Ask me anything abt Construction Industry!, Q&A
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 Dec 19 2014, 12:01 PM
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Junior Member
245 posts Joined: Apr 2008 
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I've always wondered how a multi-storey building are joined between each storeys. I can see steel rods poking out of a freshly made concrete column and as another level is being constructed, are these steel rods joined to the next floor up by welding or just somehow twisted together? Please enlighten.
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Dec 19 2014, 09:35 PM
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#2
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Junior Member
245 posts Joined: Apr 2008
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QUOTE(iwubpreve @ Dec 19 2014, 03:54 PM) good that u have curiosity Ok thanks for this. Looks like the lower lower steel bar and upper level steel bars are joined only by the concrete poured in (and the bars overlap each other), and they are not welded together (or other means). Makes one think what will happen if a strong horizontal shear force is applied to the column with the overlapping steel bars.  it's like the following picture. SFL mean slab finish level (eg. level 1), so the steel bar will come out from the slab with length 52D (meaning 52 x bar diameter, if the bar is 32Ø then the steel bar have to come out 1664mm from floor concrete). so when they wanna cast another storey, they will lap this steel bar then cast concrete again to continue.   |
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