Editing USRA standard (section)

==Steam locomotive types==
The USRA developed designs for [[0-6-0]] and [[0-8-0]] [[switcher locomotive]]s, [[2-6-6-2]] and [[2-8-8-2]] [[Mallet locomotive]]s, and both light and heavy versions of the [[2-8-2]], [[2-10-2]], [[4-6-2]], and [[4-8-2]] types.  The light versions were designed with an [[axle load]] of 54,000&nbsp;lb (24,500&nbsp;kg) permitting usage on the vast majority of railroads, while the heavy versions were designed to a maximum axle load of 60,000&nbsp;lb (27,200&nbsp;kg) for lines with more heavily constructed track.

The U.S.R.A. also distributed [[Russian locomotive class Ye|2-10-0 Decapods of Russian design]] to railroads under its control.

===USRA 0-6-0===
255 of the [[USRA 0-6-0]] design were built, as well as many copies.

===USRA 0-8-0===
175 of the [[USRA 0-8-0]] design were built, and it was copied extensively thereafter.

===USRA Light 2-8-2 "Mikado"===
614 of the [[USRA Light Mikado]] type were constructed, making it the most populous USRA type.

===USRA Heavy 2-8-2 "Mikado"===
233 of the [[USRA Heavy Mikado]]s were built.

===USRA Light 2-10-2 "Santa Fe"===
94 [[USRA Light Santa Fe]] locomotives were constructed.

===USRA Heavy 2-10-2 "Santa Fe"===
175 [[USRA Heavy Santa Fe]] locomotives were built.

===USRA Light 4-6-2 "Pacific"===
106 [[USRA Light Pacific]]s were constructed.

===USRA Heavy 4-6-2 "Pacific"===
20 [[USRA Heavy Pacific]]s were built.

===USRA Light 4-8-2 "Mountain"===
47 of the [[USRA Light Mountain]] type were built.

===USRA Heavy 4-8-2 "Mountain"===
15 [[USRA Heavy Mountain]]s were constructed.

===2-6-6-2===
30 of the [[USRA 2-6-6-2]] type were built.

===2-8-8-2===
106 of the [[USRA 2-8-8-2]] locomotives were constructed.  The [[Norfolk and Western Railway]], in particular, continued building this type after the USRA period, developing and modernising it over time, as its Class Y.  A N&W Y6B was the last conventional freight-hauling steam locomotive built in the United States.