Resources: Fixed dimensions

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Fixed dimension tables

So you have just found a photograph of an asset that is a must have for your route. But the problem is, that there are no dimensions to start with. However, as it happens, at least in some times, places, and applications, that certain dimensions are common enough that they are almost standard. These dimensions can be used as a starting point to at least make reasonable estimates of other dimensions.

Rail and Trackside Assets

Category Locale Era Description of dimension value and units of dimension comment
Railroad North America 1886 to Present Standard gauge railroad track 4' 8.5" / 1435 mm
Railroad UK 1846 to Present Standard gauge railroad track 4' 8.5" / 1435
Railroad North America Coupler horizontal center line - loaded car 33 to 34 inches / 838 to 864 mm
Railroad North America Coupler horizontal center line - empty car 34 to 35 inches / 864 to 889 mm
Railroad North America Wheel diameter - up to 70 ton car 33 inches / 838 mm
Railroad North America Wheel diameter - 70 to 119 ton car 36 inches / 908 mm
Railroad North America Wheel diameter - auto rack and intermodal cars 28 inches / 711 mm
Railroad North America Floor & deck height from top of rail 40 inches / 1016 mm
Railroad Australia Floor & deck height from top of rail 48 inches / 1219 mm
Railroad Australia to 1880 Rail wheel thickness 5 inches / 127 mm
Railroad Australia 1880 to date Rail wheel thickness 5-1/2 inches / 139.7 mm

Architectural elements

Category Locale Era Description of dimension value and units of dimension comment
Residence North America Door height 6 feet 8 inches / 2032 mm
Residence North America Doorknob height 36 inches / 934.4 mm
Industrial North America Rail loading dock height (from top of rail) 40 inches / 1016 mm
Industiral Australia Rail loading dock height (from top of rail) 48 inches / 1219 mm
Residence and commercial United States Stairway riser (from top of one tread to top of next) 7 inches / 177.8 mm

Vehicles

Category Locale Era Description of dimension value and units of dimension comment
International intermodal container World wide container height 8 feet / 235.0 cm
International intermodal container World wide short container length 20 feet / 590.6 cm
International intermodal container World wide long container length 40 feet / 1181.2 cm
Semi trailer North America trailer length 40 feet / 1181.2 cm
Semi trailer North America trailer length 48 feet / 1463 cm
Semi trailer North America trailer length 53 feet / 1615.44 cm
Intermodal container North America trailer length 40 feet / 1181.2 cm
Intermodal container North America trailer length 48 feet / 1463 cm
Intermodal container North America trailer length 53 feet / 1615.44 cm

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