Questions_and_Answers__6_-_10Nov_16.pdf

FA4621-16-R-0001

MACC SOLICITATION

FINAL QUESTIONS & ANSWERS #6

McConnell AFB, KS

10 Nov 16

QUESTION:

1. The Finish Schedule indicates to paint the ceiling in Bathroom D3 & Commons Area Bathroom C4. If this to get 4’ wainscot are we to paint above the wainscot or go buy finish schedule?

ANSWER:

The Amendment dated 8 Nov 16 clarifies this issue. Work should be done according to the Finish Schedule in this Amendment.

QUESTION:

2. Specification 23 05 93 Section 1.3 defines:

"Conduct DALT and TAB of the indicated existing systems and equipment and submit the specified DALT and TAB reports for approval. Conduct DALT testing in compliance with the requirements specified in SMACNA 1972 CD, except as supplemented and modified by this section. Conduct DALT and TAB work in accordance with the requirements of this section." What are the expectations for the Existing condition report? Is there to be a full assessment of the Air & Hydronic Systems prior to demo? The 23 05 93 Section references DALT, but there are no further mentioned requirements of DALT within the 23 05 93 Specification. Is DALT a requirement?

ANSWER:

3. There will be no duct air leakage testing (DALT) in this project. The references to DALT are in error.

They are part of the template specification that the Government uses but should have been deleted before issuing. Disregard any reference to DALT requirements in the specifications.

Since much of the existing ductwork and piping are located within duct chases, it will be impossible to fully inspect and assess these systems. For purposes of this project, the documents indicate which pipe or ductwork is to be replaced and which is to be reused. During the course of work, if the Contractor notices issues with the existing piping or ductwork that is planned for reuse then he shall notify the Contracting Officer and 22nd CES.

QUESTION:

4. Regarding Specification 32 31 00 – Fences and Gates, Paragraph 1.2A, can the Government confirm that the fence heights at Bldg’s 340, 342 and 350 are 12ft, 12ft and 8 ft respectively.

ANSWER:

Yes, the existing fence heights at Bldg’s 340, 342 and 350 are 12 ft, 12 ft, and 8 ft respectively. The new fences are expected to have these same heights.

5. Regarding Specification 32 31 00 – Fences and Gates, Paragraph 1.1A and 1.3A, Rhon Inc. Fence:”

Industrial Steel Semi Private Fence” is a fence with panels on the front side only, commonly Board-on – Board, please confirm that the Government requires the fence to be “Shadow Box, panels on both sides.

ANSWER:

Shadow box panels are required as indicated in the Specification.

QUESTION:

6. Regarding Specification 32 31 00 – Fences and Gates, Paragraph 1.2C and 2.1B, the design of the fence, if shadow box, with a spacing of 5-1/2” between panels and with a 5-1/4” panel width on the front and back will yield a see-through gap between the front and back panel of ¼” on each side. Please confirm this is the design required by the Government.

ANSWER:

For bidding purposes, assume that the panel width is 5 ¼” and spacing is 5 ½” as indicated in Specification. Actual installation might vary somewhat; however, if variances result in cost differences, this will be dealt with separate from the Contract.

QUESTION:

7. Regarding Specification 32 31 00 – Fences and Gates, would the Government please confirm that the MAFB standard design criteria for wind loading is 90 mph.

ANSWER:

Government is not confirming that the fence is designed for a 90 mph wind load and it is not asking the Contractor to confirm this. The intent is for the Contractor to build the fence as indicated by the drawings and specifications (and as modified within the Questions and Answer documents).

QUESTION:

8. Regarding Specification 32 31 00 – Fences and Gates, Paragraph 2.1E, should the 90 mph wind loading be confirmed, would the Government please confirm that for fences at 340/342 @ 12’, the gate post must be 6” X 6”.

ANSWER:

Contractor should plan on providing and installing 6” x 6” posts at Bldg. 340 & 342, not 4” x 4” posts as indicated in Specification. Bldg. 350 posts will still be 4” x 4”.

QUESTION:

9. Regarding Specification 32 31 00 – Fences and Gates, Paragraph 2.1E, would the Government please confirm that all sections cannot be 98-1/2” OC due to the inconsistent dimensions of the fence to be installed and the possible wind loading?

ANSWER:

In order to fit the dimensions of the existing utility yard and maintain even section widths, it might be necessary to alter section widths so that they are not exactly 98 ½” on center. Dimensions of the sections widths will be kept as close to 98 ½” as practical.

10. Regarding Specification 32 31 00 – Fences and Gates, should the 90 mph be confirmed, would the Government require stamped engineering for the fence design?

