Questions and Answers.pdf

Questions and Answers - asked during site visit:

1) Do the man bars on the supply ducts have to be at a certain height?

a. After discussing with security and facilities, we are able to build a cage on the outside of the supply without needing to enter the ducts. This is the best option as it removes need for asbestos abatement

2) Does the grounding distribution need to be removed as part of the wire and tubing removal?

a. Yes as long as the raised floor system stays grounded.

3) Can we take pictures?

a. No. My team will take pictures and send out based on the requested images of floor tile sticker (showing manufacturer), the cable way being removed, and the breaker panels.

Photos will be provided by email to contractors who attended the required site visit.

4) How do the remaining cables in the raceway need to be secured?

a. The remaining live cables can be clamped against the wall.

Questions and Answers - asked post site visit:

1. Will a bathroom be available for use inside the facility or should we plan on renting temporary toilets? Bathroom inside facility is able to be used.

2. Will more than one escort be available, in case contractors need to go in and out individually for tools or breaks? Or should we assume one escort, and everyone is in or everyone is out, all at the same time together? There will be at least 2 escorts available.

3. Is it possible to get the Prime contractor’s superintendent cleared as an escort? No. escort must be a DNA staff member

4. Will there be a laydown area right outside the building for a dumpster? Yes, a laydown area is available to place a dumpster

5. Will parking be available near the building? Yes, there is a parking lot near the quarterdeck.

6. Is all work and outages to be performed during normal working hours, Monday – Friday 8am – 4pm?

Or will there be work required on nights or weekends? No work required on nights/weekends.

7. Is there a requirement to set up construction barriers and negative air, to keep all dust and contaminants 100% contained in the work area? Or is typical dust and debris control acceptable?

Typical dust and debris control acceptable.

8. Is the current HVAC system under warranty? If so, can you let us know who holds the warranty, so we may contact them before disturbing the duct work for the burglar bars? Change in requirement to install bars externally means no disturbance of duct work required.

9. Can you let us know the requirement (i.e. anchoring, sealing, etc) or provide a sketch for the sealing of bulkhead openings? Due to the OSS certification, we would prefer to provide exactly what is required, instead of guessing. Per guidance, expanded metal can be affixed directly to surface of grates. All openings greater than 96 square inches require the security protections mentioned above. Openings smaller than 96 square inches must be sealed in a manner to detect attempts of entry. In areas such as around pipes which are fixed in place, an expanable foam is used to fully seal the opening and provide an ability for detection of penetrations. Construction methods such as drywall, masonry and metal coverings can be utilized as long as placement and use is consistent with the MIL HNDBK 1013/1A and prevent / detect entry attempts. Strength must be contiguous in form

/ similar to the perimeter of the space; prevention or detection of illegal entry by tools.

https://www.wbdg.org/FFC/NAVFAC/DMMHNAV/1013_1a.pdf.

10. What is the quantity and size of wall openings that need to be sealed for OSS certification?

Install expanded metal to 9"x 9" penetration point Main Entrance Overhead Install expanded metal to 6"x 6" penetration point Centerline Rear wall Install expanded metal to 9"x 9" penetration point Corner overhead left of main entrance door Install expanded metal to 4"x 4" penetration point Corner overhead left of main entrance door Install expanded metal to 16"x 14" penetration point Overhead, just left of main entrance door Install expanded metal to 21"x 20" penetration point Overhead, right of main entrance door Install expanded metal to 12"x 12" penetration point Overhead, right of main entrance door Install expanded metal to 6"x 6" penetration point Overhead, right of main entrance door Install expanded metal to 32"x 24" at firemain penetration point Overhead, above empty rack Install expanded metal to 16"x 12" penetration point Overhead, above secondary entrance door Install expanded metal to 8"x 4" penetration point Overhead, above secondary entrance door Install expanded metal to 18"x 6" penetration point Overhead above cableway Install expanded metal to 16"x 12" penetration point Overhead above cableway

11. What is the quantity of abandoned water lines that need to be sealed? 3, expanded foam is sufficient.

12. Can you provide the brand name, model #, type, or desired product for the following:

a. Raised access flooring

b. Ceiling gird and tile

c. Duct security bards

d. Cable trays

e. Floor boxes

f. Door sweeps

g. Rack and patch panel

h. Cove base

Brand not mandatory, but pictures for raised flooring has been provided.

13. Can you provide pictures of the following:

a. Existing panelboard

b. Underfloor conditions to asses demo of unused wiring and debris

c. Central patch panel

d. Cable rack to be demolished

e. General pictures of the room to determine the level of finishes to be repaired

Provided already

14. Existing Floor boxes appear to be wired to junction boxes with MC Cable. Is it acceptable to use MC

Cable for the New Installation? Yes, it is acceptable to use MC cable for the new installation.

15. It was discussed at the Walk Thru that all of the existing Grounding Conductors and Ground Plate be removed from under the Floor. These conductors appear to be independent of the Raised Floor. Is the Raised Floor Bonded to the Building Grounding Electrode System or will this need to be performed as part of the Scope of Work.

Floor system is separately bonded no additional requirement to scope.