Solicitation_Attachment_14_-_Q&A_Previous_Hangar_Solicitation.pdf

Attachment 14 Questions and Answers

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Question: Please provide equipment specifications for Power Wash Systems and outlets.

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.

Question: Drawing Sheet: P-106. Gas fired power wash units are shown and noted to be vented to a common header. These units are power vented and should be vented separately and not to a common header. Please confirm separate individual vents for each unit.

Answer: It is acceptable to route individual vents from each of the power washer units and terminate the vents at the louver, L-8. Refer to P106 and P401 A3.

Question: Provide foam testing containment requirements.

Answer: Per specification 21 13 25 sections 1.2.A, 1.4.E.6, 3.21.B.6.C and 3.22.5 require the contractor to submit a foam containment plan. Section 3.22.5 provides requirements for Facility and Environmental Protection requirements.

Question: Is it acceptable for discharged foam to be disposed through the hangar floor drains? If not will the foam be required to be disposed of while expanded, or can it be allowed to break down for a period of time prior to disposal? Provide foam disposal requirements.

Answer: Per specification 21 13 25 sections 1.2.A, 1.4.E.6, 3.21.B.6.C and 3.22.5 require the contractor to submit a foam containment plan. Section 3.22.5 provides requirements for Facility and Environmental Protection requirements.

Question: If they meet specification requirements. Can an alternate fire pump manufactures be utilized in place of ITT/A-C as shown on the FP drawings?

Answer: Yes. ITT/A-C was used as the basis of design, but pumps provided by other manufacturers may be utilized if they meet the performance requirements and substitution procedures in accordance with Spec Section 01 60 00.

Question: Trench drain model scheduled and indicated on drawing is available with 6” diameter end caps. Mechanical connections for ventilation duct are shown as 8”.

Is 6” ventilation duct under slab and transition to 8” above slab acceptable?

Answer: It is acceptable to run the exhaust duct at 6” below the slab to connect to the trench drain ends before transitioning up the 8” duct above the slab.

Question: Keynotes 6, 7 & 8 refer to control panels for exhaust hose reels, air hose reels and electric cord reels.

Are these control panels intended to control all reels individually from on location?

Please provide specifications for these panels and wiring schematic/diagram.

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Answer: All reels are to be individually controlled. Furnish and install one control switch per motorized reel in the one location shown on EP104. Control switches for each reel may be stacked in groups and be labeled with the identification of each reel, matching the label on the reel, which shall be readable from the floor.

Refer to specification 22 15 13-section 2.9.B for "Electric Automatic Remote Controlled Reels", specification 23 33 00-section 2.13.B4 for controller for Air Duct Hose Reels and specification 26 27 26-section 2.1.H for reversing switch under "Power Cord Reels" section.

Reel controls are an accessory component provided by the manufacturer and are typically reversing switches, similar to projection screens. Provide wiring as required by manufacturer.

Question: Please provide equipment specifications for Power Wash Systems and outlets.

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.

Question: M-101. The Equipment Schedule notes equipment to be Gov Furnished/Contractor Installed. To properly price and accommodate equipment needs, please provide Specifications and Installation instructions for the following items: Glass Bead Blaster, Plastic Media Blaster, Oven, Power Slip Roller, Power Brake, Power Shear, Do-All Band saw.

Answer: There are no equipment schedules on Sheet M-101.

Question: Please verify grout or 4500psi NW concrete is required at the hangar door rail block out per A1/S-511

Answer: The hangar door rail block out second pour indicated on A1/S-511 shall be made with 4500 psi concrete.

Question: Spec - 083613. The Sectional Door spec calls for the exterior face steel sheet thickness to be 0.064" (16ga.) with R-12 insulation foamed in place. The industry standard is a 20 ga. Steel sheet with an R-17 foamed in place insulation. Please confirm this is acceptable in addition to the 16 gauge, R-12 as specified.

Answer: Provide Sectional Doors as specified.

Question: C-505 and C-506. Construction Joint Detail – two types of bars specified - #4 bar on C-505 and 1” smooth bar dowel on C-506. Is it supposed to be a tied construction joint or load transferred doweled construction joint?

Answer: Construction joints located within the aircraft apron shall be constructed per detail 3 on sheet C-506. Construction joints located outside of the apron shall be installed per detail 4 on sheet C-505.

