What most naturally follows?

How to measure tongue weight
Ensure that the wheels of your trailer are securely blocked to prevent movement.
Cut a 5-to 6-foot (1.5 to 1.8 m)-long section of 2 by 4.
Lay a pipe across the bathroom scale.
Lay a second pipe across a brick. Set both of these 3 feet (0.91 m) apart.