the floor bridge panel adjacent the second end thereof, and means for coupling the second cover plate to the cover plate frame for preventing horizontal movements of the second cover plate relative to the cover plate frame while permitting at least a portion of the second cover plate to lift from supported relation on the cover plate frame upon relative tilting movements of the floor portions and the floor bridge panel in an earthquake.
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29. A seismic expansion joint cover assembly for spanning an elongated gap between first and second portions of a building floor on opposite sides of the gap, comprising
a first elongated retainer adapted to be affixed to the first portion of the floor and defining a second axis, a second elongated retainer adapted to be affixed to the second portion of the floor and defining a first axis perpendicular to the second axis, a rectangular floor bridge panel adapted to span the gap in all relative positions of the first and second floor portions and having a first end, a second end and spaced apart sides, first elongated linear slide bearing means interposed between the floor bridge panel adjacent the first end thereof and the first retainer and supporting the floor bridge panel for movement relative to first retainer in the direction of the second axis, second elongated linear slide bearing means interposed between the floor bridge panel adjacent the second end thereof and the second retainer for supporting the floor bridge panel for movement relative to the second retainer in the direction of the first axis, each of the first and second bearing means including an elongated generally U-shaped bearing receiver having spaced apart leg portions forming a guideway and oriented with the guideway facing generally vertically and including an elongated bearing received in the guideway of the bearing receiver, a cover plate frame adapted to be affixed to the second floor portion and having side members closely adjacent the sides of the floor bridge panel and an end member spaced apart from the second end of the floor bridge panel so as to permit movement of the floor bridge panel relative to the cover plate frame in the direction of the first axis, a first cover plate supported by a portion of the floor bridge panel adjacent the first end thereof, a second cover plate supported by the cover plate frame and by a portion of the floor bridge panel adjacent the second end thereof, the first and second cover plates having surfaces substantially flush with each other and adjacent edges spaced apart from each other so as to be adapted to permit normal movements of the floor portions due to thermal expansion and contraction, and means for coupling the second cover plate to the cover plate frame for preventing horizontal movements of the second cover plate relative to the cover plate frame while permitting a portion of the second cover plate to lift from supported relation on the floor bridge panel and move over a portion of the first cover plate in an earthquake.
Specification