BRKR162322-162323 RFI Responses No. 2.pdf

Date: 1 July 2020

To: SMSgt. William Hall

Subject: ANSWERS TO RFI #002

Project: REPAIR FIRE SUPPRESSION, FUEL CELL BUILDING 135

REPAIR FIRE SUPPRESSION, HANGAR BUILDING 138

Job #: ANG# BRKR162322 / SSL# 17069

ANG# BRKR162323 & SSL# 17070

From: David Donovan

The following items pertain to both Project BRKR162322 and Project

BRKR162323:

1. Drawing S0.1 – Section A-A is cut through the Typical Foam Generator Anchorage

Framing Plan and it includes a note indicating the bottom elevation of the new foam generators shall be coordinated with the architectural drawings; however, the architectural drawings do not indicate the mounting height of the new foam generators. Please provide the mounting height for the new foam generators.

a. Answer: See revised drawing sheet FP110 for both BRKR162322 and BRKR162323 issued as part of Addendum No. 2 for generator mounting height.

2. Draft Curtain Detail – Section 2/A2.3 on Building 135 and Section 2/A2.5 on

Building 138 indicate the new metal wall panels that create the draft curtain are attached to new metal stud framing that is attached to the existing steel trusses. These existing steel trusses are connected to the existing cantilevered steel trusses above the hangar doors. The draft curtain detail does not allow for any movement in the existing steel trusses, but it would seem the existing steel trusses would deflect when the hangar door is opened and closed. Please consider changing the draft curtail detail to accommodate deflection of the existing roof structure.

a. Answer: It is expected that the cantilevered trusses FT-3 will deflect as a unit and there will be no differential deflection between the top and bottom chords. Thus, draftstopping panels can be attached to truss units without consideration of movement within each truss segment. However, framing and draftstopping panels will require a break at existing column line FX to account for deflection of trusses FT-3 that truss FT-4 will not

REPAIR FIRE SUPPRESSION, FUEL CELL BUILDING 135 BRKR162322

REPAIR FIRE SUPPRESSION, HANGAR BUILDING 138 BRKR162323

RFI RESPONSES NO. 002 Page 2 of 10 Seay Seay & Litchfield, P.C. 1 July 2020 experience. See revised drawing sheet A2.5 (BRKR162323) included in Addendum No. 2. Also see new drawings sheet A2.5 (BRKR162322) added by Addendum No. 2 for additional draftstopping details to address the concern regarding deflection of truss members FT-3.

3. Drawing FA-003 – The NEC Hazardous Classification areas are indicated in relationship to the aircraft; however, the dimensions of the aircraft are not provided and the details showing the NEC Hazardous Classification areas are not drawn to scale. Please provide the boundaries of the NEC Hazardous Classification areas on the electrical and fire alarm floor plans.

a. Answer: Refer to revised sheets E-101 and FA-003 for BRKR162323 issued as part of Addendum No. 2. Refer also to revised sheets E-100 and FA-003 for BRKR162322 also issues as part of Addendum No. 2.

4. There is no reference to Corrosion Protection of the new Ductile Iron Pipe to be installed underground. Shall a Cathodic Protection System be required to protect the buried pipe?

a. Answer: Refer to specification section 33 1117, part 2.07(B). All buried ductile iron piping shall be encased in polyethylene tube or sheet to prevent ductile iron piping from being in contact with soil.

5. For both buildings there is requirement for an Emergency Generator Receptacle.

Please provide a basis of design (Manufacturer, Style, Amp Rating, Etc.) for the required receptacle for generator connection.

a. Answer: Delete the generator connection receptacle that is shown wired to the Manual Transfer Switch (MTS). The MTS shall be provided with lugs that are rated for a generator to be directly wired to the switch. See also Addendum No. 2, BRKR162322 – Item No.4, BRKR16232 – Item No.

3.

6. Division 1 Specifications – Several Division 1 specification sections refer to the

General Conditions; however, the Project Manual does not include General Conditions. Please clarify this matter.

a. Answer: Replace “General Conditions” with “applicable portions of the Solicitation Requirements and applicable sections of the Federal Acquisition Regulations.”

7. Specification Section 01 4000 – Quality Requirements – Item 1.06D states, “The

Contractor shall employ and pay a separate, designated, experienced quality control person, to perform full time on site quality control services”; however, Item 1.03E in Specification Section 01 3000 – Administrative Requirements indicates the Contractor shall provide a Quality Assurance Manager who will be responsible for quality control management. Please clarify this discrepancy.

