My friend, if you want to steam crabs in a pot with cold water, it will take 20 minutes to fill the pot, but it will take 18 to 20 minutes to steam them out. But personally, I suggest that when the water in the pot is steaming, it is best to put the crabs in, so that the steamed crabs will not lose a paw, and it will take 17 minutes. Crab meat is tender and delicious. I hope everyone can adopt it.