B150_Q_&_A_as_of_14_Jul_17.pdf

W912LN-17-B-1001

F-35 ALTER BLDG 150 MX HANGAR POWER AND INST. EQUIPMENT ALL SPOTS

CURZ152802

QUESTIONS and ANSWERS

As of 7/14/17

1. Question: Is the following an acceptable substitution on this project - GE ELEMAX 2600

AWB system can meet the specification requirements and could be an alternate to the Grace, Perm-A-Barrier VP currently listed in the specifications.

Answer – GE ELEMAX 2600 AWB system is an acceptable alternate to Grace, Perm-A- Barrier VP.

2. Question: Please see attached substitution request for the hand dryers on the above project. I would appreciate consideration as an equal substitution. Our Dualflow Plus comes with a removable water-collecting tank for excess water that helps prevent spills on the floor and is also more cost-effective.

Answer – Dualflow Plus M14ACS-UL is an acceptable product for hand dryers.

3. Question: I came across this project and saw the below notation on the electrical drawing (E- 601-C) regarding the generator. Is it an existing generator or will you be procuring a new generator outside of the scope of this contract?

Answer – The generator is not part of the project. It will be owner furnished and owner installed.

4. Question: Mfg names for basis of design are listed in the specifications for the boiler, humidifier, ATC, and the VFD,s. However, no basis is listed for RTU, CRAC, VAV, MAU, fans and pumps. One item in particular, the basis of design, is seriously missing for the "preconditioned air system" (aka CAS). Since the CAS is special equipment this mfg if proprietary (or if not at least 3 names) needs to be provided. Please provide quickly in order for the equipment reps to be aware of this project.

Answer – For products that a basis of design manufacturer has not been provided, the contractor shall provide equipment that meets the equipment project specifications.

5. Question: On the bid form, line item 0006 Option #3 Compressed Air Systems has three parts. Is line item 0006 the total of lines 0006AA, 0006AB and 0006AC?

Answer – CLIN 0006 is comprised of three sub-elements 0006AA, 0006AB, and 0006AC.

Contractors only need to provide pricing information for each sub element, not a total price for CLIN 0006.

6. Question: Who provides the builders risk insurance for this project? If it's provided by the owner what is the deductible amount?

Answer – There is no builders risk insurance required on this project.

7. Question: Who carries the cost for asbestos abatement?

Answer – The Contractor is responsible for asbestos abatement costs.

8. Question: Spec section 01 45 00.00 10 Quality Control, calls for us to have full time employees as noted in the matrix on page 5. Please clarify how many of these people listed need to be employed by the general contractor for this project?

Answer – As part of the CQC organization, the contractor shall provide specialized personnel to assist the CQX Manager for the following areas: Electrical, Mechanical, Structural, Architectural, Materials Technician, and Submittal Clerk. Refer to Specification 01 45 00.00 10 Paragraph 3.4.3 for additional information.

9. Question: Who pays for the sitework compaction testing, concrete testing and other field testing?

Answer – The Contractor is responsible for all costs associated with required sitework, concrete, and field testing.

10. Question: I would like to formally request a bid extension of at least one week due to the July

Fourth holiday.

Answer – The government is strongly considering a bid extension. Exact length of time will be formalized in Amendment 0001.

11. Question: The product specified for the curtainwall is not a blast product it is a standard curtainwall double thermal product but will not meet blast requirements. Can we quote you the curtainwall that will meet the blast requirements instead?

Answer – Curtain wall system shall be equivalent to YKK 300 OG Hurricane Impact and Blast Mitigation Curtain Wall System.

12. Question: SECTION 00010 NOTES; Item No. 13. Is the Contractor Manpower Reporting in addition to OR in replacement of submitting the U.S. Department of Labor OMB No. 1215- 0149 form reporting for certified payrolls?

Answer – Contractor Manpower Reporting is in addition to Department of Labor payroll requirements.

13. Question: SECTION 00010 NOTES; Item No. 13: Is the Contractor Manpower Reporting organized by FSC code? In other words, hours and their dollar values are reported by FSC code versus by day as is reported on the OMB No. 1215-0149 WHD form currently?

Answer – Contractor Manpower Reporting is organized by FSC code. The government will provide the FSC code for this project. Reporting period will be the period of performance not to exceed 12 months ending September 30 of each government fiscal year and must be reported by 31 October of each calendar year. Contractor must report Direct Labor Hours on the project and Direct Labor Cost on the project.

14. Question: Invoicing and Payment: Does the owner have set retainage requirements for the project?

Answer – See FAR Clause 52.232-5 (e) for details. In general, Contracting Officer shall authorize monthly progress payments in full as long as the Contractor is making satisfactory progress.

