Skanska AB (2010)
Note 1 Consolidated accounting and valuation principles [extract]
IAS 16, “Property, Plant and Equipment” [extract]
Property, plant and equipment that consist of parts with different periods of service are treated as separate components of property, plant and equipment. Depreciation occurs on a straight-line basis during estimated useful life, or based on degree of use, taking into account any residual value at the end of the period. Office buildings are divided into foundation and frame, with a depreciation period of 50 years; installations, depreciation period 35 years; and non-weight-bearing parts, depreciation period 15 years. Generally speaking, industrial buildings are depreciated during a 20-year period without allocation into different parts. Stone crushing and asphalt plants as well as concrete mixing plants are depreciated over 10 to 25 years depending on their condition when acquired and without being divided into different parts. For other buildings and equipment, division into different components occurs only if major components with divergent useful lives can be identified. For other machinery and equipment, the depreciation period is normally between 5 and 10 years. Minor equipment is depreciated immediately. Gravel pits and stone quarries are depreciated as materials are removed. Land is not depreciated. Assessments of an asset’s residual value and period of service are performed annually.