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Vertical spacing of openings in a RCC chimney

 
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shibinpshaji
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Joined: 22 Aug 2017
Posts: 10

PostPosted: Fri Jan 26, 2018 9:51 am    Post subject: Vertical spacing of openings in a RCC chimney Reply with quote

Is there any specification for the vertical spacing of flue inlet openings for a RCC chmney? (the openings are on the opposite faces of the chimney)
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N. Prabhakar
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Joined: 25 Apr 2009
Posts: 461

PostPosted: Sat Jan 27, 2018 6:02 am    Post subject: Reply with quote

Dear Er. Shibinpshaji,  

To the best of my knowledge, for RC circular chimneys, there seems to be no codal provisions on the vertical spacing of inlet openings located on the opposite side.  In the Chimney analysis, the appropriate sectional properties (area and MI) at opening locations are to be considered, and for the design of the section codal equations are to be used for the case with one opening.

For more rigorous analysis of the chimney, a 3-D FEM analysis may be carried out to find out local stresses around openings.

I trust you will find the above information useful.  

With best wishes,

N. Prabhakar, BE CEng(I) MIStructE (UK) MIE (Ind)
Chartered Structural Engineer
Vasai (E), Pin 401 208
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