1 Cor 3:15, mentioned nothing about "saved yet so by
fire".
(I Cor., 3, 11-15) should be this to see the whole context
"For other foundation no man can lay, but that which is laid; which
is Christ Jesus. Now if any man build upon this foundation, gold,
silver, precious stones, wood, hay stubble: Every man's work shall
be manifest; for the day of the Lord shall declare it, because it
shall be revealed in fire; and the fire shall try every man's work,
of what sort it is. If any man's work abide, which he hath built
thereupon, he shall receive a reward. If any man's work burn, he
shall suffer loss: but he himself shall be saved, yet so as
by fire."
Simalry for the rest of verses. It is you who quote the verses out
of context.