Abstract: A stackable rebar chair includes a one-piece body of molded plastic that includes four vertical support legs and four vertical leg receiving sockets. The one-piece body also includes first and second concave rebar cradles that are oriented perpendicular to each other. Each of the support legs has a cross section that defines a first polygon, and each of the leg receiving sockets defines a partial second polygon that is both larger, and differently shaped, that the first polygon. When the rebar chairs are stacked, the four supporting legs of the upper chair are received in the leg receiving sockets of the lower chair in such a manner that a plurality of vertices of the first polygon are positioned, shaped and oriented to simultaneously match respective vertices of the partial second polygon.

Abstract: A method for producing a three-dimensional construction material component preferably having at least one curved surface. A plurality of spacers are arranged in a formwork. A textile reinforcement is supported on the spacers, such that the textile reinforcement has a defined position within a formwork interior of the formwork. A tensile force is applied via a tensioning device to the textile reinforcement in at least one tension direction. Construction material is introduced into the formwork interior and surrounds the textile reinforcement. The construction material is then hardened, wherein the tensile force is maintained during the hardening. During this process, the spacers are integrated into the construction material component. The tensioning device has at least one clamping unit for clamping an end portion of the textile reinforcement between two clamping surfaces. The clamping surfaces are provided on clamping insert bodies, which are of a plastic material of a defined hardness.

Abstract: A system for providing reinforcement to structures comprises a prefabricated rebar assembly, a first end plate and a second end plate. The prefabricated rebar assembly comprises multiple rods connected to each other. The prefabricated rebar assembly is held between the first end plate and the second end plate to form a block of rebar assembly.

Abstract: A concrete spacer for use in supporting wire mesh for pouring concrete within a mold. The spacer includes a base portion and an arm portion to offer stability. The base portion is trapezoid shaped and includes a clip for attachment to the wire mesh. The arm portion offers stability and extends opposite the base portion for attachment to the wire mesh.

Abstract: The present disclosure relates to a slab bolster upper for supporting rebars in a reinforced concrete structure. The slab bolster upper comprises an elongated base defining a lower surface, an upper surface for supporting the rebars, a first edge and a second edge opposite the first edge, voids formed through the elongated base to facilitate free flow of concrete therethrough and around the elongated base, a first connexion integrally formed about the first edge of the elongated base and a second connexion integrally formed about the second edge of the elongated base. The first and second connexions are configured to securely engage with corresponding first and second connexions of adjacent slab bolster uppers for interconnecting a plurality of slab bolster uppers together.

Abstract: A rebar support system used in the reinforcement of concrete structures is disclosed, comprising a rebar support tower and a rebar support base, individually capable of holding rebar members at a predefined height within a range of possible heights, the two further capable of acting together in tower-base duplex fashion in the formation of multilevel rebar grids. The rebar tower has four legs between which there are defined two intersecting passages, the legs being open-ended at the bottom and forming bidirectional arches at the top of said intersecting passages, said rebar tower further having a saddle formation at its apex. The rebar tower provides a tapered and angled foot profile at the bottom of each leg to minimize the area of contact when used with a concrete form, thereby reducing rebar support footprints after form removal.

Abstract: A pre-fabricated reinforcement cage is constructed of at least two cage frames spaced apart from each other. The cage frames include preferably axially extending steel plates and axially extending sleeves preferably having an internal threading pattern that is complimentary to the external threading pattern of a plurality of longitudinal reinforcing bars. The cage frames are optionally also provided with lifting bar guide collars to receive a lifting apparatus comprised of one or more lifting bars. The cage frame plates, sleeves and lifting bar guide collars are fastened together. The longitudinal reinforcing bars, having continuous, external thread-like deformations along their length are installed into the internally threaded sleeves or into threads of locking nuts holding the bars within optional smooth sleeves during the fabrication.

Abstract: Disclosed is a method of enhancing fire resistance of high-strength concrete by mixing a spalling reducer (fiber cocktail) into the concrete to control spalling and performing shear reinforcement of main steel bars using shear stiffeners based on a wire rope and spacers.

Abstract: The technical features of the present invention are for a method for quickly and easily constructing a building made of soil such as a house or a retaining wall by means of a process of installing a temporary mold in a frame member made of a mesh, compacting pugging clay into the temporary mold in a bottom-up method by a mechanical extruder, and immediately removing the temporary mold and drying the pugging clay.