RFI RESPONSES NO. 002 Page 3 of 10

a. Answer: The Contract requires two levels of quality control. As established in section 01 4000, a dedicated full-time, on-site, quality control manager is required. Additionally, the General Contractor shall provide second quality assurance manager as outlined in section 01 3000.

The quality assurance manager required by section 01 3000 may, at the discretion of the Contractor, also serve as the project manager. The Quality Assurance manager shall visit the site weekly and submit quality assurance reports to the Government following each visit as outlined in section 01 3000.

8. Specification Section 01 5000 – Temporary Facilities and Controls – Article 1.03 requires one land line telephone and one internet connection for the field office. We trust the Owner handles all telecommunication services inside Sumpter Smith Air National Guard Base. Will the Owner provide the telephone land line and internet connection at no cost to the Contractor? If not, what will the cost be to provide the telephone land line and internet connection for the field office?

a. Answer: See revised specification section 01 5000 included as part of Addendum No. 2.

9. Specification Section 01 5000 – Temporary Facilities and Controls – Article 1.06 requires a 6’ high fence around the construction site. Is this requirement applicable to this project?

a. Answer: See revised specification section 01 5000 included as part of

10. Specification Section 01 5100 – Temporary Utilities – Article 1.03 indicates that

Owner’s existing power service may be utilized for the Contractor’s use; however, Item 1.03F states, “Permanent convenience receptacles may not be utilized during construction.” Is the requirement of Item 1.03F correct?

Answer: Yes, item 1.03F is correct. The Government owns and maintains the primary power distribution system and one meter is present for the entire base where the Government owned systems connect to the public utility. As such, the Contractor will be allowed to connect to the Government owned primary power distribution system and the Owner will bear the cost for the electricity. However, use of the existing Building 135/137/138 facility infrastructure is not allowed. The Contractor shall establish temporary service and distribution as necessary to complete the work. The Contractor will connect to an existing pad-mount transformer. The cost to install temporary service and distribution, as well as the cost to remove the temporary services/distribution system at the end of construction, will be the responsibility of the Contractor; however, no usage fees will be assessed.

Temporary service shall be installed in accordance with applicable sections

RFI RESPONSES NO. 002 Page 4 of 10 of the NEC and other governing codes & criteria. Contractor shall employ methods to reasonably conserve energy.

11. Specification Section 01 5719 – Temporary Environmental Controls – Item 3.01 states, “Use of HVAC equipment and ductwork for ventilation during construction is not permitted”; however, Article 1.07 in Specification Section 01 5100 – Temporary Utilities indicates that use of the existing ventilation equipment is permissible. Please clarify this discrepancy.

a. Answer: Refer to revised specification section 01 5100 included in

12. Specification Section 01 6116 – Volatile Organic Compound (VOC) Content

Restrictions – Article 1.06 pertains to independent firm specializing in performing testing and inspections of the type specified in this section; however, no testing or inspections are specified in this section. Please clarify this discrepancy.

a. Answer: Refer to revised specification section 01 6116 included in

13. Specification Section 01 7000 – Execution and Closeout Requirements – Item 3.04O requires a certified survey of construction and site work. Is this requirement applicable to this project?

a. Answer: This requirement is applicable to BRKR162323. It is not applicable to BRKR162322. Refer to revised specification section 01 7000 included in Addendum No. 2 for BRKR162322. The intent of this requirement for BRKR162323 is to provide accurate, survey grade, documentation of the new footprint of Building 137 as well as location of new and re-routed above grade and sub-surface structures and utilities.

14. Specification Section 01 7000 – Execution and Closeout Requirements – Item 3.15 indicates the Contractor will be responsible for the cost of maintenance for a period of no less than one year after the Date of Substantial Completion. Is this requirement applicable to this project?

a. Answer: Refer to revised specification section 01 7000 included in

15. Specification Section 02 4100 – Selective Demolition – Item 3.5A requires that debris, junk and trash shall be removed from the site on a daily basis; however, Article 3.05 of Specification Section 01 7419 – Construction Waste Management and Disposal allows for storage of materials for recycling and trash disposal. Please clarify this discrepancy.

a. Answer: Debris, junk, and trash shall be removed from inside of buildings 135, 137, & 138 daily. Debris, junk, and trash shall also be removed from exterior areas within the project limits daily.

