Strong Back

Strong Back is a Fallout, Fallout 2, Fallout Tactics, Lionheart and Fallout 3 Perk.

Fallout, Fallout 2 and Fallout Tactics

 * Requirements: Level 3, EN 6, ST 6
 * Ranks: 3
 * Benefit: You can carry an additional 50 lbs. of equipment for each level of this Perk.

Fallout 3
Since strength is capped at 10, regardless of bonuses, this perk matters more in Fallout 3 than any of the previous fallout games.
 * Requirements: Level 8, EN 5, ST 5
 * Ranks: 1
 * Benefit: You can carry an additional 50 lbs. of equipment.

Lionheart

 * Requirements: Level 2, EN 6, ST 6
 * Ranks: 3
 * Benefit: You can carry an additional 50 lbs. of equipment for each level of this Perk.

This is equivalent to 5 points of strength. This perk greatly increases the amount of weight you can carry.