Abstract: Multifunction device for positioning reinforcing materials within poured concrete comprising: an octagon-shaped base, with alternative alignment guides, for supporting the device on a supporting surface, an I-beam, or alternatively back-to-back E-beam, construction post with struts extending to the base, and a multifunction clip comprised of a saddle having a plurality of uprights extending therefrom and defining orthogonally-oriented sockets of differing dimensions adapted for clipping onto and positioning reinforcing materials a pre determined distance above the supporting surface.

Abstract: A sleeve device for transferring bending moments induced in a reinforced concrete slab includes a generally hollow member and tension rebars. The hollow member is positioned and fastened on a bottom formwork defining the reinforced concrete slab. The tension rebars are connected to opposing sides of an upper portion of the hollow member either directly or using rebar connectors. The hollow member creates a void in the reinforced concrete slab by pouring of concrete around an outer wall of the hollow member. The hollow member transfers compressive stresses across a bottom of the hollow member and tensile stresses through the tension rebars and the upper portion of the hollow member. The affixed tension rebars are spliced with regular reinforced concrete slab rebars to develop tensile stresses that are transferred through the relatively stiffer hollow member to retain a slab moment capacity.

Abstract: A support chair for bracing objects, such as rebar, cable, or the like. The support chair is preferably configured to support rebar at any one of multiple different heights.

Abstract: An anchoring assembly for anchoring a liner of a cured lining material applied in liquid form to metal objects, comprising a fixing device welded or soldered to a metal object, the fixing device comprising a weld element and a fixing element provided with a through hole, and an anchoring element configured to be passed through the through hole of the fixing device, wherein the weld element comprises a weld or solder stud.

Abstract: A support member for supporting a reinforcement material in a composite structure comprises a base member and first and second vertical leg members on opposing sides of the base member. The first and second vertical leg members have a first height relative to the base member. The first and second vertical leg members each have an opening configured to receive at least one strand of the at least one layer of reinforcement material. Third and fourth vertical leg members are on opposing sides of the base member and have a second height relative to the base member different from the first height of the first and second vertical leg members. The third and fourth vertical leg members each have an opening configured to receive at least one strand of the at least one layer of reinforcement material.

Abstract: A reinforcement support is provided for use in connection with concrete reinforcement elements and poured concrete. The reinforcement support includes a tubular paperboard shell having first and second ends with a channel extending therebetween. At least a first notch is formed into the first end extending towards the second end with the first notch being configured to supportingly accommodate at least one concrete reinforcement element.

Abstract: A support member for supporting a reinforcement material in a composite structure comprises a base member and first and second vertical leg members on opposing sides of the base member. The first and second vertical leg members have a first height relative to the base member. The first and second vertical leg members each have an opening configured to receive at least one strand of the at least one layer of reinforcement material. Third and fourth vertical leg members are on opposing sides of the base member and have a second height relative to the base member different from the first height of the first and second vertical leg members. The third and fourth vertical leg members each have an opening configured to receive at least one strand of the at least one layer of reinforcement material.

Abstract: An anchor bolt locator is provided that is inexpensively manufactured on automatic die-press machines from sheet steel and a structural nut that does not require any welding, while also being easy to use and install with current, commonly-used building practices and anchor designs. The anchor bolt locator is made from a galvanized sheet metal chair and a structural nut attached to the chair by way of a friction fit.

Abstract: A chair for supporting a rebar grid formed from intersecting lower and upper rebar members at a predetermined height above a bearing surface is constructed having a base member, a support structure having three or more equally spaced apart legs affixed to the base member, and a retention member constructed whose walls have four equally spaced apart slots extending downward from the walls upper edges, a first and second opposing pairs of the slots each having an upper receiving section formed by inwardly sloped wall edges to form a gap less than the diameter of the rebar members and having a retention section formed below the gap of sufficient size to permit one of the rebar members to extend through the retention section, wherein the retention section of the second opposing pair is formed below the retention section of the first opposing pair.

Abstract: A chair for supporting and spacing post-tension cables having a generally tapered body with an upper receiving area for securing the cables and a planar base adapted to rest on a flat support surface. The body has inner and outer surfaces that are substantially complementary to one another to allow a plurality of chairs to be stacked together. The receiving area includes posts extending upwardly between notches. The posts define passageways for guiding the cables into the notches. Detents project inwardly from the tops of the posts and fixedly retain the bars within the passageways. The chair may be formed from a resilient polymeric material.

Abstract: A spacer for positioning and locking spaced reinforcing cages into a combined integral unit for reinforcing large concrete structures is disclosed that is readily snapped into place even with narrow lattice cages.

