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Table 3-7 Minimum Useful Life <br />Project Type <br />Useful Life <br />a. <br />All construction projects (unless listed separately below) <br />20 years <br />b. <br />All equipment and vehicles (unless listed separately below) <br />10 years <br />c. <br />�_._.. _._....rs <br />Pavement rehabilitation (not reconstruction, which is 20 years) � <br />1..._0 yeearsa <br />d. <br />Asphalt seal coat, slurry seal, and joint sealing <br />3 years <br />e. <br />Concrete joint replacement7 <br />years <br />f. <br />Airfield lighting and signage <br />10 years <br />g. <br />ARFF vehicles <br />15 years <br />h. <br />ARFF structural gear (firefighting suits), which has less heat insulation than <br />7 years <br />proximity gear (per the National Fire Protection Association 1971 Standard on <br />Protective Ensembles for Structural Firefighting and Proximity Firefighting) <br />i. <br />ARFF proximity gear (firefighting suits), which is also referred to as slicks, <br />5 years <br />bunker, or turn out gear (per the National Fire Protection Association 1971 <br />Standard on Protective Ensembles for Structural Firefighting and Proximity <br />Firefighting) <br />J. <br />NAVAIDs and Weather Reporting Equipment <br />15 years <br />k. <br />Buildings <br />40 years <br />I. <br />Land _... <br />Unlimited <br />m. Loading Bridges <br />20 years <br />n. <br />Fencing <br />20 years <br />Page 43 of 43 <br />