DC 92 32/ 33 RC
I have just found same old material regarding this topic.
DC 9 AFM supplied charts to calculate " WEIGHT FOR MINIMUN RUNWAY LENGHT AND SPEED DETERMINATION". Depending on DA conditions it was a minimun ATOW for a balance TO.
When OAT or PA decrease, Vmcg increases, and therfore the minimun TOW is higher to comply with V1/Vmcg restictions.