A reinforced concrete structure comprising a hardened concrete containing at least one steel reinforcement, a plurality of anode cavities and interconnecting slots formed within the hardened concrete, with the interconnecting slots interconnecting adjacent anode cavities with one another. A discrete galvanic anode is installed within each of the anode cavities. At least one connector for connecting the plurality of discrete galvanic anodes with the at least one steel reinforcement. A plurality of interconnecting galvanic anodes which each comprises a metallic element which has an interconnecting connector extending from opposed ends thereof. Each of the interconnecting galvanic anodes is installed within a respective interconnecting slot. First and second ends of the interconnecting connector are respectively connected to adjacent first and second discrete galvanic anodes. Each interconnecting galvanic anode contains sufficient sacrificial metal to increase a total protection current delivered to the steel reinforcement.

An automated coiling system for post-tension tendons, comprising a frame, a tendon feed device adapted to introduce a tendon of widely varying length into a coiler assembly, a coiler assembly adapted to grip and coil the tendon within a fixed volume having a predefined diameter; a plurality of wire tying devices adapted to securely tie a wire around the tendon bundle of widely varying diameter in a plurality of predetermined positions and cut the wire after tying; and a tendon ejector device adapted to urge a tied tendon bundle from the coiler assembly.

A method of construction of composite wall module system in which a first wall module and a second wall module are coupled to the first wall module by a vertical joint. The vertical joint is comprised of plurality of anchors and reinforcement bars as well as steel side plates allowing composite wall steel faceplates to be discontinuous across the vertical joint. The faceplates of the first and second modules are not made continuous across the vertical joint through continuous welding. The vertical wall joint further includes fill disposed between faceplates and side plates adjacent to anchors and reinforcement bars.

A method of construction of composite wall module system in which a first wall module and a second wall module are coupled to the first wall module by a vertical joint. The vertical joint is comprised of plurality of anchors and reinforcement bars as well as steel side plates allowing composite wall steel faceplates to be discontinuous across the vertical joint. The faceplates of the first and second modules are not made continuous across the vertical joint through continuous welding. The vertical wall joint further includes fill disposed between faceplates and side plates adjacent to anchors and reinforcement bars.

In a first aspect there is disclosed a reinforcing spacer (10) for use in constructing a concrete slab. The spacer (10) includes a first reinforcing arm (12) having a first arm base (16), a first arm wall (18) and a first arm support surface (20) provided on the first arm wall (18). The spacer (10) further includes a second reinforcing arm (14), transverse to the first reinforcing arm (12). The second reinforcing arm (14) has a second arm base (22), a second arm wall (24), and a second arm support surface (26) provided on the second arm wall (24). The first arm support surface (20) includes a first arm recess (36), and a first arm inclined surface (46) which slopes towards the first arm recess (36). The second arm support surface (20) includes a second arm recess (56) and a second arm inclined surface (60) which slopes towards the second arm recess (56). In use the spacer is located on a top surface of a pod to support a reinforcing mesh.

In a first aspect there is disclosed a reinforcing spacer (10) for use in constructing a concrete slab. The spacer (10) includes a first reinforcing arm (12) having a first arm base (16), a first arm wall (18) and a first arm support surface (20) provided on the first arm wall (18). The spacer (10) further includes a second reinforcing arm (14), transverse to the first reinforcing arm (12). The second reinforcing arm (14) has a second arm base (22), a second arm wall (24), and a second arm support surface (26) provided on the second arm wall (24). The first arm support surface (20) includes a first arm recess (36), and a first arm inclined surface (46) which slopes towards the first arm recess (36). The second arm support surface (20) includes a second arm recess (56) and a second arm inclined surface (60) which slopes towards the second arm recess (56). In use the spacer is located on a top surface of a pod to support a reinforcing mesh.

The technology provides increased capability and control over the yield performance of the timber prop, a mine roof support. The new Wedge Prop design includes a cut pattern idealized for the specific wood species used in manufacturing and a set of confinement rings varying in strength due to different failure mechanisms. The cut pattern is based on the diameter of the yellow poplar pole, while the confinement rings consist of multiple types of welds to allow for either wire tensile failure or for weld detachment. The cut pattern can be combined in conjunction with various combinations of confinement rings to allow for precise control over the performance of the Wedge Prop in the Propsetter System.

The technology provides increased capability and control over the yield performance of the timber prop, a mine roof support. The new Wedge Prop design includes a cut pattern idealized for the specific wood species used in manufacturing and a set of confinement rings varying in strength due to different failure mechanisms. The cut pattern is based on the diameter of the yellow poplar pole, while the confinement rings consist of multiple types of welds to allow for either wire tensile failure or for weld detachment. The cut pattern can be combined in conjunction with various combinations of confinement rings to allow for precise control over the performance of the Wedge Prop in the Propsetter System.

In a first aspect there is disclosed a reinforcing spacer (10) for use in constructing a concrete slab. The spacer (10) includes a first reinforcing arm (12) having a first arm base (16), a first arm wall (18) and a first arm support surface (20) provided on the first arm wall (18). The spacer (10) further includes a second reinforcing arm (14), transverse to the first reinforcing arm (12). The second reinforcing arm (14) has a second arm base (22), a second arm wall (24), and a second arm support surface (26) provided on the second arm wall (24). The first arm support surface (20) includes a first arm recess (36), and a first arm inclined surface (46) which slopes towards the first arm recess (36). The second arm support surface (20) includes a second arm recess (56) and a second arm inclined surface (60) which slopes towards the second arm recess (56). In use the spacer is located on a top surface of a pod to support a reinforcing mesh.

In a first aspect there is disclosed a reinforcing spacer (10) for use in constructing a concrete slab. The spacer (10) includes a first reinforcing arm (12) having a first arm base (16), a first arm wall (18) and a first arm support surface (20) provided on the first arm wall (18). The spacer (10) further includes a second reinforcing arm (14), transverse to the first reinforcing arm (12). The second reinforcing arm (14) has a second arm base (22), a second arm wall (24), and a second arm support surface (26) provided on the second arm wall (24). The first arm support surface (20) includes a first arm recess (36), and a first arm inclined surface (46) which slopes towards the first arm recess (36). The second arm support surface (20) includes a second arm recess (56) and a second arm inclined surface (60) which slopes towards the second arm recess (56). In use the spacer is located on a top surface of a pod to support a reinforcing mesh.