Questions_and_Answers_32-87_W91242-18-B-0891.pdf

Questions and Answers #3 Solicitation Number W91242-18-B-0891

32. Question: Specification 080400, 1.5, A makes reference to blast resistant doors “are scheduled on the architectural drawings” Review of A-604 door schedule does not find any of the doors noted as being blast resistant. Please confirm these doors do not require blast resistance.

Answer: See Amendment 0004, revised A-604 C-17 HANGAR DOOR SCHEDULE for doors that required blast resistance.

33. Question: A-602 Finish Schedule room H137 keynote 13 and H155 keynote 12 make reference to resinous flooring cost to be provided in optional line (OLI) item. OLI 002 only references the Hanger Bay. Please confirm that resinous flooring for H137 and H155 are to be included in OLI 002 pricing.

Answer: See Amendment 0004, revised A-602 and revised specification section 012300 - OPTIONAL LINE ITEMS (OLI'S) for resinous flooring locations.

34. Question: A-602 Finish Schedule notes both SC (sealed concrete) and SC-1 at various rooms. There is no description of what SC-1 should be, please advise.

Answer: See Amendment 0004, notation SC-1 revised to read SC on A-602.

35. Question: Specification 012300, 3.1, B, 1 Fuel Resistant Resinous Flooring Option Line item: The option description makes reference to a “Finish Floor plan for extent”. We do not find that a finish floor plan was issued with bid documents. Can a drawing be provided showing complete extent of the RF flooring (i.e. does it extend into hanger door pockets? Confirm it extends to adjacent office walls including RF base, where will be the cut-off point between Hangar Bay and adjacent H165 and H156 rooms? Etc.).

Answer: See Amendment 0004, revised specification section 012300 - OPTIONAL LINE ITEMS (OLI'S) and revised Sheet A-602 - C-17 HANGAR ROOM FINISH SCHEDULES for resinous clarified flooring locations.

36. Question: Reference Drawing FX-112, Keyed Note 19. Please indicate how this line is routed and connected to tank?

Answer: This note and the return line to the tank shall be deleted. There will be no return line to the tank. See Amendment 0004, revised Sheet FX-112.

37. Question: Specification section 01 50 00 2.2 calls for the contractor to provide 2 private offices for use by the government. Specification section 01 10 00 1.3D states that temporary government office (swing space) is not required. Please clarify which statement is correct.

Answer: Specification Section 01 10 00, 1.3.D does not refer to government field office. It states 'temporary office swing space' of which it states it is not required. See Amendment 0004, updated Specification Section 01 50 00, Section 2.2.B, for amended requirements (e.g. elimination of drinking water, coffee machine and supplies and telephone and ‘high-speed’ internet connectivity requirements).

38. Question: Specification Section 01 14 16 1.6D Foreign Object Debris (FOD) Requirements states that contractor shall provide appropriate manpower and FOD detection equipment to prevent object debris from construction activities to impair and harm operations of aircraft and personnel.

Please provide additional detail on specific detection equipment and monitoring required by the contractor. Is there a specific manufacturer or type of system? Requirements for level of detection or frequency?

Answer: See Amendment 0004, revised Specification 01 14 16, for clarified Foreign Object Debris (FOD) requirements.

39. Question: Sheet P-601 Plumbing Fixture Connection Schedule notes Lavatory Type L-1 is to be integral with countertop, however, the American Standard model number provided is for a separate self-rimming sink. In addition, Section 22 42 16.13 para 2.1 calls for a self-rimming type sink for above counter mounting. Please clarify which is correct.

Answer: The sink is a separate self-rimming counter mounted sink and not an integral bowl type sink. See Amendment 0004, revised L-1 description in the Plumbing Fixture Schedule on sheet P- 601.

40. Question: Drawing G-002, General Note 35 references Termite protection being required. Will a specification for Termite Protection be issued on this project?

Answer: Yes. See Amendment 0004, revised Specification Section 31316 - TERMITE CONTROL.

41. Question: C1 and C3/A403, Keyed Note 20 references recessed projector screens. No specification was issued for these. Provide the make, model and size required for projection screens.

Answer: See Amendment 0004, revised Specification Section 115213 - PROJECTION SCREENS.

42. Question: Specification 012300, 3.1, A: Operable Partition Option Line item: Description makes reference to “this would replace the gypsum wall board partition as indicated on the floor plan.

Review of A-102 does not find a call out on what partition type this is to be in the base bid.

