Abstract: The invention provides a method for demounting a cable tensioned between a first and second anchorage points on a structure. The method comprises the following steps: slackening the cable so that a running part of the cable is freed from one of said first and second anchorage points; freeing said running part of the cable from the other said first and second anchorage points; supporting said running part of the cable; and removing said running part of the cable away from at least one of said first and second anchorage points.

Abstract: A wale for use in bracing a retaining wall. The wale is comprise of a back wall, a front wall having a channel formed therein, and a plurality connecting walls connecting the back and front walls to form at least one chamber between the back and front walls. In one embodiment, the wale is of unitary construction and the plurality of connecting walls includes top and bottom walls which form a single chamber between the back and front walls. In an alternative embodiment, the wale is of a unitary construction and the plurality of connecting walls includes atop, upper reinforcing, lower reinforcing, and bottom walls, which form a plurality of chambers between the back and front walls. The wale may by made of a pultruded composite material such as a fiberglass reinforced plastic (FRP) resin impregnated composite. A seawall system using such a waler is also described.

Abstract: Pre-stressed, strip-type tension members are applied to supporting structures, especially concrete supporting structures. To this end, a clamping device is used to pre-stress the tension member at least at one end, at a distance from the surface of the supporting structure, by a temporary clamping element which is fixed to the tension member, and the tension member is then pressed onto the surface by at least one permanent brace. The two temporary clamping elements are removed from the surface once the tension member has been pressed onto the surface.

Abstract: A device for connecting a beam to pillars or similar supporting structural elements in order to erect buildings, particularly multistory buildings, by means of prefabricated concrete components, the device comprising first means for connecting two end regions of the beam to the pillars and second means for connecting the beam to the pillars, the first connection means provide a coupling at least of the hinge type between each one of the two end regions of the beam and the corresponding pillar; the second connection means comprise at least one tension element that passes through the beam and is connected to the pillars by means of the ends thereof that protrude from the beam.

Abstract: An anchor for engagement with a post-tension tendon includes an anchor base having a generally tapered wedge receiving bore. A sheath surrounds the anchor base. The sheath has a substantially cylindrical extension on one side of the anchor base for contacting the tendon at a distal end thereof from the anchor base. The extension is formed integrally with the sheath and has a seal disposed therein proximate the distal end. A cap having external threads thereon is for engaging corresponding internal mating threads on the sheath on a side of the anchor base opposite to the sheath extension. The cap has a tool engagement surface thereon to facilitate rotation by a tool for engagement with the sheath.

Abstract: An insulated concrete panel having one or more tendons positioned in the insulation layer inside the panel which are put into tension after the concrete panel has been formed.

Abstract: The anchoring device, for anchoring at least two reinforcements for prestressing a civil engineering works structure, has a block through which there pass at least two pairs of anchoring orifices arranged symmetrically on each side of a mid-plane of the block. The two orifices of each pair have axes substantially parallel to the mid-plane and are directed toward two opposite sides of the block to take, respectively, two ends of a taut reinforcement surrounding the structure. The block has a bearing zone pressed against the structure in response to the tension in the reinforcements.

Abstract: A column to structure attachment device and method is disclosed for securing a support column between a base structure and a beam structural member. The device includes a structural column having a first end and a second end with a void parallel to a longitudinal axis of the column such that the void forms a communication therethrough between the first end and second end. Also included is a first end adapter element that engages the column first end and a second end adapter element that engages the column second end. In addition, an element is provided for maintaining compressive loading on the column between the first end adapter element and the second end second adapter element and is operational to maintain the compressive loading under all anticipated external loading conditions acting upon the column to structure attachment device through the base structure and the beam structural member.

Abstract: A pocket former includes an outer barrel having a first rim, a second rim and a frustoconical body portion extending from the first rim to the second rim. A center barrel is connected to the outer barrel and has a proximal lip adjacent the first rim of the outer barrel, a distal lip adjacent the second rim of the outer barrel, and a tubular body portion extending from the proximal lip to the distal lip, and extends beyond both the first rim and the second rim. An annular flange curves out and away from the second rim of the outer barrel. A spiral surface is located on the frustoconical body portion of the outer barrel. A nut surface is located on the tubular body portion of the center barrel adjacent the distal lip.

