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MC
Marley
Specifications
Convenience and Safety Options
Top Access Platform:
11.2
Add the following paragraph in
the Access section: There shall be
an access platform at the top of the
fluid cooler to allow access to the drift
eliminators and distribution system.
The platform shall be free-standing
galvanized steel bar grating, sup-
ported by galvanized steel framework.
The platform shall be surrounded by
a handrail, kneerail, and toeboard
designed according to meet local
safety requirements. Handrails and
kneerails shall consist of 42mm O.D. x
15 gauge galvanized structural tubing,
the handrail of which shall be capable
of withstanding a 890 N concentrated
live load in any direction. Posts are
51mm x 51mm square structural tub-
ing and shall be spaced on centers of
2.44m or less. A ladder shall be per-
manently attached to the platform and
to the casing of the fluid cooler, rising
from the base of the fluid cooler to the
top of the handrail.
Ladder Extension:
11.2
Add the following to the end of
paragraph 11.2: Provide a ladder
extension for connection to the foot
of the ladder. This extension shall
be long enough to rise from the roof
(grade) level to the base of the fluid
cooler. The installing contractor shall
be responsible for cutting the ladder to
length; attaching it to the foot of the
fluid cooler ladder; and anchoring it at
its base.
Ladder Safety Cage:
11.3
Add the following paragraph in the
Access section: A heavy gauge galva-
nized steel safety cage shall surround
the ladder, extending from a point
approximately 2150mm above the foot
of the ladder to the top of the handrail.
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Specifications: Options
Fluid Cooler
Specification Value
Periodic inspection and maintenance of a fluid cooler distribution
■
system is fundamental to preserving maximum cooling system effi-
ciency. All fluid coolers—crossflow or counterflow—are subject to
clogging to varying degrees by waterborne contaminants such as
pipe scale and sediment. Therefore, safe and easy access to these
components is of significant value to the operator.
Access can be provided in a number of ways, including portable
ladders or scaffolding, but for maximum safety and convenience, a
field installed Marley access platform with guardrails is available to
make this task as safe and user-friendly as possible. Further, its loca-
tion on the side of the fluid cooler does not add to the height of the
unit, preserving architectural integrity. It also saves the owner time
and money, in that maintenance personnel may devote their time to
inspection rather than searching for ladders or erection of portable
scaffolding.
Many fluid coolers are installed such that the base of the unit is
■
600mm or more above the roof or grade level. This makes it difficult
to get up to the foot of the attached ladder. The ladder extension alle-
viates this problem. Marley ladder extensions are available in stan-
dard 1524mm and 3353mm lengths.
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