Additional_Responses_to_Industry's_RFIs_2-23-17.pdf

Facility-wide Modernization and Expansion of the Land Port of Entry at Alexandria Bay

GS-02-P-17-DT-C-7002

Additional RFI Responses as of 2/23/17

Please see the original RFI Response Sheet for RFI 1-17 and their respective responses.

Please see RFI Response Sheet dated 1/6/17 for RFI 18-78 and their respective responses.

Please see RFI Response Sheet dated 1/20/17 for RFI 79-111 and their respective responses.

Please see RFI Response Sheet dated 2/3/17 for RFI 112-126 and their respective responses.

Please see RFI Response Sheet dated 2/14/17 for RFI 126-178 and their respective responses.

Please see RFI Response Sheet dated 2/16/17 for RFI 178-195 and their respective responses.

RFI196: Reference drawing C MP 4 02 (Volume 01) which shows capped HHWS&R to/from temporary back-up boiler skid. We do not see any specifications or drawings showing this temporary boiler skid.

Please confirm that the temporary boiler skid is not part of this project. This would also apply to Volume 05 drawings.

Response196: Confirmed, the boiler connections are for a future boiler.

RFI197: Reference drawing N MP 1 00 (Volume 06) as it pertain to the snow melt system. The drawings shows HHWS&R piping with a note that says “to manifold”. Please provide more information / detail on the manifold as well as the size of the snow melt system. Can we assume that the hashed area represents the snow melt system?

Response197: The dashed area does represent the extent of the snow melt system. The drawings are missing a note as follows: "SNOW MELT AREA MANIFOLDS TO BE COORDINATED WITH TRENCH DRAIN.

DETAILED LAYOUT TO BE PROVIDED BY SUPPLIER. MAX CIRCUIT LENGTH = 76M. 15MM PEX TUBING

PIPEWORK AT 150MM SPACING EMBEDDED IN 75MM COVER SLAB"

RFI198: I am looking for the “Insurance Requirements” for this project and have not found the specific requirements in the contract documents. There is reference to Clause Incorporated by Reference but I have not been able to access the insurance information. Can you provide the insurance requirements for contractors with limits on this project?

Response198: See Section III.L. of the Draft Agreement for Insurance Requirements.

RFI199: 1. Reference drawings M AE 403, M AE 603 and M AE 604 (Similar drawings C AE 603, V AE 601 and X AE 601): Please provide:

a. Specifications for the UL 752 Level 3 BR glazing assembly including buttresses. There is a specification for other security glass types and for Level 8 glazing, but none for the Level 3 glazing.

b. Head details for the glazing including identifying metal receiving channels. The one reference to C2/D AE 6 12 does not show the glazing. Is detail A4/D AE 621 applicable?

c. Request a specification on the receiving channels for jambs shown on A2 & C2/D AE 623.

d. Request a specifications on the transaction trays and microphones.

Response199: 1a. Basis of Design: Horizontal Baffle Counterline by Insulgard Secuirty Products with UL752 Level 3 rated construction with 1.25" SP1250 Lexgard

1b. Yes.

1c. Support brackets belong to transaction window product.

1d. Transaction tray belongs to transaction window product. Refer to spec section 282300 Video Surveillance and Audio Recording for Microphone specifications.

RFI200: Drawing V EP 1 00 shows panel AP-APH which is not shown on the one – line or panel schedule on M EJ 6 01. Is this panel by the EC and if so provide panel details and feeder information.

Response200: Panel AP-APH is furnished an installed by the electrical contractor. Panel AP-APH to be fed from a 3 pole, 30 amp circuit breaker in panel RP-APH with (4) #10 + (1) #10g. Panel AP-APH shall be 100 amp, main lug only with 42 poles with (42) 20 amp, 1 pole branch circuit breakers. 22,000 rms sym amps.

RFI201: Please provide edge of slab details for sections 1,3,5,13/DSJ522. Please advise if metal deck or a continuous plate is required to carry the concrete slab over steel beams.

Response201: Slab is intended to be Cast in Place Concrete. At this time no pour stop is required. Please carry a contingency of a 3/8" thick galvanized bent plate for the edge of slab.

RFI202: In reference to drawings PSJ202 & 203, the cladding support frames. There are some bays that appear to show diagonal bracing in the framing, but are not sized or shown in any of the blow up views.

Please provide details.

Response202: The size of all braces in the screen wall shall be HSS203.2X101.6X9.5 (LLH).

