Amendment 5_with RFIs 3 5 6 and 11.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE PAGE OF PAGES

LAW ATCT project at Lawton, OK N/A 1 18

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

0005 7/25/25 TBD

6. ISSUED BY 7. ADMINISTRATED BY (If other than Item 6)

Federal Aviation Administration

ATTN: AAQ-550

1200 District Ave Burlington, MA 01803

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

Offeror: Please fill name and address here:

9A. AMENDMENT OF SOLICITATION NO.

697DCK-25-R-00367

9B. DATED (SEE ITEM 11)

6/30/25 (solicitation date)

10A. MODIFICATION OF CONTRACT/ORDER NO.

*TO BE COMPLETED BY VENDOR IF NOT COMPLETE 10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is: extended is not extended.

(a) By completing Item 8 and 15, and returning 2 copies of the amendment; (b) acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDG- MENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hours and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS, IT MODIFIES THE CONTRACT/ORDER NO.

AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT/ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

.See Block #14 E. IMPORTANT: Contractor is not, is required to sign this document and return 1 copy to the issuing office.

14. Amendment #1 issued to incorporate the following:

1. Solicitation Amendment 0005 issued to incorporate RFI’s #3, 5, 6, and 11.

2. Solicitation Amendment 0005 issued to add/incorporate the following new and/or revised documents into Section J

Attachments:

a. Site 5 Updated NRA Determination Letter

b. LAW ATCT Equipment

c. IFB Addendum 1 Change Log

3. The Solicitation’s closing date is not being extended at this time, and remains 5:00PM (ET) on 7/30/25.

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

Robert K. Higgins.

15B. CONTRACTOR/OFFEROR 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

(Signature of person authorized to sign)

BY

(Signature of Contracting Officer) 7/25/25

INSTRUCTIONS

Instructions for items other than those that are self-explanatory, are as follows:

(a) Item 1 (Contract ID Code). Insert the contract type identification code that appears in the title block of the contract being modified.

(b) Item 3 (Effective date).

(1) For a solicitation amendment, change order, or administrative change, the effective date shall be the issue date of the amendment, change order, or administrative change.

(2) For a supplemental agreement, the effective date shall be the date agreed to by the contracting parties.

(3) For a modification issued as an initial or confirming notice of termination for the convenience of the Government, the effective date and the modification number of the confirming notice shall be the same as the effective date and modification number of the initial notice.

(4) For a modification converting a termination for default to a termination for the convenience of the Government, the effective date shall be the same as the effective date of the termination for default.

(5) For a modification confirming the contracting officer's determination of the amount due in settlement of a contract termination, the effective date shall be the same as the effective date of the initial decision.

(c) Item 6 (Issued By). Insert the name and address of the issuing office. If applicable, insert the appropriate issuing office code in the code block.

(d) Item 8 (Name and Address of Contractor). For modifications to a contract or order, enter the contractor's name, address, and code as shown in the original con- tract or order, unless changed by this or a previous modification.

(e) Items 9, (Amendment of Solicitation No.- Dated), and

10, (Modification of Contract/Order No.- Dated). Check the appropriate box and in the corresponding blanks insert the number and date of the original solicitation, contract, or order.

(f) Item 12 (Accounting and Appropriation Data). When appropriate, indicate the impact of the modification on each affected accounting classification by inserting one of the following entries:

(1) Accounting classification Net increase $

(2) Accounting classification Net decrease $

NOTE: If there are changes to multiple accounting classifications that cannot be placed in block 12, insert an asterisk and the words "See continuation sheet."

(g) Item 13. Check the appropriate box to indicate the type of modification. Insert in the corresponding blank the authority under which the modification is issued. Check whether or not contractor must sign this document.

(h) Item 14 (Description of Amendment/Modification).

(1) Organize amendments or modifications under the appropriate Uniform Contract Format (UCF) section (if UCF used) headings from the applicable solicitation or contract. The UCF table of contents, however, shall not be set forth in this document.

(2) Indicate the impact of the modification on the overall total contract price by inserting one of the following entries:

(i) Total contract price increased by $

(ii) Total contract price decreased by $

(iii) Total contract price unchanged.

