Dumpster Gang how to carry heavy loot comes down to one rule: carry one heavy item at a time and eat before you pick it up, because heavy loot slows you down and drains the stamina you need to sprint and climb, and the demo shows no weight or stamina numbers to plan around.
Dumpster Gang how to carry heavy loot: one piece at a time
Heavy objects are carried one at a time and they slow you down. The biggest items, televisions in particular, pull the camera in tight against the raccoon so the burden is visible, and the camera can even end up inside the character at some angles.
You carry one thing at a time, full stop. That is not a preference; it is how the carry works, and it is why a haul of furniture takes several trips rather than one.
Stamina is the real limit
Carrying drains stamina, and stamina is what lets you sprint and climb for longer. That is why eating food matters before a long haul rather than after you get tired.
The demo shows no numeric weight or stamina readout, so there is nothing to calculate from. The practical rule is the whole answer: take one heavy piece at a time, and eat before you carry it.
Carrying heavy loot is a co-op answer
The developers describe working together to carry heavy loot as the co-op answer, so a group shares the burden instead of one raccoon trudging back alone with a television. That is also why the biggest items are worth a second pair of hands rather than a solo sprint.
If you have nobody to call, the party and invites guide covers how the lobby works and who you can bring in.
When the hideout is full
Whatever you bring home goes into the burrow, and groups that steal more than the hideout can hold have reported that some of the deposited items, hats included, do not make it back. The camp items guide covers how the stash works and how to clear it safely.