Abstract: A support frame system for placing and securing reinforcing bars, which includes an elongated beam member which includes a plurality of saddles at a predetermined spacing. Support legs extending from the beam member hold the beam member, and thus also the re-bars, at a fixed distance above the mold. Once re-bars have been laid in the desired saddles, mating clips can be placed around each re-bar and locked onto the beam member to prevent movement of the re-bars during a subsequent concrete pour. Two or more of these beam members can be connected together end-to-end using mating prongs and holes at opposite ends of each beam member.

Abstract: A rebar support for use in forming concrete structures, includes a body formed from a single piece of an elongated metal substrate bent to define a first foot, a second foot positioned in spaced relation to the first foot, and a spanning segment that is vertically elevated, spans between the first foot and the second foot and has at least one rebar receptacle.

Abstract: A rebar positioner configured for being placed in a diagonal orientation within a cell of a masonry block including first and second end sections oriented in a first plane, a center S-shaped section in a second plane parallel to the first, laterally offset linear sections oriented in the second plane, and first and second vertical sections interconnecting the first and second end sections with the first and second linear sections, wherein the second end section terminates in a telltale extending away from the center section.

Abstract: A system of attaching and aligning both parallel and transverse bars for supporting a concrete matrix includes a plurality of substantially identical molded plastic clips for alternatively attaching and holding two parallel reinforcing bars of equal diameter or two transverse reinforcing bars of equal diameter.

Abstract: A chair and system for securing, supporting, and connecting cable, having troughs supported on support members for receiving cables. The troughs can each have locks for closing the troughs and securing the cables in place.

Abstract: A polymeric chair having a rebar cradle and legs of a T-shaped or U-shaped cross-section diverging downwardly from the cradle. The outer surface portions of the legs define segments of a cone. Inwardly extending web portions reinforce the legs. Feet at the distal ends of the legs are disposed to the inside of the outer surface portions. A flat sand plate for the chair has radially extending slots formed therethrough which are proportioned for snug engagement with side surfaces of the feet. The slots are elongate to accommodate different sized chairs having feet spaced at varying radial dimensions. The web portions taper to optimize their reinforcing function and conserve material. In one embodiment, a ring is formed integrally with the legs intermediate the table and the distal ends of the legs. The chair is of a unitary construction and may have an integrally formed strap for extension over the cradle to secure a rebar in place.

Abstract: A mesh spacer has vertical members extending outward with an X-shaped cross-section and horizontal dimensions that allow insertion of the spacer into an opening in a lower layer of reinforcing mesh in a first orientation. Notches in the lateral edges of the vertical members engage the reinforcing strands of the lower layer of mesh in a second rotational orientation of the spacer. An upper layer of mesh can be placed on the top surfaces of the vertical members and secured with ties that pass through openings in the vertical members.

Abstract: A support structure for retaining a reinforcing bar (“rebar”). Such a structure includes a rebar engaging portion, where the rebar engaging portion includes a receptacle. The receptacle includes a channel sized to receive the rebar, where the channel includes a first portion and a bar retaining portion defined by sidewalls that extend radially outward from a first end to a second end. The retaining features are disposed on the walls of the channel, where the sidewalls are configured to spread so that the rebar passes the retaining features and rests in the bar retaining portion as the rebar moves down the channel. Additionally, the support structure includes a support portion supporting the rebar engaging portion, where the support portion includes a plurality of legs which project outward from a central axis. In addition, the support structure includes a base configured to distribute weight of the support structure.

Abstract: A chair for supporting one or more bars. The chair can include a base, a lateral cross member and legs to support the lateral cross-member a distance away from the base. The lateral cross member can include one or more receptacles to receive the bar. Each receptacle can have a set of sidewalls defining an opening to a side of the lateral cross member (e.g., the top side). The lateral cross-member can be configured to allow the sidewalls to spread apart laterally so that the opening can widen to receive a bar. The lateral-cross member can be formed of a resilient material so that the opening closes to have a width less than that of the bar when the bar is in a bar retaining area. The lateral cross-member can include multiple bar receptacles to retain parallel bars. The bar receptacles can act as snap-fits.

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: An apparatus (“chair”) for supporting one or more reinforcement bars or post-tension cables (“bars/cables”) in a concrete structure includes a base member having a centered opening, a pair of opposing first leg members extending upward from the base member at a first angle, a pair of opposing second leg members extending upward from the base member at a second angle, and a strap-shaped locking cradle. The strap-shaped locking cradle includes an arc-shaped receiving portion attached to the first and second leg members, a flexible portion suitable for wrapping over the bars/cables and a fastener to affix the flexible portion to the arc-shaped receiving portion or one of the first leg members such that transverse and vertical movement of the bars/cables is limited and longitudinal movement of the bars/cables is allowed.

