What size are the ties (sleepers) in 15″ gauge railways?
Carl: As far as prototype 15″ gauge lines are concerned, Sir Arthur Heywood decreed in 1877 that sleepers (ties) for 15″ gauge railways should be 6½” wide x 2½” thick x 36″ long, laid at 18″ intervals for 12 pound rail, 27″ intervals for 16 pound rail, and 36″ intervals for 22 pound rail. And so it was. He used cast iron sleepers of those dimensions at both Duffield Bank and Eaton Hall.