Answer: See Amendment 0004, revised Specification Section 01 23 00 clarifying Base Bid requirements in lieu of the Operable Partition.

43. Question: Please provide spec section 07 84 13 "Penetration Firestopping" as referenced in other spec sections.

Answer: See Amendment 0004, revised Specification Section 078413 - PENETRATION

FIRESTOPPING.

44. Question: CD-101, C-001 - Key Note 11 on CD-101 is calling out the "+" hatched areas which indicates to remove rigid concrete with 2" asphalt overlay pavement. The "+" hatching on the Site Removal Legend on page C-001 indicates rigid concrete pavement removal. The cross hatching above that one on C-001 indicates rigid concrete with 2" asphalt overlay pavement removal. The cross hatching is shown on CD-101, but it is not noted in the Key Notes. Please clarify which thickness and pavement material is to be removed.

Answer: See Amendment 0004, revised Sheet CD-101, clarifying limits of rigid concrete and rigid concrete with 2-inch asphalt overlay pavement removal. Refer to the boring logs within the Geotechnical Investigation Report, provided as supplemental (non-binding) information, to determine the depth of asphalt and concrete pavements that are identified to be removed on sheet CD-101.

45. Question: '083620 - 2.5.D - Please confirm that the hangar doors are required to have photoelectric sensors and self-monitoring obstruction detection devices.

Answer: Provide Hangar Doors as specified.

46. Question: Div 33 - Please provide specifications for the sanitary sewer and water utilities.

Answer: Refer to specification sections 22 11 13 FACILTIY WATER DISTRIBUTION PIPING and 22 13 13 FACILITY SANITARY SEWERS for product and installation requirements related to the water and sanitary sewer site utilities.

47. Question: CU-101 - Note 10 on CU-101 calls out a 5,000 gallon double -walled underground storage tank. Please provide a detail and/or manufacturer which includes installation requirements.

Answer: Refer to specification 23 13 13 FACILITY UNDERGROUND STORAGE TANKS for material and installation requirements related to the 5,000 gallon double walled underground storage tank.

Basis of design is the HighGuard Underground Steel Storage Tank (HT-1089) by Highland Tank.

48. Question: CU-101, FX-112 - According to CU-101 (note 13), the incoming water line to the pump building is a 16” line. Per FX-112, the line (note 7) is a 12” line. Is the 16” to be reduced to 12” before entering the pump building? Please clarify.

Answer: Per sheet note 2 on sheet CU-101, provide transition fitting to transition between 16-inch pipe on sheet CU-101 and 12-inch pipe identified on sheet FX-112.

49. Question: CU-101 - Per CU-101 (note 15), 16” incoming line is to be connected to the existing 5,000gal tank with a tapping tee connection. Is the tap at that location to be made above or underground?

Answer: Per sheet note 10 on sheet CU-101, an existing 16-inch water line is routed between existing water storage tank 'TANK 137' and 'BLDG 52'. The precise location of the water line is not shown on the existing conditions/topographic survey; however, information is based on record documentation provided by the North Carolina Air National Guard. Contractor shall dig test pit to field verify precise location of the existing water and provide a tapped connection for the new 16-inch water line. The connection shall be made underground.

50. Question: Please clarify blast requirements as they relate to windows, man doors, and overhead doors. The door schedule does not specifically note blast ratings for individual doors. The door hardware sets do not indicate provisions for blast requirements. The doors and hardware specifications do not specifically call out blast requirements. There is a blast resistance specification 08 04 00 which states in section 1.5 that "Blast resistant door and window systems are scheduled on the architectural drawings." The window systems are noted as blast resistant, but the doors and hardware are not. Section 1.3 of 08 04 00 classifies Areas A and B of the building to be "Primary Gathering/Low Level of Protection" which indicates that the doors and hardware specified should meet those requirements. It also states that Areas C, D, E, and the fire pump house are "Low Occupancy" which are exempt from blast requirements per UFC 4-010-01 section 1-9.1. Please provide notes on the door schedule indicating which doors shall be blast resistant and what performance criteria should they meet.

Answer: See Amendment 0004, revised Drawing A-604 C-17 HANGAR DOOR SCHEDULE for doors that required blast resistance.

51. Question: Can the final placement of paint booth/sanding room equipment be such that there is a 3 ft space around the entire “module of booths”?