Abstract: This invention is related to a device to separate or out a distance apart structural metallic elements for concrete, between them or in relation to a surface on which concrete is going to be poured, in order to obtain coatings or layers of concrete with specified widths. The chair proposed it is made preferably of propylene and it is made by two vertical walls opposite each other and joined by a third wall orthogonal to the first two (load axis); the vertical opposite walls show on its upper end a semi-circular cavity to support an structural metallic element to be supported, and in its lower part, each one of the walls is divided in three legs, being defined the two on the ends by the vertical edges and a cavity preferably in form of arch between them, and the third being a projection of the transversal wall. All the walls show hollow arches in their lower ends and in some embodiments, preferably for pieces with heights above 2.

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 device to be placed in floating floor slabs and the installation system thereof, the device comprising a cube having a pair of tubes on each side thereof, parallel with the base, with facing sides in identical position; within said sides a section designed for placing rods on which the different layers of the rebar mesh are supported and a system for fitting the mesh on the rods, and also the securing of the corners of the different levels of the rebar mesh by means of linking of the cubes using the rods.

Abstract: In a first aspect, a plurality of slab bolster elements, each including a bolster frame member having a male connector disposed on a first end and a female connector disposed on an opposite end, with the male connector including first and second outer prongs for engaging a complementary female connector and the female connector including first and second opposing side walls with first and second transverse slats extending between the side walls so as to form a socket, the male connector further including a flexible prong extending inwardly between the outer prongs, with the flexible prong including a free inward end and a wedge element configured to resiliently contact and lockingly engage the first transverse slat of another of the plurality of slab bolster elements. In a second aspect, a continuous slab bolster assembly.

Abstract: Disclosed herein is an elongated C-shaped backing stud having a plurality of receiving notches positioned along its outer flanges. The backing stud is fastened to the studs of a sheet metal wall assembly by means of a plurality of fasteners, and such that the plurality of studs of the wall assembly abuts a planar web portion of the backing stud. The backing stud may be characterized in that (i) the ratio of the width of the web portion to the width of the backing stud flanges ranges from about 8 to 16, (ii) the ratio of the width of the backing stud flanges to width of the outer returns is at least about one, and (iii) the ratio of the width of the plurality of studs to the width of the outer returns ranges from about 6 to 8. The backing stud is configured to support wall hung grab bars, hand rails, cabinets, shelves, and the like.

Abstract: Composite structural system for floors or roofs comprising steel beams and reinforced concrete slab or shear walls comprising steel columns and reinforced concrete diaphragms. In both cases a steel plate with holes crossed with rebars is welded to the steel beam or to the steel column which performs the integral combination of the concrete, the structural element and the rebars.

Abstract: A polymeric chair having a rebar cradle and legs of a T-shaped or U-shaped cross-section diverging downwardly from the cradle. The outer surface portions of the legs define segments of a cone. Inwardly extending web portions reinforce the legs and provide feet at the distal ends of the legs disposed to the inside of the outer surface portions. A flat sand plate for the chair has radially extending slots formed therethrough which are proportioned for snug engagement with side surface of the feet. The slots are elongate to accommodate different sized chairs having fee spaced at varying radial dimensions. The web portions taper to optimize their reinforcing function and conserve material. In one embodiment, a ring is formed integrally with the legs intermediate the table and the distal ends of the legs. The chair is of a unitary construction and may have an integrally formed strap for extension over the cradle to secure a rebar in place.

Abstract: A multi-level chair for supporting a concrete reinforcement cable at a fixed height from the bottom of a concrete form is provided. The multi-level chair comprises a body having a plurality of receptacles at different heights. Each of the receptacles is adapted to retain a concrete post-tension reinforcement cable. In one embodiment, the body of the chair assumes an inverted V-shape including a pair of legs extending downwardly from an apex. Each of said legs has multiple receptacles to support a cable at a predetermined height from the bottom of the concrete form.

Abstract: An apparatus for supporting a reinforcing element during the pouring of concrete includes a body having both a reinforcing bar bearing indentation and a concrete mesh bearing notch.