15. Question: BID OPTION #2 / AFI #2 is described as being comprised of three (3) equal converters but Drawing E-402 shows elevations for five (5) positions, ie five equal converters. Shall we include quantity of three (3) or quantity of five (5) in the bid option?

Answer – There are five (5) equal converters in this project. The solicitation BID OPTION #2 will be officially corrected by Addendum to reflect the correct number of converters..

16. Question: What length of 270 volt dc power cable should be provided in the cable reels shown on Drawing E-402?

Answer – Provide 60ft cables for Aircraft Positions 1, 2, and 4. Provide 70ft cables for Aircraft positions 3 and 5.

17. Question: I did not see any specification describing the operating requirements for the 270 volt dc reels shown on Drawing E-402.

a - Are these to be motorized or manual cable reels?

Answer – The reels shall be motorized.

b - Are these to be enclosed or can they be provided without an enclosure?

Answer – Reels can be provided without an enclosure.

c - If these are motorized can they be manual feed and motorized retrieval?

Answer – Reels shall be motorized for both the feed and retrieval.

18. Question: Would the government be acceptable to changing Specification 26 35 44 Paragraph 2.21.9 enclosure rating from NEMA 12K to read NEMA 4. Most military aircraft hangars operate a deluge system that can hazard equipment. NEMA 4 offers a higher degree of protection than NEMA 12K with respect to expanding foam.

Answer – NEMA 4 Enclosure will not be required.

19. Question: Section 23 00 99: Aircraft, Preconditioned Air Units, Piping, and Accessories:

1.3.2 Performance Requirements

Mass airflow rate or pounds per minutes is specified at 46.5 (+/- 1). The variation allowance of +/- 1 is a very tight tolerance to hold. Our unit produces a minimum of 45 pounds per minute, but variations over 46 may be seen. May our standard aircraft preconditioned air unit’s PPM variations be accepted?

Answer – Mass airflow rates above 46.5 are acceptable.

20. Question: Section 23 00 99: Aircraft, Preconditioned Air Units, Piping, and Accessories:

2.6.3 Preconditioned Air Flexible Hose

Color is specified as yellow for the flexible duct. May olive drab color be accepted also?

Answer – Olive drab is an acceptable color.

21. Question: Spec section 32 92 23 calls for sodding. Is sod required on this project? If so, what areas receive sod?

Answer – All vegetated areas disturbed during construction shall be re-vegetated with sod.

22. Question: I have seen LEED referenced in the specification. Is this a LEED project? If so, what level of LEED is it?

Answer – This is not a LEED project. LEED references in project specifications will be deleted by Addendum.

23. Question: An aluminum screen wall is called for on A202. The product is Ametco Venetian

Line. Is there a specification for this material? What is the finish on this material? Please clarify.

Answer – Screen louvers to be welded V-shaped extruded aluminum main bars 2.625" centers with extruded aluminum framing bars, vertically installed. Screen louvers to be polyster power coated after fabrication, color dark bronze.

24. Question: The vertical lift hangar door upgrades requires us to work closely with the hangar door manufacture. Please provide a hangar door manufacture name and contact information.

Answer – Contacts listed below.

Kitty Duckett: Kitty.duckett@assaabloy.com Zach Kearney: Zach.kearney@assaabloy.com

ASSA ABLOY Entrance Systems Office: 678-782-4781 Fax: 770-631-5721 PO BOX 2957 - 350 Dividend Drive Peachtree City, Georgia 30269

25. Question: Drawings CD 101 and CS 400 show two large portions of slab removal and replacement. Drawings SD100 and S-100 don’t show these areas of slab being replaced.

Please clarify.

Answer – Demolition of the hangar slab shall be per the Civil Demolition drawings.

26. Question: Drawings CD101 and SD100 show tension ties for the roof trusses. Are these ties with-in the slab or under it? If in the slab, where are they located with-in the slab?

Answer – Slab is locally thickened and the tension tie is embedded in the slab. Typically, the tie is located towards the bottom surface of the thickened slab.

27. Question: On CD101 it shows us cutting and removing the slab in two areas. It also shows the tension ties running through this area at column lines N through T . If the tension ties are in the slab do we remove the concrete by hand from around them or leave strips of concrete in the crossed hatched areas as shown and pour the new 11” thick slab against them?

Answer – The slab shall be removed in its entirety. How the slab is removed is by contractor means and methods.

28. Question: Drawings SD100 shows removal of slab areas outside of the hangar bay. What is the slab thickness in these areas?

Answer – SD100 only shows demo of slab within the building footprint, please clarify which area is being referred.

29. Question: Where it shows us removing the trench drain along column line N on SD100, will this require us to remove any angles used to support this trench drain cover?

Answer – SD100 is only removing the trench drain cover. Existing drawings do not indicate an embedded steel angle frame.

