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[nitesh]

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dear all
i have question/query
If the r/f in slab is placed as main r/f placed above distribution r/f
in case of one way slab, What is the effect on load distribution?
it totaly wrong or
how much it is acceptable?

Sandeep Nimbalkar
Nitesh Raut
Giriraj Taori

GOvt. COllege of Engineering, Karad

Posted via Email

[kunal at sercm.csir.re...]

Dear Friends of Karad,

There is a simple logic associated here. For same Ast, fck, fy and b, about 10 mm increase in effective depth will add roughly 4 kN.m moment of resistance. Hence, for same quantity of concrete and reinforcements just by placing main reinforcement at bottom (thus increasing effective depth of section by a few mm) the moment carrying capacity of the section can be increased a little. I suppose it will not be difficult for you to perform a simple exercise. Employ the formula of IS456 for computing moment of resistance of a section with other values same and with varying effective depth. Plot eff. depth v/s M.R. and observe the pattern.

As far as effect on distrubution is concerned, I suppose there will not be much effect since the secondary reinforcements are assumed to resist temperature and shrinkage stresses (secondary stresses). A few mm up or down will hardly affect their function.

I hope this will make you clear.

With pleasant regards,

(Kunal Kansara

---------------------
dear all
i have question/query
If the r/f in slab is placed as main r/f placed above distribution r/f
in case of one way slab, What is the effect on load distribution?
it totaly wrong or
how much it is acceptable?

Sandeep Nimbalkar
Nitesh Raut
Giriraj Taori
GOvt. COllege of Engineering, Karad

Posted via Email