Revit HMSG RFI Questions and Responses 283-420.pdf

RFI # Drawing/Spec Category Question Response by Response

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

Please define where the WMATA Zone of Influence for the yellow/green line tunnel below 7th Street overlaps with the project scope. Please provide any drawings showing location and depth of tunnel. Please confirm that the initial construction of the tunnel was bored and not an open cut. A/E

Regarding RFIs 283, 304, 401, 418: Refer to delegated design requirements in specification 315100, 2.1. A to E. The length of the tieback anchor is to remain within the SI boundary line. Given the depth and angle of the tieback, it should clear the zone of influence from WMATA tunnel. However, this needs to be confirmed by the delegated design engineer and submitted to WMATA for approval.

284 Please advise which AHJs will be required to review support of excavation shop drawings. SI Smithsonian Institution will be the AHJ reviewing SOE shop drawings.

Sheet C-106 note 45 calls out a 3” double check detector assembly and vault. The referenced DC Water Standard is DG- 23.03, which is for a detector check meter, not a double check detector assembly. This would seem redundant as there is already a 1.5” meter in place. Please advise. A/E

Intent is for Double Check Detector Assembly.

Please provide photos of control sample for slab and cubic material needed for the project for the Type 2A and 2B stone showing the acceptable range of the material. SI

Refer to response to RFI #282.

What is on the contract drawings isn’t everything that is currently on the existing building fire alarm system (MXL) in the HMSG. Is it SI’s intent to “convert” the existing MXL loops and provide MLC card(s) which would be located in the XLS panel and allow the MXL to be demolished and all the fire alarm control equipment would be on the XLS Desigo platform. None of the field devices would need to be changed out and that can be done as building is renovated or upgraded in the future. A/E

The design's intent is that all new work related to this project be connected to the existing XLS system panel. The XLS panel is located in the corridor outside of Security Office G36C on the basement level of the Hirshhorn Museum building. The MXL system will be retained, with the exception of device/equipment removal as indicated in the drawings.

The Specified pump FP2 for the south pool has 260 gpm discharge; however, the filter is rated for a max of 141 gpm.

There is a possibility that maintenance staff divert too much flow to the filter, which can be dangerous. Could you please confirm if the filter is fully compatible with the pump's design? A/E

The filter is fully compatible with the pump's design. Filter pump FP2 in controlled by a frequency drive. If the flows are reduced to the inlets, the frequency drive can be adjusted to a lower speed to tune the flow rate.

Please clarify the submission due date requirements for each format. Per the cover page of the initial solicitation and the cover page of Amendment #3 the proposals are to be submitted by 3pm EDT using a digital dropbox link and express mailed on or before the due date on separate flash drives. The response to RFI 109 instructs that thumb drive submission must be received prior to 3pm on the due date. If a digital submission is provided to the drop box link prior to 3pm on the due date, can the flash drive be delivered by COB (5pm) that day or do both the digital and physical submissions need to be received by 3pm? The logistics of a physical submission will be onerous if vendors withhold pricing until near bid time. OCON

The Flash drives can be mailed to the office via Express mail by next business day, Monday June 12, 2023 before 3PM. The digital submission will be sent to the Evaluation Team on the Bid due date and used for the evaluation. If any additional information submitted on the flash drive that was not in the electronic format you will be disqualified.

Drawing LJ201 shows root pruning the northern elm tree at the east apron prior to reaching the new 18” storm drain and double check detector vault installation. Note 1.04 also says that all utility installation to be installed via directional boring or root friendly (e.g. SSAT or vacuum excavation). If the roots are already pruned prior to reaching the limit of excavation for the utilities can traditional excavation methods be used? A/E

If the tree roots are already pruned in this specific area then traditional methods could be used, but require that an arborist be on site for that work, if not already. The 1.04 note is primarily referring to the utility trench along the perimeter wall.

J1 Bid Form includes separate columns for Labor, Material & Equipment. Please advise if it is acceptable to submit totals only per division rather than breaking each division down into three components. Additionally, J1 does not include space for the Options. Should Options be submitted on the same bid form or is there an alternate format that’s desired? OCON

See in attachments J1 Revision 1 of Bid Sheet in excel format for your use.

292 Specification 329100-1.7-B-2 refers to specification 329113.

Specification 329113 cannot be located. Please provide. A/E

This is a typo. It is meant to read section 329100. We will correct it in addendum #2.

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

Responses to RFIs 33 & 53 Refer to Project Manual Volume IV.

Please clarify where this document can be obtained. This cannot be located in what has been provided thus far on SAM.gov OCON

See project manual in DropBox link

Please confirm the duties of the Historic Preservation/Conservation Consultant and/or Historic Preservation/Conservation Support can be performed by staff of the General Contractor, as long as the personnel assigned to this position has the requisite qualifications and experience to oversee the work being performed by the Historic Treatment Specialist. SI

Confirmed.

Please confirm that the Key Subcontractor performing the work under 2.b, “Historic Preservation/Conservation Consulting,” is the same as the Critical Subcontractor performing the work under 3.a, “Historic Preservation/Conservation Support.” Please confirm that there is no difference between these two positions. SI

Confirmed, there is no difference between these two positions.