Abstract: Anchor 10 for reinforcing a structure against displacement forces and a method of installation includes drilling a borehole 50 in an anchor medium 110 adjacent the structure A length of roving 21 composed of filaments 24 is doubled and pushed into borehole 50 with free end 23 of roving 21 protruding. Backfill grout 41 or resin 42 is pumped or poured into bore hole 50 to embed roving 21 Filaments 24 of free end 23 are spread apart and attached to the structure by adhesive.

Abstract: An anchoring device for a corrosion-protected tension member includes an anchor body, which is provided with bores for the passage of the tension elements. Sealing discs, which can be compressed by means of a pressure plate and threaded bolts, are provided on a face of the anchor body and lie opposite a downstream face. A perforated disc, which is enclosed by two supporting discs, is located downstream of the sealing discs and the pressure plate. The perforated disc acts as a spacer for the tension elements and is fixed between lugs that are opposite an anchor tube and that is connected to the anchor body. The locking of the perforated disc enables the position of the tension elements to remain parallel, even when the sealing discs are compressed to activate the seal. If individual tension elements have to be replaced, the loosening of the threaded bolts allows the sealing discs to “breathe” and to return to their original position.

Abstract: A corrosion-resistant tension member, particularly a tendon for prestressed concrete, comprising a bundle of tension elements arranged inside a sheathing, has at its ends anchoring devices each with an anchor plate. On the side of the anchor plate facing away from the open air side, a seal having tension elements running through it and having a sealing plate are arranged, the sealing plate being fixed in place on the side facing away from the anchor plate opposite the anchor body against longitudinal displacement. Between the anchor plate and a pressure plate butting against the sealing plate, pressure-transferring means, for example, a pressure tube, are provided, having a length calculated in such a way that a longitudinal displacement of the anchor plate that occurs when the tension elements are being tensioned, actuates the exertion of surface pressure to the sealing plate for activating the seal.

Abstract: A fastener assembly 10, in respect to forces which are subsequently applied, after the installation thereof, when forces is applied in one direction, this fastener assembly 10 is self adjusting incrementally, as needed in travel or actuation; yet when a force is applied in the opposite direction, this fastener assembly 10 is not self adjusting and there is no travel or actuation.

Abstract: A reinforcing bar joint sleeve fixing device for fixing a reinforcing bar joint sleeve disposed in the interior of precast concrete to a molding form in fabricating a precast concrete structure with use of the molding form, which device permits both axial and radial positions of the reinforcing bar joint sleeve to be set positively and is employable repeatedly, the reinforcing bar joint sleeve fixing device comprises a cylindrical ring member disposed in the interior of a reinforcing bar joint sleeve, a plurality of slide pins fitted in an outer wall of the ring member so as to be slidable radially outwards, an elastic ring for pressing the plural slide pins radially inwards, a shaft formed of a head portion and a rod portion concentric with the head portion, the head portion being received in the interior of the ring member and having a conical shape which is larger in diameter toward axially the inside of the reinforcing bar joint sleeve, an insertion hole formed in the molding form for insertion therethrou

Abstract: A system for constructing log structures includes a corner connection structure, a through-bolt clamping apparatus, an opening support structure, a butt joint connection structure, a log profile, and an exterior casing structure. The corner connection structure has logs with overlap portions shaped so that the overlap portions of the logs of a first wall overlap and alternately interlace the overlap portions of the logs of a second wall. A generally vertical slot extends through the overlap portions of the logs, and at least one spline is provided in the slot. The through-bolt clamping apparatus has a through-bolt extending along the height of the wall, a lower clamp arm coupled to the through-bolt and the bottom of the intersecting walls, and an upper clamp arm coupled to the through bolt and the top of the intersecting walls.

