of the bags to the caps and thimbles. Provide an adjustable suspension
system without using nuts and bolts to attach the upper portion of the
bags. Cadmium plate bag caps and suspension hardware which come into
contact with the bag fabric. Provide ten percent of total bags as spare
bags. Stitch bags using [_____] thread. Provide fluorescent powder for
one year of normal inspections and provide a portable ultraviolet light to
leak test the bags.
][2.2.2
Bags and Hardware, Pulse Jet Cleaning System
Provide glass fiber bags, 4874 gram per sq m 16 oz per sq ft, 3 by 1 twill
weave, as specified in paragraph entitled "Design Criteria." Coat bags
with 100 percent Teflon B lubricant for 10 percent add on weight. Provide
the manufacturer's standard cage design including venturis, provided it has
a reliable service record with the bags proposed. Attach bags and cages to
the tub sheet to provide proper air seal, bag tension, and cage alignment.
Clamp bags at top between the cage and tube sheet so that the bags may be
readily removed without special tools yet not sway.
]2.3
STRUCTURAL SUPPORTS
Provide structural and miscellaneous steel to frame and support the
baghouse, ductwork, weather enclosure, component parts, and equipment.
Structural steel includes columns, beams, trusses, baseplates, girts,
bracing, purlins, girders, and hangers. Miscellaneous steel includes edge
plates, handrails, stairs, grating, and ladders. Provide steel supports
for paragraph entitled "Access Provisions." Provide concrete foundations,
anchor bolts, and grouting. Allow 50 mm 2 inches for grout so that bottom
of baseplates are at an elevation of [_____] meters feet. Design
structural steel support of baghouse to withstand differential thermal
expansion and to support its own dead weight plus insulation, the maximum
weight of accumulated flyash, and the maximum loads as specified in
paragraph entitled "Design Criteria," or 4.8 kPa 100 psf, whichever is
greater. Design to support equipment from the top of concrete foundations
set an elevation of [[_____] metersfeet] [150 mm6 inches above grade].
Platform live loads may be excluded. Design for a roof dead load of one kPa
20 psf and a live load of 1.50 kPa 30 psf. Design for seismic loads using
Section 15070N MECHANICAL SOUND VIBRATION AND SEISMIC CONTROL, and
earthquake regulations. Use site periods between [[_____] and [_____]]
[0.8 and 1.2] seconds for Zone [_____] structures, whichever results in the
highest lateral force. Use the normal operating weight of the unit
including dead loads as "W."
2.3.1
Girts and Opening Frames
Provide doors, door frames, and ventilators. Provide structural subframing
for doors and ventilators located above grade [_____] meters feet. Provide
girts to support outside face of metal wall panel, spaced at maximum 2.10
meters 7 feet center-to-center. Locate lowest girt above grade [[_____]
meters feet] with support at the wall base. Design girt line or outside
edge distance from the supporting column centerline for 0.56 meter one foot
10 inches. Provide closed ends or miter cut girts at corners.
2.3.2
Slide Bearings
Provide structural slide bearings using fluoroplastic self-lubricating
bearing elements to ensure correct alignment and to prevent equipment
damage and stress. Use slide bars to prevent ash and dirt from
accumulating on the bearings.
SECTION 15863N
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