Per Specification Section 013591 "Historic Treatment Procedures," Section 1.6.A., please confirm that the qualifications for the Historic Treatment Specialist are intended to describe the qualifications for the Historic Preservation/Conservation Support and Historic Preservation/Conservation Consultant or if they are intended to describe the qualification requirements for the field supervisor for the subcontracted trades who will be performing the work under Specification Sections 030130, 040140.52, 040342, and

040343. SI

They are intended to describe the qualifications for the Historic Preservation/Conservation Support and Historic Preservation/Conservation Consultant.

Typically, the personnel who will be performing the work under Specification Sections 030130, 040140.52, 040342, and 040343 are subcontracted trades and this work is witnessed/evaluated/overseen by the Historic Preservation/Conservation Consultant or Historic Preservation/Conservation Support. Please confirm that Specification Section 013591 "Historic Treatment Procedures," Section 1.6.A. only applies to the Field Supervisor and his/her workers. SI

Yes, the personnel who will be performing the work under Specification Sections 030130, 040140.52, 040342, and 040343 are subcontracted trades and this work is witnessed/evaluated/overseen by the Historic Preservation/Conservation Consultant or Historic Preservation/Conservation Support. No, Specification Section 013591 "Historic Treatment Procedures," Section 1.6.A. does not only apply to the Field Supervisor and his/her workers.

Per Specification Section 013591 "Historic Treatment Procedures," Section 1.6 “Quality Assurance,” A.1. the Historic Treatment Specialist is required to have a full-time field supervisor and construct mockups. Please confirm that the Historic Preservation/Conservation Support and the Historic Preservation/Conservation Consulting subcontractors are not required to be on site full time, rather they are required to be on-site when preservation activities (defined in specification sections 030130, 040140.52, 040342, and 040343) are occurring. SI

Confirmed.

Please confirm that the Historic Preservation/Conservation Support and/or Historic Preservation/Conservation Consultant are only required to oversee the mockup process, not personally construct the mockups. SI

Confirmed.

50. Please confirm that the Key Subcontractor performing the work under 2.b, “Architectural Cast-in-place Concrete,” is the same as the Critical Subcontractor performing the work under 3.a, “Exposed Aggregate Cast-in-place Concrete.” Please confirm that the scopes are the same per Specification Section 033300 Architectural Site Cast and Cast-in-Place Concrete. If these contractors are identical, please confirm if the qualifications are to be submitted for each subcontractor section. SI

Confirmed, the key subcontractor performing the work under2.b, “Architectural Cast-in-place Concrete,” is the same as the Critical Subcontractor performing the work under 3.a, “Exposed Aggregate Cast-in-place Concrete.” Confirmed, the scopes are the same per Specification Section 033300 Architectural Site Cast and Cast-in-Place Concrete. The qualifications can be submitted in one section with a reference in the other pointing to where it is submitted.

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

Please reference New work note #11 on sheet G-004 regarding an allowance for repairs on 20% of the existing concrete walls.

Please provide more details on the types of repairs and quantities required, as well as sections for the repairs in order for us to be able to price the allowance appropriately. A/E

The only existing concrete elements to remain and possibly require repairs are the southern portion of the Jefferson Drive tunnel and the steps/walls/roof from the tunnel up to the museum plaza. These are shown on S103 and S231 and related sections and details.

Concrete repair details A5 & A8 are intended to be typical repair details on sheet S702. Specification section 030130 relates entirely to concrete repairs. New work note #11 will be removed from Sheet G-004. This revision will be in the Conformed Set.

We have tried to contact New Material Research laboratory and has not been responsive, can you provide a good contact for then so we can get a quote on the ST-7?

A/E

Please use the following contact:

Atsushi Ikudome New Material Research Laboratory 3-1-15-5F, Shirokane, Minato-ku, Tokyo, Japan 108-0072 mail: ikudome@shinsoken.jp tel: +81-3-5422-9686

303 Please clarify if there are any insurance or monitoring requirements associated with the 9th Street Tunnel. A/E No additional insurance or monitoring required.

The WMATA metro tunnels run under 7th Street. Please provide a drawing showing the location of the tunnels in order to determine if we will be working within the area of influence of these tunnels. A/E

See response to RFI 283.

Drawing A-222 reflective ceiling drawing depicts the entire south overlook ceiling being covered or having hanging mechanical elements, but all the structural drawings for the elevated deck and beams depict arch concrete. The only exposed concrete that would need to be sandblasted is beam B1. Now it would seem maybe because the decks/stairs/beams all need poured monolithic the arch concrete type is still required, but is sandblasting all of the deck/stairs/beams undersides required? A/E

The RFI is correct that quite a few elements are shown as using architectural concrete due to the need for placing them monolithically while only a portion is exposed. See S421. The architectural finish is only required at the exposed portion.

Drawing A-603 depicts embeds for a sculpture attachment. Is this the correct location and/or spacing for these embeds as it is almost the entire footprint of the north overlook stair landing at 18” on center? Additionally, detail K8/A-703 shows them as embeds above the slab, which will be extremely difficult to install and finish around. Can the embeds be either flush with the concrete surface, or better yet after set? A/E

Yes, the extent and location of the embedments is correctly shown on A603. The embedments are to be provided to facilitate future artwork installations. The concrete slab is sloping to drain. The embedments are elevated to provide a flat, even to the horizon surface which facilitates successful installation of future artwork. It's elevation off the concrete also minimizes water pooling on the plates.

