plus concentrated equipment loads. Design walkways which are above
ductwork or other surfaces, so that the underside of the walkway is a
minimum of 150 mm 6 inches above the upper surface of the ductwork
including insulation and lagging. Provide 40 mm 1 1/2 inch diameter black
standard weight pipe, ASTM A 53, Type E or Type S handrails. Pipe runs
shall be horizontal at 584 mm and 1.07 m 1 foot 11 inches and 3 feet 6
inches above walk grating.
2.9.3.4
Platforms
Provide minimum 1.11 sq meters 12 sq feet platforms. Design platforms for
live loads of 488 kg/m2 100 psf plus concentrated equipment loads. Design
platforms which are above ductwork or other surfaces, so that the underside
of the platform is a minimum of 150 mm 6 inches above the upper surface of
the ductwork including insulation and lagging. Provide minimum 6 mm 1/4
inch thick raised steel floor plate grating of one piece, resistance-welded
with 5 mm 3/16 inch diameter main bars, ASTM A 108, Grade 1015, spaced at
no more than 30 mm 1 3/16 inches on corners. Use serrate main bars for
outdoor use. Provide subframing so grating span is no greater than 1.07 m
3 feet 6 inches. Space crossbars, ASTM A 108, Grade 1010, at 102 mm 4
inches on centers. Crossbars shall be hexagonal of 8 mm 5/16 inch diameter
of inscribed circle, 13 by 5 mm 1/2 by 3/16 inch rectangular, 6 mm 1/4 inch
square with spiral twist, or 8.33 mm 21/64 inch diameter round. Provide 40
mm 1 1/2 inch diameter black standard weight pipe, ASTM A 53, Type E or
Type S handrails and 6 mm 1/4 inch thick steel kickplates. Pipe runs shall
be horizontal at 584 mm 1 feet 11 inches and 1.07 m 3 feet 6 inches above
grating.
2.10
SOURCE QUALITY CONTROL
Conduct standard factory tests and performance tests required by the
applicable codes on control circuits, mechanical draft equipment and
materials, and dampers, except poppet dampers. Notify Contracting Officer
of test dates in writing not less than 45 days before factory tests so that
Contracting Officer may witness test.
2.10.1
Baghouse Controls Tests
connected together. To test, provide control boards with 115 VAC, 60 Hz,
and operate each control switch and selector switch to verify that each
remote contacts and switches with jumpers at the appropriate external
terminal blocks to verify proper circuit operation. Test annunciator
systems to verify that annunciator points operate correctly by jumpering or
operating alarm initiating device or jumpering external terminals for
remote alarm inputs.
2.10.2
Factory tests shall include mechanical balancing of rotary parts.
2.10.3
Dampers
Test each damper following AMCA 500-D, including frame, except poppet
dampers, five times in an airtight chamber at design flowrate temperature
and pressure to determine gas leakage across the damper and the frame.
Provide instruments to determine the amount of leakage and the static
pressure against the damper. If a damper is equipped with a seal air
SECTION 15863N
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