This paper analyses causations of precastfloor slab crack in engineering from the aspects of design, material and construction.
本文从设计、材料、施工三方面，详细分析了工程中预制楼板板缝开裂的原因。
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Directing to the serious situation in floor crack, find the reasons of appearing cast-in-situs crack and precast board crack, and put forward prevention-cure measures.