307 Please clarify if the price will be evaluated based on the base bid or base bid plus the alternates. OCON Base Bid and Options 1 & 2

308 Please see the attached reinforcing bar product request and advise if acceptable. Refer to RFI response #271.

309 Please clarify if the exterior signage allowance includes or excludes contractor mark-ups. SI The exterior signage allowance should be a line item indicating the cost that will be paid to that subcontractor.

310 Please confirm that the contractor can tie into and utilize temporary power on-site without being charged usage fees. SI Confirmed.

Please reference RFI response 28. We have been advised that several waterproofing subcontractors will not propose on this project without confirmation that a substitution for CETCO will be approved. Products such as Carlisle Miraweld can provide the welded layer rather than tape. Please identify an alternate product that will be acceptable so that we can obtain waterproofing prices.

A/E

We understand that subcontractors and CETCO have had recent business disputes related to warranty enforcement; however, CETCO Coreflex 60 has a track record of successful performance where installed correctly.

Coreflex 60 is a composite membrane with an APC layer (modified bentonite) and welded KEE layer (a thermoplastic) eligible for a 15 year material and labor warranty.

Miraweld by Carlisle contains a thermoplastic sheet with welded seams, but does not include the redundancy provided by the modified bentonite layer present in Coreflex 60. Carlisle may allow for use of the Miraweld system in conjunction with their bentonite waterproofing system.

We recommend that the contractor coordinate with waterproofing manufacturers to provide an alternate system that includes performance similar Coreflex 60 (i.e., a thermoplastic sheet with welded seams and bentonite layer).

312 Please provide elevations and details of the bronze lettering needed for the fencing and project. A/E Exterior signage design will be provided as an ASI during construction. Refer to RFI #27 for allowance.

313 P-201 Please provide a detail for the modification of existing opening as required to receive larger piping and mechanical penetration sleeve seal. A/E

A detail is not required. Penetration sleeve submittal shall note required size of core drill.

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

314 SC-801

The CCTV camera schedule on drawing page SC801 lists one 3MP fixed dome camera, but a total of four 3MP cameras are shown in the device layouts and network switch schedule.

Please confirm the correct quantity of 3MP fixed dome cameras for this project. A/E

Quantity of four (4) 3MP Cameras.

315 SC-205 and SC-801 Card reader door T003 on drawing page SC205 shows a local alarm sounder, but the device is not listed in the Door Schedule on page SC801. Will this door require a local alarm sounder? A/E

Yes. Provide local alarm sounder as shown on drawing SC205.

316 A-213 Please provide a basis of design for the 8' x 2' workstation.

Please confirm that the workstation is furnished and installed by

GC. A/E

Workstation is furnished and installed by owner.

317 E8/A-320 Please confirm that it is acceptable to miter cut and shop epoxy at the countertop corner turns for constructability purposes and to reduce material waste. A/E

The bidder is referring to detail E8/A730 rather than noted as E8/A320 which does not exist in this set. Miter cut would not meet the aesthetic goals. Butt joints are acceptable.

318 Please provide cut sheets for all site light fixtures. A/E Refer to project manual appendix A4.

Request-to-Exit motion detectors are shown in the security riser diagram and ACS door typical layouts, but only 3 doors are noted as having REX functionality in the door schedule. Please confirm correct REX device types and quantities. A/E

The Request-to-Exit devices shown in the door schedule are integrated with the electrified lock. There are a total of six (6) PIR Request-to-Exit devices (DS-160 or DS161 or approved equivalent). These are shown on floor plan drawings SC204 and SC205. Refer to Specification 281515 for additional information on the PIR Request-to Exit devices.

320 Guard Booth Please provide a BOD manufacturer and model number for the intercom in the guard booth. A/E Refer to specification section 284917 article 2.4 (addendum #1 issuance) noting Manufacturer: Zenitel, Model #: ITSV-5.

321 Guard Booth

In reference to RFI 173, please provide a manufacturer system and sizing for the 4-pipe heating and cooling systems in the guard booth as BOD BIG Manufacturing is unfamiliar with this system. A/E

Design of the Guard Booth HVAC systems is delegated to the manufacturer.

322 Guard Booth

Please confirm that a wall mounted air conditioner combination heater will be acceptable for the Guard Booth HVAC requirement. This system does not require a condenser on the outside or a 4 pipe HVAC connection. A/E

A wall-mounted unit would not be an acceptable product given its aesthetic impact to the guardbooth.

323 Demo Please confirm if salvaged material should be handed over to SI, or if it should be stored by GC for reinstallation. A/E

Refer to Supplemental Conditions #25 which notes salvage to be provided to owner, all salvaged materials for reinstallation are the responsibility of the GC.

324 Please provide clarity on what is desired for the exterior paint mockup as noted in spec 099113-1.5A. A/E Provide 5 linear foot length paint mock-up on light housing at the reflecting pool.

325 A-721, A-722

Detail G5/A-722 calls out a waterproofing membrane at the security gate pipe recessed pockets. Please confirm that this waterproofing membrane should be cold fluid-applied waterproofing. A/E

Correct, that membrane shown is a cold-fluid applied waterproofing.

326 77129

Spec section 077129 for manufactured roof expansion joints.

However, no roof expansion joints are called out or details shown on the drawings. Please advise of this spec section applies to the project and where it applies. A/E

The expansion joint described in the specifications applies to the joints present at the tunnel lid, refer to detail J6/A-705. We will rename this "flanged roof expansion joint" on the drawing in the conformed set.

