Addendum 1 Bldg 1510 Fire Protection Upgrades.pdf

Fire Protection Upgrades in Building 1510 Work Order Number: 1558920

NSA South Potomac, Dahlgren, VA

ADDENDUM #1: March 12, 2021

AMENDMENT TO SPECIFICATIONS DATED AUGUST 08, 2021:

1. SECTION 01 11 00 “SUMMARY OF WORK”

a. ADD THE FOLLOWING PARAGRAPHS AND BID OPTION TO SUPPLEMENT

THE REFERENCED SPECIFICATION SECTIONS BELOW:

1.1 SUBMITTALS:

Contractor Bid Schedule:

All Contractors shall provide their bid proposal in accordance with the attached bid schedule. Proposals will not be accepted without completion of the bid schedule form. The Contractor can add additional definable features of work as necessary to help clarify their bid proposals.

1.2.1 Project Description:

Contractors shall bid only on the replacement of the existing Fire Alarm

System with a new Fire Alarm and Mass Notification System and Bid

Option-1.

Above ceiling work installed under this project shall be installed to accommodate future ceiling heights referenced in the contract drawings.

Work deferred to a future project includes:

Replacement and upgrades to wet pipe fire protection system.

Removal and re-installation of ceiling systems. Ceiling removal and replacement shall be limited to the minimum required for the fire alarm installation.

Demolition of Existing Halon System. Halon system shall remain operational throughout this project and be connected to the new fire alarm system.

1.2.1.1 BID OPTION - 1:

All fire alarm circuits shall be supervised as follows in accordance with

NFPA 72: Notification Appliance Circuit (NAC) to be Class A and

Synchronized Signaling Line Circuits (SLC) to be Class A

1.3 OCCUPANCY OF PREMISES:

Provide a phased construction plan to accommodate user occupancy during construction. Phasing plan shall be approved by the Construction Manager and shall include as a minimum the following:

Identification of critical spaces that cannot be vacated.

Demolition in each work area

New construction in each work area

Occupant moves required to vacate and repopulate work areas

2. SECTION 01 32 16.00 20 “SMALL PROJECT CONSTRUCTION PROGRESS

SCHEDULES”

a. ADD THE FOLLOWING PARAGRAPH TO SUPPLEMENT THE REFERENCED

SPECIFICATION SECTION BELOW:

1.7 ADDITIONAL SCHEDULING REQUIREMENTS:

Schedule shall include as a minimum all major features of work including, but not limited to:

Contract award

Project kick-off meeting

Phasing development, including review times and approvals

All required shop drawings and construction submittals

Review times (A/E and Government)

Fabrication and lead times of critical equipment and materials

Inclement weather days

All required construction timeframes, including, but not necessarily limited to:

o Mobilization

In order to minimize interruptions to building occupants associated with potential supply chain delays, Contractor shall procure all material, devices and equipment prior to mobilization.

o Phased construction elements o Acceptance Testing o Demobilization

3. SECTION 26 20 00 “INTERIOR DISTRIBUTION SYSTEM”

2.5 WIRES AND CABLES:

Wiring, Circuits and Conduit

Conductors and associated conduit will be specified new.

All terminations will be at a terminal strip and all appliances will have screw terminals. The use of wire nuts, crimped connectors, or twisting of conductors is prohibited. All wiring will be run to control panels in the vertical or horizontal plane, making all turns at 90 degree angles, and tightly bundle/wrap. All conductors will be identified individually with permanent markings.

All wiring will be solid copper, except for speaker circuits.

New dedicated 120 VAC, 20 amp power circuits will be provided for fire alarm control equipment. The associated circuit breaker schedule where the power circuit originates will be labeled indicating circuit to be "fire alarm circuit." The new circuit breaker will be provided with red marking and ability to be manually locked.

4. SECTION 28 31 76 “INTERIOR FIRE ALARM AND MASS NOTIFICATION

SYSTEM”

2.22 WIRING:

Wiring, Circuits and Conduit

Conductors and associated conduit will be specified new.

All fire alarm wiring will be provided in electric metallic tubing.

Initiating Device Circuits (IDC) – Class – B

Notification Appliance Circuits (NAC) - Class B

All terminations will be at a terminal strip and all appliances will have screw terminals. The use of wire nuts, crimped connectors, or twisting of conductors is prohibited. All wiring will be run to control panels in the vertical or horizontal plane, making all turns at 90 degree angles, and tightly bundle/wrap. All conductors will be identified individually with permanent markings.

All wiring will be solid copper, except for speaker circuits.

All signaling line circuits will be minimum 18 gauge wire.

Initiating device circuits will be minimum 14 gauge wire. Visual notification appliances circuits will be minimum 14 gauge wire.

5. ADD THE FOLLOWING SPECIFICATION SECTIONS (SEE ATTACHED):

01 31 23.13 20 ELECTRONIC CONSTRUCTION AND FACILITY SUPPORT CONTRACT

MANAGEMENT SYSTEM

01 57 19.01 20 SUPPLEMENTAL TEMPORARY ENVIRONMENTAL CONTROLS

01 58 00 PROJECT IDENTIFICATION

01 78 24.00 20 FACILITY ELECTRONIC OPERATION AND MAINTENANCE SUPPORT

INFORMATION (eOMSI)

6. ADD THE BID SCHEDULE (SEE ATTACHED):