(3) State reason for modification.

(4) When removing, reinstating, or adding funds, identify the contract items and accounting classifications.

(5) When Template 11 is used to reflect a determination by the contracting officer of the amount due in settlement of a contract terminated for the convenience of the Government, the entry in Item 14 of the modification may be limited to -

(i) A reference to the letter determination; and

(ii) A statement of the net amount determined to be due in settlement of the contract.

(6) Include subject matter or short title of solicitation/ contract where feasible.

(i) Item 16B. The contracting officer's signature is not required on solicitation amendments. The contracting officer's signature is normally affixed last on supplemental agreements.

RFI #3 Responses

7/18/25

RFIs

1. Question: please clarify if we need to follow the door hardware schedule 087100, or follow the Y series drawings?

• Division 08 Door Hardware, 087100, Door Hardware Schedule – Scheduled Doors. The door hardware schedule shows the following doors with either access control or a door contact only door. 004.1, 007.1, 008.1 (Door Contact Only), 010.1, 011.1, 012.1, 1004.1, and 1002.1.

• Access control drawing shows 004.1 (y100) and door 1002.1 (Y105) as the only two doors with access control on the tower.

. 1- Door hardware schedule (08 71 00) has been revised to match Y-series.

004.1 - card access + door contacts

007.1 - door contacts

008.1 - door contacts

010.1 - door contacts

011.2 - door contacts

012.1 - door contacts

1004.1 - door contacts

1002.1 - card access + door contacts

2. LAW-D-ATCT-C931, Detail drawings do not show an exit reader or keypad. Is there a requirement for pedestal, back box, intercom, and keypad for the exit side of the gate, or is it a free exit?

It is a free exit.

3. Gate contractor providing the Knox Box pedestal, back box, connections to the gate, and Knox Box itself, or security integrator?

.For this project the security system is being provided and installed by the General Contractor, there is not a separate FAA security integrator. The division of work amongst the subcontractors is the General Contractor’s responsibility.

4. Who is providing and installing the strike lock? (LAW-D-ATCT-C761 Detail 3)?

. The General Contractor

5. The pedestrian gate is not referenced on the Y drawings. is this to be part of the access control system?

. Yes, the pedestrian gate receives a combination reader/keypad on the public side and exit push button on the FAA side. See C931 detail 1.

6. C931 detail 1 shows a reader (Public Side) and an Exit Push Button (FAA Side). C975 Detail 4 shows a reader and a push button. C982 Detail 1 TAG ACR3/ACR4 indicates card reader for entry and exit along with a “DEVI 'PEDESTRIAN GATE EXIT SWITCH' [EXTERIOR ENTRY GATE AREA]”. Is it two readers, one reader, and a request to exit button, or some other configuration?

. The configuration is as shown on C931 Detail 1. A combination reader/keypad on the Public side and an Exit Push button on the FAA side.

7. Who is providing the 4” Square Heavy Duty Bollard Style Pedestals at the pedestrian gate?

. The General Contractor.

8. Gate contractor providing the Knox Box pedestal, back box, connections to the gate, and Knox Box itself, or security integrator?

. .For this project the security system is being provided and installed by the General Contractor, there is not a separate FAA security integrator. The division of work amongst the subcontractors is the General Contractor’s responsibility.

9. LAW-D-ATCT-Y000, General Security Notes 8: Is this part of Airport wide system or stand-alone?

. This is a stand alone system.

10. LAW-D-ATCT-Y000, General Security Notes 8: If part of a Airport wide system are we to support the Airports VMS, VSS, and ACS software for 5 years?

. Not applicable.

11. LAW-D-ATCT-Y000, General Security Notes 8: If part of an Airport wide system and not stand-alone, what is the currect Software House system ID for licensing purposes?

. Not applicable.

12. LAW-D-ATCT-Y000, General Security Notes 8: If Stand-alone can the Security Integrator propose a different access control solution as an equal or better?

. Yes, a substitution request must be submitted for FAA approval.