327 C-104 Drawing C-104 and detail E4/L700 calls out Lawn Drain Pipe, but there is no pipe size provided. Please confirm the size of pipe. A/E

The pipe size should be noted as 6", 152mm.

328 Air Barrier

Air barrier is shown and called out behind the art walls in the main passage. However, no specification section is provided for Air Barriers. RFI #144 stated that the product information will be provided in upcoming Addendum, however this information was not provided in Addendum 3. Please provide product information for the Air Barrier. A/E

Refer to addendum #1 Specification 072600. Article 2.01 B includes the product for the vapor retarder/air barrier sheet.

329 Doors Door schedule on A-800 calls out doors GCR1A and GCR1B.

However, these doors are not shown on the floor plans. Please identify where GCR1A and GCR1B go. A/E

Drawing A214 shows these doors in the GCR1 Corridor. Detail J6/A800 shows its typical detail. Sheet A214 will be edited to clarify door numbers in the conformed set

330 Doors

Doors schedule on A-800 references A2/A726 for the jamb details for exterior doors G003A and G003B. However there is no A2 on sheet A-726. Please advise if detail B4/A-727 should apply here or provide the applicable detail. A/E

Doors G003A and G003B should reference detail A1/A725 and B4/A727. The schedule will be updated in the conformed set to show details referenced.

331 31000, K1&H1/S-451

Reflecting pool sections K1&H1/S-451 show the 9" SOG as un-supported slab on grade with no base fill and no auger piles required for support. Please specify what type of base fill is required for the pool's SOG. A/E

Slabs on grade are supported by the subgrade. See Earth Moving specification 312000 for subgrade and drainage layer requirements.

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

332 71700, K1&H1/S-451 Please provide product specifications for the water stop material called out on the reflecting pool sections K1&H1/S-451. A/E

See specification section 031000, Concrete Forming and Accessories, section 2.3

333 71700, E1/S-701

Section E1/S-701 shows two water stop systems, a bentonite strip water stop, and a PVC dumb-bell type. Specification 071700 only references the bentonite strip water stop material.

Please confirm that the PVC dumb-bell water stop is not required for keyed construction joints in foundation walls and for any non-architectural crack control joints in foundation walls. A/E

The detail should only include the bentonite strip water stop. The others will be removed and correct in the conformed set.

334 32000

Concrete subcontractors have expressed concerns regarding possible coating issues when using the specified galvanized tie-wire. Please confirm if epoxy-coated tie-wire is acceptable to use in-lieu of galvanized tie wire. A/E

No. It is not acceptable. Note that even the submitted manufacturer's spec from CMC (rfis 271, 308, 407) calls for galvanized tie wire.

335 S-900, A-801

General note #8 on S-900 calls for a required shake-on concrete floor hardener. However, the finish material schedule on A-801 does not reference a shake on product for exposed to traffic concrete floors. Please confirm that the mentioned shake-on hardener product is not required.If required, please specify the product color, and advise if a sealer is required where scheduled. A/E

The shake-on hardener product is not required. This reference will be removed in the conformed set drawings.

336 S701 Note#2 on detail J1/S-701 references an alternative pattern requirement for slab placement. Please confirm there is no time adjacency constraint(s) between slab on grade pour(s) areas? A/E

There is a spelling error in the note. It should read "2. Place slab on grade in alternating pattern with at least 24 hours between concrete placements. Provide construction joint between pours." We will correct note in the conformed set.

337 S701

Please confirm weld at base plate on detail A4/S701 should be identified as field weld as per detail A9/S701. Also, please confirm intent is that all features and angles depicted as attaching to concrete embedded base plates shall be field welded after embedment. A/E (omission)

The welding notes on the two details should be the same and as suggested by the rfi. We will clarify/correct in the conformed set.

338 E9/S-502 Please confirm that Geofoam EPS-15 can be used for the uncompacted fill called out in section E9/S-502. A/E

The uncompacted fill is to separate the stone wall footing & below grade stem from the adjacent perimeter wall. It is a limited quantity.

Geofoam EPS-15 should not be used. Refer to specifications for approved materials.

339 S-403, S-201

Several notes on S-403 refer to S-201 for the extent of flowable fill. However, no direct reference to the extent of flowable fill is shown on S-201. Please confirm that the notes on S-403 should be referencing S-202 for the extent of flowable fill. A/E

That is correct, they should reference S-202. We will update in the conformed set.

340 Concrete Please provide a typical structural detail for the required housekeeping pads. A/E See detail 7/P502.

341 042200/2.5

Specification section 042200/2.5 requires masonry walls splice bars reinforcement to be uncoated bars, and requires all dowels to be hot-dip galvanized. Please confirm that all masonry reinforcement to be uncoated. A/E

We do not see bidder referenced uncoated splice bars in specification as noted. Requirements shown in specification shall be maintained.

342 SC702/F9

The top plate on this security camera pole appears to be a custom plate. Assuming it is not, can the government provide a manufacture and part number for the pole shown in the Detail?

What is the What is the height requirement of the pole. A/E

It is a custom plate. Refer to Architectural drawings for additional information.

343 SC702/F9 If there is no manufacture or part number associated with the F9 Detail pole, please provide direction as to what to provide. A/E

It is a custom pole. Refer to Architectural drawings for additional information.

