Abstract:
A composite floor system includes a plurality of joists (10, 12), each having a top (14) and bottom (16) chord and a web (18) in the space between the chords. The top chord (14) includes a pair of angle bars (30, 28), each having a vertical leg of differing heights and a horizontal leg. The top of the web extends between the vertical legs of the chord to a point between or level with the top of the larger vertical leg (38) of the angle bars. Decking (42) is supported by the horizontal legs (32, 36) of the chord of adjacent joists and a concrete slab (44) poured on the decking and between the vertical legs of the top chord to provide bonding between the concrete slab, top chord and web.
Abstract:
The present invention refers to a method to increase the adherence between a relatively glossy surface, e.g. a steel surface and a substance which can be applied on or around said surface which is pourable and solidifies to a rigid form. The object of the invention is to provide a simple and a relatively cheap method to increase the adherence without that the glossy surface being exposed to deformations or weakenings, and which adherence should be accomplished on even surfaces as well as on single or double curved surfaces and also in recesses which are difficult to access. These objects have been solved by that a glossy surface which is provided with a glue layer or the like is coated in an electrostatic way, alternatively is coated with artificial fibres so-called fibre flocks, which are raised from the surface, covering an essential part of its surface, whereby the green concrete is applied against the fibre flock.
Abstract:
A tray (11) for a composite deck comprises a sheet steel profile with a wide lower flange (12) as a bottom, two webs (13, 14) and stiff upper flanges (15, 16) that extend above an insulation board (22) in the tray. The insulation board is not cemented to the steel. It is stiff enough to permit people to walk on it and to prevent the webs from tilting inwardly. The webs of adjacent trays support each other so that they cannot tilt outwardly.
Abstract:
Profiled sheet metal shuttering (1) for composite concrete ceilings (2) has parallel ribs (3) of trapezoidal cross-section which open downward and folds (4) in the sheet metal which open upward between the ribs (3). The folds (4) are corrugated in the longitudinal direction. The amplitudes of the generatrices of the corrugations reach a maximum at the free, upper edge (5) of the fold and decrease to zero at the lower edge (6). The ratio of the amplitude (a) to the half-wavelength (1/2) at the upper edge (5) of the fold is between 0.01 and 0.07.
Abstract:
Weighbridge consisting at least partially of cast concrete portions, and method of producing such a bridge. With the object of increasing the accuracy of a weighbridge, of facilitating and cheapening the production of a weighbridge, it is proposed according to the present invention that the bridge (1) should be disposed resting against two beams (5) which are disposed along the long sides of the bridge and supported by transmitter members (6), that at least two transverse beams (7) are disposed secured between the longitudinal beams (5) of the bridge, preferably at the short sides of the bridge, that the cast portions of the bridge are surrounded by an edge lining (3) preferably of sheet metal bearing downwards against the tops of the beams (5, 7), and that the cast portions preferably comprise a corrugated or profiled bottom metal sheet (12) resting substantially against the longitudinal beams of the bridge. As a result of the invention, it becomes possible to cast the weighbridge on site above the longitudinal beams, and the mould formed by the edge lining, beams and metal sheets does not have to be removed after the cast concrete has set.
Abstract:
A composite floor system includes a plurality of joists, each having a top and bottom chord and a web in the space between te chords. The top chord is formed with a pair of horizontally extending legs and at least one vertical leg. The top of the web is attached to the bottom surface of the top chord. Metal decking is supported by the horizontal legs of the top chord of adjacent joists and a concrete slab is poured on the decking and encloses the vertical leg of the top chord.
Abstract:
A number of module molds (1,9) comprising a web (2,2'), a plurality of reinforcing ribs (5,5'), an insert piece (7) at one end of the web, a deposit margin (6) at the other end of the web, and abutments (8,8') at both side ends of the web, are arranged in line and in file along beams (11) and concrete is placed over the arranged molds.
Abstract:
A structural member for use in the construction of composite slabs for flooring systems of buildings is disclosed. The structural member comprises: (a) a profiled steel sheeting (3) having a plurality of parallel ribs (5) separated by pans (6); (B) a plurality of top chord elements (7) spaced above the steel sheeting (3); and (c) a plurality of web chord elements (9) connecting together the steel sheeting (3) and the top chord elements (7) with each web chord element (9) being connected to one of the pans (6) or to adjacent pans (6); such that the steel sheeting (3), the top chord elements (7), and the web chord elements (9) define at least one truss.
Abstract:
The invention relates to the building industry and more particularly to a metal ribbed formwork (1) having a cross-section with polygonal ribs, which is further provided with local inset deformations (7) formed in the edges (2, 3) of the ribs, said deformations forming series of narrowings of the lands (4, 5) which are anchored in the concrete. The invention also relates to a machine for fabricating such sectional elements. The formwork according to the invention is intended to the construction of high span collaborating floors.