Introduction
Lifting Strength is defined as the mass that an individual can lift on Earth.
Pushing and pulling feats are considered a part of this statistic. Tearing and crushing feats are also included in this category. Telekinesis or other similar abilities must be specifically referred to as separate from physical strength, when used in a lifting feat.
Lifting strength is generally not directly comparable to Striking Strength. The two statistics should be evaluated separately.
Lifting is a sustained action with more time to apply force. Muscle fiber force production is determined by the force-velocity relationship between muscle and muscle-tendon units. When external resistance is high, tendons stiffen, so muscle and muscle-tendon units contract at the same speed, resulting in higher force.
That said, the inverse is true in fiction. It is a common feature within fiction to feature characters capable of vastly greater physical striking strength energy outputs than what would be required to lift weights that they are repeatedly shown to struggle with.
Lifting Strength Levels
Below Average Human: 0 to 50 kg
Regular Human: 50 to 80 kg (The mass of an adult human, or a large dog)
Above Average Human: 80 to 120 kg (The mass of a washing machine, or a tumble dryer)
Athletic Human: 120 to 227 kg (The mass of a mature lion)
Peak Human: 227 to 460 kg (Olympic weight-lifters)
Superhuman: ? (Any level clearly above peak human that does not have an exact value. Effort should be made to calculate the true value based on feats, but until then this is a placeholder)
Class 1: 460 to 1000 kg (The world record for deadlifting feats in real life)
Class 5: 1000 to 5000 kg (Capable of lifting small trucks, etc.)
Class 10: 5000 to 10^4 kg (The mass of an adult elephant)
Class 25: 10^4 to 2.5x10^4 kg (The mass of Big Ben's bell, a truck, a large motorboat)
Class 50: 2.5x10^4 to 5x10^4 kg (The mass of a semi-trailer truck)
Class 100: 5x10^4 to 10^5 kg (The mass of a tank)
Class K: 10^5 to 10^6 kg (The mass of the largest animal: blue whale, the heaviest of air-crafts)
Class M: 10^6 to 10^9 kg (The mass of the largest ship)
Class G: 10^9 to 10^12 kg (The mass of the human world population, the largest man-made structures)
Class T: 10^12 to 10^15 kg (The mass of the heaviest mountains)
Class P: 10^15 to 10^18 kg (The mass of small moons or small asteroids)
Class E: 10^18 to 10^21 kg (The mass of the atmosphere of the Earth)
Class Z: 10^21 to 10^24 kg (The mass of large moons or small planets)
Class Y: 10^24 to 10^27 kg (The mass of larger planets)
Pre-Stellar: 10^27 to 2x10^29 kg (The mass a solid object can reach before the gravitational collapse to a small star)
Stellar: 2x10^29 to 6.3x10^32 kg (The mass of a smaller star up to the most massive star)
Multi-Stellar: 6.3x10^32 kg to 1.6x10^42 (The mass of the most massive star to the mass of the Milky Way)
Galactic: 1.6x10^42 kg to 6x10^43 kg (The mass of the Milky Way to the mass of the most massive galaxy)
Multi-Galactic: 6x10^43 kg (The mass of the most massive galaxy up to the mass of the observable universe)
Universal: 1.5x10^53 kg and higher (The mass of the observable universe up to any higher finite value)
Infinite (Countably infinite strength by 3-dimensional standards)
Immeasurable (Beyond 3-Dimensional concepts of mass: 4D hypermass lifting level and above. Meaning: Level Low 2-C to High 1-B.)
Irrelevant (Beyond all dimensional scale. Meaning: Tier 1-A and above.)
Notes
Neck-snapping feats should not be used as justification. Many of these feats are outliers, with characters failing to demonstrate the same level of strength in other situations. There is also high variability in how the feat can be performed, so generalization is difficult. Technique can greatly reduce the amount of strength neccessary to break a neck. Bodyweight can also play a role, with several incidents demonstrating such injuries.