This standard BS EN 1529:2021 Door leaves. Height, width, thickness and squareness. Tolerance classes is classified in these ICS categories:
91.060.50 Doors and windows
This document gives the tolerance limits for specified dimensions of height, width and thickness, and for squareness of door leaves. It applies to door leaves which are supplied without, and independent of, any frames. It does not apply to the leaves of doorsets. NOTE Compliance with the tolerance limits given in this document does not imply that this would necessarily produce a perfect fit between door leaves and frames