RFI #5

1. Page one of the RFP denotes that the period of performance is 542 calendar days but is negotiable. Under the Factor 5 Construction Schedule requirements on page 85, “The schedule must show completion within the period of performance indicated in this solicitation but may demonstrate a logical early finish.” Also, Paragraph B.4 Contract Term furthermore limits working hours to 40 hrs per week. Please confirm if contractors are required to provide a 542 calendar day period of performance working 40 hrs per week, or ,if the proposed schedule exceeds 542 calendar days utilizing a 40 hr per week schedule that would be acceptable.

Any Schedule submitted would have to be approved by the FAA, whether at 542 calendar days or otherwise, and any schedule submitted other than for the 542 will need to have an accompanying narrative explaining all reasons why an offeror is proposing an alternate Period of Performance. Also, since Schedule is one of the evaluated criteria, a longer proposed Period of Performance may not yield a favorable evaluation.

2. Refer to geotechnical report indicating water table at 12 to 20 feet beneath ground surface.

Top of slab is indicated to be 0’-0”, Top of Mat is -3’-0” making bottom of mat -7’-0”, - 2’-0” of cut and structural fill equals 9’-0” below finish floor to bottom of fill. Detail 1/S410 indicates to prepare swelling subgrade to control swelling of soils, Ref note 1. It is unclear reading the note and the geotechnical how this subgrade should be prepared. Of more concern would be that this work could be getting into water table depending on depth and add significant costs for dewatering and possibly a well point system. Please advise.

. The Contractor should monitor groundwater levels prior to construction to determine depth to groundwater, and if those depths may impact construction.

Dewatering may be necessary to maintain the groundwater levels to no shallower than 2-feet beneath the excavation depths. Based on the relatively low permeability of the soils and the anticipated groundwater conditions from the geotechnical exploration, groundwater seepage may take a relatively long time to enter an excavation that is extended to or below that groundwater surface.

The methods used to address the swelling soils encountered at the site should utilize a combination of moisture control and removal and replacement methods.

Removal and replacement methods are where the swelling soils are removed and then replaced with a Low Volume Change Material (LVCM), or replaced with the chemically treated soils (e.g. by amendment of the soil with lime, cement, or fly-ash). An LVCM can include well-graded crushed stone, flowable fill, or lean concrete. If a well-graded crushed stone is selected as an LVCM, it will need to be graded to drain towards a sump, graded to drain and be daylighted to discharge in an area that will not promote swelling of soils, or gravity drained to a storm sewer system. The use of flowable fill or lean concrete as an LVCM may be practical in areas where proper moisture control may be difficult to maintain after the excavation is made, or where the base of the excavation has become soft or unstable.

If the LVCM is comprised of soil, appropriate materials must be placed and compacted in accordance with the geotechnical report recommendations. If the LVCM is comprised of flowable fill or lean concrete, a minimum 28-day compressive strength of 300 psi is recommended. Please refer back to the geotechnical report for further information on encountered subsurface conditions and geotechnical recommendations.

Contractor is responsible for designing a dewatering system based on the information provided in the geotechnical report. See specification 31 20 00 Earthwork. Refer to Geotechnical report section 5.1.4.1 for subgrade protection.

Specification 31 20 00 has been amended to add specifics regarding “mud mat” requirements.

3. Sheet FA100 indicates that there are separate panels, 1 for stair pressurization and one for elevator pressurization. Sheet FA003 indicates that these are 1 panel. Please clarify if they are to be separate or combined.

. The design intent is one panel with controls for both the stair and elevator pressurization. The space held for the panels on FA100 will be used by the larger single panel.

4. Sheet FA003 smoke control panel detail does not indicate status LED indicators for the damper or fan status. The damper and fan wiring diagrams indicate the fire alarm are to monitor these items. Should this be indicated on the smoke control panel(s).

. The START/STOP/AUTO switches on the panel have LED light which will indicate the status of the fans and dampers. For example, when the switch for a stair pressurization fan is flipped to the “ON” position once the unit is activate the green LED under the “ON” label should illuminate green for positive confirmation. Where several dampers are associated with a single fan the status and control for all dampers shall be grouped in a single switch. For example, if there are three dampers associated with an elevator pressurization fan if all three dampers are commanded closed and achieve that position the red “CLOSED” LED shall illuminate. If any of the three dampers fail to achieve the commanded position the orange “FAULT” LED shall illuminate.

