Abstract:
The invention relates to an apparatus for the construction of monolithic of multi-level or pillar-framed buildings having suspended ceilings, said apparatus is provided with surface- and in given case working level-forming formwork shell surrounding the monolithic concrete form-space of the ceiling, formwork bearer supporting the formwork shell, furthermore actuating mechanisms, e.g. lifting units for lifting and lowering the formwork bearer, the actuating mechanism, e.g. lifting units are in force-transmitting connection directly or indirectly with a certain part, e.g. pillars of the temporary or permanent vertical load bearing structures of the building, load bearing elements, e.g. bear frame, connecting member, etc. are built in between the formwork bearer and the lifting units.The essence of the apparatus lies in that the units /7/ are interconnected preferably with storey-high intermediate members /8/ forming forced trajectory for the formwork bearer /3/, furthermore the intermediate members /8/ are provided with releasable hinged bearers /9/ fixed to the vertrical load bearing structure /1/ temporarily holding and temporarily releasing the intermediate members /8/ and allowing the inching movement of the lifting units /7/ .
Abstract:
In order to provide a form of foundation on which light-weight shuttering may be erected prior to pouring the concrete into the foundation, there is provided a method of forming a foundation for an excavated construction, comprising excavating to a predetermined depth, arranging pre-formed footing elements 2 in a required configuration on the base of the excavation 1, the said footing elements 2 having upper surfaces with means for locating shuttering 3, 4 for walls to be erected on the foundation, the footing elements also being adapted to receive reinforcing bars 5, 5a for the foundation and/or the walls, and subsequently pouring a concrete mix into the excavation to bond substantially monolithically with the footing elements. The footing elements need considerable strength, and they are preferably pre-formed in an open construction of concrete or a light-weight aggregate. The invention further includes footing elements as set forth above, and foundations made by the method.
Abstract:
This invention relates to a supporting structure to support a soffit, comprising at least two parallel spaced vertically disposed props connected together by a horizontal member, each prop being provided with a supporting head which supports the primary shoring beam for supporting the soffit. The beam extends between the props, one end being fixed longitudinally of the beam and the opposite end being variable longitudinally of the beam, two or more adjacent beams being telescoped one within the other.
Abstract:
A structure for supporting floor-molding forms in a multi-story building, including a truss that supports the forms and four telescoping leg units with upper ends pivotally connected to the truss, for supporting the entire weight of the truss on the previously-cast floor. The leg units are pivoted and telescoped out until the lower end of each leg unit lies on an area of the floor which is adjacent to a column or load-bearing wall of the building, within the 45.degree. shear plane lying about the column or wall, so that the weight of the truss and load thereon is transferred directly to the columns or walls to thereby eliminate heavy loading of the already-formed floor.
Abstract:
Concrete forming structures are provided particularly for use as horizontal floor forms or vertical wall forms. All such forms have a plurality of beam members placed across and secured to additional structural members such as trusses or stiffeners. Each beam is usually formed of extruded aluminum, and has an upper portion which has an open section in which an independent beam stiffening joist member may be secured. Sheeting, such as plywood panels which are usually used for concrete forming, may be nailed or screwed to a concrete forming structure at the independent beam stiffening joist members, which are usually wood. The deflection resistance of a beam having a wooden beam stiffening joist member secured in its upper portion is improved over that of a standard I-beam having an equal cross-sectional area of the same metal. Any of the concrete forming structures may be removed from the concrete when it has sufficiently cured, and "flown" using known construction cranes to another working position which may be several storeys above the floor from which it has just been removed.
Abstract:
A form for moulding a roof or intermediate floor slab for a substantially rectangular enclosure, the form comprising a plurality of substantially rectangular panels each defining a flat substantially rectangular moulding surface, the panels being designed so that they can be arranged and supported in chessboard array to define a substantially flat continuous moulding surface extending over said enclosure, said array being supported by an edge secured to the walls of the enclosure or to the form for casting these walls.
Abstract:
A shuttering unit facilitating the errection of a poured concrete structure and more particularly the pouring of individual rooms of a building in which the unit is to be reused and includes a ceiling and endwall shutter sections connected to opposed side wall shutter sections and in which slight inward displacement of the side wall shutter sections permits withdrawal of the unit from the room which has been poured; the end wall shutter section including a displacable portion facilitating inward movement of the side-wall forming shutter sections for facilitating withdrawal of the shutter unit from a poured room so that form work and pouring of the rooms and completion of the building can be expedited.
Abstract:
A shoring and scaffolding system. The system may be employed to support vertical loads such as freshly poured concrete floors in construction of buildings, bridges, etc., and may also be employed as scaffolding. The system includes a joint which connects aligned tubular members. The joint also connects channel elements, the latter displaying utility as horizontal stringers to support joist, as well as bracing elements. A pivotal loadbearing leg swings upwardly to permit the assembly to be moved to another locale.
Abstract:
Concrete forms are provided comprising an I-beam including a web and upper and lower flanges on the web. The flanges each have side edges and upper and lower surfaces between the edges. A hanger is supported on the upper surface of the upper flange. This hanger includes a strut which traverses the upper flange and also includes first and second U-shaped brackets straddling and connected to the strut at the ends thereof. The brackets have lower surfaces resting on the upper surface of the upper flange. One bracket is internally provided with a rectilinear receptacle extending at an acute angle to the upper surface of the upper flange and in a direction which is down and outward of the corresponding flange edge. This acutely disposed receptacle may also be perpendicular to the flange. The second bracket includes a portion extending below the upper surface of the upper flange and being engaged against the corresponding edge of the upper flange. This portion is provided with a rectilinear receptacle perpendicular to the upper flange and offset from the corresponding edge thereof. Concrete supporting members extend outwardly from the web and engage against the lower surface of the upper flange. Bolts extend through the aforesaid receptacles and concrete supporting members and locking means are provided on the bolts to hold the concrete supporting members in position. The hanger can be provided, in accordance with one embodiment, with a further U-shaped receptacle supported on an L-shaped arm connected to the aforesaid strut. The strut is preferably arranged at an angle to the supporting flange.
Abstract:
A supporting shore for a concrete ceiling slab, having a vertically and downwardly shiftable rotatable member which normally supports the adjacent truncated four corners of a quadrilaterally arranged group of four inverted generally rectangular pan-shaped slab-supporting domes and which, in the lowered and rotated position of the member, moves out of operative register with two of the four corners so as to release the other two corners for dome-removal purposes, while at the same time the shore continues to support the concrete ceiling slab until the latter has become fully hardened.