Sourced US home improvement trade constants (board sizes, roll and bolt formats, panel modules, allowances) loaded by the calculators on calculiva.com, each with its source and verification date. CC BY 4.0.
Open data published by Calculiva (calculiva.com), home improvement calculators for US projects: the sourced trade constants the calculators load (board sizes, roll and bolt formats, panel modules, allowances), each with its source and verification date. CC BY 4.0.