30. Question: The grounding as shown on EG101 isn’t clear as to what is existing and what is proposed as new. Please see the attached sketch and clarify what is new and what is existing with-in the clouded area. Will additional concrete slab removal be required over and above what is shown on CD101 to install the grounding as shown on EG101?

EG101 Sketch For Grounding RFI.pdf

Answer – Pending

31. Question: Please provide a “basis of design” manufacture for the rigid rail fall protection systems as called for in spec section 11 01 50.

Answer – Basis of design is Gorbel Tether Track. Other manufacturers that meet the project specifications are acceptable.

32. Question: Please provide a “basis of design” manufacture for the barrier gate operator as called for in spec section 32 31 13.

Answer – Gate will be removed as part of Addendum.

33. Question: Please provide a “basis of design” manufacture for the monorail hoists as called for in spec section 41 22 23.19.

Answer – Basis of design is Gorbel trussed track enclosed bridge crane system. Other manufacturers that meet the project specifications are acceptable.

34. Question: I would like to confirm the requirement shown on drawing E-601, related to the electrical feeders for the fire pumps.

a. The note indicates we are to run (5) sets of 600 MCM cable to each fire pump. Is the accurate? The NEC only requires the feeder to be rated at 125% of the full load rating of the motor. This would result in approximately a 500 amp service.

Answer – Pending

b. Secondly, the NEC also requires this feed to be run outside the building. Drawing E-102, note 12 shows these feeders being run within the building. This is a clear code violation.

Answer – Pending

35. Question: Is a perimeter construction fence required for this project? If so, please indicate where it needs to be installed?

Answer – Perimeter construction fence is not required.

36. Question: Are there any information regarding the existing seamless flooring on concrete, where the new spec/epoxy will go? Specifically, is the chemistry, thickness, and manufacturer of the previous fluid applied flooring known?

37. Question: Will detail B2 on A008 apply to all of the exterior walls as noted on Note #3 on

AD001?

Answer – Yes.

38. Question: On S008 detail C4 it shows how to reinforce new masonry openings in existing walls. Interior door 106A and others doors call for detail B2 on A-611 which shows bullnose jamb blocks. Do we grout and install rebar as shown on S008 detail C4 or tooth-in new jamb blocks with a bull nose?

Answer – Grind existing CMU to create bullnose where indicated per architectural.

39. Question: Exterior door 137A and others call for reinforcing per details on S-008. Do we do this per the detail A1 on S-008 as referenced or do we remove blocks and tooth in?

Answer – Detail A1 and B2 on S-008 shall be used.

40. Question: Windows CW8 call for reinforcing per details on S-008. Do we do this per the detail A1 on S-008 as referenced or do we remove blocks and tooth in?

Answer – Detail A1 and B2 on S-008 shall be used.

41. Question: On S-008 details B3 and C4 seem to show us grouting the jambs and reinforce through the header reinforcing. Should this stop at the bottom of the header? If not, what sequence do we use to accomplish this and how high does the jamb reinforcing go?

Answer – Jamb reinforcement shall extend to the roof level. Steel lintel should be installed after the jamb reinforcement is complete (notch horizontal legs of angles to avoid jamb reinforcement). Once the jamb reinforcement and the lintels have been installed, the opening can be created.

42. Question: On A-651 detail A1 it shows a 7" x 3" x 3/8" angle at this opening. What is the purpose of this angle? Is it required?

Answer – Pending

43. Question: During the site visit walkthrough on June 28 2017, it was mentioned a phasing plan was going to be issued for the project in an addendum. Please advise if a phasing plan is still forthcoming in an amendment.

Answer – Communication service construction phasing requirement will be outlined in forthcoming Amendment.

44. Question: Sheet S-500-D shows specific locations for the fall arrest track connection points to the existing trusses for the four aircraft positions on the outer part of the hangar. However no connection points are shown for the system located along Col. 12 above the bridge crane.

Please provide information on where the center system is to be attached to the structure.

Answer – The fall protection system shall be supported from the primary trusses along grids R, S, T, and the column at grid intersection 12-U. Below is a snapshot of the existing connection from the existing drawings, and another snapshot showing connection points.

45. Question: Note #4 on S-500-D indicates that the fall restraint system above the bridge crane is to have a lock out/tag out system in place. In that the fall restraint system is a manual system and the bridge crane is a powered system, it is typically the bridge crane that would have a lock out/tag out procedure in place and not the fall restraint system. Please confirm that the lock out /tag out system is required for the bridge crane only.

Answer – Lock out/tag out is for bridge crane only.

46. Question: Sheet S-500-D indicates that the hook height of the crane is 32'-0" and that it is an underhung crane. The fall restraint rail is to be have bottom elevation of 36'-0". Please confirm there is sufficient space to install the fall protection rail.

