Are technical drawings bearing a title block listing designers and the project manager personal data?

ANSWER

Personal data are information relating to an identified or identifiable natural person (Article 4(1) GDPR). Information about the designer and project manager as natural persons will therefore constitute personal data, as they allow a natural person to be identified. The technical drawing itself is not personal data. The concept of personal data relates to natural persons. If any document, letter, map or technical drawing contains information about an identifiable natural person, processing of that person's personal data will be involved.