BD) THE CITY OF NASHUA The Gate Cty
Adsninistrative Services
Pyechasing Dapartrannt
Addendum 1
IFB.1093-122920
Project Description
The following project description was erroneously omitted from the original bidding documents.
Project Description
Dry Well Hoist Replacement
IFB1093-121620
Contractor shall furnish and install one 3-ton hoist that can traverse laterally and longitudinally
along the existing rail track in the dry well of the headworks of the main control building. The
existing hoist is a Yale 3-ton model 651CL (serial number AR-203058) with a Louden motor
model 3AL (serial no. L17111T7) for traverse bridging across the dry well. The existing hoist shall
be replaced with the same unit or equal, but with the added capability to traverse longitudinally.
The contractor shall determine how to install a track and motor to provide motorized traverse
movement of the hoist. Add Alternate- 1 work (to provide laser system to stop hoist from
reaching electrical panels) to be included in final contract if awarded.
Payment for this project will be lump sum, with partial payments made in accordance with a
schedule of values to be submitted with the bid. There is one bid alternate for a laser detection
or equivalent system to prevent the hoist apparatus (with or without a load attached) from
impacting electric conduits and panels installed in a recent plant upgrade project.
Information on the existing hoist and trolley are as follows:
Hoist: Yale, model 651CL, serial no. AR-203058, 3-ton, cables with hook, speed 20fpm
Trolley: Louden, model 3HL, serial no. L17117T
Bidding documents include specifications of the new trolley and hoist (refer to specifications
attached to the IFB document). A mandatory pre-bid conference to allow contractor's to see the
existing hoist and layout is scheduled for Tuesday, December 15" at 10AM at the Nashua
Wastewater Treatment Facility, 2 Sawmill Road, Nashua, NH.
The hoist shall include a 3-year (minimum) warranty to be free from defects in workmanship
and/or materials under normal use that covers the body/frame, structural moving parts,
bearings, bushings, pulleys, electronics, and controls. The contractor will have 90 days to reach
substantial completion of the project, which assumes a 60-day lead time to order and deliver the
hoist and motorized traverse system, and an additional 30 days to reach final completion
229 Main Street « Nashua, New Hampshire 03061 © Phone (603) 589-3330 « Fax (603) 589-3233
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