Question: CS102. The joint plan on CS-102 line "D" calls for Doweled Butt Joint. Please provide a detail for this joint.

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Answer: Provide doweled butt joint per detail 3 on sheet C-506.

Question: CU-101. Please provide a detail and/or manufacturer for the 5,000 gallon double-walled underground storage tank called out at key note number 21.

Answer: Refer to specification 2313 13 FACILITYUNDERGROUND STORAGE TANK for detail required of underground storage tank. Per paragraph 1.3.B of specification 2313 13, provide shop drawings of underground tank for review and approval.

Question: 08 36 20. Please confirm that a 3 button station is required for the sliding hangar doors.

Answer: Provide 3 button control box as specified and locate as indicated on drawing A2/A-704.

Question: 08 36 20. Please confirm that the Photoelectric Sensor in section 2.5.D.1 is required for the sliding hangar doors.

Answer: Yes, provide Photoelectric Sensor as specified.

Question: 08 36 20 Please clarify if section 08 04 00 - Blast Resistance is applicable to the section 08 36 20 - Hangar Doors. If not, please clarify what blast resistance is required for the hangar door system

Answer: The hangar is classified as Low Occupancy, therefore exempt from UFC 4-010-01 requirements.

Question: Door types show sectional doors to have one row of full view glass while the elevation drawings page A-201 doesn’tshow glass. Do sectional doors require any glazing? Are sectional overhead doors manufactured by Clopay Building Products acceptable for use on project provided they meet or exceed the specified products? Paragraph 2.12 A calls for a baked enamel or a powder coat finish. Do they want the manufacturer’s standard baked enamel finish or the optional powder coat finish available in 180 color choices?

Answer: Provide Windows in sectional overhead doors as indicated on B1/A-604 and specification section 08 36 13 - SECTIONAL DOORS, Paragraph 2.3,H. Provide Sectional Doors from an approved manufacturer as specified. For substitutions, see Section 01 60 00 paragraph 2.Contracting Officer will consider requests for substitution if received within 60 days after the Notice to Proceed. Proposals shall be based on the contract plans and specifications as posted. After award, the awarded General Contractor (GC) may submit a substitution request, but only per the substitution request process as defined in the Division 1 Specification Section (0160 00) describing that process. Both finishes are acceptable. Provide Manufactures standard of either finish.

Question: Drawing Sheet: P-106. Gas fired power wash units are shown and noted to be vented to a common header. These units are power vented and should be vented separately and not to a common header. Please confirm separate individual vents for each unit.

Answer: It is acceptable to route individual vents from each of the power washer units and terminate the vents at the louver, L-8. Refer to Sheets P-106 and P-401.

Question: Sheet FX-001 Note B references automatically opening doors below the foam generators.

This appears to be an open hangar what is this note referencing.

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Answer: This note is incorrect. The generators will be open to the hangar bay and will not have an automatically opening door. Refer to Sheet FX-001.

Question: Specification 01 10 00 – 5 para. 1.8 H states that the contract may use stockpiled spoils material located on the base. Does the owner have proctor or classification of this material? What is the proximity to the project site? May the contractor anticipate depositing any project generated spoils at this same location? Is there any cost associated with the use of these materials?

Answer: Stockpiled material is located approximate 0.85 miles from the project site when accessed through the base road network. Construction vehicles are not permitted to traverse across the aircraft apron when access the stockpile. The contractor is not to deposit spoils at this same location and there is no cost to use this material. Contractor shall be required to perform testing on borrow soil in accordance with specification 31 20 00, paragraph 1.4.B. Also, Section 01 01 00, summary.

Question: Drawing S-102, detail C4/S-511 at the hangar door does not show how the 6" slab ties into the foundation for the hangar door track. It appears there is a CJ on S-102, but please provide this detail.

Answer: See Section C4/S-511 and Section D1/S-512.

Question: Please verify the uneven grade utility pad is to have only two support walls per detail 1 on C-505

Answer: Yes, the Uneven Grade Utility Pad is intended to support a transformer being located on an embankment. The pad detail shall have four walls, supporting the square/rectangular pad on all four sides with step down footing on sides. See drawing C-505.

