The present invention relates to a sleeve for connecting a steel bar, wherein a body prevents generation of tolerance at the circumferential surface of at least one of an upper steel bar and a lower steel bar through a tolerance generation preventing unit, the body allowing the upper steel bar to be inserted from one side thereof in an axial direction and the lower steel bar to be inserted from the other side thereof in the axial direction.

A construction module for a structure, comprising: a formwork member that includes a base, a pair of parallel side walls that extend upwardly from the base, and a pair of parallel end walls. The base, the side walls and the end walls define a cavity for reinforcement and concrete. A reinforcement member includes an upper portion and a lower portion. When the reinforcement member is located in the cavity and concrete fills the cavity, the lower portion of the reinforcement member and the concrete define an elongate beam.

The present invention relates to a press-fit nut for an assembly, a press-fit nut-bolt assembly, and a method of constructing a steel-concrete composite structure using same, wherein a process is simple and a base material does not become deformed during an installation process. The press-fit nut-bolt assembly of the present invention includes a press-fit nut, a stud bolt, a counter nut, and a washer. The press-fit nut includes: a head part formed in a typical nut shape; and a press-fitting part that is formed extending from one of the two surfaces of the head part so as to have an outer diameter less than that of the head part, and that is inserted, through press-fitting, into a base material (M) that is an object requiring fastening. A hollow having threads is continuously formed in the head part and the press-fitting part. The stud bolt includes a body part that is coupled to the press-fit nut by passing therethrough, and a pin tail which is formed extending from an end of the body part and to which a mechanism for rotating the body part is coupled. The body part includes a first threaded portion and a second threaded portion which are formed on the outer surface of the body part along the lengthwise direction of the body part and spaced apart from each other.

Disclosed are a laminated beam slab and a preparation method thereof, belonging to the technical field of building structures. The laminated beam slab includes an intermediate layer, where the intermediate layer has protective layers arranged on both upper and lower sides, and the intermediate layer and the protective layers are provided with reinforcing cages inside; partition plates are arranged between the intermediate layer and an upper protective layer as well as a lower protective layer, the intermediate layer forms a mutually occluding mortise-and-tenon shape with a side opposite to the protective layers; the reinforcing cages have prestressing tendons and stirrups arranged penetrating through the partition plates in the intermediate layer and the protective layers; the preparation method includes steps of: prefabricating partition plates; binding reinforcing cages; installing formworks; fixing the reinforcing cages; and casting an intermediate layer and protective layers.

The disclosure presents a composite column formwork which utilizes a fiber reinforced polymer (FRP) stay in place container which incorporates horizontally coplanar support chairs bonded to the interior surface, closed ties bonded to the support chairs and a plurality of longitudinal rebar enforcements bonded to the closed ties. All of the components in a preferred embodiment are formed of a fiberglass material.

Stay-in-place forms and methods and equipment for installing thereof. A concrete form includes a vertical component and a horizontal component, the vertical component located substantially perpendicular to the horizontal component. Also, the form includes an interior surface, at least a portion of the interior surface providing a form for supporting uncured concrete; wherein the uncured concrete forms a concrete structural portion upon curing of the uncured concrete; and wherein the interior surface remains attached to the concrete structural portion after curing. The form may include inserts and compatible form attachments. Also, forms including recesses may be utilized to reduce the weight thereof. Lifting equipment and accessories may be utilized to lift the form from a form holder and set same in place. Forms contain the work area as soon as it is installed to minimize fall hazards and the time, costs, and downtime associated with installation of safety measures.

A combined structure of a column includes a plurality of main steel bars, a consecutive stirrup, and a plurality of tie bars. The plural main steel bars are arrayed to form an inner confined region and an outer confined region surrounding the inner confined region. Further, the consecutive stirrup proceeds with a consecutive turning and surrounding along the inner confined region and the outer confined region, and surrounds a region in the consecutive stirrup of the inner confined region so as to form a column core. As such, a complete confinement can be provided for the main steel bars, so as to effectively prevent the main steel bars from buckling, such that the performance of seismic resistance for the columns can be enhanced.

The disclosure presents a reconfigurable composite floor formwork which defined by a plurality of interlocking fiberglass panels formed into profiles which may be moved and adapted to provide a concrete form for a floor or ceiling. All of the components in a preferred embodiment are formed of a fiberglass material.

Various embodiments of the present disclosure provide a cast-in-place concrete slab load transfer apparatus and method of manufacturing same. In various embodiments, the concrete slab load transfer apparatus includes a plurality of load transfer dowels each having a top surface and a bottom surface, a basket supporting the load transfer dowels, and a plurality of welds including a plurality of breakable welds connecting the bottom surfaces of the load transfer dowels to the basket.

A concrete construction element has a concrete base body with at least one flat side and an end face. An anchor rail is embedded in the concrete base body. A reinforcement component is provided that has a plate embedded in the concrete base body at a side of the anchor rail which is facing toward the end face of the concrete base body. The reinforcement component has two anchors fixedly connected to the plate, wherein the two anchors extend away from the plate to a side of the anchor rail which is facing away from the plate. The two anchors each have an end facing away from the plate, wherein the end has an anchoring section, wherein the anchoring section forms an undercut in a direction toward the plate.