A formwork panel for concrete-work shutterings includes a supporting structure and a separate formwork skin connected to the supporting structure, characterized in that the supporting structure consists substantially of plastics material; and that the formwork skin, which is constituted by a single formwork skin element substantially of plastics material or by several formwork skin elements substantially of plastics material each, is releasably connected to the supporting structure.

A hinged corner for a construction form includes a first flange connected to a first mounting plate for a form member and a second flange connected to a second mounting plate for a form member. The first flange and the second flange pivot relative to one another in an overlapping relationship about a pivot point disposed between the first mounting plate and the second mounting plate.

The present invention corresponds to a formwork mechanism for casting and molding concrete, comprising a coffer having a sheet and four plates arranged around the sheet perimeter. Each plate has holes arranged on its front face. Also, the formwork mechanism includes a structural element, connected to one of the plates by fixing means. On the other hand, the structural element has lateral perforations that are aligned with the holes of one of the coffer plates. Fixing means pass through the holes and side holes. The structural element may be a beam, a three or four-beam T, and combinations thereof. On the other hand, using several coffers interconnected with structural elements, formworks are constructed for casting flat reticular slabs; and also for curved reticular slabs with greater slab thickness near the beams supporting the slabs in comparison to the span of the slabs.

A concrete form system including a barrier, a connection member, and a wall-base mold. In operation, two rows of barriers are connected with a connection member to define a channel for a concrete mixture. The concrete mixture is poured into the channel to form and set. The wall-base mold may be used to provide an additional extension to the channel used in construction. The wall-base mold is useful to aid in the construction of a residential building. The concrete form system is useful for providing a reusable concrete form.

A corner form apparatus having a rigid, angled form with a pair of leg sections and a plurality of gussets extending between the leg sections. A post is mounted for axial sliding back-and-forth movement within openings formed in the gussets between a pour position and a stripped position. A linear actuator is mounted between the rigid, angled form and the post and a pair of extension mounting arms are pivotally attached to the post at a first end and pivotally attached to each to an associated form extension using slotted holes at a second end whereupon movement of the post between the pour position and the stripping position moves each of the form extensions from a position coplanar with a corresponding one of the rigid, angled form leg sections in the pour position inwardly to a stripped position.

Various implementations described herein are directed to a formwork system. In one implementation, the formwork system includes aluminum extrusions and aluminum castings. The aluminum castings and the aluminum extrusions can be assembled by being pressed and riveted together.

A formwork panel for concrete-work shutterings includes a supporting structure and a separate formwork skin connected to the supporting structure characterized in that the supporting structure consists substantially of plastics material; and that the formwork skin, which is constituted by a single formwork skin element substantially of plastics material or by several formwork skin elements substantially of plastics material each, is releasably connected to the supporting structure.

A stay-in-place form comprises a plurality of elongated panels connectable to one another in edge-to-edge relationship. The plurality of panels comprises first and second panels connectable to one another in edge-adjacent relationship by a connection which comprises a contact joint. The first panel comprise a longitudinally extending first seal-retaining projection shaped to project outwardly from the outer surface of the first panel at a location spaced apart from a first outer-surface transverse edge of the first panel in a first transverse direction. The second panel comprising a longitudinally extending second seal-retaining projection shaped to project outwardly from the outer surface of the second panel at a location spaced apart from a second outer-surface transverse edge of the second panel in a second transverse direction opposite the first transverse direction. The first and second seal-retaining projections and the outer surfaces of the first and second panels defining at least a portion of a seal-receiving concavity which opens outwardly from the form when the connection is made.

A building form system including a plurality of forms for assembling into a wall template that is filled with concrete to create a building wall. The system includes a corner form assembly comprising an inner corner form and an outer corner form for disposition on a corner footing. The outer corner form includes walls angled from a bend. A pair of connectors are disposed on opposite ends from the bend. The inner corner form includes corresponding connectors for attachment to the outer corner form around a preset vertical rebar in the corner footing. The system further includes a base form extending between a first pair of connectors that include a peripheral wall disposed directly therebetween and the second pair of connectors for mating engagement with the first that include an inset wall spaced inwardly therefrom. Spacing between the peripheral and inset wall of adjacent base forms accommodating vertical rebar.

A concrete form system includes a plurality of concrete form board brackets. The plurality of brackets includes brackets for securing the concrete form board to a conventional type metal or wood concrete form stake without the need for nails. The plurality of brackets also includes concrete form board end brackets for securing the ends of adjacent concrete form boards together that allows for a range of angles to be formed between two adjacent concrete form boards from zero degrees to more than 180 degrees. The present invention also includes flexible sections of concrete forms configured to be coupled to the brackets that allow for forming curved concrete edges.