A corner shuttering element with two limbs arranged at an angle to each other, on the outer edge of which limbs, edge strips are arranged that can be retracted and extended by means of articulated levers, wherein the edge strips can each be aligned and fixed in their position by means of a plurality of locking elements arranged distributed over the height of the corner shuttering element, and wherein the locking elements are arranged on guides for pull-out webs of the edge strips.

A formwork core for a formwork system for concreting a bell body including a base frame and two corner supports detachably fastened at a variable distance. The corner supports each bear two corner connection panels, which are arranged at a right angle to each other around the corner and can be synchronously retracted and extended without touching each other. The corner supports also bear corner angle pieces, which likewise can be retracted and extended and, in the completely extended state, close the gap between the two associated corner connection panels in order to form a vertical outer shell of the formwork core. The vertical edges of the corner connection panels, which vertical edges are distant from the corner, have screw flanges facing inward. Optionally, at least one side formwork panel can be inserted between the corner connection panels one side.

The invention relates to a corner shuttering element with two limbs (12, 14) arranged at an angle to each other, on the outer edge of which limbs (12, 14), edge strips (16, 18) are arranged that can be retracted and extended by means of articulated levers (24, 26), wherein the edge strips (16, 18) can each be aligned and fixed in their position by means of a plurality of locking elements (34) arranged distributed over the height of the corner shuttering element, and wherein the locking elements (34) are arranged on guides (32) for pull-out webs (30) of the edge strips (16, 18).

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.

A stripping corner for an inside form, such as for forming the inside corner of an elevator core in building construction for pouring concrete, is provided that includes a powered actuator that forcibly collapses the perimeter of the inside form, particularly the inside corners of the form, to allow displacement of the inside form from the formed concrete surface to strip the inside form from the concrete.

A saferoom has a concrete floor, plurality of concrete walls, and concrete roof/ceiling connected without seams or joints. Pouring the concrete floor, the plurality of concrete walls, and the concrete roof/ceiling may be part of an integrated pour molded by forms. The method may further include vibrating at least one of the concrete floor, plurality of concrete walls, or concrete roof/ceiling to control the rate of change in viscosity and structural strength of the concrete. The integrated pour may further include pouring a footing. The forms may be reusable. Some of the forms may be angled and chamfered. The integrated pour may be a single pour. The method may further include attaching a sliding door. The method may include placing steel rebar reinforcing prior to starting the integrated pour.

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.

A stripping corner for an inside form, such as for forming the inside corner of an elevator core in building construction for pouring concrete, is provided that includes a powered actuator that forcibly collapses the perimeter of the inside form, particularly the inside corners of the form, to allow displacement of the inside form from the formed concrete surface to strip the inside form from the concrete.

A formwork core for a formwork system for concreting a bell body including a base frame and two corner supports detachably fastened at a variable distance. The corner supports each bear two corner connection panels, which are arranged at a right angle to each other around the corner and can be synchronously retracted and extended without touching each other. The corner supports also bear corner angle pieces, which likewise can be retracted and extended and, in the completely extended state, close the gap between the two associated corner connection panels in order to form a vertical outer shell of the formwork core. The vertical edges of the corner connection panels, which vertical edges are distant from the corner, have screw flanges facing inward. Optionally, at least one side formwork panel can be inserted between the corner connection panels one side.

An inner form assembly for forming concrete building shafts has a quadrant of boards and corner posts therebetween. Each corner post has angled interface surfaces converging towards exposed orthogonal skin surfaces. The boards have respective angled interface surfaces meeting respective angled interface surfaces of the corner posts so that the boards are held orthogonally by the corner posts. The angled interface surfaces of the corner posts and the boards slidably bear against each other and mechanically interlock with catches sliding along slots so that the boards move in together to form a compacted cross section configuration when the corner posts rise with respect to the boards and the boards move out to form an expanded cross section configuration when the corner posts fall with respect to the boards and wherein the orthogonal skin surfaces come into alignment with respective skin surfaces of adjacent boards.