Precast structural element and method for connecting the precast structural element to each other

(10) US 2021/0025157 Al

(22) 30.03.2019

(43) 28.01.2021

(57) The precast structural element is made by a method includ­ing preparing one or more layers of plurality of horizontal and vertical reinforcement bars. The method further includes fixing a plurality of hollow tubes to the layers at predefined locations by holding means. Specifically, the hollow tubes are provided with openings at predefined locations. The hollow tubes are characterized by having any one of plu­rality of protrusions, plurality of corrugation, plurality of ribs, plurality of serrations and combination thereof ...


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