Question: One section of the concrete stairs is provided on C-502, but a section of the stair wall is not provided. Please provide and also indicate if a finish or precast cap is required.

Answer: Wall is to be 20-inch wide reinforced concrete, 18-inches high, with brick veneer to match building material. Provide a 40”x22”x3” stone coping with 1-inch overhang with drip edge. Detail of wall section has been added on Sheet C-502.

Question: C-505 and C-506. Joint sealant indicates a silicone sealant to be used on C-505, C-506 indicates to use “Preformed Elastomeric”, and the specifications indicate to use hot poured sealant.

Please clarify which one is correct. Will a silicone sealant be accepted in all cases?

Answer: Preformed elastomeric sealants are not required for this project. Cold-applied joint sealants, per specification 32 13 73, shall be provided within the concrete aircraft apron. Hot-applied joint sealants, per specification 32 13 73, may be applied at all other locations. See sheet C-506.

Question: 08 36 20 Section 1.2.D.1 states the hangar door wheels should be 3 inches. Section 2.2.E states that they should be 15 inches. Please clarify.

Answer: The hangar door wheel size in specification section 08 36 20, paragraph 1.2.D.1 has been revised to be 15 inch. See Specification Section 08 36 20.

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Question: Keynotes 6, 7 & 8 refer to control panels for exhaust hose reels, air hose reels and electric cord reels.

Are these control panels intended to control all reels individually from one location?

Please provide specifications for these panels and wiring schematic/diagram.

Answer: All reels are to be individually controlled. Furnish and install one control switch per motorized reel in the one location shown on EP104. Control switches for each reel may be stacked in groups and be labeled with the identification of each reel, matching the label on the reel, which shall be readable from the floor. Refer to specification 22 15 13-2.9 for Hose Reel Units, specification 23 33 00-2.13 for Air Duct Hose Reels and specification 26 27 26-2.1 for Power Cord Reels. Reel controls are an accessory component provided by the manufacturer and are typically reversing switches, similar to projection screens. Provide wiring as required by manufacturer. In addition, see Sheets EP-104 and EP-105.

Question: In reviewing the requirements for this project it appears that 4 pressure washers rated at 3000psi have been called out for wash duties. Per TM 1-1500-344-23-2 and T.O. 1-1-691, these units are far in excess of the allowable pressures that are to be used to clean aircraft. Claims that the wash wand has to be held a certain distance away from the airframe and at a given angle have proven to be an issue in the past and many locations no longer approve such units for washing of aircraft.

Will you allow other wash equipment which is purpose built for washing aircraft and is compliant with the TM and the TO?

Answer: Other wash equipment may be considered after award in accordance with Substitution procedures per Spec Section 01 60 00, and as long as it meets the design intent and all performance requirements shown in the Contract Drawings. However, as clarification, the basis of design (as indicated in the Contract Documents on Sheet P-601 - POWER WASH SYSTEM SCHEDULE) is not a 3000 psi rated unit.

Question: There is a time delay from the manual release button being pushed, the alarms, and the HiEx foam valve activating. When will the 3.28 foot HiEx foam depth timing start? Upon the alarms sounding, or at the time of the deluge valve activation

Answer: The timer for both the 90% aircraft silhouette coverage within one minute and the 3.28 depth of coverage within 4 minutes shall begin as soon as the system is activated. If a manual release station is used to activate the system, the timer will start as soon as the manual release station is pulled.

Performance requirements regarding the maximum time to achieve required depth of coverage are included in Specification 21 13 25 Section 2.1.

Question: Drawing A-573, details D1 and D2, show a concrete base for the lockers and 4" ground face CMU. The finish schedule on A-602 notes CWB-1 for the wall base. Please verify CWB-1 wall base is to be used, not 4" ground face CMU.

Answer: Provide base as scheduled at lockers. See sheet A-573.

Question: Many of the odd shaped concrete pavement panels are not shown as (*) Welded Wire Reinforced. Will all odd shaped panels require reinforcement or will only those identified on plan

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar sheet CS-102 be reinforced?

Answer: All non-rectangular sections of pavement shall require welded wire reinforcement. See sheet CS-102 for where welded wire reinforcement is to be placed.

