Amendment 0003- CJD Elevators Replacement Site Visits May 2023.pdf
PDF 35 MB Posted
- Attached to
- Chief Joseph Dam Powerhouse Passenger and Freight Elevator Replacement Federal contract opportunity
- Solicitation number
- W912DW23R0005
About this file
This solicitation is for the replacement of the Chief Joseph Dam Powerhouse passenger and freight elevators. The project involves fully replacing both elevators, upgrading machine rooms and shafts to current codes, and other work. The freight elevator replacement includes a new hydraulic system, car, and controls. The passenger elevator replacement includes a new electric hoist motor and other components. Both will receive new operating and communication devices along with code upgrades to machine rooms, shafts, and fire systems. The government will use Low Price Technically Acceptable Best Value source selection. The NAICS code is 333921 and small business size is 1,000 employees. Offerors must register in SAM and check the website for updates. The solicitation number is W912DW23R0005.
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Text version
CHIEF JOSEPH DAM
OVERVIEW OF
FREIGHT AND PASSENGER
ELEVATOR REPLACEMENT
Date: Wednesday, 3 May 2023
Mtg Location: CHIEF JOSEPH DAM
POWERHOUSE PASSENGER ELEVATOR
REPLACEMENT
PASSENGER ELEVATOR | PROJECT DESCRIPTION
History The initial project for the powerhouse passenger elevator was constructed with the dam and dates back to 1955. It was rehabilitated in 2003. The elevator was originally constructed by Otis Elevator company and the elevator mechanical and control systems were last rehabilitated in 2003 by Armstrong Elevator company.
Project overview Chief Joseph Dam’s powerhouse passenger elevator outages regularly impact the daily work and safety of personnel in the powerhouse. The passenger elevator moves personnel to all elevation levels of the powerhouse at CJD. Dam workers and visitors are forced to use the stairs to access any powerhouse elevation during outages.
PASSENGER ELEVATOR | OVERVIEW
It is the only elevator servicing the powerhouse and is getting a lot of traffic.
The main access floor is at level 4 elevation 810.00.
Servicing 6 floors with front and rear access doors at level 2,4,5, and 6.
The powerhouse passenger elevator travel distance is 78 feet.
REAR ACCESS DOOR (LEVEL 2) FRONT ACCESS DOOR (LEVEL 2)
PASSENGER ELEVATOR | OVERVIEW
Replace Elevator Cab.
Add pressurization system to the elevator hoistway.
Connect the Fire Alarm Control Panel from the machine room to the Control Room on the floor below.
Increase elevator speed.
ELEVATOR SHAFT TRACTION HOIST ASSEMBLY
PASSENGER ELEVATOR | MACHINE ROOM
Replace all light fixtures in the machine room.
Replace existing wall separating the elevator machine room and exist staircase with a 2-hour rated partition. Also, replace the existing door with a 90 min fire rated door
ROOFTOP ACCESS DOOR
SPIRAL STAIRCASE TO
ACESS THE
MACHINERY ROOM
MACHINE ROOM
ENTRY DOOR
Elevator machine room is located above the elevator hoistway at elevation 860.50.
It was renovated during the 2003 rehabilitation project.
Besides the full elevator replacement, the scope of work also includes:
Replace all light fixtures in the machine room.
Replace existing wall separating the elevator machine room and existing staircase with a 2-hour rated partition. Replace the existing door with a 90 min fire rated door.
Replace existing ventilator with an access hatch. Reuse the existing concrete curb.
Replace in-wall heat pump.
Provide new metal step to replace the wood.
ELEVATOR MACHINE ROOM
ELEVATOR MACHINE ROOM
(EXCERPT FROM THE AS-BUILT)
Replace existing ventilator with an access hatch. Reuse the existing concrete curb.
Replace in-wall heat pump.
Replace louver with in-wall propeller supply, direct drive. To be controlled by the fire alarm control panel to pressurize the elevator hoistway.
MACHINE ROOM VENTILATOR (OUTSIDE)
MACHINE ROOM VENTILATOR (INSIDE)
EXISTING HEAT PUMP
POWERHOUSE HYDRAULIC FREIGHT ELEVATOR
REPLACEMENT
FREIGHT ELEVATOR | PROJECT DESCRIPTION
History The freight elevator was installed after the additional units were put in service at Chief Joseph Dam in the 1980s. The elevator was installed by US Elevator Corp and has not been rehabilitated. It has experienced operational issues and break downs which necessitated it being taken out of service for months at a time for maintenance. The elevator structure consists of a large, 48” square concrete column bearing on the walls and grade below.
Project overview Chief Joseph Dam’s freight elevator is currently experiencing operational issues that regularly impact the daily work and safety of personnel in the powerhouse. The freight elevator is used daily to transport mechanic’s toolboxes and electric carts which are driven onto the freight elevator accompanied by their operator from the station service switchgear floor (elevation 785) up to the main floor (elevation 810) of the powerhouse. Without use of the freight elevator, dam personnel must either hand carry the smaller load items or must use the bridge crane to move those loads, both of which impact the safety of personnel, operational readiness, and operational capability of project personnel due to lost work hours.
FREIGHT ELEVATOR | OVERVIEW
CONSTRAINTS:
The existing structure consists of a reinforced concrete column and enclosure walls.
Access to the sump pit is confined.
The concrete column has a steel sleeve installed that houses a hydraulic plunger.
The concrete walls were installed between floors on Elevation 785 and 810. The top of the elevator has a concrete wall and steel framed paneling roof system.
OPPORTUNITIES:
The elevator support structure has a steel framed roof/wall at the top level (Elevation 810) that can be disassembled, giving access to the sump and elevator plunger/jack for removal/replacement.
The elevator cab and support framing can be disassembled.
FREIGHT ELEVATOR | ELEVATOR BASE SUPPORT
Existing freight elevator cab is lifted via a 6” plunger diameter by 1/4” thick steel within a 16” diameter pipe.
The plunger and support framing bears on the concrete support and is located within an embedded steel sleave.
This plunger, or jack, presses on a steel plate and channel framing cab, which is guided by rails placed along the concrete walls. PLUNGER AND SUMP PIT
SUPPORT COLUMN
FREIGHT ELEVATOR | CAB FRAMING
The plunger pushes on a steel plate which supports two 8-inch channels.
The 8-inch channels support 4-inch framing that makes up the elevator cab floor (diamond plating).
The elevator cab walls around the perimeter 4-inch channels.
OPPORTUNITIES:
The existing steel framing is adequate to support an increased loading with minimal to no modifications depending on the disassembly and reassembly.
The framing can be replaced to accommodate any cab, or easily re-welded.
ELEVATOR CAB FRAMING
C4x4.5
C8x11.5
Plate
Plunger / Jack
Freight Cab
Flooring
FREIGHT ELEVATOR | MACHINE ROOM
Expand and enclose the elevator machine room.
New ships ladder to access Penstock elevation 758.000
Connect addressable smoke detector to existing fire alarm circuit (passenger elevator)
In-wall propeller exhaust.
New light fixtures.
FREIGHT ELEVATOR MACHINE SPACE CONFIGURATION OF THE PROPOSED MACHINE
ROOM
File details come from the government source that posted it. Updated .