Accumulation of debris into closed lid containers located on site (in

RFI RESPONSES NO. 002 Page 5 of 10 location(s) approved by the Contracting Officer) will be allowed. Debris, junk, and trash located outside of closed lid containers both interior to buildings 135, 137, and 138, as well as exterior site areas must be cleaned and removed daily.

16. Specification Section 04 2000 – Unit Masonry – Item 2.01A.5 indicates bullnosed

CMU shall be provided at exposed outside vertical corners. Is this requirement applicable to this project?

a. Answer: Yes. All exposed outside corners of new CMU interior and exterior wall partitions shall be provided with bullnosed (or radiused) edge CMU block. Requirement is also applicable to door jamb conditions

– refer to door details. Base course of all CMU walls shall be square edge to allow installation of specified wall base materials. All blocks above the base course shall be radiused/bullnosed.

17. Drawing S0.1 for Building 138 includes a Detail labeled “Typical Condition Where

New CMU Abuts Existing Wall”; however, Drawing S0.1 for Building 135 does not include this detail. Does this detail apply to applicable conditions in Building 135?

a. Answer: The detail in question is not applicable to Building 135 or Building 138. This condition is only required at load bearing/wind resisting exterior wall conditions at Building 137.

18. Drawing LS-1 – Life Safety Plan (Both Buildings) – The Symbols Legend includes a dashed line and notes which states, “Existing walls required to be one hour rated.

Contractor to patch, seal and firestop all existing and new penetrations in the existing wall assembly.” The Life Safety Plan indicates these dashed lines at all existing walls that separate the hangar bay from the adjacent office, shop and ancillary spaces.

There are conditions in both buildings where these existing partitions extend up above the finish floor and transition to a sloped surface that is covered with metal panels.

Does the scope of work include firestopping existing and new penetrations through the sloped surface covered with metal panels? If so, please provide the existing construction detail so that we can determine the firestopping required to maintain the one-hour separation.

a. Answer: Yes. The requirement to firestop new and existing penetrations in the sloped “ceiling” surface where similar conditions exist within both Building 135 and 138. Requested existing construction detail is included as an attachment to these RFI responses.

19. Draft Curtain Detail – Section 2/A2.3 on Building 135 and Section 2/A2.5 on

Building 138 indicate the new metal wall panels that create the new draft curtain.

The framing for the new draft curtain is constructed with metal stud framing at 24” on center; however, there isn’t a specification section for cold-formed metal framing in either Project Manual. Please provide a specification section for the cold-formed metal framing associated with the new draft curtain.

RFI RESPONSES NO. 002 Page 6 of 10

a. Answer: Refer to specification section 09 2116 for metal stud framing specifications.

20. Draft Curtain Detail – Section 2/A2.3 on Building 135 and Section 2/A2.5 on

Building 138 indicate the new metal wall panels that create the new draft curtain.

These details include a note which states, “Cut panels to fit tight against all existing building systems that will penetration new panel”. The metal panels specified in Section 07 4100 – Metal Wall Panels are 36” wide and the existing penetrations that will penetrate the new metal wall panels include active utilities in piping and conduits. Will it be acceptable to cut slots in the metal wall panels to allow the existing active piping and conduit to remain in place during installation of the metal wall panels. The slots would be patched with sheet metal matching the metal wall panels. If this is not acceptable, then is the expectation for the active existing piping and conduits to be temporarily taken out of service, disconnected and reconnected so that a neat hole can be cut in the panel? Please provide additional instructions if neither of these methods are acceptable.

a. Answer: Existing piping, conduit, etc… scheduled to remain shall remain in service and shall not be taken out of service to facilitate installation of new draftstopping. See revised drawing sheet A2.5 (BRKR162323) included in Addendum No. 2. Also see new drawings sheet A2.5 (BRKR162322) added by Addendum No. 2 for additional draftstopping details to address treatment of existing piping, conduit, etc… intended to remain that will penetrate the new draftstopping panels.

21. Specification Section 07 4100 – Metal Wall Panels – Items 2.02D pertains to structural performance of the metal wall panels. This item includes wind loads, but the metal wall panels are on the interior of the building. This item also includes seismic loads, but the metal wall panels are attached to the existing roof structure.

Are these requirements applicable to this project?

a. Answer: Refer to revised specification section 07 4100 included in

22. Specification Section 28 3176 – Interior Fire Alarm and Mass Notification System –

Article 3.6 indicates all conduit boxes, etc. to be painted to match the room finish;

however, Note 25 on Drawing FA-001 indicates all conduit is to be provided with a factory applied red finish. Please clarify this discrepancy.

a. Answer: All conduit shall be factory applied red finish and junction box covers shall be a matching red color.

