Carrying Capacity

In other words, how much weight a creature can carry without penalties.
Healthy humans can carry about 15% of their body wight comfortably.
So to estimate this, we propose this formula:

Carrying Capacity (kg) = (Strength+Vigor)*3/4

For example, if you have Str=D6 and Vig=D8, your carrying capacity would be (6+8)*3/4=10,5 kg.
Hence, it is an extremely good idea for each group of suvivors to use at least one pack animal.