344 A-410

A1,A6/A-410 calls out snow melt in 1-1/2" topping slab, but the details in the landscape drawing such as J4/L600, E1/L600, etc.

do not show the snow melt. Please clarify and provide typical paving details for this snow melt system. A/E

The snow melt goes in the topping slab under the drainage mortar. RHI will add a detail to show this typical condition with a 1.5" topping slab in the conformed set.

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

345 Spec 104400, A-214

Keynote 21.01 on B1/A-214 indicates that there are two fire extinguishers in AV/IT Room TIT1. There is no Keynote 21.04 shown on B1/A-214 for water mist fire extinguishers.

Specification 104400 2.3D states "In addition to the clean agent extinguishers indicated, provide one (1), UL listed, 2A water extinguisher for each IT room." Please clarify the quantity and types of fire extinguishers required in AV/IT Room TIT1. Please advise if any fire extinguishers are required in other IT rooms. A/E

Two fire extinguishers are shown in the drawings on A214 for the AV-IT room. Two fire extinguishers are noted in the specifications for South Overlook AV/IT Room (2A:10B:C clean agent and 2A water). There is only one AVIT room in the project. As noted in Section 104400 Article 1.5 D "Provide a clean agent, water mist or CO2 portable fire extinguisher and one water extinguisher for class A fires in all IT specs. Dry chemical extinguishers shall not be permitted."

346 Spec 104400, A-213

Keynote 21.04 on F1/A-213 indicates that water mist fire extinguishers are required but specification 104400 2.3-B indicates that only dry chemical fire extinguishers are required at the north overlook. Please clarify whether the water mist fire extinguisher(s) shown on A-213 are required.

A/E

Fire extinguisher (water mist) is only required in room SG001. As noted in Section 104400 Article 1.5 E "Exhibit display areas and ordinary collection storage spaces shall be provided with water mist type portable extinguishers. Dry chemical extinguishers shall not be permitted in these spaces." The 2.3 B reference is for the other spaces in the North Overlook. We will update SG001 in the specs to note: Minimum extinguisher rating 2A (water mist) per NFPA 10. Coverage area of 139 square meters (1500 sf) per unit of A. Maximum floor area per extinguisher 1045 square meters (11,250 sf). Maximum travel distance to extinguisher 22m (75 ft).

347 32 91 00

Specification 32 91 00 section 1.4A references Specification 32 95000 Vegetated Roof Assemblies. Please confirm that this specification is not applicable to this project or provide this specification. A/E

This is not applicable.

348 G-004

New work note #9 on sheet G-004 references a general cleaning requirement on all existing-to-remain concrete surfaces. Please confirm that the only existing to remain concrete surfaces are the tunnel's main passage walls and ceiling. Please also confirm that no existing concrete to remain that will be covered up needs to be cleaned such as the walls behind the tunnel stainless steel art walls. A/E

(1) Refer to response to RFI #73. (2) No, all existing to remain concrete is to receive a general clean per note #9.

349 G-004

New work notes #10 & #11 on sheet G-004 references a specialized 20% cleaning allowance of the existing concrete walls and ceiling of the main passage and plaza opening. Please provide more information on the extent of these repairs as the 20% allowance will vary based on the amount of repairs needed. A/E

For New Work #11 refer to RFI response #301. For additional information about existing conditions for cleaning refer to Appendix - Existing Conditions, Cleaning Trial Outcomes, and Recommended Treatments Report

350 32 91 00 Section 3.2 of specification 32 9100 refers to Landscape Drawing L-200SP. Please provide drawing L-200SP or confirm if this is intended to refer to L-200. A/E

Refer to response to RFI #277

351 RFP 52.219-S0097

Page 61 of the RFP 52.219-S0097 Small Business Subcontracting Plan E states "10%_ a minimum of the planned subcontracting dollars to be placed with small disadvantaged small business concerns to include: HBCU/MI's." The definition of how subcontracting dollars could fit the category of HBCU/MI is not clear. Does the owner of the subcontracting firm need to have graduated from an HBCU/MI? If so, does the entire 10% for the small disadvantaged small business contribution need to be from firms owned by graduates from HBCU/MI's? Please clarify this specific small business participation requirement. OCON

Historically black college or university means an institution determined by the Secretary of Education to meet the requirements of 34 CFR 608.2. Minority institution means an institution of higher education meeting the requirements of Section 365(3) of the Higher Education Act of1965 ( 20 U.S.C.1067k), including a Hispanic-serving institution of higher education, as defined in Section502(a) of the Act ( 20 U.S.C.1101a). 10% minimum of the planned subcontracting dollars to be placed with HBCU/MI's for research, studies, supplies, or services of the type normally acquired from higher educational institutions. FAR 19.7, FAR 52.219-9, Statutory Requirements of Public Laws 95-507, 99-661, 100-656, and Executive Order 13360.

352 RFI 33

RFI 33 response references "Project Manual, Volume IV, A7 Construction Schedule." This information cannot be located.

Please provide this information. OCON

FAR 19.7, FAR 52.219-9, Statutory Requirements of Public

353 LJ201

Please note in Addendum 1 keynote numbers disappeared, certain text has become illegible, and line types changed. Please provide an updated version with keynote numbers added back in and text legible. A/E (error)

Laws 95-507, 99-661, 100-656, and Executive Order 13360.

354 32 14 00

In regard to Spec. 321400, Section 2.2; Subsection A.2 Kyoto Machiya Granite Pavers provided by New Material Research Lab located in Japan. Local subcontractors have had difficulty contacting this supplier and getting quotes. Please confirm if a local alternate can be used. SI

Refer to response to RFI #302. Local alternative cannot be used.

