Abstract: A bolster for use in construction has a beam, a pair of spaced apart foot members, a first plurality of leg members on one side of the beam, and a second plurality of leg members on an opposite side of the beam. The first plurality of leg members are connected at one end to the beam and at the opposite end to one of the pair of spaced apart foot members. The second plurality of leg members are connected at one end to the beam and at the opposite end to the other of the pair of spaced apart foot members. The beam, pair of spaced apart foot members and first and second pluralities of leg members are integrally formed together of a polymeric material. Multiple lengths of bolster may be joined together in a snap-fit engagement.

Abstract: A wedge for retaining a tendon in an anchor has first, second, third, and fourth portions. The portions each have a channel. The first portion has a constant thickness from a first end to a second end. The second portion has a first end adjacent to the second end of the first portion and tapers from the first end of the second portion to a second end thereof. The third portion has a first end adjacent to the second end of the second portion and tapers from the first end of the third portion to a second end thereof. The fourth portion has a first end adjacent to the second end of the third portion and tapers from the first end of the fourth portion to a second end thereof. The channels of each of the portions have ribs.

Abstract: A sheathing-retaining article for use with a post-tension anchorage system has a wedge with a tendon-retaining portion and a sheathing-retaining portion. The tendon-retaining portion has a channel extending longitudinally therealong. The channel is suitable for retaining the tendon therein. The tendon-retaining portion has a tapering outer surface with a wide end at one end of the wedge and a narrow end spaced therefrom. The sheathing-retaining portion extends outwardly from the narrow end of the tendon-retaining portion. The sheathing-retaining portion engages a sheathing of a tendon extending through the channel of the wedge.

Abstract: A chair has a receiving area and a plurality of legs extending downwardly from the receiving area. Each of the plurality of legs has a first portion extending at an angle outwardly from the receiving area and a second portion extending vertically from an end of the first position opposite the receiving area. The second portion extends vertically downwardly. A plurality of pin members are respectively formed at a bottom of the plurality legs. Each of the plurality of pin members extends downwardly from a bottom of second portion opposite the first portion so as to have a pointed end opposite the bottom of the second portion. The first portion has a length substantially longer than a length of the second portion.

Abstract: A method of forming a dead-end anchorage of a post-tension anchor system includes the steps of positioning a tendon within a cavity of an anchor body such that an unsheathed end of the tendon extends outwardly of the cavity such that a sheathed portion of the tendon is positioned within the cavity, mechanically inserting a fixing element into the cavity, mechanically inserting wedges into the cavity between the unsheathed end of the tendon and a wall of the cavity, and applying pressure onto an end of the tendon such that the fixing element engages the sheathed portion and such that the tendon and the wedges are in interference-fit relationship within the cavity. The fixing element includes a pair of fixing members positioned adjacent an end of the wedges.

Abstract: An apparatus for fixing the sheathing of an end of a tendon within an anchor body of a post-tension anchor system has an anchor body with a cavity formed therein, a tendon extending into the cavity, a fixing element engaged with the sheathing of the tendon for fixing a position of the sheathing on the tendon, and a pair of wedges in engagement with the unsheathed portion of tendon within the anchor body. The fixing element is positioned within the cavity. The fixing element can either be a wedge member interposed between the sheathing and the tendon so as to frictionally engage the tendon or a clip member engaged with the sheathing.

Abstract: An apparatus for fixing the sheathing of an end of a tendon within an anchor body of a post-tension anchor system has an anchor body having a cavity formed in an interior thereof, a tendon extending into the cavity and having a sheathing extending at least partially thereover and having a sheathed portion and an unsheathed portion, a pair of wedges engaged with the unsheathed portion of the tendon in the cavity of the anchor body, and a wedge member engaged with the sheathing of the sheathed portion. The wedge member is a unitary piece having a longitudinal split extending from an end of the piece to an opposite end of the piece. The wedge member substantially encircles an interior or an exterior of the sheathing of the sheathed portion of the tendon.

Abstract: A bar support apparatus has a first body with a first clamping structure and a second clamping structure extending from a top thereof, and a second body having a first clamping structure and a second clamping structure extending downwardly from a bottom thereof. The clamping structures of the second body engage the clamping structures of the first body. The second body also has a third clamping structure and a fourth clamping structure extending upwardly from a top thereof. A rebar is received within first and second clamping structures of the first and second bodies.

