In the world I'm working on human civilization is mostly dead and the planet is gripped in nuclear winter. Most of the people who've survived are cyborgs. While these cyborgs are still humanoid they vary in weight. A cyborg with the size and proportions of an average human can vary in weight from 30 to 250 KG. Under which terrain would these cyborgs have to worry about ground pressure?
The main terrain I'm interested in are: snow, road/highways, concrete.
I want to use this to introduce people to the concept of ground pressure. There would be a scene where a lighter civilian cyborg walks on top of the snow while a heavier military/sports/luxury cyborg has to march through the snow. My main question on this is how light would someone need to be in order to walk on top of snow assuming average surface area of human male feet?
Without human maintenance the quality of the highways deteriorated quickly. Before the war period would society need to set laws preventing cyborgs from running at super human speeds (>45kmh) to prevent them from destroying the roads?
How high would pressure need to be in order to leave foot prints on concrete? How much force could they exert unto the ground before it breaks. Would they benefit from jumping on all fours in order to avoid losing energy to the concrete breaking underneath them?
Ice covered lakes
Due to the nuclear winter many bodies of water have frozen over. My question for this is how would smaller holes effect the stability of the surrounding ice. i.e. if a cyborg decided to balance on one toe which led to a small hole, would this cause the ice to no longer be able to hold the cyborg up?
Any other scenarios that I'm missing?
Also where can I get relevant data like: surface area of different body parts, max pressure of different materials, formulas for calculating this stuff?