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

355 L-800 L-800 has a note that groundcover planting will be issued as an ASI. Please confirm if this will be issued prior to bid day. A/E No, this will not be issued prior to bid day. L800 notes what should be included for bidding purposes.

356 A1/L-700 Please clarify size, type, and color of [517] Millennium Granite Decorative Aggregate, reference detail A1 on L700. A/E RHI: 329300 Spec section will be updated to include the aggregate material properties. Refer to updates in addendum #2.

357 32 14 00

In Spec Section 32 14 00, subsection 2.6.B, calls for the specified Drainage Mortar System to be tested with ASTM C67- C666 test method. This test, C67-C666, is for concrete and not mortar. Please advise if there is there another test to consider or if this will be a requirement for the in place mortar bed. A/E

The system must be tested as specified. It is not a traditional mortar bed installation.

358 32 14 00

In Spec Section 321400, subsection 2.6 calls for a Drainage Mortar System. The Bases of Design for the Drainage Mortar is a sole source material called out as supplied by Romex Northeast, USA. In speaking with them, their system is very expensive (compared to traditional mortar setting beds) and it directly bonds to concrete substrate below it.Please confirm this is the design intent or advise if an alternative product can be used. A/E

This is the design intent. Traditional mortar setting bed is not an acceptable alternative.

359 RFI 92

RFI 92 response references "Project Report, Appendix, Section A6 Appendix B." Project report cannot be found in the Addendum 1 information provided. Please provide this missing information and its specific Appendix location. OCON

See project manual in DropBox link

360 TA-201

Construction Drawing TA-201 indicates two (2) Tunnel Input boxes labeled “AV2.” Construction Drawing TA-101 does not include any “AV2” indications. Please confirm there are to be no “AV2” Tunnel Audio I/O boxes included. A/E

Correct, the Tunnel Input Panels were removed from plan. They will be using a standalone PA speaker with its own inputs. We will update TA201 in Addendum #2.

361 TA-201

Construction Drawing TA-201 indicates two (2) wireless microphone antenna coax cables for the wireless antenna system. Construction Drawing TA-101 does not provide any indication as to the desired antenna locations. Please clarify the desired location for the wireless microphone antennas, and what kind of plate is to be provided to support the coax cable infrastructure. A/E

There is to be a 1-gang backbox and 1" conduit to support each antenna. Placement will be determined by architect in field.

362 SC705

There are discrepancies between the Fiber/network diagram and the Video surveillance system communications diagram with regards to the fiber media converters. a. On lower-level Security equipment room it does not show a media converter on the fiber diagram and appears to connect directly to the OPS security switch via Fiber. On the Video diagram it shows a fiber media converter. b. Also, in closet G021 and SG002A on fiber/network diagram shows a Fiber converter modules Symbol but not shown on the video Diagram and Closet EP4NE does not show a Fiber converter module on either diagram. c. Please advise where media converters will be needed. A/E

Fiber/network diagram detail G1/SC705, The FM symbols adjacent to network switches 001 & 002 are fiber SFP ports specified in Specification 280531.10.

Fiber/network diagram detail G1/SC705, FM symbol adjacent to the FPP in the Guard House is an 8-port fiber module. Refer to Specification 280531.10 for additional information.

A fiber media converter is not required in the lower level security equipment room.

363 SC801

There are camera count discrepancies between the camera schedule: (22) cameras while the network switch schedule is listing (25) cameras. Please confirm which is correct A/E

Network switch schedule is correct.

364 SC704

Drawing SC704 indicates the DGP panels at a quantity of 6 and

7. However, Drawing SC204 shows number 8 and 7 above it and another on Drawing SC205 does not have an assigned number. Please advise of the correct total of DGP’s. A/E (error)

There are a total of (2) DGP's (HM006 & HM007).

365 SC202

There are boxes with question marks called out and what appears to be an electrified lockset in the bottom right of SC202.

Please clarify what the intent of these markings are. A/E

The question marks are a visibility issue where a room tag lost its host in the model.

The electrified lockset is a visibility issue. This is the Door T002 electrified lockset (SC205).

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

366 SC206

Keynote 2 states a 4-Port network switch and UPS.

a. Where will these devices be mounted in? No enclosure is identified, and it does not appear that a rack is existing in that closet. Drawing SC401, A7 states wall space is limited.

b. Please advise will be a part of the Contractor scope vs what will be in place or by the owner as part of the existing Museum security system. A/E

(a) The 4-Port network switch shall be installed within the existing enclosure. There is no room within the existing enclosure for the UPS.

UPS will be placed on the floor. (b) The contractor is to provide what is shown on the drawings and what is within the specifications. SI OPS Admin and the contractor will need to coordinate IP addresses and connections to the OPS network.

367 SC202

There are boxes with question marks called out and what appears to be an electrified lockset in the bottom right of SC202.

Please clarify what the intent of these markings are. SI

Refer to response to RFI #365.

368 SC202

There is an icon for Keynote 1 near the bottom right corner of SC202 that is beyond the match line and appears to be a mistake. Please confirm if this keynote is intentional and what the intent is. A/E

Keynote 1 is a visibility issue and belongs to the element shown on SC203.

Keynote 1 text shown on SC202 belongs to drawing SC204.

