GENERAL ELECTRIC GENERATING PLANTS Part 10 pps

MIL-HDBK-1003/11

15.4.3 Platforms and Ladders. Provide platforms with ladders at

alllocations requiring access for operation, maintenance, and cleaning for

systems that are more than 4 feet (1.2 meters) above the ground floor.

Connect long platforms to two means of egress or ladders.

15.4.3.1 Ladders. Systems and access doors need only ladders for

inspection.

15.4.3.2 Platforms. Toe guards and railings shall be provided on

platforms.

15.4.4 Cranes and Hoists. See NAVFAC DM-38.01, Weight-Handling Equipment

and Service Craft; for types and design criteria and also Section 5.

15.5 Typhoon and Seismic Considerations. Interior and exterior mechanical

equipment and systems should be anchored, braced, or guyed (as required) to

withstand the wind loads (pressures) and seismic zone lateral accelerations

specified for design of structures. Seismic design shall comply with

criteria and requirements indicated in NAVFAC P-355, Seismic Design for

Buildings.

15.5.1 Piping and Raceway Systems. All systems should be designed to

permit freedom of movement of the pipes or raceways caused by expansion and

contraction but shall contain their lateral movement due to seismic

occurrences. Penetration through building walls and floors should be made

through sleeves, and with swing joints or other means of permitting

independent pipe or raceway movements. All piping or raceways critical to

the operation of the plant should be steel or other structurally strong

materials, if possible, in lieu of brittle materials, such as plastic or

cast iron. Materials containing asbestos shall not be used.

15.5.2 Equipment. All mechanical and electrical equipment and tanks should

be securely anchored to their foundations. Supports for equipment should be

steel in lieu of cast iron where practicable.

15.5.3 Controls. Control systems should be designed so that loss of the

control media (air, hydraulic, or electric) will leave the control in a

fail-safe position, capable of being operated manually.

15.6 Heating, Ventilating, and Air Conditioning. Refer to NAVFAC DM-3.03,

and Department of Defense (DOD) 4270.1M, Construction Criteria Manual, for

criteria.

15.6.1 Heating Diesel-Electric Generating Plant Buildings. Buildings for

prime duty and standby/emergency duty diesel-electric generating plants

should be heated and ventilated. Refer to NAVFAC DM-3.03, Heating,

Ventilating, Air Conditioning, and Dehumidifying Systems for criteria.

Heating and ventilating systems for control rooms, switchgear rooms,

offices, and critical parts storage should be provided with a system

separate from the main engine-generator and auxiliary room system.

15.6.1.1 Exhaust Gas Heat Recovery. Prime duty generating plant building

and process heat should be provided by exhaust gas heat recovery boilers

where economically feasible. Where the heat recovery boilers do not provide

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