BS ISO 81346-12:2018

This document establishes rules for structuring of systems and the formulation of reference designations and provides classes for systems in the field of construction works and building services. This document also specifies a classification of objects and corresponding letter codes for use in reference designations of object occurences.

This document is not intended for manufacturers or system-related designations of individuals (e.g. inventory number or serial number) or for product types (e.g. article number or parts number).

We offer customers a wide range of delivery options from Free (7-10 working days) ... right up to by Next Day by 9am (subject to location and stock availability).

• Simply choose your preferred service when checking out
• We show "live" stock levels for all publications
• Orders received after 3:45pm will be processed on the next working day.
• Unless specifically requested, our delivery partners will not attempt a weekend delivery

We offer all customers a "No Quibble" 28 day returns policy.

If you need to return a title for any reason ...

• Contact our customer services team first to explain what you are returning and the reason
• Request a Returns Authorisation Number
• We will email you this and a link to arrange your return quickly & easily via Royal Mail
• Take your return to your nearest Post Office and they will do the rest

Please refer to our Returns page for full details & charges.