RFI203: To simplify what our scope is can you clarify for the following. Who is responsible to furnish and/or install the Security System Equipment for each of the following specification Sections? Who is responsible to furnish and/or install the Cabling for each of the following specification Sections? Who is responsible to furnish and/or install the Conduit for each of the following specification Sections? 275123 Security Intercommunications Systems, 280500 Electronic Safety and Security, 281300 Access Control, 282300 Video Surveillance, 285000 Security Communication Equipment, 286000 Security Equipment Cabinets and Enclosures

Response203: Security Contractor shall furnish and install all devices, cabling, and equipment for the security system, per specifications 275123, 280500, 281300, 282300, 285000, and 286000.

RFI204: PCWP-C1,2,3 are scheduled as model “e80-SC” pumps (split-coupled vertical inline). Drawing (C MH 3 03) would appear to show these pumps installed in a horizontal configuration with the motor shaft parallel to the floor. The e80-SC pumps are recommended for vertical mounting only, with the motor shaft pointing to the floor. The standard “e80”, which is the close-coupled hydraulic equivalent can be installed vertically or horizontally. Please confirm desired configuration and model number.

Response204: The desired configuration is horizontal and as schedule with an e80-SC.

RFI205: PCWP-C1,2,3: The duty point shown results in an 1150 RPM selection versus the 1750 RPM that is scheduled.

Response205: 1150 RPM is OK

RFI206: The pump line sizes shown on schematic drawing C MJ 6 02 do not match the line sizes shown on drawing C MH 3 03 for the pump serving HRC -C1, C2. Which is correct?

Response206: 65mm as per CMJ602

RFI207: All end-suction pump scheduled are model “e1510” which are split-coupled end-suction pumps.

The hydronic pump specification only discusses “close-coupled, end-suction” pumps, which would be a model e1532. Which type of end-suction pump is preferred?

Response207: The desired model is e1510 as scheduled.

RFI208: PCHWP-C4,5 are scheduled as “Series 60” pumps which are split-coupled horizontal inline pumps.

There is no specification for “split-coupled inline” pumps. Is the Series 60 the desired pump and will a specification section be created for its inclusion?

Response208: The desired model is the model 60 as scheduled. A supplementary specification will be issued.

RFI209: Air Separators: The schedule shows R-4F for all 3 air separators. The schedule lists a size of 150 mm (6”), which would indicate model R-6F. Based upon the flow rates listed (18 LPS, 11 LPS, and 26 LPS), we would expect to use R-4F, R-5F, and R-5F respectively. Please confirm the size Rolairtrol desired.

Response209: R-4F, R-5F, and R-5F respectively is acceptable.

RFI210: Expansion tanks: The expansion tanks scheduled are compression tanks that are used with “the air control” strategy of air management, where the air separator sends air to the compression tank. The details are showing that the “Air Elimination” strategy is to be employed, where the air separators eliminate the air from system by an air vent. The “Air Elimination” strategy should result in a bladder or diaphragm tank selection. Please confirm.

Response210: Use Diagrpam Wessels Model # NTA 20. Diaphragm type expansion tank is listed in specifications. 232113-2.7-C

RFI211: Reference Drawing C MJ 6 06 – Detail 1 as it pertains to Fuel Oil Piping at underground fuel oil tanks. Detail indicates fuel oil tank vent to route back to the Commercial Building, which is approximately 66 meters away from the tanks. Please verify that fuel oil tank vents are to be routed back to the commercial building.

Response211: Fuel oil vents are indicated on the plans eminating from the center of the fule oil tank, routing northeast and rising up perpendicular to the column lines between CL NB & NC. The diagram on CMJ606 is indicative only.

RFI212: I see a detail for rock anchors at the Main Building. Please provide a specification for this work.

Response212: The Contractor shall have the Pile Sub Contractor provide signed and sealed calculations and details of rock anchor and potential connections to the foundation for the rock anchor design.

Which shall be submitted to the Structural Engineer of Record for review.

RFI213: There are Steel H piles required for the overhead parking structure, Main Building and Retaining Wall. Is there a design depth stated that we should use as a basis for our Bid? I don’t find it anywhere.

Response213: Refer to Geotechnical Report Revision 1 - Section 6.15 for Driven Pile Foundation Recommendations.

RFI214: Can you provide further clarification to Specification 011000, Section 1.3.C.1 regarding what the Government will contract separately and how the General Contractor and Electrical Subcontractors are to integrate, coordinate and define the scope we are to cover?

Response214: The design documents show the extent of all work to be performed by the General Contractor and subcontractors.

When other contracts are awarded by the Government for the systems identified in specification section 011000 Section 1.3.C.1, representatives from those contracted entities will participate in regular project meetings and will be required to coordinate with the GC and all subcontractors.