5. Sheet FA100 indicates a fire alarm control panel with intergraded smoke control. The specifications indicate that these should be separate panels. There is a detail for the pressurization for stairwell and elevator one Sheet FA003 which is called a smoke control panel. There are many other smoke control fans and dampers that are called out to be controlled. Is there a 3rd smoke control panel or is it part of the fire alarm panel. Is it to be graphical and is there a conceptual layout of this smoke control panel?

.The controls indicated within the FACP are for post event smoke purge (post fire smoke purge) of the main areas on the occupied floors. This is different from the active smoke control panels (stair and elevator pressurization), which are intended to be a separate panel.

6. Sheet FA100 and FA106 show UPS and Generator panels. Are these separate panels from the fire alarm panel? Are they provided by the fire alarm contractor or the associated contractor for the generator and UPS? The specification seems to indicate we are to provide these panels.

. These are intended to be separated from the fire alarm system, but live adjacent to the fire alarm panels. The fire alarm contractor is responsible for coordinating with the CM and associated contractor(s) to provision for space and installation of the above referenced panels.

7. (28 31 00) Specifications 2.3 B state SLC, IDC, and NAC circuits shall be Class X. Class X is only applicable to SLC circuits. Other places indicate circuits should be Class A. Is all wiring to be Class A?

. Notification appliance circuits are permitted to be class A. The FAA design standards require the “network fire alarm pathways” to be Class X. This standard shall be followed unless otherwise approved by the FAA.

8. (28 31 00) The SLC circuits are shown to have 2 isolator modules per floor indicating Class A wiring, but Class X would require an isolation module between every device. Are we to provide Class X or Class A wiring for SLC circuits?

. The FAA design standards require the “network fire alarm pathways” to be Class X.

This standard shall be followed unless otherwise approved by the FAA.

9. (28 31 00) Specifications 2.3 D and E indicate each floor should have its own NAC and SLC, but the riser diagram indicates Class A loop across multiple floors. Are we to have a circuit per floor per specifications?

. The SLC loop is permitted to span multiple floors. The NACs shall only serve a single floor.

10. (28 31 00) Specifications 2.8 indicate we are to have Data Gathering Panels with a minimum of 1 per 3 floors. The riser diagram only indicates 1 fire alarm panel. Are we to provide DGP in the project? This would require a minimum of 4 panels.

. The current design intent is to have a single FACP where possible. DGPs are not required, if the contractor deems a DGP(s) is required to accomplish the design they shall be provided as required.

11. The Sheet FA000 seems to indicate all fire alarm cabling must be installed to meet 2 hr. fire rating which would require 2hr. CI cable in conduit or in a 2-hour enclosure. Is all fire alarm cabling to be 2 hr. rated or would this just be riser cable and cable between floors? Would all other cables be acceptable within the floor to be fplp as indicated” for all locations including but not limited to”?

. The design intent is not to have 2-HR rating throughout the entire building.

Traditional FPLP (after review and approval) cable is acceptable for use.

12. Can you please confirm what Original Equipment Manufacturers and Product types are included in these specifications?

. The specification is performance based and does not specify product models. It’s up to the contractor to choose the appropriate product that meets the intent of the specification. The product/model along with any exceptions or clarifications will be spelled out in the elevator contractor’s bid.

13. The grading and drainage plan (sheet C200) does not appear to have sufficient fall to be paved with asphalt. Elevation 1097.46 to elevation 1097.36 is approximately .64 feet.

Standard slope is 1” per 10’ to prevent ponding. Please confirm these elevations and slopes are correct.

. The parking lot cross slope was adjusted to assist with constructability and avoid “bird baths”.

14. What are the reporting requirements for the partial air leakage test of the Console and Cab levels (01 91 13.43.A, paragraph 3.5-A-1-a)? Is a full report required, or can it be deferred to the final testing report?

. Recommended to provide a draft Report following the air leakage test.

