Compliance submittals shall include general arrangement and outline
information, foundation design information, structural fabrication
information, and erection information. Unless otherwise specified, all
structural steel shall conform to ASTM A 36/A 36M, as designated in the
AISC 335, Part I. High-strength structural steel as listed in AISC may be
used if it conform to the appropriate ASTM specification and subject to
approval of the Contracting Officer. Structural steel includes columns,
beams, trusses, baseplates, girts, secondary bracings, purlins, girders and
hangers of structural steel. Miscellaneous steel includes steel other than
structural steel such as edge plates, handrails, stairs, grating, ladders,
and plate. Structural and miscellaneous steel shall be designed to resist
not less than the minimum loadings. Design, fabrication, and erection of
structural steel shall conform to the AISC 335 Manual of Steel
Construction. Structural components shall be designed for wind loads with a
minimum wind velocity of [_____] km/s mph. Design for seismic loads in
accordance with Section 15070N MECHANICAL SOUND VIBRATION AND SEISMIC
CONTROL. The entire structure along with components shall be designed in
accordance with earthquake regulations for structures located in Zone
[_____]. The site periods shall be between 0.8 and 1.2 seconds, whichever
results in the highest lateral force. The term "W" as used in the
calculations for seismic loading shall be interpreted as the normal
operating weight of the unit including dead loads. Platform live loads may
be excluded. The structural components shall be designed for a snow
loading of [_____] kg per square meter pounds per square foot. The
structural components shall be designed for dust loading of 98 kg per
square meter 20 pounds per square foot. The structural components shall be
designed for dust loading where appropriate based on 1600 kg per cubic meter
100 pounds per cubic foot minimum. Use a higher load where applicable.
Walkways, platforms, and stairs shall be designed for live loads of 488 kg
per square meter 100 pounds per square footplus concentrated equipment
loads. Stair live load shall be 610 kg per square meter 125 pounds per
square foot and shall be designed to carry the live load or a moving
concentrated load of 454 kg 1000 pounds, whichever is greater. Roof
purlins shall be spaced so that the metal roof deck span will not exceed
2.13 meters 7 foot. Design for a roof dead load of 98 kg per square meter
20 pounds per square foot and a live load of 148 kg per square meter 30
pounds per square foot.
2.13.1
Girts and Opening Frames
Provide girts for support of metal-wall panels with maximum spacing of 2.13
meters 7 foot center-to-center and supported on the outside face of the
columns. Girts shall have a girt line or outside edge distance of 560 mm 1
foot 10 inches from the supporting column centerline. Lowest girt on spray
dryer absorbers, fabric filter baghouses, and lime slurry preparation
system enclosure to be located abovegrade (Elevation [_____]) with support
at base of wall by Contractor. Provide closed ends or miter-cut girts at
corners. Provide structural subframing for doors and ventilators located
more than [_____] above grade. Contractor will provide doors, door frames,
and ventilators and will also provide necessary structural subframing from
these items up to [_____] above grade.
2.13.2
Slide Bearings
Provide structural slide bearings for spray dryer absorbers, ductwork, and
fabric filter baghouse to ensure correct alignment, prevent equipment
damage, ensure that stresses in the ductwork, fabric filter baghouse duct,
and supports are not excessive, and to allow efficient system operation at
conditions. Provide ductwork and fabric filter baghouse supports, except
SECTION 15864N
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