Abstract: A gypsum board according to the invention comprises • calcium sulphate dihydrate; • Tartaric acid in an amount in the range of 0.01 to 0.1% w based on the weight of calcium sulphate hemihydrate; • A fluidizer in an amount of 1.0 to 10.0 kg/m3; • Starch in an amount of 3.0 to 12.0 kg/m3.

Abstract: A seismic protective structure (100) for protecting a board partition (190). The protective structure (100) comprises a first stud (110), a second stud (120), and a wedge (140). The first stud (110) is mounted against a neighboring wall (150) and the second stud is being positioned spaced from the first stud so that a protective board (130) is mounted on the first stud and the second stud. The structure also comprises a wedge (140) mounted and positioned against the second stud (120) such that the protective board (130) mounted on the first (110) and second stud (120) is pushed at least partly out of the plane of the board partition (190) by the wedge (140) when a given level of seismic stress is appearing.

Abstract: A gypsum board according to the invention comprises • calcium sulphate dihydrate; • Tartaric acid in an amount in the range of 0.01 to 0.1% w based on the weight of calcium sulphate hemihydrate; • A fluidizer in an amount of 1.0 to 10.0 kg/m3; • Starch in an amount of 3.0 to 12.0 kg/m3.

Abstract: A seismic protective structure (100) for protecting a board partition (190). The protective structure (100) comprises a first stud (110), a second stud (120), and a wedge (140). The first stud (110) is mounted against a neighbouring wall (150) and the second stud is being positioned spaced from the first stud so that a protective board (130) is mounted on the first stud and the second stud. The structure also comprises a wedge (140) mounted and positioned against the second stud (120) such that the protective board (130) mounted on the first (110) and second stud (120) is pushed at least partly out of the plane of the board partition (190) by the wedge (140) when a given level of seismic stress is appearing.

Abstract: Seismic damage reducing system for partitions. A seismic protective structure (100) for forming part of a board partition (190) and for limiting damage to the board partition (190) when a given level of seismic stress is appearing, is described. The seismic protective structure (100) comprising a breaking mechanism (107) introduced near an upper corner and/or lower corner of board partition (190), wherein the breaking mechanism (107) is adapted for, when a given level of seismic stress is appearing, intentionally causing damage of the board partition (190) thereby releasing stress from the remainder of the board partition (190).

Abstract: Seismic damage reducing system for partitions. A seismic protective structure (100) for forming part of a board partition (190) and for limiting damage to the board partition (190) when a given level of seismic stress is appearing, is described. The seismic protective structure (100) comprising a breaking mechanism (107) introduced near an upper corner and/or lower corner of board partition (190), wherein the breaking mechanism (107) is adapted for, when a given level of seismic stress is appearing, intentionally causing damage of the board partition (190) thereby releasing stress from the remainder of the board partition (190).

Abstract: The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.

Abstract: The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.

Abstract: The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.

Abstract: The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.

Abstract: A materials handling and lifting appliance for a board or panel holder comprises, on a mast, telescopic elements controlled by a winch, and a device for articulating the board or panel holder articulatedly mounted on a shaft relative to a structure connected to the upper end of the telescopic elements at the upper end of the mast. The articulating device includes a support base shaped and designed to accommodate tilting of the holder into a horizontal, intermediate or vertical position. The board holder or panel holder is designed with a carrying arm, the length of which can be adjusted depending on the dimensions of the boards or panels to be picked up and positioned. The carrying arm includes handlebars fitted with control handles and mechanisms for controlling locking and unlocking of the articulating device. The handlebars facilitate tilting the board holder or panel holder into horizontal, intermediate or vertical positions.

Abstract: The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.

Abstract: A materials handling and lifting appliance for a board or panel holder comprises, on a mast, telescopic elements controlled by a winch, and a device for articulating the board or panel holder articulatedly mounted on a shaft relative to a structure connected to the upper end of the telescopic elements at the upper end of the mast. The articulating device includes a support base shaped and designed to accommodate tilting of the holder into a horizontal, intermediate or vertical position. The board holder or panel holder is designed with a carrying arm, the length of which can be adjusted depending on the dimensions of the boards or panels to be picked up and positioned. The carrying arm includes handlebars fitted with control handles and mechanisms for controlling locking and unlocking of the articulating device. The handlebars facilitate tilting the board holder or panel holder into horizontal, intermediate or vertical positions.

Abstract: The invention relates to a process for reducing the sagging of a gypsum-based element, such as a gypsum board. This process comprises the introduction into the gypsum-based composition, before the setting and hardening of the latter, of tartaric acid or tartaric acid salt(s), in a quantity greater than 0.001% by weight with respect to the weight of the calcium sulphate semihydrate contained in the gypsum-based composition. The invention also relates to a gypsum-based composition for such an element. This composition comprises, in percentages by weight with respect to the weight of the calcium sulphate semihydrate in the composition, from 0.003% to 0.45% of tartaric acid or tartaric acid salt(s) and from 0.05% to 0.95% of boric acid or boric acid salt(s).

Abstract: A production process for boards (9b,11), based on a hydraulic binder such as plaster, having thinned edges (10). This process, before the passage into the die (4, 403), the extraction of a lath (6, 23) from a lath magazine (20) and the introduction of this lath (6, 23) under the facing material (1) of the board. A production line for such boards (9b,11) as well as a device for the introduction of laths (6,23) under the facing material (1).