B30.13 applies to storage/retrieval (S/R) machines and associated equipment, such as aisle transfer cars and aisle equipment, and interfaces with other material handling equipment covered under other standards. The provisions of this Standard applying to S/R machines shall apply equally to the construction, installation, inspection, testing, maintenance, and operation of aisle trasfer cars and any load handling equipment which is part of or attached to S/R machines or aisle transfer cars.