Strength

Strength measures bodily power, athletic training, and the extent to which you can exert raw physical force.

Strength Checks

A Strength Ability Check can model any attempt to lift, push, pull, or break something, to force your body through a space, or to otherwise apply brute force to a situation.

Skills

The Athletics skill reflects aptitude in certain kinds of Strength checks.
Other Strength Checks. The GM might also call for a Strength check when you try to accomplish tasks like the following:

• Force open a stuck, locked, or barred door
• Break free of bonds
• Push through a tunnel that is too small
• Hang on to a wagon while being dragged behind it
• Tip over a heavy statue
• Keep a boulder from rolling

Attack Rolls and Damage

You add your Strength modifier to your Attack roll and your Damage roll when attacking with a melee weapon such as a Mace or a Battleaxe. You use melee weapons to make Melee Attacks in hand-to-hand combat, and some of them can be thrown to make a Ranged Attack.

Lifting and Carrying

Your Strength score determines the amount of weight you can bear. The following terms define what you can lift or carry.
Carrying Capacity. Your maximum carrying capacity is your Strength score multiplied by 15. This is the weight (in pounds) that you can carry. Keep in mind that many small items or a large, unwieldy item may still be difficult to carry even if they fall under the weight capacity.
Push, Drag, or Lift. You can push, drag, or lift a weight in pounds up to twice your carrying capacity (or 30 times your Strength score). While pushing or dragging weight in excess of your carrying capacity, your Speed drops to 5 feet.
Creature Size and Strength. Larger creatures can bear more weight, whereas Tiny creatures can carry less. For each size category above @medium, double the creature's carrying capacity and the amount it can push, drag, or lift. For a Tiny creature, halve these weights.