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 lift drive for a rail-guided cantilever construction device. The cantilever construction device comprises a main frame guided by at least one rail for receiving at least one formwork. The lift drive comprises a lift device, a first end of the lift device is designed to be connected to the main frame, and a second lift device end opposite the first end can be moved relative to the main frame when the first end of the lift device is connected to the main frame; a first fixing device connected to the first end of the lift device and designed to fix the first end of the lift device with respect to the at least one rail; and a second fixing device connected to the second end of the lift device and designed to fix the second end of the lift device with respect to the at least one rail.

A lift drive for a rail-guided cantilever construction device. The cantilever construction device comprises a main frame guided by at least one rail for receiving at least one formwork. The lift drive comprises a lift device, a first end of the lift device is designed to be connected to the main frame, and a second lift device end opposite the first end can be moved relative to the main frame when the first end of the lift device is connected to the main frame; a first fixing device connected to the first end of the lift device and designed to fix the first end of the lift device with respect to the at least one rail; and a second fixing device connected to the second end of the lift device and designed to fix the second end of the lift device with respect to the at least one rail.

The invention relates to a traveller (1) for the construction of engineering works, comprising two structures, namely: a securing structure (2) for securing to the already built engineering work, and a working structure (3) on which construction of the work advances. The traveller is characterized in that the securing structure (2) comprises: a first end ring (6) and a second middle ring (7), both of said rings (6, 7) being coupled to the periphery of the section (27) of the already built work; at least one transom bar (9) that joins the end ring (6) and the middle ring (7) on the side of the carriage (1); and connecting elements between the end ring (6) and the middle ring (7). The working structure (3) comprises exterior formwork (25) and floor formwork (23).

The invention relates to a traveller (1) for the construction of engineering works, comprising two structures, namely: a securing structure (2) for securing to the already built engineering work, and a working structure (3) on which construction of the work advances. The traveller is characterized in that the securing structure (2) comprises: a first end ring (6) and a second middle ring (7), both of said rings (6, 7) being coupled to the periphery of the section (27) of the already built work; at least one transom bar (9) that joins the end ring (6) and the middle ring (7) on the side of the carriage (1); and connecting elements between the end ring (6) and the middle ring (7). The working structure (3) comprises exterior formwork (25) and floor formwork (23).

Overhang structure for bridges including a horizontal section (41) and an upwards section (42). The horizontal section (41) has at least one integral horizontal profile (7) at its free end. It may also include a strip made of a malleable material on the lower side of the horizontal section (41). The construction method includes the steps of: placing a set of rods near an outmost edge of an outmost beam; placing the beam on its supports; placing a set of overhang structures on the rods, so the profiles are close to the rods; and affixing the structures to the beams with a retainer in each rod.

Overhang structure for bridges including a horizontal section (41) and an upwards section (42). The horizontal section (41) has at least one integral horizontal profile (7) at its free end. It may also include a strip made of a malleable material on the lower side of the horizontal section (41). The construction method includes the steps of: placing a set of rods near an outmost edge of an outmost beam; placing the beam on its supports; placing a set of overhang structures on the rods, so the profiles are close to the rods; and affixing the structures to the beams with a retainer in each rod.

An apparatus which includes an expandable lift device; and an expandable bridge span. The expandable lift device is configured to raise the expandable bridge span, while the expandable bridge span is in a compressed state and is substantially aligned with the expandable lift device. Next, the expandable bridge span is configured to rotate about ninety degrees with respect to the expandable lift device, while the expandable bridge span is in the compressed state; and thereafter the expandable bridge span is configured to expand perpendicularly to the expandable lift device. The apparatus may further include first and second staircases, which are configured to be attached to first and second ends, respectively of the extended expandable bridge span. A method is provided of deploying the apparatus to provide a removable bridge structure.

An apparatus which includes an expandable lift device; and an expandable bridge span. The expandable lift device is configured to raise the expandable bridge span, while the expandable bridge span is in a compressed state and is substantially aligned with the expandable lift device. Next, the expandable bridge span is configured to rotate about ninety degrees with respect to the expandable lift device, while the expandable bridge span is in the compressed state; and thereafter the expandable bridge span is configured to expand perpendicularly to the expandable lift device. The apparatus may further include first and second staircases, which are configured to be attached to first and second ends, respectively of the extended expandable bridge span. A method is provided of deploying the apparatus to provide a removable bridge structure.