SPX Cooling Technologies FSIG-TS-08A Specifications, Specification Value, Plenum Walkway

Marley / Sigma F Series CoolingTower / Specifications: Options 22

Specifications

Plenum Walkway:

9.1Add the following to the end of this paragraph: Provide a 30" (762 mm) minimum wide walkway extending from one endwall access door to the other through the length of the tower. Walkway shall be constructed of fiberglass components with a nonskid surface on floor members, and the top of the walkway shall be above the cold water basin overflow level. If the cold water basin is deeper than 4'-0" (1.22 m), the walkway shall be equipped with fiberglass guardrails.

Ladder Extension:

9.4Add the following paragraph in the Access and Safety section: Provide a ladder extension for connection to the base of the ladder attached to the tower casing. This extension shall be long enough to rise from the roof (grade) level to the base of the tower. Anchorage and lateral bracing of the ladder extension shall be by others.

Ladder Safety Cage:

9.3Add the following to the end of this paragraph: A heavy gauge galvanized steel safety cage shall surround the ladder, extending from a point approxi- mately 7'-0" (2.13 m) above the base of the ladder to the top of the guardrail surrounding the fan deck.

Hot Water Basin Covers:

7.4Add the following paragraph in the Hot Water Distribution System section: The distribution basins shall include stainless steel covers. These covers shall be designed to withstand 40 psf (1.92 kPa) live load, and shall be easily removable for maintenance.

Specification Value

■This option permits freedom of movement for inspection or main- tenance within the tower without the need for wading boots or tower drainage. It also helps prevent maintenance personnel from damaging submerged accessories in the cold water basin (such as sump screens, probes, basin heaters, etc.).

The need for guardrails where basins are deeper than 4’-0” (1.22

m)is an OSHA requirement.

■Many towers are installed such that the base of the tower is 2’-0” (610 mm) or more above the roof or grade level. This makes it difficult to get up to the base of the attached ladder. The ladder extension alleviates this problem. Marley's ladder extensions are available in standard 5’-0” (1.52 m) and 11’-0” (3.35 m) lengths, and will be field-cut to fit.

■To meet OSHA standards, towers whose fan decks are 20’-0”

(6.10 m) or more above roof or grade, and which are equipped with ladders, are required to have safety cages surrounding the ladders. Their use on lower elevation towers is a matter of choice.

■These covers are designed to keep leaves and debris out of the circulating water system. They also serve to suppress algae for- mation by shielding the incoming hot water from direct sunlight.