mild steel plate and flanged discharge throat built of not less than 5 mm
3/16 inch commercial hot rolled mild steel plate. Design head section to
support the drive machinery and head bearings. Provide access ladder and
service platform conforming to applicable OSHA regulations as indicated for
providing proper service and maintenance of elevator.
2.12.6.7
Boot Section
Construct of not less than 5 mm 3/16 inch commercial hot rolled mild steel
plate in heavy angle frame with curved and renewable bottom plate and
renewable internal loading leg, both built of not less than 5 mm 3/16 inch
commercial hot rolled mild steel plate, and flanged inlet. Mount take-up
and foot terminal bearing on one side of boot in a bolted removable side
panel so foot shaft and sprocket may be removed through side of the door.
Bolt end panels so they are removable for cleanout and inspection.
2.12.6.8
Electric Motor
Totally enclosed, fan cooled, high torque, [_____] volt, three phase, 60
Hz, not less than [_____] kW hp as specified in paragraph entitled "Motors
and Drives," direct connected by means of flexible coupling to a reduction
gear unit having alloy steel herringbone or helical gears and antifriction
bearings enclosed in oiltight housing. Provide an adjustable base for
motor and reduction gear unit. Drive, from the output speed shaft of the
reduction gear to the elevator head shaft, shall be by means of finished
steel roller chain running over cut tooth sprockets, complete with steel
plate chain guard. Roller chain, sprockets, and roller chain attachments
shall conform to ASME B29.1M.
2.12.6.9
Anchoring Brackets
Provide steel brackets as indicated at intervals for anchoring elevator to
increase rigidity.
2.12.6.10
Discharge Chute
Construct of not less than 10 mm 3/8 inch thick steel plate and attach to
ash silo.
2.12.7
Ash Storage Silo
**************************************************************************
NOTE: Use enclosures for silo roof and unloader
level in climates where protection of equipment and
personnel from the weather is desired.
**************************************************************************
[_____] meters feet in diameter with [_____] meters feethigh walls with a
live bottom and flyash storage capacity of not less than [_____] Mg tons,
based on ash bulk density of 640 kg per cubic meter 40 pounds per cubic foot
for volumetric sizing. Structural joints shall be dusttight and
watertight. Provide columns, beams, bracing, and other structural members
as required for complete erection of silo and accessories. Live storage
capacity shall allow for 20 degree angle of repose from silo outlet.
Height of silo storage shall not be more than twice the diameter. Provide
a minimum of one meter 3 feet of freeboard above the ash level. Provide
support steel design approved by the ash system supplier. Design silo in
accordance with ICBO UBC. Design shall take into account seismic load,
wind load, snow load, equipment loads and an ash bulk density of 1120 kg
SECTION 15501N
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