23. Specification Section 31 2210 – Earthwork – Item 1.05A indicates soil testing and inspections shall be provided by a Geotechnical Testing Agency paid by the Contractor; however, Item 3.20A indicates the Owner will engage a Testing Agency to perform field quality control testing. Please clarify this discrepancy.

RFI RESPONSES NO. 002 Page 7 of 10

a. Answer: Testing to be provided by the Contractor. See revised specification section 31 2210 included in Addendum No. 2.

24. Specification Section 32 1217 – Asphalt Concrete Paving – Item 1.02A indicates the scope of work includes milling of the existing asphalt at locations shown on the plans;

however, the plans do not indicate areas where the existing asphalt paving is to be milled. Please clarify this discrepancy.

a. Answer: Asphalt milling is not included in the project scope. See revised specification section 32 1217 included in Addendum No. 2.

25. Specification Section 33 1117 – Outside Water System – Item 3.08I indicates the water piping shall be chlorinated in accordance with AWWA C651; however, all of the piping being installed is for fire protection systems. Is this requirement applicable to this project?

a. Answer: Yes, requirement is applicable.

The following items only pertain to Project BRKR162322:

26. Drawing FP110 – The Fire Protection Floor Plan – Overall New Work indicates Building Sections labeled 1/FP300 and 2/FP300; however, the Bid Documents do not include Drawing FP300. Please provide Drawing FP300.

a. Answer: Sections labeled 1/FP300 and 2/FP300 were extraneous sections markers which have been removed. See revised drawing sheet FP110 issued as part of Addendum No. 2.

27. Drawing A2.2 – Existing Door Schedule Door Opening F117 states, “Remove existing door/frame and install new opening – See Door Schedule”; however, the Door, Opening & Frame Schedule – New Doors does not include Door Opening F117. Additionally, the Ground Floor Plan on Drawing A2.1 does not indicate a Door Opening F117. Please clarify this discrepancy.

a. Answer: Door F117 is the existing opening to room F109 where specific note 3 requires removal of door and frame and installation of new opening F142.

28. Drawing A2.2 – Existing Door Schedule Door Opening F132 states, “Remove existing door/frame and install new opening – See Door Schedule”; however, the Door, Opening & Frame Schedule – New Doors does not include Door Opening F132. Additionally, the Ground Floor Plan on Drawing A2.1 does not indicate a Door Opening F132. Please clarify this discrepancy.

a. Answer: Door F132 is the existing opening to room F102A where specific note 3 requires removal of door and frame and installation of new opening F143.

RFI RESPONSES NO. 002 Page 8 of 10

b. Similarly, Door F107 is the existing opening to room F104 where specific note 2 requires removal of door and frame and installation of new opening F141.

29. Specification Section 05 5213 – Pipe and Tube Railing – Item 1.04C indicates two (2) samples of the handrail shall be provided, but the scope of work only includes one simple handrail. Is this requirement applicable to this project?

a. Answer: No, this requirement is not applicable to this project. See revised specification section 05 5213 included in Addendum No. 2.

30. Specification Section 05 5213 – Pipe and Tube Railing – Item 1.04D indicates that a

Fabricator’s Qualification Statement be submitted for approval, but the scope of work only includes one simple handrail. Is this requirement applicable to this project?

a. Answer: No, this requirement is not applicable to this project. See revised specification section 05 5213 included in Addendum No. 2.

The following items only pertain to Project BRKR162323:

31. Drawing C1.0 – There is an existing light pole located to the northeast of existing

Building 137. The existing light pole appears to encroaches into the footprint of the enlarged Building 137; however, the drawing does not indicate the existing light pole should be removed. Does the scope of work include removing the existing light pole?

a. Answer: Yes. Relocation of the light pole is required. Refer to revised drawing sheet E-100 issued as part of Addendum No. 2.