Abstract: A tension member comprising a plurality of fiber filaments gathered into a plurality of strands. The filaments run close together, and a protective sheath is provided around the strands. Each strand is coated on the exterior thereof with a strand sheath of a material having a low friction coefficient, permitting the strands to move longitudinally in relation to one another and independently of each other.

Abstract: Pre-tension and post-tension processes for the manufacture of pre-stressed structures in which bonded carbon fiber cables are provided with burial anchors and temporary anchors outward of the burial anchors. The burial anchors are embedded in the structure. The temporary anchors enable stressing of the carbon fiber cables.

Abstract: The structural cable (2) to be anchored, such as a main suspension cable or a stay cable, is made of a compact bundle of parallel metallic wires. The cable wires are distributed into seven-wire units (18) in a portion of the cable adjacent to an anchor block (13), and these seven-wire units are individually anchored on the anchor block.

Abstract: An end termination for a tension leg of non-metallic materials like composite material is disclosed. The tension leg is constructed of a number of strands which constitute the load carrying elements of the tension leg. The strands are twisted (laid) about the longitudinal axis of the tension leg by a predetermined laying length and in turn each strand is constructed of a plurality of rods of composite material having embedded strength fibres. The rods are in turn twisted about each other like in a wire rope. The strands terminate into a receiving body that forms fixing points for the respective strands. The end termination comprises an embracing element that is spaced apart from the receiving body and keeps the strands together. Intermediate the embracing element and the receiving body the strands extend less radial restriction and in a substantially natural direction towards and into apertures in the receiving body.

Abstract: A column to structure attachment device and method is disclosed for securing a support column between a base structure and a beam structural member. The device includes a structural column having a first end and a second end with a void parallel to a longitudinal axis of the column such that the void forms a communication therethrough between the first end and second end. Also included is a first end adapter element that engages the column first end and a second end adapter element that engages the column second end. In addition, an element is provided for maintaining compressive loading on the column between the first end adapter element and the second end second adapter element and is operational to maintain the compressive loading under all anticipated external loading conditions acting upon the column to structure attachment device through the base structure and the beam structural member.

Abstract: An end cap locking mechanism used to protect attachment means connecting pre-cast concrete structural members from exposure to adverse environmental conditions having an end cap and a connection sleeve, wherein the end cap is inserted into an end of the connection sleeve and engaged therein prohibiting any exposure of the attachment means to precipitation, which if exposed to such, could possibly corrode the attachment means. The position of the end cap is locked when inserted into the end of the connection sleeve by protrusion rings and cooperating recesses within both the end cap and the receiving section of the connection sleeve.

Abstract: A wall includes a plurality of wall members stacked substantially vertically and including a bottom wall member and a top wall member. Each wall member has an upper surface in opposed relation to a lower surface and a through opening extending from the upper surface to the lower surface. A through opening in each wall member is aligned with a through opening in all other wall members so as to form a through opening in the wall extending from the upper surface of the top wall member to the lower surface of the bottom wall member. A rod, having an upper end in opposed relation to a lower end, is positioned in the through opening of the wall and a lower fastener attaches to the lower end of the rod adjacent the lower surface of the bottom wall member. An upper fastener attaches to the upper end of the rod adjacent the upper surface of the top wall member, and an actuator is positioned between the upper fastener and the upper surface of the top wall member for applying a downward force to the top wall member.

Abstract: The present invention relates generally to a wale for use in bracing a retaining wall. The wale is comprise of a back wall, a front wall having a channel formed therein, and a plurality of connecting walls connecting the back and front walls to form at least one chamber between the back and front walls. In one embodiment, the wale is of unitary construction and the plurality of connecting walls includes top and bottom walls which form a single chamber between the back and front walls. In an alternative embodiment, the wale is of a unitary construction and the plurality of connecting walls includes a top, upper reinforcing, lower reinforcing, and bottom walls, which form a plurality of chambers between the back and front walls. The wale may by made of a pultruded composite material such as a fiberglass reinforced plastic (FRP) resin impregnated composite. A seawall system using such a waler is also described.