15. Spec sections 07 27 13 and 07 27 26 both describe inspections and testing for adhesion and air leakage. It is not clear from the drawings where fluid-applied air barrier will be used vs self-adhered air barrier. Are these sections provided as options for the contractor to use whichever material is preferred, or are these materials used in different areas? Will inspections and testing be required for both systems or just for whichever system is selected?

. Both are required, we have fluid applied vapor impermeable membrane globally. At one condition we have sheet applied vapor permeable – at the cab sill. Callouts will be updated in 3 Details. Foil faced mineral wool will be added to 072100.

16. 07 27 26, paragraph 3.6-C-2 states a total of three tests shall be performed at the trial installation and at 25, 50, and 100% completion (four milestones), while paragraph 3.6-C-3 lists trial installation, 50, and 100% completion (three milestones). Are four adhesion tests required, or is “25% completion” intended to be synonymous with the “trial installation”?

. Note also that subparagraph (2) refers to ASTM D4541, adhesion. Subparagraph (3) refers to ASTM E 1186, Air Leakage / Bubble Gun. Note also that ASTM D4541 will be updated to ABAA.

17. (23 05 93) "The test procedure outlined in the Specifications are for filters that are accessible to scan downstream but it doesn’t look like these filters will be accessible to scan. Specification 3.2 C and D indicates that the filters are to be scanned and to identify any points of leakage that exceed 0.01%.

Specification Section 3.2 A, states that “filter testing is intended to be completed in a similar manner to industry standards for certification of HEPA filters in biological safety cabinets”.

The industry standard, for filter banks that are too small to get inside and close the door so that we can scan downstream, is to probe the downstream duct with a traverse of the duct area and the acceptance criteria is for no point to exceed 0.005% of the upstream challenge concentration.

We can meet the statement in Part A by probing the duct downstream of the filters in accordance with NSF Standard 49, Biosafety Cabinetry: Design, Construction, Performance and Field Certification, Section N.5.5.3.2 Filter that cannot be scanned but it’s probably going to be impossible to scan the filters as outlined in Part C and D."

. Agree, this language will be removed.

18. "Sheet E-800 One Line Drawing shows most of the equipment to have (GFE) at the bottom indicating Government Furnished Equipment. Some have (CFE) indicating Contractor Furnished Equipment.

Can we confirm what equipment is being furnished by the Government and what is furnished by the contractor?"

. Please indicate what other confirmation is required. E-800, various other drawings/details, and specifications provide what is GFE vs CFE.

19. "We are needing some clarification on fixtures for the Lawton ATCT job. On pages E116 and E117, they show fixture type ‘XFG’ around the outside corners of the building. The fixture schedule has ‘XFG’ as a linear light, but the architectural drawing show these to be standard downlights."

. ‘XFG’ represents linear LED lights placed at exterior cab mullions and corners of cab roof parapet. These light fixtures are called out in the architectural drawings 1/A630, 3/A631, 1/A632 and highlighted yellow in the image below. They are not shown as downlights in architectural drawings.

Refer to drawing E550 for the front-of-house light fixture schedule.

RFI #6

1. Specification 230900 Paragraph 1.4. Technical Proposal, subparagraph A states: "Each of the vendors shall submit for consideration a system that is the best and most current system he has to offer. FAILURE TO COMPLY WITH THIS SECTION WILL RESULT IN A

REJECTION OF VENDOR’S BID AND SHALL AUTOMATICALLY ELIMINATE THE VENDOR

FROM ANY FURTHER CONSIDERATION." Please verify this section is NOT intended to be included in the contract as approval from the Engineer and Owner on a subcontractor technical proposal submitted post award contradicts the intent of adhering to the minimum requirements of a performance specification.

. Confirmed, FAA approval of a subcontractor proposal is not required post award.

2. Specification 230900 Paragraph 1.4. Technical Proposal, subparagraph A states: "Each of the vendors shall submit for consideration a system that is the best and most current system he has to offer. FAILURE TO COMPLY WITH THIS SECTION WILL RESULT IN A

REJECTION OF VENDOR’S BID AND SHALL AUTOMATICALLY ELIMINATE THE VENDOR

FROM ANY FURTHER CONSIDERATION." Please verify this Technical Proposal from the Controls System Contractor would be provided post award and that this does not have to be submitted with the Prime Contractors bid as there is not an administrative section to propose said Subcontractor Technical Proposal.

