Basis of calculations for storage and retrieval machines – Tolerances, deformations and clearances in the storage system Part 1: General, Single deep and Double deep Beam Pallet racking (EN, DE – 2012) Posted 22nd February 2016 Basis of calculations for storage and retrieval machines – Tolerances, deformations and clearances in the storage system Part 1: General, Single deep and Double deep Beam Pallet racking (EN, DE – 2012)