The present invention relates to a prefabricated deck unit for a building system, the deck unit including: a reinforcing framework encased in a composite material, the reinforcing framework comprising: a first metal mesh unit, a plurality of interspaced spheroidal void formers attached to or in intimate contact with the first mesh unit, and a second mesh unit resting upon, or attached to, the spheroidal void formers, wherein the framework defines at least one terminal channel on at least one end of the deck unit, the terminal channel being shaped and dimensioned to snugly receive an elongate connecting rod for connecting the deck unit to a further structural element of the building system.

A device (150) for splicing together a first reinforcement cage (10) and a second reinforcement cage (20), the first reinforcement cage (10) comprising a suspension band (18) adjacent one of its ends and the second reinforcement cage (20) carrying the said device (150) adjacent one of its ends, wherein the device (150) comprises: an anchoring portion (160) carried on a portion of the second reinforcement cage (20) adjacent its one end, e.g. via a bridging portion (170), and configured or configurable such that at least a portion thereof is radially spaced from the second reinforcement cage (20) so as to define a radial suspension gap (G) between the said portion and the second reinforcement cage (20), the suspension gap (G) being configured for receiving therein the suspension band (18) on the first reinforcement cage (10) as the first and second reinforcement cages (10, 20) are spliced together; and gate means (180) constructed and arranged so as to be selectively configurable in either an open configuration, in which the suspension band (18) on the first reinforcement cage (10) can be inserted into or received in the suspension gap (G) via the gate means (180), or a closed configuration in which the suspension band (18) on the first reinforcement cage (10), once located in the suspension gap (G), is prevented from being removed therefrom via the gate means (180), wherein the gate means (180) is moveable between its open and closed configurations by virtue of at least a portion thereof being moveable by pivoting.

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 buckling resistant spring clad bar (BRSCB) to improve lateral confinement of compression system uniformly so as to enable it to (a). applied loads withstand both compression and tension (b). ability to withstand much higher axial compression loads (c). significant improvement in post-elastic behavior due to enhanced ductility without strength degradation. The BRSCB comprises a plurality of bar, a plurality of one-way spring in an embodiment, a plurality of grips, and a plurality of peripheral ties. The system further comprises a plurality of opposing spring in another embodiment. In the opposing spring, one of the springs is wrapped in a clockwise direction and another one in an anticlockwise direction. Both the ends of the bar are covered with the end grip to hold the assembly firmly and to avoid end slippage of the one-way/opposing spring. The multiple bars wrapped with the spring are connected together with the peripheral ties to form desired cage assembly. The cage assembly can be embedded in the concrete structure/suitable medium. Further, spring cladded bars can be housed in sleeve to improve the ductility and impact/shock resistance of the structure.

Embodiments of the present invention relate to a prefabricated structural beam unit for a building structure. The beam unit includes a planar sole, two laterally spaced, elongate sidewall sections, and two longitudinally spaced endwall sections. The sole, sidewall sections and endwall sections combine to define a cuboid cavity at least partially filled with a composite material, wherein at least one endwall section includes one or more structural engagement connectors dimensioned to engage with, or interlock, under gravity assistance with one or more complementary structural engagement connectors forming part of a further prefabricated building unit of the building structure. Other embodiments relate to a prefabricated structural column unit.

A stirrup module includes an outer stirrup set, an upper-opening stirrup set having an upper opening and provided in an opening of the outer stirrup of the outer stirrup set, and a lower-opening stirrup set having a lower opening and provided in the opening of the outer stirrup of the outer stirrup set. Wherein the upper opening and the opening of the outer stirrup are oriented in the same direction, the lower opening and the upper opening are in opposite directions to each other. Wherein the upper-opening stirrup set has a first bottom of stirrup opposite to the upper opening, and the first bottom of stirrup corresponds to the position of the lower opening; the lower-opening stirrup set has a second bottom rib opposite to the lower opening, and the second bottom rib corresponds to the position of the upper opening.

A rebar cage includes a rebar guide, a rebar rod, and a rebar cage connector. The rebar cage connector includes front and rear sides, a base portion having top and bottom ends, upper and lower tabs extending at angles from the top and bottom ends of the base portion, and a hook portion. The upper and lower tabs respectively include upper and lower tab openings extending through the upper and lower tabs and through the top and bottom ends of the base portion. The hook portion extends from a first end at the base portion at the rear side and curls up towards the upper tab at a second end. The upper tab opening and the lower tab opening receive the rebar rod on the front side of the rebar cage connector. The hook portion receives the rebar guide on the rear side of the rebar cage connector.

A method of manufacturing a waffle slab includes providing a bottom mold separately on columns and exposing joint heads of the columns from the bottom mold; providing first sets of beam bars separately on the bottom mold to be parallel along a first direction; and providing second sets of beam bars separately on the bottom mold to be parallel along a second direction, wherein the second sets b of beam bars are configured to intersect with the first sets of beam bars without interference and together they form accommodation spaces for waffle molds.

There is provided a formwork assembly. The formwork assembly includes a plurality of longitudinally-extending and laterally spaced-apart steel reinforcing bars. The formwork assembly includes a hoop reinforcement shaped to extend about the reinforcing bars. The hoop reinforcement is configured to provide shear strength to concrete poured into the formwork so positioned. The formwork assembly includes a plurality of receptacles circumferentially spaced-apart about, coupled to and radially inwardly-extending from the hoop reinforcement so as to promote a desired positioning or spacing of the reinforcing bars. The formwork assembly includes a plurality of spacers circumferentially spaced-apart about, coupled to and radially outwardly-extending from the hoop reinforcement. The formwork assembly includes a formwork shaped to extend about and be positioned in place via the plurality of spacers. There is further provided a concrete stirrup apparatus comprising said hoop reinforcement, receptacles and spacers.

A reinforcement element for a diaphragm wall is described. The reinforcement element includes a reinforcement cage, the reinforcement element further includes a seal-carrier provided with a mounting part for receiving at least one seal, which is elongated, the seal-carrier is fixed to the first end part of the reinforcement cage and extends along the longitudinal direction of the reinforcement cage, the seal-carrier defines a housing for receiving the seal, at least a first part of which is surrounded by a sacrificial material. Additionally, a method for making a diaphragm wall in the ground is described that comprises placing the reinforcement element in a first trench, pouring concrete into the first trench, and discharging the sacrificial material out of the housing using a scraping tool.