Thirty 48  40 unit loads of a particular product are to be stored in storage racks. The warehouse manager cannot decide whether to store the product in single-deep or double-

deep storage racks. Seven tiers of storage are used; the storage aisle is 8 wide. A clearance of 4 is used between a load and the 4 upright truss, and a clearance of 4 side to side between loads. Two loads are stored side by side on a load beam. The flue space has a width of 9. Withdrawals occur at a uniform rate over the life cycle of the 30 loads.

a. Determine the expected amount of floor space required to store the product using single-deep storage rack.

b. Determine the expected amount of floor space required to store the product using double-deep storage rack.

c. Suppose a scissors-type reach attachment will allow three-deep storage in the storage rack. As with double-deep storage, two loads are stored side by side on a load beam. The same clearances apply. Based on assumptions similar to those used for double-deep storage, determine the expected amount of floor space required to store the product.