- Heat transfer at various design and ambient conditions
- Expansion profiles
- Shipping and erection stress analysis
f.
Finish: Stacks shall be shop coated prior to shipping from the
factory. After erection, touch-up damaged shop coated surfaces
and apply a prime coat and two coats of finish paint suitable for
the temperatures and environmental exposure as specified in
Section 09900 PAINTS AND COATINGS.
g.
Platforms and Ladders: Stacks shall be provided with platforms
for sampling tests, monitoring equipment maintenance and
obstruction-lighting maintenance. Access to lower platform shall
be by ASTM A 242/A 242M, Type 1, steel [stairway] [catwalk or
platform] [ladder] from the [heating plant] [pollution control
building] [ground level]. Design for a minimum live load on
platforms to be 488 kg 100 pounds per square meter foot.
Platforms shall be not less than 1220 mm 48 inches wide and the
sampling platform shall be a minimum width of 610 mm 2 feet plus
the stack diameter, but not more than 3 meters 10 feet in width.
Toe plates shall be not less than 150 mm 6 inches high around the
platform perimeter. Platform railings shall have two intermediate
railings. Ladders shall be [caged] corrosion resistant steel, 406
mm 16 inches wide with 305 mm 12 inch rung spacing. Ladders shall
be provided from the lower platform to the top of each stack and
shall be provided with a full length stainless steel safety climb
device. The climb device shall consist of a notched rail attached
to the rings' centerline with a sleeve which rides on the rail and
locks into position on a sudden downward pull. Two belts for
attaching the device to the climber shall be furnished.
h.
Anchor Bolts: Provide anchor bolts, nuts, washers and sleeves to
properly anchor the stacks. Stack manufacturer shall furnish
certified dimensional drawings showing location for setting bolts
in concrete.
i.
Miscellaneous:
(1) Sample Ports: Provide two sample ports at 90 degree
orientation to each other about 1220 mm 4 feet above platform.
Each sample port shall consist of a 100 mm 4 inch diameter pipe
welded to the steel jacket and provided with a flange and mating
blind flange. Provide openings required for installation of
opacity monitor and SO2 analyzer specified in VAMS Section 15901N
CONTROLS AND INSTRUMENTATION BOILER PLANT. [Locations of sample
ports and instrumentation openings shall be as detailed on
drawings].
(2) Obstruction Lighting: Provide an obstruction lighting system
for each heating plant stack, consisting of one red, flashing, 300
millimeter hazard beacon atop each stack, two steady burning, red
obstruction marker lights halfway up each stack, photoelectric and
flasher controls, weather-tight terminal boxes, cable, and conduit.
(a) Hazard Beacons: Federal Aviation Administration FAA AC
150/5345-43, Type L-866.
SECTION 15502N
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