RFB929300-01 - DHS STS School Gym Air Conditioning - Addendum #2.pdf
PDF 4 MB Posted
- Attached to
- DHS STS School Gym Air Conditioning
- Solicitation number
- RFB929300-01
- Issued by
- Hancock County, Iowa
About this file
Addendum 2 for RFB929300-01 is issued by the Iowa Department of Administrative Services (DAS) for the STS School Gym Air Conditioning project. The addendum addresses contractor questions and provides clarifications for the project, including confirmation that the gym will remain partially occupied during construction, with the work area separated by curtains. The contractor is responsible for providing their own lift and equipment, and must protect the gym floor from damage. The construction budget is detailed as Base Bid: $463,371.84, Alternate #1: $260,309.07, and Alternate #2: $68,040.00.
The addendum includes technical modifications to the project drawings, such as adding a water level detection device to the air handling unit, implementing a condensate pan overflow alert in the controls, and revising the maximum pressure drop for the evaporator to 15 feet. Substitution requests are approved for air-cooled chillers (Dunham-Bush) and DX coils (RAE Corporation and Precision Coils). The document also notes a site-specific condition requiring the contractor to account for installing equipment (ACCU-1) on sloped ground. Attachments include a pre-bid meeting sign-in sheet and interior photos of the gym air handler.
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Text version
Addendum 2 for RFB929300-01
Project Name: STS School Gym Air Conditioning
DAS RFB #: 929300-01
DAS Project #: 9293.00 Date: 5/26/2023
QUESTIONS FROM CONTRACTORS
Q1. Will STS residents and personnel occupy the gym during construction?
A1. Yes, the gym is divided into three separate courts and all use will be on the court opposite the construction. The area will be divided by curtains that hang and separate the courts to prevent interference.
Q2. What is the size of the insulated (hot) water pipes?
A2. There are two sizes with the big pipe being 3” and the small pipe being ¾”.
Q3. Is the contractor responsible for providing their own lift for this project?
A3. Yes, the contractor is responsible for providing their own lift and any other equipment needed to complete the project. Contractor is also to protect the gym floor from damage and pay for any damages they incur to the floor.
Q4. What is the construction budget?
A4. Base Bid: $463,371.84, Alternate #1: $260,309.07, and Alternate #2: $68,040.00
Q5. What is the existing chilled water system’s volume that is required to be cleaned per spec section 23
2500?
A5. The estimated volume is 1,400 gallons, but it is the contractor's responsibility to verify the actual volume.
The contractor may make a visit if they want a more accurate number.
CLARIFICATION FROM SITE VISIT
1. The ground is not flat where ACCU-1 will be installed. Please account for installing this on sloped ground.
CHANGES TO THE DRAWINGS
M100 – GYM MECHANICAL PLAN
1. ADD keynote M13 to the air handling unit which reads: “PROVIDE UL 508 AND PLENUM RATED
WATER LEVEL DETECTION DEVICE IN THE DRAIN PAN. WATER DETECTION DEVICE SHALL
SHUT DOWN THE UNIT UPON DETECTION OF WATER. SAFE-T-SWITCH SS3P OR EQUIVALENT.
M501 – AHU CONTROLS
1. ADD condensate pan overflow alert to the controls as a BI point. Command the unit to shut down upon detection of water from the water level detection device.
M500 – MECHANICAL DETAILS AND SCHEDULES
1. REVISE MAX PD (FT) of evaporator for CH-1 to 15 feet.
SUBSTITUTION REQUESTS
SECTION ITEM SUBSTITUTION
AND/OR APPROVED
EQUAL
23 6423 Air Cooled Chillers Dunham-Bush
23 8200 DX Coil RAE Corporation
23 8200 DX Coil Precision Coils
ATTACHMENTS
1. Attendees of the Pre-Bid Meeting – 5/19
2. Interior Photos of the gym air handler.
END OF ADDENDUM
C am
Sc an ne r
File details come from the government source that posted it. Updated .