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Development Length at External Joint (Advice needed)

 
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Pramod123
SEFI Member
SEFI Member


Joined: 06 Apr 2020
Posts: 1

PostPosted: Wed Sep 23, 2020 4:52 am    Post subject: Development Length at External Joint (Advice needed) Reply with quote

Hello Sefians,
I am little confused in IS codes regarding development length in an external Beam-column joint.
My confusions are :
1.If Ld in Top & Bottom bars of beam=Ld in tension+10d-90 bend allowance (IS 13920:1993,cl 6.2.5),why there is value of Ld for Tension bars and compression bars in (SP-16:1960 ,Table 65),Isnt Ld value for Tension bars enough ?
2.Allowance for 90 bend is given only for Tension=8*d (SP-16,cl 5.2),What is the allowance for 90 bend for compression ?
3.For Fe415 ,M20 concrete grade and 16mm dia bar ,What will be the Ld for upper and lower bars as in picture ?
In my opinion is it:Ld of upper bar(Compression)=Ld for Tension+10*dia
                 :Ld for Lower bar(Tension)=Ld for Tension+10*dia-8*dia




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