Abstract: An apparatus and method for reducing corrosion in post-tension construction is described. An anchor base having an aperture with at two continuously opening surfaces is used with a post-tension tendon. A sheath surrounds the anchor and includes a cylindrical extension having a contact end distal from the anchor base for contacting the tendon as the tendon is inserted through the cylindrical extension and the anchor base aperture. The method positions an anchor base in a selected location so that a tendon end can be inserted into the anchor base to engaged the contact end distal from the anchor base. The tendon is threaded through the anchor base until a selected length extends through the base. The tendon is tensioned, a segment of the tendon sleeve is removed proximate to the anchor base, and a wedge is anchored between the tendon and the anchor base.

Abstract: A building construction is provided, including a plurality of connectors. Each of the connectors has an upper portion, a lower portion, a flange extending outwardly between the upper portion and the lower portion, and an axial bore extending through the connector from the upper portion to the lower portion. The upper portion and the lower portion define sloped bearing surfaces. The connectors are positioned between a plurality of building structural members. The upper and lower portions of the connectors extend into recesses in the structural members having sloped walls corresponding to the sloped bearing surfaces of the connectors. A tensioner extends through the bores of the connectors to connect the structural members. The bearing surfaces of at least two of the connectors have different slopes.

Abstract: A bonded monostrand post-tension system including an anchor having a tubular extension extending therefrom, a duct having an interior passageway formed therein, a coupler having a one end affixed to the tubular extension of the anchor and another end affixed to the duct, and a single tendon secured to the anchor and extending through the duct and the coupler. The coupler has a first internal thread at one end thereof and a second internal thread at an opposite end thereof. The internal threads are in interference-fit relationship with unthreaded surfaces of the duct and the tubular extension of the anchor.

Abstract: A system and method for securing the wall framing and roof of a building structure against wind. A cable tensioner, located between two uprights of the wall framing and below the top plate, is attached to an anchor secured in the foundation. A cable extends over the first roofing member, under the top plate, over a second roofing member, through the cable tensioner, and over a third roofing member. In another embodiment, a cable tensioner has a vertical sleeve, a hollow tube affixed to the vertical sleeve, a rod extending through the vertical sleeve, and a nut threaded onto the nut for tensioning the cable.

Abstract: A coupler apparatus for use with tendon-receiving duct in a segmental precast concrete structure including a coupler body having an interior passageway for receiving the duct therein. The coupler body has a generally U-shaped channel formed at one end thereof. The coupler element has a connector element formed on interior thereof adjacent one end of the coupler body so as to allow the coupler element to receive a variety of implements for the formation of the precast concrete segment.

Abstract: A post-tension anchor system including an anchor body having a polymeric encapsulation extending therearound in which the encapsulation has a tubular portion integrally formed therewith and extending outwardly from the anchor body. A tendon is affixed within a wedge-receiving cavity of the anchor body. The tendon has a sheathed portion and an unsheathed portion. A seal member is affixed to an end of the tubular portion opposite the anchor body. The seal member has a portion extending around the sheathed portion of the tendon in generally liquid-tight relationship therewith. The tubular portion has an interlock area extending therearound for engaging an interior surface of the seal member. The tubular portion has a length of generally greater than four inches extending outwardly of the anchor body. A plurality of wedges are positioned in interference-fit relationship with the unsheathed portion of the tendon within the wedge-receiving cavity of the anchor body.

Abstract: Connecting element for joining two support members (2, 3) absorbing tensile forces, which connecting element (1) comprises at least a first and a second casing body (5, 6) with a through-hole (7) for receiving the respective support members (2, 3), which casing bodies (5, 6) can be joined together by way of a joining section (9) at a first end (11) of each casing body (5, 6), the opposing second end (13) of each casing body (5, 6) being provided with locking members (15, 16) for holding the support members (2, 3) fast. In a working position the locking member (15, 16) of at least one casing body (5, 6) produces an axial locking of the support member (2, 3) running through the casing body (5, 6) by way of a stop part (20) created on the support member (2, 3) within the area of the second end (13) of the casing body (5, 6).