Question: Detail 2, Sheet C-501 shows the 6” concrete pavement to be welded wire reinforced. The plans show the 6” rigid concrete aircraft pavement to only reinforce the odd shaped panels. Is all the 6” concrete to be reinforced or only those slabs shown on plan sheet CS-102?

Answer: Rigid concrete pavement for the aircraft apron shall be 12.5-inch thick concrete per detail 7 on sheet C-501, and noted on sheets CS-101 and CS-401. The 6-inch rigid concrete pavement with WWR is required at the access drives off of Hercules Blvd, as shown on sheets CS-101 and CS-401. Requirements for reinforcement of aircraft apron rigid pavement, per detail 7 on sheet C-501, is shown on CS-102. See sheet CS-102.

Question: There is a conflict between expansion joint seal details shown on sheet C-505 and C-

506. One shows preformed elastomeric and the other shows poured joint sealant. Which detail is to be used on this project?

Answer: Requirement for preformed elastomeric expansion joints has been withdrawn. See sheet C-506.

Question: Detail 8, sheet C-506 shows pavement tie-in details at the Hangar. Are the base layers under the pavement reversed from what is shown on detail 7, sheet C-501?

Answer: Aggregate base layers are to be remain consistent with detail 7 on sheet C-501. See detail 8 on sheet C-506(R1) for additional clarification.

Question: There is a conflict in dowel bar size. Sheet C-501, detail 7 says #9 x 20” @ 15” OC for 12.5” concrete. Sheet C-506 shows dowels 1” x 16” @ 12” OC. Plan Sheet CS-102, note 3 says 1-1/4” x 20” @15” OC. Which is correct?

Answer: Dowels shall be #9 rebar at 20-inches long and spaced at 15-inches on center, per detail 7 on sheet C-501. See detail 3 on sheet C-506(R1) and revised noted #3 on sheet CS-102.

Question: What dowel bar size should be used for the 6” rigid concrete pavement? None are shown in the plans.

Answer: Dowels for 6-inch rigid concrete pavement shall be ¾-inch diameter by 16-inches long, spaced at 12-inches on center. See detail 2 on sheet C-501.

Question: The pump house is shown on the joint layout drawing CS-102. This building is built on a footing foundation, which means the 12.5” concrete pavement will be poured up to the building foundation walls. This creates more odd shaped panels (and therefore, welded wire reinforced) around the building which are not shown on this plan sheet. It also does not show an expansion joint along the building foundation tie-in to the aircraft pavement. Please provide clarification and a detail for the joint around the pump house.

Answer: Per specification 32 13 13 ‘Concrete Paving’, paragraph 3.5.C, expansion joints are to be

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar located adjacent to concrete curbs, catch basins, manholes, inlets, structures, and other fixed objects.

See Sheet CS-102, for revised layout of WWR within the concrete pavement.

Question: Please confirm that the water supply to the fire pump house is direct from the existing water storage tank and nowhere else.

Answer: Yes, the water supply to the fire pump house is direct from the existing water storage tank. All tank scope items are shown on the FX plans.

Question: Please provide details on the existing water storage tank so it can be included in fire pump/hydraulic calculations. Please confirm the existing water tank is an elevated tank.

Answer: The existing water storage tank is a ground level tank. All known information have been indicated on the documents to include but not limited to the repair/enhancements scope as shown on FA-001. The Contractor shall be responsible to verify all existing site condition to provide a complete and usable system in accordance with the Contract Documents.

Question: Section 21 31 13. The fire pump specification limits the motor to 450 HP while the fire pump drawing (FX-112) states motor to be 500 HP. Please confirm which is correct.

Answer: The maximum permitted horsepower for the fire pump is 500 hp. See Specification section 21 31 13.

Question: FX-100. On the drawings the fire hydrant line and fire supply line to the hangar just outside of the fire pump house are very close/overlaid and difficult to determine if there are any connections.

Please confirm the fire hydrant line is not connected to the fire pump supply to the new C17 Hangar or to the future hangar.

Answer: The fire hydrants are served by the base water supply which is separate from the fire pump house supply.

Question: Where is the stockpile for excess material located that is referenced in the specifications?

Section 31 20 00 3.22

Answer: The stockpile for borrow material is located west of Building 50, at the north end of the North Carolina Air National Guard aircraft apron. The travel distance from the stockpile to the project site is approximately 0.85 miles.