ANSWER:

Stamped drawings are NOT required for the fence installation.

QUESTION:

11. Sheets M-503 (Bldg. 340 & 342) and Sht. M-502 (Bldg. 350) have details for seismic bracing but there are no specs or call outs for these details in the drawings. Is seismic bracing required?

ANSWER:

Yes, seismic bracing is required throughout the building by Air Force regulations since these buildings are living quarters. All bracing and pipe and unit supports shall be as indicated in the details on Sht.

M503 (for Bldg’s 340 & 342) and Sht. M502 (for Bldg. 350).

QUESTION:

12. The mechanical schedules call for Liquid solid separators but the drawings do not show where they are located, this is an air cooled chiller with a closed loop glycol system. Where these separators supposed to go?

ANSWER:

For bidding purposes, assume that the liquid solid separator in Bldg’s 340 & 342 will be installed on the floor along the wall opposite the boiler and domestic water heating system. The separator might actually be installed in a different location. If this creates a difference in cost, it will be dealt with separate from the contract.

QUESTION:

13. Are there As-Built drawings for the fuel lines required to be excavated and removed completely?

ANSWER:

As builts showing the fuel lines were issued in late October. The sheets showing the fuel lines are attached with these questions for convenience.

QUESTION:

14. Some chiller manufacturers do not provide a unit-mounted 208 volt disconnect switch.

ANSWER:

Electrical contractor shall provide non-fused disconnect in NEMA 3R enclosure. Switch shall be mounted on the enclosure wall or on Unistrut frame near chiller. Scheduled chiller has MOCP rating at 500amperes. Contractor shall verify required size of local disconnect with the chiller manufacturers requirements.

15. Some chiller manufacturers may not be able to unload to the 10% of rated capacity rating using only variable speed or digital scroll compressor.

ANSWER:

The use of hot gas bypass for low capacity operation is acceptable. Hot gas bypass by itself is not acceptable means of capacity control.

16. Specification 23 64 10, Paragraph 1.7 indicates a 5 year warranty on chiller compressors.

Specification 23 64 10, Paragraph 1.7 indicates a 10 year parts and labor warranty on chiller compressors. Air-cooled chiller schedule on Sht. M-602 indicates a 5 year warranty on compressor..

ANSWER:

Chiller shall be provided with a 5 year parts warranty on the chiller compressor. The requirements of Paragraph 1.7 should be disregarded.

QUESTION:

17. Note 5 on Sht. M602 (Bldg 350) indicates DOAS units require stainless steel for all wetted surfaces.

Please explain.

ANSWER:

The drain pan and the coil frame will need to be made of stainless steel. The unit casing and other components are not considered wetted surfaces and do not need to be made of stainless steel.

18. Regarding the fan coil units to be installed in the kitchens and listed in the Fan Coil Unit Schedule, Sht. M-601, those identified FC-A202 & FC-A302 have a model number of 42CKA02 while those identified as FC-B202 and FC-B203 have a model number of 42CEA02.

ANSWER:

All kitchen fan coil units, FC-A202, FC-A302, FC-B202 and FC-B302 shall be based on model number 42CKA02. The model number 42CEA02 is an error and should be disregarded.

QUESTION:

19. In regards to the chiller specifications, is a plate evaporator allowable if equivalent capacities and efficiencies are provided?

ANSWER:

Chillers with chilled water capacities that meet or exceed the stated capacities and with efficiencies (full load and part load) that are comparable (within 10 to 15%) to those of the basis of design and built with similar quality to those of the basis of design will be considered equal.

20. Are microchannel condenser coils acceptable?

ANSWER:

It is unclear to 22nd CES what a microchannel condenser coil is and whether or not it would be comparable to the condenser associated with the basis of design. Chillers with chilled water capacities that meet or exceed the stated capacities and with efficiencies (full load and part load) that are comparable (within 10 to 15%) to those of the basis of design and built with similar quality to those of the basis of design will be considered equal.

21. Do the condenser coils need to be coated?

ANSWER:

Yes, Specification 23 64 10 (from Amendment dated 27 Oct 16), Paragraph 2.5.9 indicates “coil shall be entirely coated with the manufacturer’s standard epoxy or vinyl coating.”

QUESTION:

22. Regarding the specific factory and field extensive chiller testing as specified. Since packaged air cooled chillers utilize the same components for each model, is a factory certified performance test with documentation required for each specific chiller on this project? The cost can be several thousand dollars per unit. Also, is a field performance test with documentation required for each specific chiller on this project at 3 different times with ambient temperatures a minimum of 5 degrees apart?

