SPX Cooling Technologies 1200 Specifications, Specification Value, Convenience and Safety Options

Marley / Sigma 1000/1200 CoolingTower / Specifications: Options

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	Specifications	Specification Value
	Convenience and Safety Options
	Stairway:	■ Although they are not neces-
9.3		sary for routine operation and
	Replace paragraph 9.3 with the fol-	maintenance, stairways do
	lowing: A 30" wide, column supported,	provide a safe and comfort-
	45° stairway with 8" rise and run of	able means of access to the
	treated Douglas Fir shall be provided	top of the tower that is often
	at the tower endwall rising from grade	overlooked in the initial cool-
	(roof) to the fan deck elevation. Stair	ing tower purchase. They are
	columns shall be 4x4. Guardrails shall	designed in straight-run or
	be 2"x4". The upper guardrail shall have	double-back configurations
	an eased edge for the protection of	to accommodate your site
	operating personnel. Stairway founda-	requirements.
	tion shall be by others, designed in
	accordance with drawings provided by
	the cooling tower manufacturer. The
	stairway shall conform to OSHA stan-
	dards.
	Plenum Walkway:	■This option permits freedom of movement for inspection or main-
9.1		tenance within the tower without the need for wading boots or
	Add the following to the end of this	tower drainage. It also helps prevent maintenance personnel from
	paragraph: Provide a 30" wide walkway	damaging submerged accessories in the cold water basin (such
	extending from one endwall access door	as screens, probes, basin heaters, etc.).
	to the other through the length of the
	tower. Walkway shall be constructed of
	treated Douglas Fir, 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", the walkway
	shall be equipped with guardrails.
	Ladder Extension:	■ Many towers are installed such that the base of the tower is 2’-0”
9.4		or more above the roof or grade level. This makes it difficult to
	Add the following paragraph in the	get up to the base of the attached ladder. The ladder extension
	Access and Safety section: Provide	alleviates this problem. Marley ladder extensions are available in
	a ladder extension for connection to	standard 5’-0” and 11’-0” lengths, and will be field-cut to fit.
	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:	■To meet OSHA guidelines, towers whose
9.3		fan decks are 20'-0" or more above roof or
	Add the following to the end of this	grade, and which are equipped with lad-
	paragraph: A heavy gauge galvanized	ders, are required to have safety cages sur-
	steel safety cage shall surround the	rounding the ladders.
	ladder, extending from a point approxi-
	mately 7'-0" above the base of the
	ladder to the top of the guardrail sur-
	rounding the fan deck.