Question: Where is the spoil stockpile we may utilize for borrow material referenced in the specifications? Section 01 10 00 1.8 Item K

Answer: The stockpile for borrow material is located west of Building 50, at the north end of the North Carolina Air National Guard aircraft apron. The travel distance from the stockpile to the project site is approximately 0.85 miles.

Question: What quantity of material from the spoil stockpile could we anticipate for borrow material referenced in the specifications? Section 01 10 00 1.8 Item K

Answer: Approximately 2,000 cubic yards of spoil material from a separate project located at the North

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Carolina Air National Guard will be available at the stockpile location for potential use at the project site.

Contractor shall be responsible for performing testing of borrow soil in accordance with specification 31 20 00, paragraph 1.4.B. to ensure material is suitable for reuse at the project site.

Question: In discrepancies between architectural drawings and equipment drawings, do the equipment drawings trump? For example, the Fall protection on A-125 shows fall protection running the same direction as the fuselage system where as Q-101 shows the stabilizer systems at an angle.

Answer: Provide fall arrest as shown on Q-101 and Q-301 and as identified on Sheet Q-601. See sheets A-121 and A-125.

Question: Section 11 24 29. Do fall arrest systems with two lanyards attached need to have bypass capabilities/a two track system? Or can detaching and re-attaching functions suffice?

Answer: Bypass capability is not required on fall arrest tracks. Two tracks with two lanyards each are required above the fuselage as shown on drawing Q-101.

Question: On dwg FA-111, room TER S112 is missing a smoke detector. Please verify this is correct.

Answer: Yes, a smoke detector should be provided in TER S112. See sheet FA-111.

Question: On dwg FA-111, vestibule S101 has a symbol for GAP. Please indicate what this is.

Answer: The "GAP" referenced in Vestibule S101 on drawing FA-111 should be a "ANN". This is a remote LCD type annunciator. See sheet FA-111.

Question: On EP111, key note 23 is used for various areas with demountable partitions. However, there is no A-111A architectural drawing do not indicating demountable partitions for the Simulator building. We assume key note 23 does not apply. Please verify.

Answer: Key note 23 on Sheet EP111 shall apply as part of the OLI. Refer to updated Architectural drawing that reflect the demountable partition OLI requirements. See Sheet A-111.

Question: Dwg T102 shows basket tray extending from area A to area B. However, dwg T103 does not show the continuation of basket tray in area B. Please indicate rest of basket tray.

Answer: Cable tray from Area A to Area B shall extend into Corridor H135 as indicated on sheet T-103.

Question: Spec 263226, part 2.3A lists MIL-STD-704E as the current standard. We assume that MIL-STD-704F is the current standard. Please verify.

Answer: Refer to Specification 26 32 26, section 2.2A and 2.3A. MIL-STD- 704E has been revised to

MIL-STD-704F.

Question: Spec 263226, part 2.4B, 1 & 2, identify a specific manufacturers cable part number. We assume an or equal product wil be allowed as there is no sole source justification in the bid documents for this item. Please verify.

Answer: Per section 2.1.B Alternate Manufacturers may be incorporated. The cable is an associated component and shall be from the single manufacturer as specified in section 2.1.C "Source

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Limitations".

Question: Spec 263226, part 2.6K, 1.a.5 - Overload/Overcurrent is showing 300% capacity for six seconds. We assume a 200% overload rating will be allowed to comply with the reduction introduced by NAVFAC Northfold VA citing safety reasons (per UFGS 263543 spec mod). Please verify.

Answer: Provide "300% 6 seconds" overload capacity per Specification 26 32 26-Section 2.6.K. 1.5.

Question: Spec 263226, part 2.6, R - Since the converter for this project will be installed in a stand alone usage and will not require parallel operation, we assume that the unit will not require this Automatic Parallel Operation feature. Please verify.

Answer: Refer to Specification 26 32 26 - FREQUENCY CONVERTER UNITS. Section 2.6.R "Automatic Parallel Operation" has been deleted.

Question: Spec 263226, part 2.11, I - Painted Color cites a FED-STD-595C gray color 26173. We assume that a manufacturer's standard RAL gray color will be acceptable. Please verify.

