THE "JACKBLOCK" SYSTEM OF!
Details of this revolutionary system of building, which is of particular advantage during the rainy season, are reprinted, by permission of The Builder magazine, London, in which the article first appeared, and of Messsrs. Richard Costain Ltd., devisors and developers
of the system.
Below Left: Three phases during construction starting with the roof slab at ground level; polythene sheeting covering two platforms of steel scaffolding made a light air condi- tioned factory through which the building is extruded. Below Right: Section showing progress reached by the end of stage 7; floors from 5 upwards are completed; floor 4 is undergoing floor finishes and painting; floor 3 fixings and painting; floor 2 plastering and cladding; floor 1, parti- tions, first fixings, floor screeds and plumbing; and ground floor casting and pre-tensioning and electrical work; on completion of the framework, the jacks are replaced by reinforced concrete.
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Løsl___ 16.
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