Abstract: An apparatus for preventing shrinkage of a sheathing of a tendon has an anchor body having a cavity formed in an interior thereof, a tendon extending into the cavity, a fixing element engaged with the sheathing for fixing a position of the sheathed portion on the tendon, and a pair of wedges in engagement with the unsheathed portion of tendon in the cavity of the anchor body. The fixing element is positioned away from the cavity of the anchor body. An encapsulation is formed over the anchor body so as to define a trumpet extending outwardly from one side of the anchor body. A clamp is engaged with the sheathed portion of the tendon within the trumpet.

Abstract: A device for fixing the sheathing of an end of a tendon within an anchor body of a post-tension anchor system has an anchor body having a cavity formed in an interior thereof, a tendon extending into the cavity having a sheathing extending at least partially thereover and having a sheathed portion and an unsheathed portion, a pair of wedges in engagement with the unsheathed portion of the tendon in the cavity of the anchor body, and at least one wedge member engaged with the sheathed portion. The wedge member has a wide end and a narrow end, the wide end being adjacent to the pair of wedges. The wedge member has a decreasing thickness from the wide end to the narrow end.

Abstract: An article for engaging a sheathing of a sheathed portion of a tendon has a tubular body having an inner surface and outer surface and a first end and a second end, fins extending radially outwardly from the outer surface, a longitudinal split extending through a wall of the tubular body and extending from the first end to the second end, locking ribs extending radially inwardly from the inner surface of the tubular body, and a collar formed adjacent the second end of said tubular body. Each of the locking ribs extends parallel to the other locking ribs. The locking ribs are equally spaced along the inner surface of the tubular body. Each of the fins extends parallel to the other fins. Each of the fins have a height increasing from the first end to the second end of the tubular body.

Abstract: A coupler apparatus for use with concrete segments has a first duct, a first coupler member connected to the first duct, a second duct, a second coupler member connected to the second duct, and a gasket member received in a channel of the connector of the first coupler member and extending outwardly therefrom. The gasket member is in compressive contact with an abutment surface of the second coupler member. The gasket member has a generally U-shaped cross-section with a curved end extending outwardly of an opening of the channel of the first coupler member. The abutment surface is a planar flanged surface extending radially transversely outwardly of the end of the second coupler member.

Abstract: A coupler apparatus for use with concrete segments has a first duct, a first coupler member having a connector and a flexible boot extending therefrom and having an end extending over a surface of said first duct, a second duct, a second coupler member having a connector and a flexible boot extending therefrom and extending over an exterior surface of the second duct, and a gasket received in the connectors of the first and second coupler members for forming a liquid-tight seal between the first and second ducts. Clamps are affixed over the ends of the flexible boot so as to establish a liquid-tight seal with the respective ducts. The connector includes an annular section affixed to an end of the flexible boot and an annular groove formed around this annular section.

Abstract: A tendon tensioning anchor has a base member having a tubular section extending therefrom, and a pair of flanges extending outwardly on opposite sides of the tubular section, and a polymeric encapsulation in generally air-tight juxtaposition with an exterior of the base member. A hole is formed through each of the pair of flanges. The polymeric encapsulation extends entirely through and fills the holes so as to integrally connect the polymeric material overlying one surface of the flange with the polymeric material overlying an opposite surface of the flange. The hole is formed adjacent to the tubular section.

Abstract: A concrete reinforcing bar support has a base, a support structure extending upwardly from the base and having a channel formed in an upper surface thereof, a first clamping structure affixed to the support structure on one side of the channel and a second clamping structure affixed to the support structure on an opposite side of the channel. The base is a generally planar surface. The channel has a length dimension that is less than a length dimension of the base. The support structure has first and second side panels extending vertically upwardly from the base to a bottom of the first and second clamping structures.

Abstract: A duct system for profiled post-tendon construction has a first duct, a second duct and a third duct joined together in end-to-end relationship. The first and third ducts are of one type of polymeric material. The second duct is of a different type of polymeric material. The second duct has a parabolic curvature while the first and third ducts are generally straight. The second duct has a cross-sectional configuration that is identical to the cross-sectional configuration of the first and third ducts.

Abstract: An article for engaging a sheathing of a sheathed portion of a tendon has a tubular body having an inner surface and outer surface and a first end and a second end, fins extending radially outwardly from the outer surface, a longitudinal split extending through a wall of the tubular body and extending from the first end to the second end, locking ribs extending radially inwardly from the inner surface of the tubular body, and a collar formed adjacent the second end of said tubular body. Each of the locking ribs extends parallel to the other locking ribs. The locking ribs are equally spaced along the inner surface of the tubular body. Each of the fins extends parallel to the other fins. Each of the fins have a height increasing from the first end to the second end of the tubular body.