RFI215: Phase 1A is stating to relocate existing overhead utility power lines. This is bringing up several questions. Please read below. 1. Are these Overhead Power Lines Owned by National Grid? 2. If so who is responsible for contracting with the Utility? The General Contractor or GSA? 3. If GSA is responsible for contracting Electrical Utility, has coordination with the work associated with relocating the overhead power lines been finalized? This question is for scheduling reasons. 4. Have some or all of the these overhead power lines in Phase 1A been relocated already? 5. Who is responsible for contracting the Electrical Utility work for the remaining phases of construction (ie. primary cabling, medium voltage pad mount transformers, etc)?

Response215: 1. Yes, overhead power lines are owned by National Grid.

2. Contractor is responsible for contacting coordinating with the utility. See drawing G-CU-403 for contact information.

3. Coordination of final relocation of overhead lines to be by the Contractor and National Grid. Refer to drawing G-CU-403 for proposed relocations.

4. Refer to drawing G-CU-403 for overhead lines that require relocation. Some of the overhead lines have been relocated.

5. Contractor is responsible for contacting coordinating with the utility for the remaining phases of construction.

RFI216: Drawing P AE 1 10 calls for 76 mm seismic joints, Ref. to Section C2 / AE 5 05. Expansion joint detailed has no Specific material reference or manufacturer in specification Section 07 54 00, 07 71 00, nor 07 95 00 within Division 07. Can you provide product manufacture or equal for the detailed roof expansion joint.

Response216: For Typical Seismic Joint Details at PARKING DECK - refer to Details 8 and 7 on DSJ 521 (currently noted as 9 between 8 and 6, which will be changed) . For seismic joints at PARKING CANOPY -material and manufacturers listed under specification section 079500 Part 2.

RFI217: Reference Drawing DSJ-521, Detail 12. Please provide the required spacing of the weld tabs.

Response217: Spacing shall be 610mm on center

RFI218: Specification Section 034500, 2.4-A.3 makes reference to “Pigment as per architect selection.”

Drawing DAE-501, Finish Schedule for Cladding System EWS-3 denotes color to be 50% white, 50% grey cement. Is there further intent to require pigment color other than that specified on the Finish Schedule?

Response218: Final color to be approved by Architect.

RFI219: Specification 034500, 1.6 B-2.c regarding architectural panel performance to “Withstand…degrading effects of…. vandalism… Does this imply that the panels require anti-graffiti coating?

Response219: Yes - refer to 034500 Part 2.7.2.a for sealer products.

RFI220: 1. Drawing P AE 3 03 Reference edge sections A1 - P AE 3 50 and C1 – P AE 3 50, which then reference us to Detail section B1 – AE 5 44, showing bolted galvanized/painted angle and closure plates along the edge of the parking structure slab. Detail Section 11 – D SJ 5 22 indicates angle and grating to the slab edge at a similar condition, but there is no cross reference as to where this detail occurs.

Drawing P AE 485 shows temporary stairs with grating platform matching into the slab edge, but indicates no section reference at the juncture. Is Detail Section 11 – D SJ 5 22 intended to apply to the temporary stair grating juncture indicated on P AE 485 and/or is there any other location 11 – D SJ 5 22 applies?

Response220: The detail on 11/DSJ522 is to match detail B1/DAE544. Replace the grating in 11/DSJ522 with a flat galvanized perf plate per the architect on B1/DAE544. The condition is different at the temporary stair juncture. The grating shall not be tied to the edge of slab.

RFI221: Section 221437 - This spec section calls out Tanks, Pumps, controls, etc. for the rainwater harvesting system. This system is not shown on any plumbing drawing. The only mention I can find is on Volume Civil Drawing G CU 2 02 which shows a 300 mm storm sewer emptying into a Rainwater cistern.

Please comment.

Response221: For more information on the Rainwater Harvesting System, refer to the following drawings within Volume 3: G-CU-102, G-CU-121, G-CU-202, G-CU-321, G-CU-502

RFI222: Section 071328 Bentonite Waterproofing, please identify clearly the areas / buildings that are to receive under slab waterproofing. Para. 1.3.A.1 identifies one location. However para. 1.3.A.3simply states “beneath slabs on grade which can mean that this is to be done at every single building……some details however clearly indicate a vapor barrier to be installed on the under slabs only.

Response222: Install vapor barrier underneath slabs and at foundation walls (typical) except at conditions with hydrostatic pressure, where bentonite waterproofing or approved equal is required (including Commercial Building Basement slab and foundation walls).

RFI223: Is it acceptable to utilize sheet membrane waterproofing and blind side sheet membrane in lieu of the bentonite waterproof. Bentonite waterproof is very sensitive to inclement weather, product is no good if it gets wet before backfilling is completed. Substitute product would be Carlisle CCW860 or Miraply or Grace Bithuthene 3000.

Response223: Substitutions will be considered following the submittal procedure post bidding process.

