Dungeons&D6:Strength
The Strength bonus is added to all checks involving brute strength, such as moving heavy objects. It is also added to rolled damage for melee weapons.
Strength determines Encumbrance. Characters may carry up to Strength/4 and be unencumbered. Characters may carry up to Strength/2 and be lightly encumbered. Characters may carry up to Strength and be encumbered. In extreme circumstances, they may carry up to Strength X 2 and be over-encumbered. Encumbrance acts as a negative adjustment on certain ability checks.