Which is the usable ranges for amateur TTBB choir

Please give me the safest ranges for each part

Interesting; this is what some site gives for Barbershop Quartet, but these are soloists!

From highest to lowest, the voice parts in barbershop are tenor, lead (melody), baritone, and bass. The following graphics indicate the common vocal ranges by gender of the four parts used in barbershop arrangements:

Male:

http://www.barbershop.org/wp-content/uploads/2018/06/malerange.jpg

Note the subscript 8 under the treble clef to indicate that it sounds an octave lower than written. This is traditional TTBB notation.

For four average male singers, I would just keep it, keeping in mind that with really good singers (pro or talented amateur) one can stretch the ranges a bit.

Amateur tenors can't keep pounding out that high G; prepare it and don't overuse it. Basses as opposed to baritones might not like a whole lot of that E, so usually don't go higher than a D. Something I post like Part Songs or sacred music will take tenors (and sopranos) to A, basses as low as f below g, as high as the high e or even f occasionally, but that would be if I was thinking soloists, and I don't intend that stuff for amateurs.

Edited 3 hours ago3 hr by Churchcantor

Thanks sir so you say tenor 1 should be kept at g4 for practicality