Table 31. Environment requirements (continued)Environment Recommended operating Allowable operating NonoperatingHumidity range 5.5°C (42°F) dew point(DP) to 60% relativehumidity (RH) and 15°C(59°F) dew point-12.0°C (10.4°F) DP and8% - 80% RH5% - 80% RHMaximum dew point 24°C (75°F) 27°C (80°F)Maximum operatingaltitude3050 m (10000 ft)Shipping temperature -40°C to 60°C (-40°F to140°F)Shipping relative humidity 5% - 100%1. Derate maximum allowable dry-bulb temperature 1°C per 175 m above 950 m.Table 32. Service clearances for rack-mounted expansion unitFront Back Sides914 mm (36 in.) 914 mm (36 in.) 914 mm (36 in.)Side and top clearances are optional during operation.Safety compliance: This hardware is designed and certified to meet the following safety standards: UL60950; CAN/CSA C22.2 No. 60950–00; EN 60950; IEC 60950 including all National Differences.Rack specificationsRack specifications provide detailed information for your rack, including dimensions, electrical, power,temperature, environment, and service clearances.For non-IBM rack specifications, see “Rack installation specifications for racks that are not purchasedfrom IBM” on page 70.Select your rack model to view its specifications.Related referenceRack installation specifications for racks that are not purchased from IBMLearn about the requirements and specifications for installing IBM systems into racks that were notpurchased from IBM.Planning for the 7014-T00 and 7014-T42 racksRack specifications provide detailed information for your rack, including dimensions, electrical, power,temperature, environment, and service clearances.Some products can have rack installation limitations. Refer to the specific server or product specificationsfor any restrictions.The following provide specifications for the 7014-T00 and 7014-T42 racks.22 Power Systems: Site and hardware planning