Answer: No. Do not relocate paint booth/sanding room complex. Equipment vendor should supply closure panels between Paint Booth and outside wall (front, back and top) to prevent any debris accumulation between booth and outside wall per NFPA 70.

52. Question: CU-101, there is a 5,000 underground storage tank shown in the vicinity of the OWS separator shown on plumbing drawings. It appears sanitary sewer piping is connected to it but the spec is located in HVAC section. What is this tank for?

Answer: The intent of the 5,000 gallon underground storage tank to capture an inadvertent spill containing either fuel, oil, or solvent that enter the trench drains located within the hangar. A manual push/pull botton control will be activated to route the spill to the containment tank in lieu of flowing into the santiary sewer system. Refer to sheet P-102 for further clarification.

53. Question: There is no schedule for the HR-3 hose reel; however, they show them located throughout the composite shop.

Answer: See Amendment 0004, revised hose reel schedule on sheet P-601 for the HR-3 hose reel.

54. Question: Is the piping material for the breathable air to be the same as the compressed air. (Sch 40 Galvanized)

Answer: Sch 40 galvanized piping is not acceptable for breathing air piping. Provide copper medical gas tube, ASTM B819, Type L, seamless, drawn temper that has been cleaned, purged, and sealed according to CGA G-4.1 for oxygen service. See Amendment 0004, revised Spec section 23 15 13.

55. Question: Would press fit copper be acceptable for the domestic water systems? (it is acceptable by NC code)

Answer: Press fit copper piping is acceptable for the domestic water piping systems.

56. Question: Would No-Hub Cast Iron with HD couplings be acceptable for the sanitary underground (it is acceptable by NC code)

Answer: Yes the hubless cast iron piping is acceptable for the underground sanitary piping.

Ensure that the hubless piping meets the standards outlined in section 22 13 16 of the specification.

57. Question: Neither the plans nor the specs seem to indicate whether or not the cantilever gate per Detail 8/C-501 shall be manual or motorized. Please advise. If a motorized gate is required, please provide a Basis of Design for the gate operator.

Answer: Cantilevered sliding gate is manual, not motorized.

58. Question: Drawing FX-112, fire pump, indicates the boost of the new pump is to be 200psi. This is excessive and well beyond pump pressures at other ANG facilities that I’ve been in. This also creates a problem with the type of fittings used at the pump house and hanger as normal fitting pressure ratings have a maximum rating of 175psi. Is a lower pump pressure rating acceptable? Based on taking suction from the ground level water storage tank, the pump boost pressure should be around 150psi.

Answer: The 200 psi pressure boost is required due to the excessive pressure losses in the equipment required by UFC 4-211-01. Additionally, these fire pumps will also serve an adjacent hangar. A complete system design must be provided by the contractor to jusitfy a lower pressure rating for the fire pump.

59. Question: Along with the 200psi boost, drawing FX-001 states the static and residual pressures at the site are 66psi and 55psi. I don’t see that this is relevant as the fire pump is taking suction from a ground level water storage tank that is only going to have head pressure based on the height of the tank, probably around 12-17psi. Please verify that the fire pump is indeed taking suction from a ground level storage tank and verify height of the tank.

Answer: The pumps are not supplied by the combined domestic/fire mains. The water supply information provided is for information only since the fire hydrants are supplied by the combined domestic/fire main. The fire pumps are supplied from the ground level storage tanks.

60. Question: Drawing FX-112 indicates the discharge pipe of the fire pump is to be 16” in diameter. Please note valves in this pipe size, specifically the OS&Y control valve and check valve, are not available from any manufacturer “Fire Rated” as there is not a big enough market for these sizes for the manufacturers to spend the money to have the valves tested and listed. Please verify that it is OK to use unlisted valves for these sizes.

Answer: The fire pumps must supply Hangar 51 located to the northeast of the new hangar.

Pressure losses in the supply piping must be kept to a minimum in order to meet the estimated pressure demands of Hangar 51. A reduced size pipe will be considered if the contractor provides calculations to demonstrate that the required flow and pressure will be met with the reduced size pipe. Otherwise, the 16" pipe must be provided.

61. Question: In accordance with the project documents, an AMES in-building riser seems to be required. The AMES in-building risers have a maximum size of 10” in diameter and Drawings FX- 112 shows a 16” coming into the pump house and a 12” coming into the building. These two pieces of pipe will have to be custom fabricated and will not be the AMES product as called out. Please confirm that custom fabricated pipes are acceptable. If not, please consider reducing the pipe size for both applications so that AMES products can be used as required.

