In construction, concrete curbs are constructed using a form construction arrangement, usually made of wood or metal or a combination of wood and metal components. The form arrangement sets the general boundaries of the curb, much like a mold. The pourable concrete, which can be in a semi-solid state or be a slurry, is poured into the form arrangement. Once the pourable concrete has reached a sufficiently solid state, the form arrangement is removed and the curb is finished. In general, wood form arrangements always require metal pins or stakes for reinforcement of the wood boards that hold and shape the concrete. The present application describes a method of constructing a concrete curb or similar structure using a wood form construction arrangement that includes a bracket device that obviates the need for metal pins, or at least reduces the number of metal pins required to a very minimal amount.

A leg assembly includes a guide tube, a power drive coupled to a flange of the guide tube, a steering ring coupled to the power drive, a tube weldment coupled to the steering ring, and a hydraulic actuator coupled within the guide tube and within the tube weldment. The power drive includes a slew drive or a hydraulic cylinder steering assembly. The tube weldment is translated through the power drive by the actuator. The steering ring includes one or more pistons by which relative rotational movements may be imparted to the tube weldment by a socketing action. The steering ring is rotated by the power drive. Thus, the guide tube may be rotated relative to the tube weldment.

A prefabricated form for use in constructing a casting cured concrete curb having a plurality of engaging pieces in which adjacent engaging pieces are abutted. Each of the engaging pieces has a fixing rod insertion hole formed therein. A plurality of spacer insertion holes are formed longitudinally and aligned respectively with the fixing rod insertion holes. The plurality of plate-shaped lower spacers are received respectively of the plurality of spacer insertion holes. Fixing rods are respectively inserted into the fixing rod insertion hole so as to engage the plate-shaped lower spacers. A plurality of upper spacers are engaged with the upper ends of the fixing rods so as to fix the engaging pieces in spaced relation to each other.

An assembly for clamping formwork boards for forming an elongate slab having a lower base and an upper shaped gutter, includes first and second posts to be disposed on opposite sides of the slab to be formed. There is a formwork board clamping device for mounting to the posts, having jaws, the jaws including a first jaw mounted to the first post for retaining a first formwork board that forms a first side of the slab, and a second jaw mounted to the second post for retaining a second formwork board the forms a second side of the slab and a second side of the gutter. The second jaw has a post mount for a third board holder. The third board holder extends from the second jaw for retaining a third formwork board to be held over the slab to be formed that forms a first side of the gutter.

A curb former (10) is disclosed, and includes a rotatable drive shaft (20), a gutter drum (80), and a curb profiling drum (100). The gutter drum (80) is secured to the drive shaft (20) such that the drive shaft (20) and gutter drum (80) rotate together. The curb profiling drum (100) is detachably secured relative to both the drive shaft (20) and the gutter drum (80). This configuration allows one curb profiling drum (100) to be replaced with another curb profiling drum (100) to change the profile of a curb resulting from a curbing operation using the curb former (10).

Embodiments of the invention are directed to a trench former assembly and a method of constructing a trench using the trench former assembly. Typically, the trench former assembly comprises a forming member and a corresponding retention and removal system. The forming member is structured to facilitate forming the trench, while the retention and removal system is structured to suspend the forming member and support the forming member against displacement and rotation during forming of the trench. Embodiments of the invention are also directed to a dual-pour type trench former assembly for forming a multi-layer trench.

A concrete form bracket for holding in place concrete forms. The bracket may have horizontally extendable arms with pivotable concrete form engaging surfaces. One or more of the horizontally extending arms pivot from a central area and are independently extendable/adjustable to engage a concrete form at multiple locations.

A slipform paving machine includes an offset mold, including a mold frame, a form insert, a form insert actuator and a form insert sensor. A controller receives a signal from an external reference sensor and controls a position of the form insert actuator to control the height of the form insert relative to the mold frame and thereby control a height of at least a portion of a molded structure relative to a ground surface at least in part in response to the signal from the external reference sensor.

A curb former (10) includes a rotatable drive shaft (20), a gutter drum (80), and a curb profiling drum (100). The gutter drum (80) is secured to the drive shaft (20) such that the drive shaft (20) and gutter drum (80) rotate together. The curb profiling drum (100) is detachably secured relative to both the drive shaft (20) and the gutter drum (80). This configuration allows one curb profiling drum (100) to be replaced with another curb profiling drum (100) to change the profile of a curb resulting from a curbing operation using the curb former (10).

A slipform paving machine includes an offset mold, and a mold frame actuator which allows the height of the offset mold relative to the paving machine to be controlled. Internal actuators within the mold allow corresponding control of side form assemblies to control both height and profile of a resulting slipformed concrete structure.