Composite tilt-up panel
AssigneeMeadow Burke, LLC
InventorsDavid L. Kelly, Michael J. Recker
Life of this patent
Estimating the term…
Abstract
Composite precast concrete panels are described herein having have an anchor that distributes forces imposed on the anchor through concrete wythes of the panels. Specifically, pins can be embedded in at least one concrete wythe, and then the anchor is secured to the wythe as described herein. The anchor extends through another Wythe to selectively connect to a hoist system that moves and places the composite precast concrete panel. The forces imposed on the anchor are distributed through the pins and into multiple concrete wythes to prevent failure of the composite precast concrete panels and improve safety.
Claims18
A composite precast concrete panel, comprising:
- a first concrete wythe having an interior surface and an exterior surface;
- an insulation layer positioned against said interior surface of said first concrete wythe;
- a second concrete wythe with an interior surface and an exterior surface, said interior surface of said second concrete wythe positioned against said insulation layer;
- and
- a plate positioned between said second concrete wythe and said insulation layer, said plate having a slot with a slot width;
- and
- a pin extending through said plate, said insulation layer, and at least a portion of said first and second concrete wythes, wherein said pin has a pin width that is greater than said slot width, and said pin has a recess with a recess width that is smaller than said slot width, wherein said recess is at least partially positioned in said slot of said plate to secure said plate to said pin and distribute a force from said plate to said pin.
A method of forming a composite precast concrete panel, comprising:
- providing a form with outer edges that define a perimeter shape of said composite precast concrete panel;
- pouring concrete into said form that defines a first wythe;
- positioning an insulation layer on said first wythe;
- extending at least one pin through said insulation layer and into said first wythe, wherein said at least one pin has a pin width and an exposed end of said at least one pin has a recess with a recess width, wherein said recess width is smaller than said pin width;
- positioning a plate on said insulation layer such that said pin extends through an aperture of said plate, wherein said plate has a slot positioned adjacent to said aperture, and said slot and said aperture form a continuous opening, and wherein said pin width is larger than said slot width, and said recess width is smaller than said slot width;
- moving said plate so that said recess of said at least one pin is at least partially positioned in said slot to secure said plate to said at least one pin;
- and
- pouring concrete into a form that defines a second wythe on top of said plate and said insulation layer.
The method of claim 10, wherein said at least one pin comprises a second recess on a portion of said at least one pin that extends into said first wythe.
The method of claim 10, wherein at least one reinforcing structure is placed in said form that defines said first wythe prior to said pouring of said concrete into said form.
The method of claim 10, wherein said at least one pin is comprised of a material with a thermal conductivity less than a thermal conductivity of said first and second concrete wythes.
The method of claim 10, further comprising:
- positioning a void former around a lift anchor extending from said plate, wherein said void former defines a void in said second concrete wythe that provides access to said lift anchor.
An apparatus for selectively securing a plate to a pin, comprising:
- a plate having a substantially planar shape;
- an aperture extending through said plate, said aperture having an aperture width;
- a slot extending through said plate, said slot having a slot width that is smaller than said aperture width, wherein said slot and said aperture combine to form a continuous opening;
- a pin having a pin width that is greater than said slot width, wherein a recess in said pin defines a recess width that is smaller than said slot width;
- wherein, in a first position, said pin is adapted to pass through said aperture in said plate in a longitudinal direction;
- and
- wherein, in a second position, said pin is adapted to move into said slot in said plate in a lateral direction such that said recess of said pin is at least partially positioned in said slot of said plate to secure said plate to said pin and distribute a force from said plate to said pin.
Dependencies are inferred from the claim text.