As a branch of the post-tensioned prestressing system, external prestressing technique has become a hotspot of prestressing techniques in recent years.
体外预应力技术作为后张预应力体系的重要分支之一，近年来成为预应力技术的热点。
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This paper introduces an unbonded post-tensioned grid slab floor system with a suspended mezzanine underneath for ventilation installations constructed by lift-slab method.