A construction method for a building is provided that includes the steps of: hoisting and positioning a plurality of precast columns on at least a portion of a predetermined area of a construction site to form a precast column array having at least two spans along a first direction and one or more spans along a second direction substantially perpendicular to the first direction; positioning the pre-fabricated beam rebar assemblies between adjacent precast columns, positioning each of the precast slab panels on support potions on the precast columns, assembling the beam cage and pouring the concrete into the molds for the beam cage to accomplish the structure of a single story; and repeating the steps of constructing the above-mentioned precast column array until completion of the structure of all stories of the building.

Disclosed is a column reinforcing structure using V-shaped tie bars, in which V-shaped tie bars and reinforcing tie bars are used together in a pre-assembled reinforcement when reinforcing an existing column by concrete jacketing such that it is possible to effectively confine the concrete while preventing buckling of main reinforcing bars without installing cross ties and construction can be carried out very quickly and simply.

A module for the production of concrete parts has a row of displacement bodies that are adjacently arranged in a horizontal longitudinal direction (L) and that are clamped captively to a grid structure made of at least two individual grids running in the longitudinal direction (L). Surfaces of the grids are oriented in a transverse or inclined manner in relation to the horizontal. Each of the grids has at least a first and a second longitudinal bar arranged at a distance in parallel to one another and running in the longitudinal direction (L) and a plurality of transverse bars being arranged at a distance from one another and oriented in a transverse or inclined manner in relation to the horizontal. The transverse bars are respectively connected with the longitudinal bars. One of the displacement bodies for each grid has a first and a second retaining device.

A cellulose-based structural building panel assembly includes a cross-laminated timber (CLT) core which is reinforced with one or more post-tensioned tendons stressed to a pre-selected tensioning force, following the placement as part of the panel assembly. The tendons are provided within a sleeve which is grouted with a channel formed in an underside of the core and which after post-tensioning of tendons is infilled with a binder securing the tendons in a fully bonded configuration.

A steel-fiber reinforced polymer (FRP) composite material reinforced concrete column comprises an inner steel pipe arranged in the center, wherein the inner steel pipe is internally provided with an unbonded steel strand; the outside of the inner steel pipe is provided with an outer steel pipe, concrete is poured between the inner steel pipe and the outer steel pipe, a plurality of additional small steel pipes are evenly arranged outside the outer steel pipe, and each of the additional small steel pipes is internally provided with an additional unbonded steel strand. A composite bar cage coaxial with the outer steel pipe and arranged on the outside thereof is also provided, wherein both the outer steel pipe and the composite bar cage are covered by high-ductility concrete, and at a core area, the outside of the high-ductility concrete is wrapped with an anti-spalling layer.

Various implementations include methods and apparatuses for constructing a concrete structure. In one implementation, a structure includes a pre-cast concrete column section and a pre-cast concrete beam section. The column section includes an embedded first assembly with a threaded rod, and the beam section includes an embedded second assembly defining a channel for receiving the threaded rod. Grout is fed through a joint between the column and beam sections into the second assembly to couple the threaded rod with the second assembly. The grout is urged through the joint and the second assembly by gravity and by applying vacuum suction to a grout port defined by the second assembly. The grout port extends between the channel of the second assembly and an external face of the beam section.

An apparatus for assembling a bedding foundation having a grid formed from rows of spring modules and a frame to support the grid may include a first portion including a sensing system configured to determine a size of the frame, a second portion including a stapling assembly having a plurality of staplers and a wire gripper coupled to each of the staplers, and a third portion configured to receive the bedding foundation and advance the bedding foundation relative to the first portion and the second portion.

The invention is an automated machine for reinforcement of piles, pillars, beams, and reinforcing cages in location of construction projects. This machine consists of main elements like loading arms and feeding jaws of longitudinal bars, rotating winch for stirrup and its guides, fixed and moving jaws and welding robot. It can be installed on a specified flat trailer in resting mode and come to an operative mode in project location and will be ready to use. To make reinforcing cages, an automated method for continuous winding of stirrup around longitudinal bars has been applied, and two intelligent welding systems (resistive spot and CO.sub.2 welding methods) have been utilized for joints in this machine.

A sleeve lock locks concrete reinforcing steel bars within rigid support structure retainers for stabilizing the reinforcing bars in place, while allowing the bars to spin freely within sleeves or holes within the retainers. The sleeve locks are stable couplings holding concrete reinforcing bars in position while allowing the bars to spin within the couplings. This reduces the need for tightening locks or fasteners at elevated heights of vertically positioned concrete reinforcing steel bars.

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.