. Confirmed, subcontractor technical proposal’s not required to be submitted with Prime Contractors bid.

3. Specification 01 10 00 Summary of Work 1.16 subparagraph E - Building Permit Applications states "Contractor will not be required to obtain a Building Permit." Does this indicate that a Building Permit will not be required on the project or that the FAA will be responsible for procuring and paying for the Building Permit.

. A building permit is not required.

4. Reference: Spec 03 30 00, paragraph 2.2 ADMIXTURES, R. Porosity Inhibiting Admixture.

Which product produced by Barrier One (mfg.) is acceptable? Options are Porosity Inhibiting Admixture (PIA), Moisture Vapor Reduction Admixture (CPS), Infrastructure & Waterproofing Admix (CSX), Waterproofing Admixture (WPX). All are Barrier One products.

. Barrier ONE Porosity Inhibiting Admixture (PIA) is acceptable.

5. "Reference: Spec 03 30 00, paragraph 3.6 MASS CONCRETE, C. Required Submittals

a. Will the mat foundation be considered “Mass Concrete”? If so, will the SER accept 90 day compressive strengths?

. Mat foundation will be considered Mass Concrete. Provide 56 day compressive strength as indicated on the general notes.

6. Reference: Spec 03 30 00, paragraph 3.6 MASS CONCRETE. 2.We are requesting clarification regarding the requirement to follow the panel design as shown on the contract drawings. Specifically, Coreslab would like to propose a revision to the current design by incorporating a formed pocket in lieu of the embed plate detail EM-01 (Detail 1/522). We would also like to use strand in lieu of the pure rebar design shown. Please advise if this modification would be acceptable, or if strict adherence to the current design is required.

. Provide Embed plates per Detail 1/S522. Formed pocket will disrupt wall reinforcement. Stands will not be acceptable as slab reinforcement, pure rebar design is required per FAA

TDFS.

7. Reference Specification 01 43 39 - Mockups and Sample Installations - There are several subsequent specifications sections calling for either Mock-ups to be installed prior to ordering material or requiring off site mockups. In the interest of schedule and budget efficiency, please verify that the mock-ups can be revised and limited to "in-place" mock-ups and verification through the Quality Control process to validate quality and that the approved materials are being installed in accordance with the contract documents.

. Mockups are to be completed as specified.

8. Reference Specification 08 00 60 - Enclosure Performance - Paragraph 1.4 B States Delegated Design is required for the "Exterior Wall Enclosure Contractors" which includes multiple interdiciplinary trades. Many of the trades considered to be part of the "Exterior Wall Enclosure" do not have delegated design criteria in the trade specification. Please verify that the Delegated Design listed in this 08 00 60 - Enclosure Performance is only applicable to the specifications that list specific delegated design criteria requirements in said specification.

. Sections that call out delegated design are required to perform per delegated design.

9. Reference Specification 01 10 00 - Paragraph 1.16 - Permits and Fees. Subparagraph A lists a $250,000.00 allowance for the contractor to including in their bid to "pay for all the utility services charges to obtain requiring permits, including water appurtenances required by the Authority Having Jurisdiction." Please verify this allowance not only is intended for utility permits, but for other FAA permit costs that have not been quantified with a dollar amount in the contract documents. If that is not the case, please provide a cost or allowance for each other FAA permit that is not a utility permit covered under this $250,000.00 allowance.

. Specification has been updated.

10. Please advise if the timeline for RFI's can be extended to allow for contractor dialog to react and provide clarification to the FAA's RFI responses if necessary prior to the bid due date.

Unless the Solicitation closing date gets revised, and along with it additional time for further RFI’s all RFI’s will be due by end of day on 7/20/25, ten days prior to current closing date of 7/30/25.