32. Page A2.6 of the B138 Drawings, Specific Note 1 states to refer to Electrical for

Lighting requirements in this space. However, no lighting (other than an exit sign) is shown for this space in the Electrical Drawings. Shall new lighting be installed in this area?

a. Answer: Yes. Lighting is required. See revised drawings sheets E-001, E- 002, E-004, and E-101 issued as part of Addendum No. 2

33. There are no requirements listed for Temporary Power and Lighting to the Pump house Building 137 while it is being constructed. Will Temporary Power and Lighting be required?

a. Answer: Contractor shall provide and temporary power to B137 from the temporary construction service/distribution systems (see response to item 10 above). Temporary power to building 137 shall support the following:

i. Contractor shall install a heated and insulated backflow preventer enclosure equal to “Hot Box” or “Safe-T-Cover” that contains an electric heater capable of maintaining a minimum ambient air temperature of 40 degrees Fahrenheit at all times. The enclosure must enclose all exposed, above grade, water piping to prevent pipes from freezing. Enclosure must remain in place until

RFI RESPONSES NO. 002 Page 9 of 10 construction of Building 137 is complete and new HVAC systems are operational and capable of maintaining ambient air temperatures above 40 degrees Fahrenheit. Enclosure shall have a hasp for installation of a pad lock. Pad lock to be furnished and installed by the Government.

ii. Contractor shall install temporary construction lighting within Building 137 as required to facilitate construction operations, to facilitate routine inspection of the work by the Government, to facilitate periodic operation/maintenance of the backflow preventer while construction is ongoing, and as required to maintain safety and security of the facility.

iii. Contractor shall bear all costs to install and remove temporary power, lighting, and backflow preventer enclosure. Usage costs for electricity service will be the responsibility of the Government.

Contractor shall employ measures to reasonably conserve energy.

34. Will the existing light pole near Building 137 need to be removed and relocated to accommodate the expansion of Building 137? If relocated, where shall it be placed?

a. Answer: Yes. Relocation of the light pole is required. Refer to revised drawing sheet E-100 issued as part of Addendum No. 2.

35. Page ES-3 of the Building 138 drawings shows that the existing 500KVA Transformer is a Loop Feed with in and out Primary Bushing Wells. However, there seems to be a Primary Tap Cap on the Pad, next to the Transformer. Please confirm that the existing Transformer has the required connections to serve the new underground 15KV Cables for the New Transformer.

a. Answer: Provide a 15 kV load break feed thru insert. Refer to revised drawing sheet ES-3 issues as part of Addendum No. 2.

36. Drawing A2.3 – A new door and door frame are to be provided at Door Opening

M142 according to the Door, Opening & Frame Schedule – New Doors on Drawing A2.4 and the Head Detail is identified as 1/A2.4 and the Jamb Detail is identified as 2/A2.4. These details indicate installation of a new lintel and reinforced CMU at the door jambs. Door Opening M142 is located in an existing exterior wall; however, the Ground Floor Plan does label this door opening with Specific Note 2 which requires shoring the existing wall. We trust this was an inadvertent oversight and that shoring of the existing wall will be required to install the new door frame at Door Opening M142. Please clarify this matter.

a. Answer: Refer to revised drawing sheet A2.3 included in Addendum No.

2.

37. Same question as above, but for Door Openings M143 and M144.

a. Answer: Refer to revised drawing sheet A2.3 included in Addendum No.

2.

RFI RESPONSES NO. 002 Page 10 of Seay Seay & Litchfield, P.C. 1 July 2020

38. Specification Section 07 2100 – Thermal Insulation – Item A.4 under Article 2.02 indicates the foam board thickness shall be 2½” and “as thicknesses as required to maintain 1” minimum air space”. Section 2/A2.2 states 2” thick rigid insulation shall be provided; however, the rigid insulation shown in Section 2/A2.2 seems to be thicker than 2”. What is the thickness of the rigid insulation in the masonry cavity wall?

a. Answer: Rigid board thickness for Building 137 exterior wall cavity is 2- 1/2”. Where new rigid board is required to be installed in/around new openings within existing exterior wall assemblies of Building 138, rigid board thickness shall be as required to match existing insulation board thicknesses and as required to maintain a minimum 1” air space between the back of the brick veneer masonry and the face of the new rigid insulation board.

39. Drawing FAS-1 – There is a detail entitled Fiber Optic Conduit Separation Detail which indicates the new 4” conduit with the fiber optic cable shall be separated from other existing underground utilities by a minimum of 24” where possible. This drawing also includes Keynote 2 which indicates the new 4” conduit for the fiber optic cable shall be directional bored where possible. There are new underground utilities that will be located in the same proximity of the conduit with fiber optic cable; therefore, we suggest installing trenches for all new underground utilities to insure accurate separation of the new underground utilities. Will this be acceptable?

a. Answer: Yes. This approach will be acceptable.