 The track gauge was 4 ft 6 in (1,372 mm); the rails were of the cast iron fishbelly pattern 3 to 4 feet in length (914 to 1,219 mm).In contrast to later railways the rail spanned only a single space between stone sleeper blocks, being fastened in cast iron chairs.The "later" rails (after Hopkins' redesign) were 46.5 inches (1,181 mm) long with a 2.5 inch (63 mm) lap; the rail head was 1.75 inches (44 mm) wide with a web ¾ inch (19 mm) thick; the depth of the rails was 4 inches (102 mm) at the sleeper block and 6 inches (152 mm) at mid span.