369 28 05 07.10

Factoring in the 1.5 hours battery backup requirement and the racks currently being shown,there is potentially an issue with the space available in the equipment racks described.

a. Please verify the time requirement is in fact 1.5 hours as identified in Specification Section 280507.10 – 3, 2.3 E: “Provide battery modules to enable a minimum of 1.5-hour backup.” A/E

Provide battery back-up as specified within Specification 280507.10.

Please provide current available power source contractor can use for its operations, including amperage and voltage. Please confirm source will come from a current Smithsonian metered system in the Hirshhorn Museum. SI

Current available power source, a 150-kVA transformer with a 120/208-volt wye secondary, is located in the tunnel electrical room on the south side of the garden. Refer to electrical drawings. During initial demolition work, Contractor may connect to that equipment.

Coordination of demolishing existing source and providing new connection to new source installed under this project is up the GC. GC shall submit shop drawings for review of GC connections to Smithsonian electrical system. Smithsonian will not charge for construction electrical power usage.

371 Please provide current available water source contractor can use for its operations. SI

Current available water source is located in the garden. Refer to plumbing drawings. Coordination of demolishing existing source and providing new connection is up the GC.

372 S-241 Detail A1/S-241 calls for a 14" "perpendicular wall", please provide a revised detail that shows how this wall attaches to the side wall.

A/E

There is no detail A1/S241. However it is assumed that the bidder is referring to one of these two drawings. The 14" cross walls along the west side of the garden on S-241 are shown on the plan sheet and rebar called out in sheet note 11. Plan detail D9/S441 shows the connection of those cross walls to the main walls. If this comment is referring to the buttress walls along the south side of the garden on S-241 and shown in detail A1/S401, the reinforcing for those 14" perpendicular walls is given by a plan note on S241 at approximate location B9.

373 Below Grade Waterproofing

Several details (ref: G9, D9, K9/A-702 and D10/A-701) show the blindside waterproofing and the positive side sheet waterproofing/membrane flashing interacting with each other.

The basis of design for the blindside waterproofing is a Cetco product while the basis of design for the positive sheet waterproofing is a GCP product. We understand that the use of two product from different manufacturers will result in a warranty issue as each manufacturer will be unwilling to provide a full warranty since they cannot guarantee the other manufacturer's products. To maintain full warranty for the below grade waterproofing system, please confirm that we can use GCP products for both the blindside and positive side waterproofing. A/E

Major blindside waterproofing manufacturers offer an equivalent positive side bituminous self-adhered sheet. Provide self-adhered membrane sheet with the blind side waterproofing to obtain a sole-source warranty. Cetco's self-adhered membrane sheet product is Envirosheet.

374 Rainwater Collection System

The specification for the rainwater harvesting system calls out specific brands of components. There are several of these components that are not made in America. Further, there are several types of equipment required by this design that do not have American manufacturers. Does the rainwater harvesting system have to comply with the Buy American Act? A/E

Yes, the system must comply with the Buy American Act. Note exceptions (article 25.103) in the Federal Acquisition Regulation (FAR) which states that "When one of the following exceptions applies, the contracting officer may acquire a foreign end product without regard to the restrictions of the Buy American statute: (b) None availability. The Buy American statute does not apply with respect to articles, materials, or supplies if articles, materials, or supplies of the class or kind to be acquired, either as end items or components are not mined, produced, or manufactured in the United States in sufficient and reasonably available commercial quantities and of a satisfactory quality."

375 Bid Form Several RFI responses indicated a Revision 1 Bid Form would be issued to account for Bid Options and Unit Pricing, but this could not be found. Please provide updated Bid Form. OCON

Bid Form Revision 1 in Attachments

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

376 28 10 00

The model numbers for the Card Reader in section 2.5 and Card Reader Keypad 2.7 starting wit SWH have been obsolete without a replacement and the Identity readers the manufacturer suggested sending an RFI on the TS449 Extension. They stated this could be some sort of custom card format. Please advise on correct part numbers. A/E

The following products from Identiv are appropriate substitutions given different installation conditions:

8110ABP0YLT TRN:TS449 Smithsonian Configuration – TS WMOUNT STD HFLF PIGTAIL 8110ABT0YLT TRN:TS449 Smithsonian Configuration – TS WMOUNT STD HFLF TERMINAL;

8102ABT0AYT TRN:TS449 Smithsonian Configuration - TS ADVANCED RDR-TERM-WALLMOUNT-GOV (PINPAD READER)

377 For the above ground sanitary, are standard no hub couplings for the cast iron allowed in lieu of Hymax coupling (specified) A/E

Standard "no hub" couplings are not allowed per Smithsonian standards. Provide Hymax couplings only.

378 Please provide the approved DDOT traffic control plan for this project. A/E Contractor responsible for Traffic Control Plans. Refer to specification 010000, section 22.1.

379 Please provide a specification for the underground chilled water and heating hot water piping A/E We will provide specification 232115 in addendum #2.

380 M-203

Drawing M-203 shows a 1.5” CS & CR leaving the TTR1 Trash room. The drawing indicates that the continuance shall be found on the civil drawings, but could not be located. Please provide detail. A/E

AMT: – C104 (West Gallery) and C105 (Central Gallery) will be updated to show continuance of 1.5” (40mm) chilled water supply/return lines, from TTR1 Trash Room to North Overlook Support space.

This will match the M-203 (South Overlook) to M-204 (North Overlook) drawings. Refer to future conformed set updated drawings.