Abstract: The invention relates to a tie rod for a strip-type tension member (1), used in the building trade, and consisting especially of fibre-reinforced plastic lamellae. Said tie rod comprises at least one anchoring body (2) which is positively connected to the tension member (1) by means of adhesion and/or friction, and can be supported on a fixed abutment. The anchoring body (2) comprises a plurality of clamping blocks (3) which are arranged at a distance from each other in the longitudinal direction of the tension member and are connected to said tension member (1) by means of adhesion and/or friction. One of said clamping blocks is supported on the fixed abutment (7), and the clamping blocks are interconnected by extension sections (9) having different spring stiffnesses, the spring stiffnesses of said extension sections (9) increasing towards the end of the tension member (1).

Abstract: An apparatus and method for reducing corrosion in post-tension construction is described. An anchor base having an aperture with at two continuously opening surfaces is used with a post-tension tendon. A sheath surrounds the anchor and includes a cylindrical extension having a contact end distal from the anchor base for contacting the tendon as the tendon is inserted through the cylindrical extension and the anchor base aperture. The method positions an anchor base in a selected location so that a tendon end can be inserted into the anchor base to engaged the contact end distal from the anchor base. The tendon is threaded through the anchor base until a selected length extends through the base. The tendon is tensioned, a segment of the tendon sleeve is removed proximate to the anchor base, and a wedge is anchored between the tendon and the anchor base.

Abstract: An apparatus and method for reducing corrosion in post-tension construction is described. An anchor is engagable with a post-tension tendon and comprises an anchor base and sheath engaged with the anchor base, and a cap for sealing the portion of the tendon within the anchor. The sheath includes a cylindrical extension having a contact end distal from the anchor base for contacting the tendon as the tendon is inserted through the cylindrical extension and the anchor base aperture. The cap can include a detachable extension for supporting a pocketformer having an aperture therethrough.

Abstract: An apparatus and method for reducing corrosion in post-tension construction is described. An anchor is engagable with a post-tension tendon and comprises an anchor base and sheath engaged with the anchor base, and a cap for sealing the portion of the tendon within the anchor. The sheath can include an extension having a contact end distal from the anchor base for contacting the tendon as the tendon is inserted through the extension and the anchor base aperture. The cap can extend completely through the anchor base for connection to the anchor base of a sheath or sheath extension attached to the base. A pocketformer is attachable to the sheath for generating a void in concrete.

Abstract: A coupler member for use with precast concrete segmental structures having a first duct, a first coupler member extending over and around an exterior surface of the first duct and having a seat opening adjacent an end of the first duct, a second duct, a second coupler member extending over and around an exterior surface of the second duct and a seat opening adjacent to an end of the second duct, and gasket received in the seats of the first and second coupler members. An external seal is affixed to an opposite end of the first coupler member and affixed to an exterior surface of the first duct. The seats of the first and second coupler members have slots facing one another. The gasket is received within these slots. The gasket has a tapered outer surface suitable for liquid-tight abutment against an inner surface of one of the slots.

Abstract: A post-tension anchor system including a first tendon, a second tendon, a first anchor receiving the first tendon therein, a second anchor receiving the second tendon therein, a coupler extending over the first anchor and secured to the second anchor such that the first tendon extends through a hole in the coupler, and a cover extending over an exterior surface of the coupler so as to be engaged with the second anchor in liquid-tight relationship. The cover is an encapsulation formed in liquid-tight sealing relationship over an exterior surface of the coupler. The second anchor includes a barrel anchor and encapsulated anchor.

