###You should use the rules for Dragging.
You should use the rules for Dragging.
As per the PHB p176:
Push, Drag, or Lift.
###Push, Drag, or Lift. YouYou 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. ###Carrying Capacity. Your
Carrying Capacity.
Your carrying capacity is your Strength score multiplied by 15.
emphasis added to the word weight to show that you can drag creatures (who are not resisting) or objects
A character with a 16 Strength, could drag another creature or object that weighed 240 lbs (including equipment) without being slowed or up to 480 lbs and slowed to a speed of 5 feet. This is also adjusted by the size of the dragging character (not the load).