"However, what a character carries should generally be limited to the following for the purpose of adventuring: a primary weapon, a secondary weapon, a suit of armor, shield, and enough other gear to fill a large backpack. This serves two purposes: making personal gear comparable between PCs, and allowing the GM to challenge players, since he knows they can't carry a solution to everything."
Modos RPG, page 20
This is for your average person. Have good strength? Carry a little more. Have weak strength? Carry a little less. Note that the "large backpack" should, pragmatically, get dropped at the start of a fight. But OD&D is a fantasy game, right?