Tangible assets of the following types in which a contractor has an interest through ownership or leasing are subject to depreciation:

     (1) Building - the basic structure or shell and additions thereto;

     (2) Building fixed equipment - attachments to buildings, including, but not limited to, wiring, electrical fixtures, plumbing, elevators, heating system, and air conditioning system. The general characteristics of this equipment are:

     (a) Affixed to the building and not subject to transfer; and

     (b) A fairly long life, but shorter than the life of the building to which affixed;

     (3) Major movable equipment including, but not limited to, beds, wheelchairs, desks, and X-ray machines. The general characteristics of this equipment are:

     (a) A relatively fixed location in the building;

     (b) Capable of being moved as distinguished from building equipment;

     (c) A unit cost sufficient to justify ledger control;

     (d) Sufficient size and identity to make control feasible by means of identification tags; and

     (e) A minimum life greater than one year;

     (4) Minor equipment including, but not limited to, waste baskets, bed pans, syringes, catheters, silverware, mops, and buckets which are properly capitalized. No depreciation shall be taken on items which are not properly capitalized as directed in RCW 74.46.310. The general characteristics of minor equipment are:

     (a) In general, no fixed location and subject to use by various departments;

     (b) Small in size and unit cost;

     (c) Subject to inventory control;

     (d) Large number in use; and

     (e) Generally, a useful life of one to three years;

     (5) Land improvements including, but not limited to, paving, tunnels, underpasses, on-site sewer and water lines, parking lots, shrubbery, fences, and walls where replacement is the responsibility of the contractor; and

     (6) Leasehold improvements - betterments and additions made by the lessee to the leased property, which become the property of the lessor after the expiration of the lease.

[1980 c 177 § 33.]