For the purposes of bidding, use the details/products specified in the construction documents.

RFI224: Crystalline Waterproof, please clearly identify areas and specific locations that are to receive crystalline waterproof.

Response224: Refer to spec section 071616 Part 1.2A for general description of areas - including but not limited to: interior surfaces of all elevator pits below grade, entry vestibule trenches, trench drains at Secondary Inspection and APHIS

RFI225: Based on the attached are the systems listed under 1.3 Work Under Other Contracts, C.

Concurrent / Future Work: Item # 1. Are the Security, telephone, data "and other systems listed in this paragraph" part of this proposal?

Response225: The design documents show the extent of all work to be performed by the General Contractor and subcontractors.

When other contracts are awarded by the Government for the systems identified in specification section 011000 Section 1.3.C.1, representatives from those contracted entities will participate in regular project meetings and will be required to coordinate with the GC and all subcontractors.

RFI226: Response 183 in Amendment #7 says that Door M167-3 is a FE/BR door. The door schedule does not show door M167-3 to be a FE/BR door. The Door Material column does show this to be a FE/BR door.

The details on sheet D AE591 for this door do not show a FE/BR door. Please advise if Door M167-3 is a FE/BR door and what details and door material are correct.

Response226: Correction - M167-3 is not FE/BR. Use Hardware Set 30.0. Refer to detail D3/DAE591 for header detail, C4 and D4-DAE591 for jamb details.

RFI227: Doors C100-1, M167-1, M167-2 show details B3, C1, E1/D-AE-622. These details are for a Forced Entry/Ballistic Resistant (FE/BR) door. The title of these details includes “1-HR FE/BR Glazing”. FE doors cannot be rated to 1 hour if they have glazing. Please advise what is the correct rating for these doors, e.g., 5 minutes or 15 minutes. These details also say “30mm security impact level III”. There is no “level III” for FE. Is this a reference to the BR rating of the glazing.

Response227: 1-HR rating is for fire. BR rating is UL572 Level 3. FE rating is 5 minutes.

RFI228: Please clarify the following: Hardware set 51.0 says that hardware is to be by the door supplier.

Please advise the following: · Is detention hardware required and · Is the lock mechanical or electric

Response228: Yes - detention hardware required. Lock is mechanical.

RFI229: Will the owner accept having the Virtual Construction Coordinator conduct BIM team coordination meetings via a virtual web-based platform, in lieu of being on site? Are there local provider systems that can meet high-speed connectivity and bandwidth requirements to support BIM services?

Response229: In order to gain a comfort level with these meetings, the first two BIM oordination meetings must be held on site.

Further BIM Coordination meetings after may be held via a virtual web-based platform in lieu of being on site.

RFI230: To keep BIM deliverables up-to-date for the owner at closeout, is it acceptable to begin the project with the most current BIM platform versions and then do a yearly updates?

Response230: This is acceptable and must be documented and updated in the BEP as changes occur over the project lifecycle.

GSA reserves the right to approve or reject version changes. Due to extensive security and testing requirements and license costs, GSA may not have the most up-to-date version of software.

RFI231: It is taking a lot of extra time to complete the take off and we have been requesting an extension of 2 weeks in order to do it with accuracy and with a competitive pricing. Your consideration to this request would be greatly appreciated.

Response231: No bid extension will be considered at this time.

RFI232: Regarding the Non-Intrusive Inspection Building; Various drawings reference “East and West” plan views (i.e. N MH 1 00, N SB 1 01, N SF 1 11, N EL 1 00 and others). Drawing N MI 7 01 shows a snow melt system and an emergency exhaust system and indicate “Typical of 2”. Drawings G CU 1 41 and G CU 1 43 show a double bay building with a common wall. Other architectural, structural, mechanical and electrical drawings show a single bay building. Drawings H CP 1 03, H CP 1 11, H CP 1 12 and H CM 1 04 all show a single bay building. It appears that at one time a double bay building was planned and the final plan changed resulting in a single bay building but the old notes pertaining to a double bay building were not removed from some of the drawings. Please confirm that the requirement is now for a single bay building.

Response232: Correct - current design is for a single bay only.

RFI233: Can you please clarify what brand of gate operators you would like used for this project?

Hysecurtiy brand gates are called for in the schedule on G SS 6 01 and in detail H SS 2 02 however the spec 1112000 is calling for door king brand. Please clarify.

Response233: Refer to spec section 111233 for automated gates - spec lists gates to be HySecurity StrongArm brand or approved equal.

RFI234: What BIM/CAD files will the owner/design team be providing to the contractor for the buildings and booths? 3D models, 2D CAD files

Response234: The design documents will be provided in their native formats.