Position steel rebar stakes 12 inches from the base of the carport, with one stake at each of the carport's upright supports. Drive the rebar stakes into the ground at a 45-degree angle from the ground with a sledgehammer until only 6 inches of each bar is above ground.
Tie one end of nylon rope or connect a chain to the top of the carport upright where it meets the carport roof. The roof and upright are connected with bolts. Wrapping the nylon rope or around the junction provides optimal strength.
Attach the other end of the nylon rope or chain to one rebar stake driven into the ground, ensuring that they are connected as tightly as possible. When they are connected, drive the stake farther into the ground until it is within 3 inches of ground level. Do this for each of the rebar stakes and uprights to anchor the carport.