Answer: Piping may be custom fabricated to the requirements of UFC 4-211-01 or the pipe size may be reduced based on the acceptance of the contractor's final design calculations.

62. Question: Please provide a detail for the power wash stations.

Answer: Power Wash system Basis of Design manufacturer specification shown on P-601.

Additionally, supporting infrastructure to include but not limited to: piping type/schedule, insulation, etc are indicated within project specifications. All ancillary equipment and accessories to provide a complete and usable system shall be installed per all manufacturers' requirements.

63. Question: Please advise on what height the HR-2 hose reels shall be installed and where the controls associated with said hose reel(s) should be located.

Answer: The HR-2 hose reels shall be mounted above the clear zone area of the aircraft and attached to the structure above. Refer to architectural plans for clear zones above aircraft. The associated controls for the hose reels are located in a panel mounted on the wall in the Hangar.

Refer to sheet EP104 for location of panel and additional information. Ensure all controls and assembly for cord reels and hose reels are wet location rated.

64. Question: Specification 080400-1.5-A says that blast-resistant doors and window systems are scheduled on the drawings, but we do not see this information in the drawings. However, section 1.10-A-1 of this specification says that all exterior doors must meet blast requirements as specified in the following parts. Please either confirm that all exterior doors must meet blast requirements or update the door schedule on A-604 to clearly indicate blast requirements for all doors as applicable.

Answer: See Amendment 0004, revised A-604 C-17 HANGAR DOOR SCHEDULE for doors that required blast resistance.

65. Question: Please confirm the door labeled H004 on page A-142 is the same as the door labeled HS401 on pages A-421 and A-604, not an additional door or requirement.

Answer: See Amendment 0004, revised Drawing A-142 for revised Door Tag.

66. Question: Detail 7/C-503 shows a Post Indicator Valve detail. There are no PIV's shown on the utility plans. Please clarify where/if the PIV is required.

Answer: A post indicator valve is not required and has been removed from sheet C-503. See Amendment 0004, revised sheet C-503.

67. Question: On CS-102, the Legend for joint "D" is a Doweled Butt Joint. There does not appear to be a corresponding detail for this condition. Please clarify or provide a detail for this joint type.

Answer: See Amendment 0004, Detail 4 on revised sheet C-506 for Doweled Butt Joint.

68. Question: Detail 6/C-502 is for asphalt milling and overlay. Please identify where this pavement type is used. All pavement appears to be new full depth paving.

Answer: Mill and overlay 12-inches of existing asphalt surface course on either side of utility trenches through existing pavement.

69. Question: Drawing P-601. Please provide information in the schedules for HR-3 Hose Reel - they are shown located throughout the composite shop.

Answer: See Amendment 0004, revised hose reel schedule on sheet P-601 for the HR-3 hose reel.

70. Question: Drawing P601. Please provide drawing details for the Power Wash Stations.

Answer: Power Wash system Basis of Design manufacturer specification shown on P-601.

Additionally, supporting infrastructure to include but not limited to: piping type/schedule, insulation, etc are indicated within project specifications. All ancillary equipment and accessories to provide a complete and usable system shall be installed per all manufacturers' requirements.

71. Question: Drawing P-601. Please clarify what height the HR-2 hose reels are to be mounted.

Answer: The HR-2 hose reels shall be mounted above the clear zone area of the aircraft and attached to the structure above. Refer to architectural plans for clear zones above aircraft.

72. Question: Drawing P-601. Please clarify where the controls for the HR-2 hose reels are to be mounted.

Answer: The associated controls for the hose reels are located in a panel mounted on the wall in the Hangar. Refer to sheet EP104 for location of panel and additional information. Ensure all controls and assembly for cord reels and hose reels are wet location rated.

73. Question: Drawing P-601. Please provide hookup details for PWO and PWS

Answer: All connections to the power wash supply and power wash outlet shall be according to manufacturers recommendations.

74. Question: Drawing P-502. Sheet P-502 shows a detail for a spare air drop but none are shown. Please confirm is there are any of these required? How many and where are they located?

Answer: No spare air drops are required.

75. Question: Drawing P-112. There is a 3” domestic water line feeding the North platform in Area A to the water heater. From the water heater it is only showing a ¾” Hot water which runs throughout the whole building. Please clarify if this and should be 3” progressively getting smaller until the recirculation line connection.