Abstract: An end termination (15) for a tension leg (10) of non-metallic materials like composite material is disclosed. The tension leg (10) is constructed of a number of strands (5,6) which constitute the load carrying elements of the tension leg (10). The strands (5,6) are twisted (laid) about the longitudinal axis of the tension leg by a predetermined laying length and in turn each strand (5,6) is constructed of a plurality of rods (7) of composite material having embedded strength fibres. The rods (7) are in turn twisted about each other like in a wire rope. The strands (5,6) terminate into a receiving body (16) that forms fixing points for the respective strands. The end termination (15) comprises an embracing element (17) that is spaced apart from the receiving body (16) and keeps the strands (5,6) together.

Abstract: A device having an anchor block having orifices therethrough, each accommodating a tendon of the cable and a means of immobilizing the tendon. The device further includes a bearing piece for the anchor block, and means of guiding the tendons between the anchor block and a running part of the cable. The guide means are connected to the bearing piece and include an individual guide passage for each tendon of the cable, allowing angular deviation thereof. Each guide passages have, in the direction of the anchor block, a transverse layout aligned with that of the orifices in the anchor block.

Abstract: An assembly for compressing a foundation piling prevents individual piling segments from sliding out of alignment. The assembly is an anchoring device that is lowered into a passageway running through a concrete or steel foundation piling to a desired depth. The anchoring device is suspended to a cable and has a center section and at least one moveable wing or wedge attached to the center section. Then a weight is dropped onto the anchoring device. The force of the impact causes the wings on the anchoring device to slide down and extend away from the center section. The force of the impact also forces the wings to grip the piling because the anchoring assembly is wider than the passageway when the wings slide down the center section. Tension is applied to the cable, which is now secured to the piling by the anchoring device. The tension in the cable creates a compressive state on the piling which prevents the individual segments from sliding out of alignment.

Abstract: A device for connecting a beam to pillars or similar supporting structural elements in order to erect buildings, particularly multistory buildings, by means of prefabricated concrete components, the device comprising first means for connecting two end regions of the beam to the pillars and second means for connecting the beam to the pillars, the first connection means provide a coupling at least of the hinge type between each one of the two end regions of the beam and the corresponding pillar; the second connection means comprise at least one tension element that passes through the beam and is connected to the pillars by means of the ends thereof that protrude from the beam.

Abstract: A roof anchor with a channel fits over a roof panel rib typically having a rib head supported by a narrower rib neck. Opposing bolts on each anchor side thread through matching threaded holes in anchor sides and into the channel, sandwiching a roof panel rib therebetween when it is received into the channel. Alternatively, bolts on a single anchor side may sandwich the roof panel rib between the bolts and the other anchor side. To prevent the anchor from lifting off the roof panel rib, the bolts are located on the anchor sides low in the anchor channel, sufficiently apart from the anchor top so that the roof panel rib head can be received between the bolts and the anchor top. A rib bar typically shaped to functionally match the roof panel rib may be inserted within the roof panel rib as a brace to prevent a roof panel rib from collapsing under force of the bolts. When the anchor bolts tighten against the roof panel rib, the panel rib sides are sandwiched between the rib bar and the bolts.

Abstract: A fastener assembly 10, in respect to forces which are subsequently applied, after the installation thereof, when forces is applied in one direction, this fastener assembly 10 is self adjusting incrementally, as needed in travel or actuation; yet when a force is applied in the opposite direction, this fastener assembly 10 is not self adjusting and there is no travel or actuation.

Abstract: An anchorage for a post-tension system including an anchor body having an interior cavity and a generally flat end surface, a tendon extending through the interior cavity of the anchor body, a plurality of wedges in interference-fit relationship between a wall of the interior cavity and a surface of the tendon, a cap member positioned outwardly of the flat end surface, and a ring juxtaposed against the inner surface of the cap member. The ring is physically deformed so as to provide a visual indication of a desired amount of tension applied to the tendon. The ring is received within an annular slot formed in the flat end surface of the anchor body.

