Group 239 - Manufacture of non-metallic mineral products, n.e.c.
PSIC Group 239 covers Manufacture of non-metallic mineral products, n.e.c.. Direct children below it include Manufacture of refractory products, Manufacture of clay building materials, and Manufacture of other porcelain...
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Practical summary
Group 239 sits in the PSIC 2019 hierarchy under C Manufacturing > 23 Manufacture of other Non-metallic Mineral Products. This group usually narrows the choice to a small family of classes such as Manufacture of refractory products, Manufacture of clay building materials, and Manufacture of other porcelain and ceramic products. It is useful when two or three neighboring activities look similar but should not be collapsed into one code.
Official note
Source-backed description
This group includes the manufacture of intermediate and final products from mined or quarried non-metallic minerals, such as sand, gravel, stone or clay.