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segelnhoch3 t1_je296t6 wrote on March 28, 2023 at 9:50 PM

Reply to comment by mikeholczer in ELI5: How is a high level of precision maintained during the construction of a building to make sure its built square, level all around? by phenols

To add onto this: there are tools that project perfectly vertical or horizontal lines with lasers, which you can then use to build your wall/floor/...