381 M-203 Drawing M-203 shows PUH-1 with a hot water feed. The schedule indicates differently. The schedule indicates this unit to be 3.0 KW electric. Please advise which is correct. A/E

PUH-1 is an electric unit heater per the schedule. The scheduled unit is correct.

382 M-203 Please provide a detail for connection for the Guard Booth Manufacture provided HVAC Unit. A/E Detail for connection to the guard booth manufacturer's equipment shall be provided by the guard booth manufacturer.

383 H1/S-441

The detail shows architectural concrete the full length of the walls, including the portions of the wall below ramp slabs. These sections of the walls will be buried below the ramps and will not be visible to the public. Can the portions of the wall that are not visible (i.e., below the ramp slabs where applicable) be structural concrete in lieu of architectural concrete? Section H9 Sheet S- 441 considers the west wall (adjacent to the 9th St tunnel) as structural concrete below the slab and architectural concrete above. A/E

No, the east and west walls referenced in H1 must remain architectural concrete.

384 Rainwater Collection System

The specification for the rainwater harvesting system calls out specific brands of components. There are several of these components that are not made in America. Further, there are several types of equipment required by this design that do not have American manufacturers. Does the rainwater harvesting system have to comply with the Buy American Act? SI

Refer to response to RFI #374.

385 A-710 Sheet A-710 notes ST-2A and ST-5 for the reflecting pool. L-211 Callout 519 refers to stone type 4 in the reflecting pool. Please clarify what stone is to be used in this location. A/E

L-211 Keynote 519 should refer ST-5 as referenced on sheet A801 material schedule, A710 legend and in specification A44200 Article 2.2B3. This is the stone for the reflecting pool basins.

386 C-103 Please confirm if new soil can be used in lieu of salvaging the existing planting soil and reinstalling. A/E Confirmed, use of same approved soil for the project is acceptable.

Question: Please provide contact information for the New Material Research Laboratory. Bidders are not able to reach them at the phone number provided in spec section 321400 nor at their mail@shinsoken.jp email address. SI

Refer to RFI #302 response

Response to RFI 92 refers to Project Report, Appendix, Section A6. Please clarify where this document can be obtained. This cannot be located in what has been provided thus far on SAM.gov OCON

See project manual in DropBox link

Standard Form 1442 issued with Amendment #3 still lists the bid date as 5/25/2023. Please provide updated form with revised bid date. OCON

See 2nd Revision of SF 1442 in Attachments

333302-23RF-0010010 Revitalization of the Hirshhorn Museum Sculpture Garden

REQUEST FOR INFORMATION

Specification 083300-1.7 Mock-ups lists to construct mock-ups of a “large scissor gate” and “retractable gate at base of stairs.”

a.The specification is for an open-curtain grille. A new scissor gate cannot be located on the drawings. Please advise where the scissor grille is located and provide specification.

b.For any security gate mock-ups that are required, can these be incorporated into the final work?

A/E

(a) Refer to keynote 08.06 "side-activated security grille. 2 part security curtain. 49'-0" w x 9'-6" H each" indicated at the north side of the south overlook tunnel (b) Yes, Mock-ups may be incorporated into the final work if it is approved by COTR. We will update the spec section in addendum #2 to reflect this change.

The specification for the rainwater harvesting system calls out specific brands of components. There are several of these components that are not made in America. Further, there are several types of equipment required by this design that do not have American manufacturers. Does the rainwater harvesting system have to comply with the Buy American Act? SI

Refer to response to RFI #374.

The lighting fixture schedule from spec section 265100 notes “Handrail fabricator to deliver prewired handrail to jobsite. EC is solely responsible for the electrical infrastructure from lighting panel to conduit and low voltage wire from remove power supply to exterior junction box to connect pre-wired handrail assembly furnished by handrail fabricator” for fixture type FA. Industry standard is to deliver the handrail to site, and then have the electrical contractor provide a complete wiring on site. Please confirm an onsite installation of the handrail lighting fixtures is acceptable. A/E

Provide shop drawings for both disciplines to show that both elements work together to meet design requirements. Specific sequencing of assembly is the contractor's responsibility.

Specification 031000-2.4-E-3 Instructs to furnish form ties with integral water-barrier plates at walls indicated to receive damproofing or waterproofing. Several Concrete bidders have expressed confusion/unfamiliarity with a product that meets this requirement. Please provide basis-of-design for this product. A/E

The water barrier plates for the form ties should be removed. This will be noted in the conformed set.

Construction Drawing TA-201 indicates two (2) Tunnel Input boxes labeled “AV2.” Construction Drawing TA-101 does not include any “AV2” indications. Please confirm there are to be no “AV2” Tunnel Audio I/O boxes included. SI

Refer to response to RFI #360

Construction Drawing TA-201 indicates two (2) wireless microphone antenna coax cables for the wireless antenna system. Construction Drawing TA-101 does not provide any indication as to the desired antenna locations. Please clarify the desired location for the wireless microphone antennas, and what kind of plate is to be provided to support the coax cable infrastructure. SI

Refer to response to RFI #361

Please clarify the specific tasks that require use of the specified Conservator team member and can they perform any remedial work. A/E

Refer to specification sections including but not limited to 040140.52, 040342, and 040343. Refer to Existing Conditions, Cleaning Trial Outcomes, and Recommended Treatment Reports located in the specifications Appendix.

New work note #11 on sheet G-004 regarding an…