4-8-2+2-8-4

First known tank engine version
First known tank engine version
First use	1926
Country	Kenya & Uganda
Locomotive	KUR EC class
Railway	Kenya-Uganda Railway
Designer	Beyer, Peacock and Company
Builder	Beyer, Peacock and Company

Equivalent classifications
Equivalent classifications
UIC class	2D1+1D2
French class	241+142
Turkish class	47+47
Swiss class	4/7+4/7, 8/14 from the 1920s
Russian class	2-4-1+1-4-2

4-8-2+2-8-4 (Double Mountain)
	KUR EC class, the first Double Mountain Garratt, 1926
UIC class
Equivalent classifications
UIC class	2D1+1D2
French class	241+142
Turkish class	47+47
Swiss class	4/7+4/7, 8/14 from the 1920s
Russian class	2-4-1+1-4-2
First use
First known tank engine version
First use	1926
Country	Kenya & Uganda
Locomotive	KUR EC class
Railway	Kenya-Uganda Railway
Designer	Beyer, Peacock and Company
Builder	Beyer, Peacock and Company
First use
First known tender engine version
First use	1938
Country	South Africa
Locomotive	SAR Class GM
Railway	South African Railways
Designer	W.A.J. Day
Builder	Beyer, Peacock & Company
Evolved from	2-8-2+2-8-2

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, a 4-8-2+2-8-4 is a Garratt articulated locomotive consisting of a pair of 4-8-2 engine units back to back, with the boiler and cab suspended between them. The 4-8-2 wheel arrangement has four leading wheels on two axles, usually in a leading bogie, eight powered and coupled driving wheels on four axles and two trailing wheels on one axle, usually in a trailing truck. Since the 4-8-2 type is generally known as a Mountain, the corresponding Garratt type is usually known as a Double Mountain.