Static structures (e.g. – buildings) – Installed screed or unit with specified feature retaining...
Patent
1984-01-30
1986-07-08
Perham, Alfred C.
Static structures (e.g., buildings)
Installed screed or unit with specified feature retaining...
52250, 52251, 52263, 52371, 52396, E04B 532, B28B 724
Patent
active
045985170
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an arrangement for use when casting concrete floors, particularly in locales incorporating pillars, floor drains or the like. The invention also relates to a method for manufacturing concrete beams forming part of the arrangement.
BACKGROUND ART
In order to rationalize to some extent the casting of concrete floors, it has been proposed to use concrete beams as combined stop-ends and screed guides for concrete smoothing devices, the beams being embedded in the floor with the upwardly facing surfaces of the beams flush with the resultant floor surface. This eliminates the task of stripping the formwork, and hence the various spans can be cast in sequence, since adjacent spans can be cast simultaneously.
Among other things, however, these known methods do not solve the problem of providing non-contacting or isolated areas around pillars, floor-drains and the like, in a ready and simple fashion. Pillars which are not sufficiently isolated from the floor as the floor is cast, will ultimately be in load-transferring contact therewith, inter alia as a result of shrinkage stresses occurring in the concrete. This means, among other things, that when a pillar is subjected to heavy loads, which tends to cause the pillar to settle, the floor will also be subjected to stress, causing cracks to form. In addition, the pillar itself obtains therearound an area of concentrated stresses, which can readily cause the pillar to crack.
Those methods used today for isolating pillars from the surrounding floor either do not provide a satisfactory result or require a large amount of additional work. Moreover, they require the floor to be cast in a plurality of stages.
The known concrete beams used as combined stop-ends and screed guides for co-action with concrete-smoothing devices are also encumbered with certain additional disadvantages. For example, they do not prevent relative movement between adjacent floor sections in the longitudinal direction of the beams. Furthermore, the webs of the beams are provided with open holes, through which reinforcing rods or the like can be passed. In order to enable the reinforcement to be compactly formed in a selective fashion, the webs of respective beams must be provided with a large number of holes, of which only a relatively small number are used in each individual case. This results in copious leakage of concrete through the beams, which is highly unsatisfactory when the beam is also to serve as a stop-end.
OBJECT OF THE PRESENT INVENTION
An object of the present invention is to provide a solution to the aforementioned problems, which manifest themselves when casting concrete floors which include pillars, floor drains and the like.
DISCLOSURE OF THE INVENTION
Accordingly, the present invention comprises an arrangement of the aforesaid kind which is characterized in that said arrangement includes straight concrete-beams which are intended to be incorporated in the cast floor, and sections of arcuate concrete-beams, said arcuate sections being arranged to co-act so as to fully encircle a free-standing pillar or the like, or to partially encircle a pillar located adjacent a floor-defining wall; in that the arcuate sections are provided with a lower support flange for supporting the ends of respective straight beams; and in that the height of the straight beams is so selected in relation to the height of the arcuate sections that when the straight beams rest on said support flanges, the upper surfaces of said straight and said arcuate beams lie in a common plane, flush with the upper surface of the resultant floor, in order to serve as guide surfaces for concrete-smoothing devices.
An arrangement of this kind enables the concrete formwork to be laid for a complete floor simultaneously, and, if time permits, for a complete floor to be cast continuously, in a single working operation, it being possible to advance the concrete-smoothing devices along the straight beams, and to pass said devices readily around the pillars present, since
REFERENCES:
patent: 1764134 (1930-06-01), Young
patent: 1844310 (1932-02-01), Bowman
patent: 1922472 (1935-08-01), Chamberlain
patent: 2029817 (1936-02-01), Fegles
patent: 2491488 (1949-12-01), Faulwetter
patent: 2711127 (1955-06-01), O'Day
patent: 3228161 (1966-01-01), McCown
patent: 3908323 (1975-09-01), Stout
patent: 4102100 (1978-07-01), Perreten
Perham Alfred C.
Tremix AB
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