Manhole

The manhole was a German volume measure for building materials such as sand , gravel and stones and also a measure for excavation during construction and earthworks. Manhole rod was also referred to as a manhole structure and synonymous with the old unit of the volume of manhole material. The dimension was considered to be the shaft dimension and was based on the locally valid foot measurements calculated for each length rod. The rod could hold from 12 to 16 feet . The shaft foot or shoe or shaft inch was used for the width and height. It was very different from region to region and was an example for Prussia .

• 1 shaft rod (Prussian) = 1 rod long and wide; 1 foot high = 144 cubic feet = 4.4519 cubic meters
• Example 1 manhole rod = 1 square rod times 1 foot ≈ 4.5 to 6.5 cubic meters

If the length rod has 12 feet, the cubic rod contains 12 manhole rods and the manhole rod contains 144 cubic feet

The decimal dimension (tenth part) or the duodecimal dimension ( twelfth part) of the calculated foot must always be observed .

See also

• Wall rod
• Manhole
• Old weights and measures (Hanover)
• Old weights and measures (Braunschweig)
• Old weights and measures (Prussia)
• Anglo-American system of measurement

literature

• Author collective: Meyers Konversationslexikon. Volume 14, Verlag des Bibliographisches Institut, Leipzig / Vienna 1885–1892, p. 371.
• Author collective: Brockhaus' Konversationslexikon. Volume 14, FA Brockhaus, Leipzig / Berlin / Vienna 1894–1896, p. 364.