Answer: Provide FED-STD-595C gray per specification 26 32 26, section 2.11-I.

Question: Dwg Ep104, note 13 indicates a motorized cord reel with 100 foot cord. Please provide spec for cord reel. Please indicate if cord reel is to be provided with a remote operator station.

Answer: Refer to specification 26 27 26-"WIRING DEVICES" section 2.1 "Power Cord Reels" for cord reel spec and section 2.1H for remote reversing switch.

Question: Dwg EL107 has a note indicating "typ for 45 fixtures". However, there are only 40 H1 fixtures shown. We assume that the note applies to the count of fixtures actually show. Please verify.

Answer: Note adjacent to keynote 1 on drawing EL107 revised to "TYP OF 40". See Sheet EL107.

Question: Dwg EL102 & EL103 shows fixture type D in the bathrooms as an emergency fixture.

However, the fixture schedule does not indicate type D to have a battery backup. We assume battery backup will be required for these fixtures. Please verify.

Answer: Fixture Type D has been revised to type DE and provided with emergency battery backup.

Note-Simulator restroom Type D fixtures also updated to Type DE. Refer to drawings EL102, EL103, EL111 and E-701.

Question: Please confirm the response time is correct for section 1.4 of the Frequency Converter specification. 1.4 QUALITY ASSURANCE; A. Manufacturer Qualifications: A qualified manufacturer.

Maintain a service center capable of providing training, parts, and emergency on-site repairs in less than eight hours' maximum response time. Emergency repairs in less than 8hrs is not reasonable.

We request the ANG have spare parts in stock and we train on standard repairs per the training section of the specification. We request the acknowledgement of a request for support within 48hrs and a repair by one of our techs if needed within 5days of the acknowledgement.

Answer: See Specification 26 32 26, Section 1.4 revised to provide training as outlined in section 2.14. Provide parts and emergency on-site repairs within 5 days of acknowledgement.

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

Question: Ref Specification Section 08 36 20 from Amendment #6 Section 08 36 20 para 2.1-A lists acceptable manufacturers for hangar door systems. We believe there are additional competent and qualified manufacturers with extensive experience on military aircraft hangar installations that have been omitted from this list. Please confirm or clarify if the Government will accept any qualified manufacturers that are not included in this list.

Answer: Refer to 08 36 00, Section 2.1.A. In addition, yes - See Section 01 60 00 paragraph 2.2.

Contracting Officer will consider requests for substitution if received within 60 days after the Notice to Proceed. Proposals shall be based on the contract plans and specifications as posted. After award, the awarded General Contractor (GC) may submit a substitution request, but only per the substitution request process as defined in the Division 1 Specification Section (01 60 00) describing that process.

Question: Section 32-13-13 Concrete Paving, Part 2.3 & 3.4 of the Specifications calls for reinforcement (Dowel bars, welded wire reinf.& ties) to be zinc-coated. Can the zinc coated requirement for the rigid pavement welded wire reinforcement and ties be eliminated? Can the dowel bars be red painted or epoxy coated, instead of zinc-coated?

Answer: Requirement for zinc coated reinforcement within the concrete pavement was incorporated into the design to guard against deterioration of the rebar due to water infiltration. Please provide zinc coated reinforcement as specified in paragraphs 2.3 and 3.4 of specification 32 13 13 Concrete Paving.

Question: Reference 41 34 23.33. What is the load capacity of the product grating at the floor of the painting booth? Right now we have assumed 125 lbs/sf

Answer: Floor grating to be 125 psf minimum load rating. Refer to Spec Section 41 34 23.33.

Question: Is the intention to reduce the sound traveling through the hangar doors (and if so can the 2"" Versawall on the outer face of the hangar door count toward the end result)? Or is the intention to reduce (absorb) some the noise created within the hangar space? I believe the L2-2 is installed fastening from the back side however this will not work for the project. The panels must be installed from the interior face side so a panel like the L-21A however the L-21A is only 1.5"" deep.

Would you accept this? Also, a concern I might have with QuiteWall is how much moisture will the perforated liner see? We can only manufacturer liner panels in G90 steel, and the holes could rust when they're perforated. This could be a concern if these hangar doors are going to be opening/closing a lot and exposing the liners to moisture.