ANSWER:

Factory certified testing of the specific chiller that will be delivered to the job site is not required, but the contractor will still be required to submit factory tests that indicate that the series of chillers meet the requirements of the specifications. In other words, the actual factory testing can be done on a similar chiller in that series and the manufacturer’s standard test results can be submitted. Contractor will be required to demonstrate that the chiller is working properly. This can be done by operating the chiller during start up with the factory representative on site. It will not be necessary to demonstrate chiller performance at (3) different times with ambient temperature a minimum of 5 degrees apart.

QUESTION:

23. The specifications state that only solder joints are allowed for copper joints 2” and smaller. We are asking if propress lock style fittings can be added to the spec allowing for greater flexibility in dealing with leak by on valves in all buildings and the installation of the y strainers in building 350.

ANSWER:

Pro Press fittings will be acceptable for use on this project.

QUESTION:

24. It appears per spec 23 05 15 2.1.4.1 that only brazed joints are allowed. Will solder joints be allowed?

ANSWER:

Solder joints are acceptable for use on this project.

25. It appears per spec 23 05 15 2.3.1 that only threaded ball valves are allowed on 2” and smaller.

Would solder or press lock valves be acceptable?

ANSWER:

Solder or Pro Press valves are acceptable for use on this project.

QUESTION:

26. Regarding the Fan Coil Units, are factory provided valve packages and control valves (provided to manufacture by the temperature control contractor) all to be factory mounted?

ANSWER:

Yes, Specification 23 82 19.00 40, Paragraph 2.2.8 indicates that the valves shall be factory-installed.

QUESTION:

27. In amendment #3, Note 2 b and Specification 09 51 00, Paragraph 2.1.1.6 indicates using 2x2 in the commons area, but finish schedule say nothing about work in common area. Is there any ceiling work in the common area?

ANSWER:

Please disregard the second sentence in Spec 09 51 00, Paragraph 2.1.1.6 referencing work on common room ceilings. These common room ceilings will be reused.

28. There is a new note on AD101 (rev 11-8-16) that says we are to paint both sides of hollow metal frames in the living areas & common areas. Originally we were only required to paint the exterior door & frame. Now we are paint all door frames completely and both sides of the exterior doors is that correct? Also, is it correct that we are not doing anything to the finish of any interior doors?

ANSWER:

The requirement for painting both sides of hollow-metal frames in the living and common areas was added as part of the Amendment issued on 26 Oct. 16. See Sheet AE101 of that Amendment. All door frames shall be painted completely and both sides of the exterior doors shall be painted. All interior doors are wood doors and they shall be reused as-is. There is no finish work associated with the interior doors themselves, just the interior door frames will be painted.

QUESTION:

29. As per previous question, do we reuse the existing towel bars & toilet paper holders removed from existing tile and put back on the new tile surface?

ANSWER:

The Contractor should plan on reusing existing towel and toilet paper holders or that the Gov’t will provide new towel and toilet paper holders.

30. Drawings C-001 States that we are to Remove the existing wall and footing. Are there any as built that show the size of the existing footing below grade? Base on the size of the wall, it appears that it will undermine the tank & other foundations.

ANSWER:

22ND CES believes that removing the screen wall can be done without undermining the foundation of the fuel storage tank. For bidding purposes, assume that the brick screen wall can be removed without undermining the foundation of the fuel tank. 22nd CES will look into this issue further. If it is later determined that measures need to be taken to protect the fuel tank foundation, this will be addressed separate from the contract.

QUESTION:

31. In a previous Q&A response, it was clarified that the TCC will provide the network switches. The follow up question is "which manufacturing brand is required for the network switch?"

ANSWER:

For bidding purposes, assume the network switches will be manufactured by Cisco Systems or Dell.

Other switches that meet the Buy-American Act and are comparable to those manufactured by Cisco Systems or Dell and approved for use on a military base will be considered equal.

QUESTION:

32. For each building, the temperature controls will need the termination locations for the automation server network controllers. Can you provide the node room location for these network switches?

ANSWER:

The automation server network controllers will be located within the main mechanical rooms at Bldg.

340 & 342 in the same locations or adjacent to the existing UNC’s. Sub-level controllers can also be located within the main mechanical rooms or the 2nd and 3rd floor mechanical rooms. The locations of these rooms, as well as the COMM Room (node room), are shown on drawings attached with these questions and answers. The locations shown are typical for both Bldg. 340 and 342.

Bldg. 342 has (11) Quads, not (10) as shown