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WheelArrangement 2-4-2+2-4-2.svg

In the Whyte notation for the classification of steam locomotives by wheel arrangement, the 2-4-2+2-4-2 is a Garratt articulated locomotive. The wheel arrangement is effectively two 2-4-2 locomotives operating back to back, with the boiler and cab suspended between the two power units. Each power unit has a single pair of leading wheels in a leading truck, followed by two coupled pairs of driving wheels, with a single pair of trailing wheels in a trailing truck. Since the 2-4-2 type is sometimes known as a Columbia, the corresponding Garratt type could be referred to as a Double Columbia.

Other equivalent classifications are:


This was the rarest of all Garratt types, with only four constructed to this wheel arrangement. All of them were built in 1943 by Beyer, Peacock for the 1,000 mm (3 ft 3 38 in) metre gauge Leopoldina Railway in Brazil. They were allocated engine numbers 400 to 403 on that system.[1]

2-4-2+2-4-2 Garratt production list – All manufacturers[1]
Gauge Railway Numbers Works no. Units Year Builder
1,000 mm Leopoldina Railway, Brazil 400-403 6976-6979 4 1943 Beyer, Peacock


  1. ^ a b Hamilton, Gavin N., The Garratt Locomotive - Garratt Locomotives produced by Beyer, Peacock, retrieved 10 November 2012