Radius

[nachoman]

Should have said for a train table lol my bad

Convert inches to feet (divide by twelve), and you get 1.83 and 2. Since they are radii and you want to know the diameter of a half circle, multiply by two, and you get 3.67 and 4 feet, respectively. A 24" circle of track would need to be on a table more than 4 feet wide. 22" was chosen as a standard sectional track radius because it is the largest curve one can make and fit it on a 4x8 sheet of plywood.