11. Drawings CO61, CO62, CO63 and CO64 include notes regarding Airspace Protection. Note

2. states "CRANE OPERATIONS WILL BE LIMTIED TO PERIODS OF TIME HEIGHTS AND

OPERATIONAL LIMITS (HORIZONTAL AND VERTIAL) AND WORK HOURS APPROVED BY

FAA." Please provide the specific constraints to the 30' high crane working height as this will be a critical activity necessary for building a structure of this height. This would include core operation working hour limitations or other means to determine effective crane operation.

. The contractor is responsible for submitting an airspace study (7460-1) for the crane and/or any other construction equipment that is above 30’ AGL. That airspace study will outline any restrictions. An airspace study for the new ATCT has been submitted and approved by the FAA. The final determination will be uploaded to the KSN site.

As stated in the final determination, “A separate notice to the FAA is required for any construction equipment, such as temporary cranes, whose working limits would exceed the height and lateral dimensions of your proposal.” Please refer to the final determination for the exact coordinates used in the airspace study.

An airspace study that covers heights less than 30’ has been submitted and approved by the FAA. The final determination letter is located on the KSN site.

The Contractor is also responsible for filing supplemental notices (7460-2) as required by law or FAA.

12. Drawings CO61, CO62, CO63 and CO64 include notes regarding Airspace Protection. Note 5 states: "EXCEPT FOR FAA AIRSPACE APPROVED CRANE HEIGHT ALL OTHER

CONSTRUCTION EQUIPMENT, STOCKPILES AND TEMPORARY BUILDINGS SHALL NOT

EXCEED 30 FEET IN HEIGHT ABOVE EXITING GROUND" Please verify this does not apply to the new ATCT itself or any material, equipment, scaffolding, work being performed on the tower itself proper since the new structure will obviously be greater than 30'.

. The contractor is responsible for submitting an airspace study (7460) for the crane and/or any other construction equipment that is above 30’ AGL. That airspace study will outline any restrictions. An airspace study for the new ATCT has been submitted and approved by the FAA. The final determination will be uploaded to the KSN site.

As stated in the final determination, “A separate notice to the FAA is required for any construction equipment, such as temporary cranes, whose working limits would exceed the height and lateral dimensions of your proposal.” Please refer to the final determination for the exact coordinates used in the airspace study.

An airspace study that covers heights less than 30’ has been submitted and approved by the FAA. The final determination letter is located on the KSN site.

The Contractor is also responsible for filing supplemental notices (7460-2) as required by law or FAA.

RFI #11

7/22/25

1. Specs Section 099646: Is a 1 or 2-hour rating required for the intumescent fireproofing at the tube steel members supporting the cab roof? Per specifications the intumescent fireproofing is to be shop applied. Please confirm the intumescent fireproofing is to be shop applied and not field applied..

. 1- One hour fire resistance rating is sufficient for members supporting the roof per Type 1B construction, therefore the intumescent fireproofing that supports the cab roof can be 1-hr rated as suggested. Architectural details have been updated to reflect this. Confirmed that intumescent fireproofing shall be shop applied.

2. 078100: Per the code plan sheets the project is to be figured as Type IB construction per the FAA’s request. IB construction requires a 2-Hour rating for members supporting the floors and 1-hour for members supporting only the roof. Several details indicate the steel members, reference 1 / A640, at the cab roof to carry a 2-hour rating not taking advantage of the 1-hour reduction allowed by code. The structural plans for the cab roof level indicate the concrete thickness is reduced to 3-1/2” NW concrete on 1-1/2” metal decking while the levels below are 4-1/2” NW concrete. 3-1/2” of NW concrete is not enough to provide the indicated 2-hour rating and would require the decking at the cab roof to fireproof. If the intent is to only require a 1-hour rating then the 3-1/2” would be enough and would eliminate the need to spray the decking. Please clarify if a 1 or 2-Hour rating is required at the cab roof level.

Accept 1-hour reduction allowable by code. If utilized it will result in the elimination of fireproofing required at the underside of the cab roof deck.

. Confirming that 1-hour fire resistance rating at cab roof is sufficient per code for Type 1B construction. Relevant drawing callouts have been updated as part of this addendum.