Answer – S-500-D indicates bottom of steel elevation of 38'-0" above finish floor, and the roof structure is estimated to be approximately 5 feet above the 38'-0" dimension. There should be sufficient space for the fall protection rail.

47. Question: Polished Concrete is referenced on detail A3 on sheet A-701, please provide an applicable specification section for polished concrete. Is the polished concrete stained & polished or just polished?

48. Question: Does the grounding wire, shown on EG101, within the hangar need to buried 30” deep or just below the slab?

49. Question: Drawing CU101 shows a 1 ½” gas line being run to the building and P-402 calls for a 2” line. Please clarify.

50. Question: Spec Section 32 17 23 calls for pavement markings. Are pavement markings part of the scope of work? If so, where are they?

51. Question: According to the demolition notes on AD001 we can only remove as much roofing as we can replace or cover temporarily in a day. Since the steel decking on much of the roof area is being removed and replaced this method seems impractical. Will we be allowed to have portions of the building exposed while we replace the decking and reinforce the building structure?

Answer – Contractor will be allowed to have portions of building exposed while deck is being replaced and reinforcement of the building structure. All mechanical, electrical, fire protection, etc. items that are to remain are to be covered and protected from the elements.

52. Question: According to a test performed in 2012 asbestos was found on the piping with-in the perimeter trench in the hangar. Is this asbestos material part of the material that needs to be removed as part of this contract?

53. Question: Spec section 08 71 00 page 9 states products listed in the hardware sets are given as a basis of design, just clarifying that Allegion products may be used, as long as they are equal to the hardware specified.

Answer – Products that are equal to the design hardware are acceptable.

54. Question: The attached section of the sprinkler specifications state that the contractors is responsible for achieving the specified requirements of the bid documents. Our experience in Bldg 150 indicated there may be an issue with water supply into the building.

With this statement in the specs, would we be required to upgrade the water service into the building or possible providing a large water storage tank if the system as designed will not meet the design criteria ?

If the systems requires more gallons per minute then the city water supply can provide does this constitute "System Failure".

Bldg 150 Sprinkler spec .pdf

Answer – Please provide additional specific information on referenced water supply issues.

It is the responsibility of the contractor to design the system to the available water supply.

Changes in water supply are not the responsibility of the contractor to correct. In the design, a flow test was conducted and preliminary calculations were performed showing the water supply is capable. The contractor is required to perform their own flow test and their own calculations. If the flow test between preliminary design and contractors design changes dramatically, the contactor shall submit an RFI so that the issue can be further investigated and a way forward can be determined.

55. Question: The PCA unit we intend to supply is a water cooled unit, not air cooled. Will a chilled water supply via existing water tower or alternate source be available to be piped to each unit? Requested water conditions are: minimum input water properties of 3C and 1.7 liters/s and 4.9 psi pressure drop to comply with existing design.

Answer – Per specification paragraph 230099-2.1.h, air cooled condensers are specified.

There is no available cooling tower or water supply to support water cooled equipment, provide air cooled as specified.

56. Question: Drawing E-402-C shows Aircraft Position Elevations which include 100 Amp

Service Cart and 100 Amp PAO Cart Service Panels. Are there any available specifications for these devices?

57.

58. Question: Is it possible that the engineer could provide makes and models for plumbing and mechanical specialty items in spec sections 220000 and 230000 that follow the bases of design for the F-35 Alter Building 150 MX Hanger Power and Inst. Equipment all Spots?

59. Question: When will the contractor have access to B150 from the apron side due to current construction project.

Answer - Contractor will have access to B150 from apron side NLT 31 Dec 2017.

Access to this side will have to be coordinated to protect newly installed concrete.

60. As a follow up to Question #28. Please clarify he thickness of the slabs as noted in the attached sketch.

SD-100 Slab Areas Outside Hanger Bay Answer – Slab thickness ranges from 4” to 6” per existing drawings.

61. Since lead paint testing wasn't done on all the various parts of the steel structure in the hanger bay, are we to assume that all of the steel we will be welding reinforcing tees, girts, beams and angles onto will need to have lead abatement done to it before welding can take place?

62. On AD001 under Existing East Wing it says to demolish the structure except for the foundation. On AD011 it calls for demolishing the entire East wing including foundations.

Please clarify.

Answer – Foundation to be demolished as required for new structural foundation as indicated in structural drawings.

63. The drawings call for plastic blocking at the exterior blocking details. Would fire treated wood blocking be an acceptable alternative?

Answer – Treated wood blocking may be used except any blocking at roof which must be plastic lumber, NO WOOD on roof.

REMINDER – ALL QUESTIONS MUST BE SUBMITTED BY FRIDAY 21 JULY 17 –

FIVE DAYS PRIOR TO BID OPENING DATE.