Hi

I would like to ask you few basic doubts regarding SIF

1)when we are over riding the SIF for Lateral branch connection,do we need to enter SIF in all three pipes which is framing into the tee?if yes what is the reason?

2)there are two sets of SIF (Branch SIF& Header SIF)is calculated in Caesar SIF calculator,for the stress Calculation which SIF is using ,branch SIF or Header SIF?

3) What is effective Section Modulus How can we calculate it?

Regrads
SB