locations shall be shown on the detail drawings.
3.1.6
Stack Support
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NOTE: Indicate wind force the stack design will
have to withstand. Structural design will also
include seismic resistanceas specified in
subparagraph Support Steel above.
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Stack support shall be in accordance with NFPA 211, as applicable.
Vertical and lateral supports for exterior chimneys shall withstand wind
forces of [130] [_____] km/hour [80] [_____] mph.
3.1.7
Catwalks and Access Platforms
All necessary platforms, ladders, handrails, and stairs needed for safe and
efficient operation and maintenance of the equipment shall be furnished and
installed. They may be relocated from the wall openings and passageways
shown in order to suit the boiler equipment provided. All railings shall
have 100 mm 4 inch wide toe-board located not more than 6 mm 1/4 inch above
the floor level. Construction shall conform as close as practical to items
indicated. Fabrication, materials, and coatings shall conform to Section
05120 STRUCTURAL STEEL.
3.1.8
Control System Installation
Equipment shall be installed in accordance with the manufacturer's
instructions and approved by the Contracting Officer. All control conduit,
wiring and/or tubing not specified elsewhere, but required to provide a
complete and operable system shall be furnished and installed under this
section of the specifications. This shall include material and items
required to arrange the system to compensate for the actual field
conditions encountered. Copper, stainless steel, or nonmetallic tubing may
be used as appropriate. Copper shall be ASTM B 88M ASTM B 88, Type K; with
flared cast brass or wrought copper fittings. Pneumatic tubing shall be
6.4 mm 1/4 inch OD with a minimum wall thickness of 0.762 mm 0.030 inch
unless otherwise indicated. Where 9.5 mm 3/8 inch or 12.7 mm 1/2 inch OD
tubing is used, the wall thickness shall be a minimum of 1.245 mm 0.049 inch.
The extent, general location, and arrangement of the system shall be as
indicated. Control panels shall be located as indicated and placed so that
operating personnel may effectively monitor boiler operations, but shall
not be in a position that would interfere with those operations.
Equipment, instruments, piping, wiring, and tubing shall fit into the space
allotted and allow adequate clearances for entry, servicing, and
maintenance. Locally mounted instruments shall be installed in such a
manner as to prevent interference with mechanical installations and to
ensure readability from the front aisles or operating area of the
equipment. Installation of the instrumentation system shall be carefully
coordinated with the work of other trades.
3.1.9
Field Tubing
Tube fittings shall be compression type and compatible with tubing material
(e.g., brass for copper tubing, stainless steel for stainless steel tubing,
and nonmetallic for nonmetallic tubing). Each connection shall be checked
for proper tightness and installation. All piping between primary
connections and instruments shall be a minimum of 9.5 mm 3/8 inch OD
SECTION 15846A
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