Static structures (e.g. – buildings) – Processes – Barrier construction
Patent
1998-04-13
2000-04-04
Safavi, Michael
Static structures (e.g., buildings)
Processes
Barrier construction
249 34, 264 31, E04G 2102
Patent
active
060446145
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to building structures formed substantially of concrete, and to methods of building construction using concrete. In particular it relates to formwork and associated supports for the construction of walls, raked roof beams and columns, etc. for buildings formed of concrete material.
DESCRIPTION OF PRIOR ART
There are disadvantages in the commonly used building practices used by builders, particularly for the construction of small buildings, where a large number of sub-contract trades people have to be managed.
The "concrete-tilt-up" system introduced over recent years leaves much to be desired. The preformed slabs used in such system can only be handled by the use of special lifting equipment, and, if sealing between the joints is not correctly performed, moisture and insects may ingress the building. Structural stability of the upright wall is a disadvantage in this system.
Timber places high demands on forests, which are being increasingly valued for their environmental and quality-of-life benefits, and also, is subject to termite attack.
Concrete has various inherent advantages, including strength, durability and supply and price stability, and is generally used where physically possible. Reinforced concrete is used in large scale constructions to an extent where it is almost universal, demonstrating its effectiveness as a building material.
Prior art construction methods of forming up and pouring concrete walls in-situ are cumbersome. The provision of formwork is labour intensive, having to be erected by tradesmen, and, a large proportion of such materials are non-reusable after the concrete is poured. The formwork on both sides of any wall is tied together using bolts passing through the wall cavity, which not only results in a wall having many holes passing through it requiring filling, but, the bolts are expensive and are labour intensive to insert and remove.
The disadvantage of the previous formwork systems conclude that they were cumbersome, and costly in the way in which upright formwork panels have to be assembled and manually supported in their upright position or tied together with bolts or steel ties.
Fixing removal ties rods to hold the pair of parallel opposing panels together is restrictive, and a two person job. Reliable quality control checking points and wall insulation are difficult to introduce in known formwork systems, and, the majority of the work in known formwork systems require at least two persons, or heavy lifting machinery.
More recently, there has been proposed a method and apparatus for constructing walls of a building or other structure from pourable concrete method which overcomes many of the disadvantages of the prior art concrete construction methods. That method, invented by the inventor of the present invention, is described in the Applicant's Australian Patent No. 647783.
In short, that method comprises the following steps: to be formed; vertical surfaces of the wall to be formed along a wall line and for defining a wall cavity therebetween for receiving the pourable material; apart with spacing means positioned outside of the wall cavity; foundation at the preset distance apart with securing means positioned outside of the wall cavity; the reinforcing means to outer surfaces of the at least one pair of panels; and, whereby the wall so formed is free from unwanted passageways and/or cavities generated by clips or other structure reinforcing the panels.
The apparatus described in Australian Patent No. 647783, comprises a combination for forming such walls including: surfaces of the wall to be formed and for defining a wall cavity therebetween for receiving the pourable concrete material; outside of the wall cavity and spacing the top edges a preset distance apart; outside of the wall cavity securing the bottom edges of the panels the preset distance apart; of the at least one pair of panels; and/or cavities generated by the combination.
Whilst the method and apparatus described in the Applicant's Australian Patent No. 647783
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Newtec Concrete Construction Pty Limited
Safavi Michael
LandOfFree
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