W912DR22R0049-Amendment 0004 notes and clarifications-FA Life Safety and MECH Changes 9-28-2022 (004) (002).docx
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- Solicitation number
- W912DR22R0049
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This solicitation is for a firm-fixed price Design-Bid-Build construction contract to construct a two story 32,000 square foot Instructional Design Center/Distance Learning Center at Customs and Border Protection in Harpers Ferry, West Virginia. The project includes offices, open work areas, a green screen room, sound editing booth, collaboration rooms, conference rooms, and parking area. Requirements include utilities, storm water management, an elevator, HVAC system, electrical system, LED lighting, fire alarm and suppression systems. Finishes will be Class A. The construction magnitude is between $10-25 million and duration is approximately 550 calendar days from notice to proceed. Proposals are due on October 3, 2022 and will be evaluated using Lowest Price Technically Acceptable criteria. Vendors must be registered in the System for Award Management to receive an award. The soliciting agency is the Department of the Army Corps of Engineers Baltimore District.
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W912DR22R0049
Amendment 0004 September 28, 2022 Instructional Design Center / Distance Learning Center
DRAWINGS:
1. Fire Alarm (FA) and Life Safety Sheets (G) – FA001, FA002, FA111, FA112, FA121, FA122, FA501, FA701, FX001, FX111, FX112, FX121, FX122, FX501, FX502, G-004, G-110, G-111, G112, G-120, G-121, and G-122,
2. Sheet MH112: Added a keynote to address different chiller footprint that BOD.
3. Sheet MH121 & M-401/C11: Corrected the location of EF-2 exhaust grille to the elevator hoist way wall to match architectural updated wall location.
4. Sheet M-302/A3: Corrected the location of the boiler piping connection and showed piping continuation to boiler. Updated Keynote 1. See revised M-402 below (note 3).
5. Sheet M-402/B2: Corrected the boiler GHWR connection to the system heating supply line to act as an injection loop instead of parallel to the chiller. Added piping to boiler. Updated Keynotes 4 and 6.
6. Sheet M-601: Replaced Heat Pump Chiller Schedules to one non-manufacturer specific schedule. Updated Boiler Schedule with additional notes.
7. Sheet M-603: Updated Control Valve Schedule (moved from M-604) to add valve size to address a review comment. Revised a couple zones in VAV Box Schedule to match ventilation calculations.
8. Sheet M-604-607: Replaced previous ASHRAE 62.1 table to use a spreadsheet provided by ASHRAE/USGBC to calculate minimum ventilation requirement, per review comment.
9. Sheet M-805: Revised Sequence of Operation for Hydronic Heat Pump System, Added Supplemental Heating Boiler Sequence of Operation and Points Schedule.
10. Sheet M-806: Added Boiler to Hydronic Heat Pump System Schematic.
11. Sheet M-807: Added “UNOCCUPIED” to GHWS TEMPERATURE SETPOINT.
SPECIFICATIONS:
12. Section 23 64 10, paragraph 2.7.1: Delete the entire paragraph since there is no Refrigerant Leak Detector required.
13. Section 23 52 13: New added “Electric Boiler” section.
14. Section 28 32 76: Interior Fire Alarm and Mass Notification System, Addressable
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