USRA Designs

USRA Mikado Steam Engine

Menu

Home

 

 

 

The Freight Cars

 

As reported in the March 30, 1919 issue of Railway Review on March 27, 1919 the USRA design committee on freigh car standards released their specification for 3 box cars, 3 gondolas and 2 hoppers. Quoting from the article, the chief characteristics of each car was described as follows:

 

Box Cars:

Forty-tons capacity steel under-frame, double sheathed, with wood superstructure framing, steel ends and box-girder center sills.

 

Forty-tons capacity steel under-frame, single sheathed, with exterior pressed steel superstructure framing, steel ends and fish-belly center sills.

 

Fifty-tons capacity, steel under-frame, single sheathed, with exterior pressed steel superstructure framing, steel ends and fish-belly center sills.

 

Gondola Cars:

Fifty-tons capacity, composite, high side, flat bottom with fixed ends and eight flush drop doors hinged at the center and arranged to dump toward the side, the doors being operated in pairs from the corners of the car . The center sills are 12-inch by 35-pound channels, spaced 12inches back to back. The car is designed to carry a concentrated load of two-thirds its rated capacity over a distance of 10 feet at the center.

 

Fifty-tons capacity, all-steel, high-side, flat-bottom, with fixed ends and eight flush drop doors, the doors to be hinged crosswise of the car and operated in pairs from the sides of the car. The center sills are 12-inch by 35-pound channels spaced 12 inches back to back. The car is designed to carry a concentrated load of two-thirds its rated capacity over a distance of 10 feet at the center.

 

Seventy-tons capacity, all-steel low side, flat bottom with drop ends. Center sills are of the fish-belly type, 30 inches deep at the center . The car is designed to carry a concentrated load of two-thirds its rated capacity over a distance of 10 feet at the center.

 

Hopper Cars:

Fifty-five-tons capacity, all-steel, double hopper bottom having four doors hung crosswise of the car and operated in pairs. Center sills are 12-inch by 35-pound channels with facing flanges and are spaced 1:l-13/16 inches over backs.

 

Whether it was the rush to first publish or the specifications changed, the 40-ton double sheathed box car became one having a 50-ton capacity and the 50-ton single sheathed was dropped to 40-tons with wood superstructure framing.

 

 

USRA LightMikado

(Source: Railway Mechanical Engineer Vol 92 No 4)

 

 

Designed and built by the USRA:

 

Description

# Built

40' 50 ton steel frame single sheathed box cars

  • Specification #1001B
  • 5 Builders
  • Railroads
  • Contract price per car $3,050.05
25,000

40' 40 ton steel frame double sheathed box cars

  • Specification #1003-B
  • 9 Builders
  • Railroads
  • Contract price per car $2,918.88
25,000

50 ton composite gondolas with a drop bottom

  • Specification #1002-B
  • 5 Builders
  • 27 Railroads
  • Contract price per car $2.698.20
20,000

55 ton twin steel hopper

  • Specification #1005-B
  • 6 Builders
  • 23 Railroads
  • Contract price per car $2,816.67
25,000

70 ton low side gondola (with wood floor)

  • Specification #1006
  • 2 Builders
  • 9 Railroads (initial allocation)
  • Contract price per car $3,173.89

5,000

Total

 

100,000

 

 

 

Designed but not built by USRA:

 

 

August 31, 2015