Abstract: A take up device for a building structure, e.g. holdown for securing the building structure to a foundation, has a housing secured by fasteners to the building structure, the housing defining a cylindrical chamber containing a piston and fluid, with a piston rod projecting from the housing. The piston rod is connected to a foundation anchor, and a fluid passage interconnects portions of the cylindrical chamber at opposite sides of the piston. The fluid passage is provided with a one-way valve, which allows the housing to move upwardly relative to the piston, to maintain the tightness of the connection to the anchor bolt, but resists opposite movement of the housing.

Abstract: A joint made between prestressing strands with a prestressing strand coupler is covered with a transparent coupler sheath having a retarded-hardening resin filling material injection opening and discharge opening provided in a tube wall thereof, and a resin filling material is injected into the transparent coupler sheath from the injection opening to fill the coupler sheath with the filling material. Thereafter, the whole outer peripheral portion of the prestressing strand joint, including the coupler sheath, is embedded with placed concrete. Tension is applied to the prestressing strands after the concrete has hardened and before the resin filling material hardens, thereby completing an excellent prestressing strand joint structure. According to the present invention, the filling condition of the resin filling material in the coupler sheath around the prestressing strand joint can readily be confirmed by visual observation.

Abstract: A tie-down apparatus for building structures, including mobile homes. The structure is constructed with a plurality of structural members including channel members disposed therein. In one embodiment, channel members are formed in both the roof structural members and the sidewall structural members. A tie-down cable is disposed within the channels and the two terminal ends thereof releasably engaged with hooks. The hooks are further attached to ground anchors located within the ground adjacent structural sidewalls. A tensioning mechanism is disposed near one terminal and of each of the tie-down cables for simultaneously applying a tensioning force to the tie-down cables, that in turn directs a downward force on the roof structural members thereby retaining the roof in place during high wind conditions.

Abstract: A seismic restraint system, kit and method for restraining electrical equipment weighing up to 2000 pounds, or greater, in an earthquake. The kit allows for facile installation of the seismic restraint system at any site. Importantly, the system allows the electrical equipment to be reconfigured without redrilling of a concrete sub-floor which is used as an anchor point for the restraint system attached to the electrical equipment. The restraint system is particularly suitable for restraining large computer units in a seismic event.

Abstract: A foundation repair piling made up of segments is post tensioned by a cable fed into the segments after the piling is installed. A cable anchor serves as a base segment of multiple concrete piling segments. After installing all the concrete segments on top of the base segment, a cable is inserted into passages in the segments. The cable is threaded through the completely installed piling segments and into the cable anchor. After the cable bottoms out in the cable anchor, upward tension is applied to the cable. As the cable is pulled, cable lock members in the cable anchor increase gripping pressure even as the cable tension increases, thereby solidly anchoring the end of the cable in the cable anchor. After the desired tension is reached, the cable is terminated at the top of the last segment. The tension is held by a termination lug at the top end of the cable.

Abstract: In order to install or tension a brace (1) having a false bearing, for example a stay cable for a cable-stayed bridge, an external tensioning member or similar comprising a bundle of plastic-sheathed individual elements (2) made of steel, for example, wires, strands of wires or similar, the individual elements (2) are exposed in the area of the anchoring in order that they may be anchored at this point in holes (6) in an anchoring plate (7) which is supported by the building structure (9) by means of wedges (5). In order to ensure that when the strand is anchored the remaining plastic jacket (4) ends as close as possible to the anchoring plate (7), it is suggested that the plastic jacket be prevented from making any longitudinal movement during the extension of each individual element (2) which occurs during tensioning by a stop in the form of an annular shoulder (6d) which surrounds the element (2) in the anchoring area, and thereby compressed.

Abstract: The invention concerns fail-safe devices for use in reinforced concrete structures. The device (1) comprises a link (8) of high tensile strength material and first (2) and second (3) end regions. The end regions (2, 3) and the link (8) joining them are formed from a single piece of material. The link (8) is waisted such a portion thereof is of a reduced cross section. The device is designed to yield at a given loading to within close tolerances and enables the design and construction of buildings which will react in a safe way under earthquake conditions.