Answer: Provide metal wall panels as indicated on drawing A-704 and specification section 07 42

13.13 – FORMED METAL WALL PANELS.

Question: Q-601, The Equipment Schedule notes equipment to be Gov Furnished /Contractor Installed. To properly price and accommodate equipment needs, please provide Specifications and Installation instructions for the following items: Glass Bead Blaster, Plastic Media Blaster, Oven, Power Slip Roller, Power Brake, Power Shear, Do-All Bandsaw.

Answer: The following components are ‘existing’ components that are located within the existing

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

NCANG Charlotte-Douglas ANGB installation (that are to be relocated to this new Hangar project). All available information has been provided, and infrastructure/utility requirements (Electrical, air, etc) are shown on the Contract Documents. If Bidders require more information, refer to Spec Section 01 10 00

– SUMMARY, Section 1.8.H – which states: “…it will be the Contractor’s responsibility to fully and carefully evaluate drawings and jobsite conditions prior to submitting the bid proposal.”

- Power Slip Roller

- Power Brake

- Power Shear

- Do-All Bandsaw

The following components (to be Government furnished) is being provided as a courtesy only for basis of design purposes and as final procurement of items (by Govt) has not occurred. Note it shall still be the responsibility of the general contractor to coordinate installation, to include but not limited to, providing all utility/infrastructure requirements (as defined on Q-601) for the installation of a complete and usable system (based on the final procured equipment).

- Oven: Model P650HVG624 direct gas fired composite curing oven as manufactured by EPS – Engineered Production Systems.

- Glass Bead Blaster and Plastic Media Blaster: Model “Pulsar IX” (both) as manufactured by Clemco and supplied by Metal Prep.

Question: Spec 263226 was revised by Amd 7 which deleted the requirement for automatic parallel operation (2.5-R). However, part 2.8-A.6 still includes a display of master/slave indication. We assume that this will now be deleted. Please verify.

Answer: Section 2.8-A.6 has been deleted. Refer to Specification 26 32 26.

Question: Spec 263226 part 2.6-B indicates that the unit is to be a dual output. The drawings show that the overall size of the unit is to be 120 kva. Please indicate how the kva is to be split between the 115/200 VAC and the 230/400 vac outputs that would total 120 kva.

Answer: Provide the 100 kW power rating at the user selectable 200 or 400 VAC output. Specification 26 32 26 section C specifies a 100 kW size unit which equals 125 kVA at 08. PF and not 120 kVA. Drawing EP104, note 10 refers to the specification 26 32 26 and does not specify a kVA rating. Drawing E-601 single line also does not note a kVA size. Drawings do not show the overall size to be 120 kVA as stated in the question.

See specification 26 32 26 to include additional clarification including the kVA rating at the voltage requirements.

Question: Is Section 09 91 13 Exterior Painting applicable to the Hangar Area?

Answer: No. Refer to Interior Painting Spec 09 91 23 for Hangar area.

Question: The specs do not call out if the electrification should use "trolley duct" or "draped SO

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar cable”. Please advise.

Answer: If referring to Hangar Doors, provide a trolley duct system. See Specification 08 36 20.

Question: In the PLANS, Under "Structural General Notes" the GCpi is set at +/- 0.55 for the Hangar Bay. Can GCpi = +/- 0.18 be used for the Hangar Door design since the door is too be closed at the storm rated winds? The higher GCpi number assumes the door is open during the Code rated wind event. L/360 over 64 feet span is excessively stiff. These doors are specified as receiving metal panels which is a very flexible material. L/120 is all that is required by Table 1604.3 of the IBC (exterior walls with flexible finish). Please advise.

Answer: Hangar door components shall be designed to resist the Component and Cladding Wind loads per Part 3 of Chapter 30 of ASCE7-10 in accordance with the Building Code, as referenced by UFC 1-200- 01 and UFC4-211-01. Design shall incorporate provisions for Partially Enclosed Buildings (GCpi = +0.55).

See Spec section 08 36 20 - HANGAR DOORS for amended deflection criteria.

Question: States “Provide automatic jamb latches that activate when door is fully closed.” My understanding is this is a conflict. It’s not a bottom rolling door feature. This is something you see on a vertical lifting bi-fold door. Please advise.

