| 摘要 |
A temporary positioner for holding U-shaped metal reinforcing elements (1) for concrete structures consists of a trapezoid-section timber plank (2) with two lengthwise parallel grooves (3) in its surface corresponding to the smaller base of the trapezium to receive the free ends of the reinforcing elements, which are turned over at a right angle. After fitting the reinforcing elements the plank is completely covered with a thermoshrink layer of synthetic (PVC) film. One end of the plank is fitted with a loop (5) in the form of a strong and flexible strip or cord for handling it, and the side of the plank opposite the grooves is fitted with a lengthwise strip or rod for removing the film once the concrete structure has set. Easier removal of supporting plank after the concrete has set.
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