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brass

In India, 19ᵗʰ century, a unit used in construction to describe an amount of masonry; see the quotation. Such units are used to calculate payments to workers and contractors.

Masonry is calculated by the brass, which is 25 cubits in length by one in breadth and one in height. The cubits is use among masons in Bombay is 23 inches, (being 4 longer than the timber Guz) so that a brass of masonry contains, 115.74 cubic feet.

Robert Montgomery Martin.
History of the Colonies of the British Empire in the West Indies, South America, North America, Asia...
London: W. H. Allen & Co. and George Routledge, 1843.
Page 144 of Appendix 4.