Abstract: A concrete reinforcing bar support has a base, a support structure extending upwardly from the base and a 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 second clamping structure affixed to the support structure on an opposite side of the channel. Each of the first and second clamping structures includes a first C-shaped member and a second C-shaped member extending flexibly upwardly from the support structure and facing in opposite directions. A cap is slidably affixed over these C-shaped members and the channel.

Abstract: A polymeric chair having a rebar cradle and legs of a T-shaped cross-section diverging downwardly from the cradle. The outer surface portions of the legs are arcuate and define segments of a cone. Inwardly extending web portions reinforce the legs and provide feet at the distal ends of the legs disposed to the inside of the outer surface portions. A flat sand plate for the chair has radially extending slots formed therethrough which are proportioned for snug engagement with side surfaces of the feet. The slots are elongate to accommodate different sized chairs having feet spaced at varying radial dimensions. The web portions taper to optimize their reinforcing function and conserve material. In one embodiment, a ring is formed integrally with the legs intermediate the table and the distal ends of the legs. The chair is of a unitary construction and may have an integrally formed strap for extension over the cradle to secure a rebar in place.

Abstract: A structural element for constructing an auxiliary means for the manufacture of a reinforcement includes at least one coupling point for coupling the structural element to another structural element. The structural element is formed from a basic element. The structural element may further include a holding means for holding a reinforcement rod. A method for constructing an auxiliary means and a method for manufacturing a reinforcement are also provided.

Abstract: A bolster for use in construction has a beam, a first plurality of leg members on one side of the beam, a second plurality of leg members on an opposite side of the beam, and a plate having a first receptacle on one side and a second receptacle on the opposite side. The first receptacle receives a portion of the first plurality of leg members therein. The second receptacle receives a portion of the second plurality of leg members therein. The plate is integrally formed of an extruded polymeric material.

Abstract: The present invention relates to an apparatus for fixating and elevating elongated members; such as rebar, rods or reinforcing bars; used in the support and strengthening of poured hardening materials such as concrete, slurry, grey beam and asphalt. More particularly, the present invention is ideal for use in suspension of elongated members used for the strengthening of the above hardening materials to prevent the entry of rust into the hardening materials.

Abstract: A stackable rebar support chair having a support chair and a support plate detachable to each other. The support chair includes a base having multiple upstanding posts and downwardly extending legs designed to suspend the base above surface. The base can include multiple holes to permit the free flow of concrete around the support chair. Multiple centering supports can connect to and extend between each of the upstanding posts and an upper surface of the base to provide support to the posts and to permit gravity to assist positioning the supported rebar to a generally central position on the base. The base can include ribs extending from its lower surface to provide support to the base from the weight of the rebar. The support plate can include multiple generally upright pegs having recesses to receive the legs.

Abstract: A concrete reinforcing bar support has a base, a support structure extending upwardly from the base with a channel formed at 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. A first rebar extends through the channel. A second rebar is retained by the first and second clamping structures in a direction transverse to the first rebar. Each of the first and second clamping structures has generally C-shaped configuration.

Abstract: A bolster for use in construction has a beam, a first plurality of leg members on one side of the beam, a second plurality of leg members on an opposite side of the beam, a first plate having a receptacle on one side thereof and a second plate having a receptacle on one side thereof. The receptacle of the first plate receives a portion of the first plurality of leg members therein. The receptacle of the second plate receives a portion of the second plurality of leg members therein. The receptacles having a generally C-shaped cross section for resiliently contacting surfaces of the respective leg members. The plate is integrally formed of an extruded polymeric material.

Abstract: A chair has a receiving area and a plurality of separate legs extending downwardly from the receiving area. Each of the separate legs has a first portion extending in an angle outwardly from the receiving area and a second portion extending from an end of the first portion opposite the receiving area. The second portion extends vertically downwardly or inwardly from the end of the first portion. The first portion has a length substantially greater than a length of the second portion.

Abstract: A structure is described for supporting concrete reinforcement bars in a concrete structure, such as a footer or foundation. The structure includes a base member having a lower surface and an opposing upper surface. A plurality of pairs of opposing first leg members extend upward from the upper surface of the base member. Each of the first leg members have a lower end connected to the base member and an upper end distally disposed from the lower end. The structure includes a plurality of cradles for receiving the reinforcement bars, where each cradle is attached to the upper ends of a corresponding pair of the opposing first leg members. In a preferred embodiment, the structure includes horizontal support members disposed between and connecting the cradles. To retain the reinforcement bars within the cradles, preferred embodiments of the structure include retaining members that protrude inward from the inner surfaces of the opposing sidewalls.