Answer: Automatic jamb latches are not required. See Spec section 08 36 20 HANGAR DOORS. .

Question: What do you mean by “corrosion resistant”? Does that mean Stainless Steel, Galvanized or possibly painted with a Zink rich primer. We have used the Zink Rich Primer paint before and it does pass for being corrosion resistant in some applications. It also works better than the galvanizing because it isn’t as thick so the machined parts fit together better. Please advise and provide minimum specs if necessary.

Answer: If referring to Spec Section 08 36 20, the intent of paragraph 2.4.A is to establish that the door hardware is required to be corrosion resistant while providing different material options for the hangar door manufacturer. Proceed as specified.

Question: Discipline: Concrete Paving. Inquiry: Per Addendum #7 Sheet C-506 Detail 2 and 3 states “NO. 9 REBAR @ 15” O.C. PAINT & GREASE EXPOSED END OF DOWEL”. “Rebar” is not a “smooth bar dowel”, nor intended to be load transfer device, and it is usually classified to be a # (size) designation. Please clarify that the intent is to utilize a smooth painted/greased dowels 1-1/8” x 20” @ 15” O.C. for all of the contraction/construction joints?

Answer: Provide 1-1/8" x 20" Smooth Bar Dowels at 15" O.C. and grease exposed end of dowel for joints located within the aircraft apron rigid concrete pavement and as shown on sheet CS-102 JOINT LAYOUT

PLAN.

Question: Discipline: Structural and Hangar Door. Inquiry: In the PLANS, Under "Structural General Notes" the GCpi is set at +/- 0.55 for the Hangar Bay. L/360 over 64 feet span is excessively stiff. These doors are specified as receiving metal panels which is a very flexible material. L/120 is all that is required by Table 1604.3 of the IBC (exterior walls with flexible finish). The higher GCpi number assumes the door is open during the Code rated wind event. Can

Previous Solicitation Number W91242-18-R-0001 C-17 Corrosion Control and Fuel Cell Hangar

GCpi = +/- 0.18 be used for the Hangar Door design since the door is too be closed at the storm rated winds?

Answer: Hangar door components shall be designed to resist the Component and Cladding Wind loads per Part 3 of Chapter 30 of ASCE7-10 in accordance with the Building Code, as referenced by UFC 1-200- 01 and UFC4-211-01. Design shall incorporate provisions for Partially Enclosed Buildings (GCpi = +0.55).

Refer to Spec section 08 36 20 - HANGAR DOORS for amended deflection criteria.

Question: Discipline: Hangar Door. Inquiry: Do we provide automatic jamb latches that activate when door is fully closed? It’s not a bottom rolling door feature. This is something you see on a vertical lifting bi-fold door or something similar

Answer: Automatic jamb latches are not required. See Spec section 08 36 20 HANGAR DOORS.

Question: Discipline: Hangar Door. Inquiry: In section 2.4A of the hangar door spec, what is the intent for “corrosion resistant?” Does this mean stainless, galvanized or zink rich primer?

Answer: The intent of paragraph 2.4.A is to establish that the door hardware is required to be corrosion resistant while providing different material options for the hangar door manufacturer. Proceed as specified.

Question: Discipline: Hangar Door. Inquiry: The hangar door spec does not mention explosion proof motors. Please confirm this door does not require them. If the door should use explosion proof motors, please provide the requirements.

Answer: The motor and all electrical components need to be listed for a wet location. If the motor is located within 18" of the floor, the motor would also need to be listed for Class 1, Div. 2. See Specification 08 36 20.

Question: Discipline: Hangar Door. Inquiry: The hangar door spec references photoelectric sensors used on vertical lifting doors. Should we include a typical 4-wire sensing edge on a leading edge of a motorized door?

Answer: Use the appropriate photoelectric sensor as required to meet specification 08026020 section 2.5.D. All electrical components need to be listed for a wet location. If the sensor is located within 18" of the floor, the sensor would also need to be listed for Class 1, Div. 2. See Specification 08 36 20.

Question: Discipline – Hangar Door. Inquiry: In division 08.36.20 should we use trolley duct or draped cable for electrification?

Answer: Provide a trolley duct system. See Specification 08 36 20.