BS EN ISO 6284:1999 pdf free.Construction drawings - Indication of limit deviations. BS EN ISO 6284 specifies methods for the indication of limit deviations on construction drawings. ISO 286-1:1988, ISO system of limits and fits — Part 1: Bases of tolerances, deviations and fits. ISO 1803:—, Building construction — Expression of dimensional accuracy — Vocabulary1 ISO 4068:1978, Building and civil...