Answer: See Amendment 0004, revised plumbing piping drawings for updated domestic cold and hot water pipe sizing: P112-115; P401; P501; P601; P903-904.

76. Question: Detail 2/C-502 shows filter fabric wrapping the sub-drain and overlapping at the top above the base course. Detail 7/C-501 does not indicate any filter fabric or geo-textile to separate the base course and drainage layers. Please confirm that the filter fabric is only required at the underdrain.

Answer: Filter fabric is only required at the underdrain drain locations.

77. Question: Detail A3 on drawing A-705 shows an interior finished window sill. There is no call out on the material or product to be used. Please advise.

Answer: See Amendment 0004, revised A3/A-705 for solid surface window stool.

78. Question: A-704 shows type W12 windows located in hanger door sections. A606 does not note the type of frames for these windows. We are finding the hanger doors contractors will not furnish this or the polycarbonate panels with the hanger doors, what types of frames are acceptable at this location?

Answer: See Amendment 0004, revised window type W12 on A-606 for Aluminum Storefront Windows at hangar door.

79. Question: On page T-401 of the drawings, circle A3 the fire rated pathway is showing on the northwestern corner of the H128 TR but on the overall Area A plan on page T-102 the cable tray runs along the south wall of the TR. Can the fire rated pathway be moved to the south wall to facilitate getting the cables into the TR where the cable tray terminated?

Answer: See Amendment 0004, revised Sheet T-401 for relocated sleeves. In addition, refer to revised Sheet T-601, for general telecommunications coordination modification.

80. Question: On page T-102 in the Tool Crib around H4 HE.5 (4) of the (6) dual wall cable drops will have a greater length than 295’ back to the H128 TR. The security camera on the exterior wall at HF-H6 will also be out of length. Would it be possible to add a small wall mounted cabinet with its own switch to accommodate drops in the tool crib? Please advise.

Answer: See Amendment 0004, revised Sheet T-102 for outlets removed.

81. Question: Where there is no cable tray will the EC be responsible for conduit from the drop back to the TR or will the conduit be only stubbed up above the ceiling tile level?

Answer: See Amendment 0004, revised Sheet T-501 for clarification of outlet conduits.

82. Question: Regarding modification required to the existing site water tank listed on drawing FX- 100, can you provide the following information: Is the existing tank a bolted or welded assembly?

Can you tell us the thickness of the exterior insulation wrap? Can you provide the name of manufacturer of this tank? Can the shop drawings of the existing tank be provided?

Answer: The tank is a welded steel tank fabricated and erected by Fisher Tank Company. The tank is not provided with an exterior insulation wrap. Shop drawings of the existing tank are not available.

83. Question: Please provide the hoist group number for the hoist required for this project.

Answer: Hoist group number statement unclear. Hoist requirements are indicated within Specification Section 41 22 23.19.

84. Question: Please confirm the cost for installation of the natural gas line feed to the building is not in the General Contractor’s Scope.

Answer: Cost associated with the installation of the natural gas infrastructure feed is not in the General Contractor's scope.

85. Question: Who is responsible for the wiring between the HR-2 in the top of the bay and the power source or is the power source going to be in the structure?

Answer: Question unclear and does not reference a Contract Document, therefore we have assumed the bidder is referring to the automatic hose reels for compressed air and breathing air shown as key note 7 on EP104 and keynote 9 on EP105. Contractor is responsible for furnishing and installing the automatic hose reel including all local grade level wall mounted switching controls and all conduit and wiring from the panel indicated on the plans to the final connection point of the hose reel shown above the bay, on the structure.

86. Question: Will Schedule 10 steel pipe be acceptable for all above ground wet-pipe sprinkler and HEF system piping greater than or equal to 2 1/2” in diameter?

Answer: Specification 21 13 25 Section 2.6 permits Schedule 10 pipe for pipe sizes 2-1/2” and larger for the HEF system. Specification 21 13 13 Sections 2.2 and 3.11 requires schedule 40 pipe for all piping on the wet-pipe sprinkler system.

87. Question: Detail B1/P501 notes an Earthquake Shut Off Valve. Will this be provided and installed by the Gas Utility Company or the Contractor? If by the Contractor, please provide additional information, requirements, and/or basis of design product for pricing purposes.

Answer: As defined in the Contract Documents, the earthquake valve is to be provided as part of the project, and shall meet the requirements listed in section 2.5 of Specification 23 11 23. An acceptable basis of design manufacture is the Firefighter AGV-200 valve.