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《1.5×6.0米预应力钢筋混凝土屋面板》(G410)图集出版以来,各地设计、施工单位在选用过程中,提出了一些问题,现就其中有关屋面板结构检验、钢筋机械性能和化学成分、面板设计、吊装验算等问题,分别介绍如下,供选用单位参考。 1.预应力钢筋混凝土屋面板使用前是否应进行结构检验?检验应包括那些内容? 答:屋面板使用前须按《钢筋混凝土预制构件检验评定标准》进行检验。其内容包括强度、刚度和抗裂性能检验,当用于使用阶段允许出现裂缝的条
Since the publication of the “Atlas of Prestressed Concrete Roofs of 1.5×6.0 Meters (G410)” (G410), various design and construction units have raised some issues during the selection process. The relevant inspections on the structure of the roof panels, the mechanical properties of the steel bars and the chemical composition , panel design, lifting inspection and other issues, respectively introduced as follows, for the selection of units to reference. 1. Should prestressed reinforced concrete roof slabs be structurally inspected before use? What should be included in the survey? Answer: Before the roof slabs are used, they must be inspected in accordance with the “Test and Assessment Standard for Reinforced Concrete Precasts.” Its content includes strength, stiffness, and crack resistance testing, and is used to allow cracks to appear during the use phase.