140P2021R0055-0005_Att01-QuestionsAndResponses-Final_01-31_210713_0005.pdf

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INDE-224697/176914/177564, Second Bank Projects
Solicitation number
140P2021R0055
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This document provides details for a federal solicitation to restore structures at Independence National Historical Park in Philadelphia. The solicitation number is 140P2021R0055 and seeks bids for restoration work on the roof, exterior marble, and wood windows of the Second Bank of the United States building. This project is being conducted by the National Park Service under the Department of the Interior. Specific restoration services required include repairs to the roofing system, exterior marble features, and replacement of deteriorated wood windows. Responses were due by January 31, 2022, with the award date to be determined. The opportunity notice identifies the relevant federal agencies and provides location and background information on the historical structures to be restored.

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140P2021R0055-0005_Att03-RevDrg_391-168574_SubsheetA8_2_210712_0005.pdf PDF
140P2021R0055-0005_Att06-RevSpec-013592_CollectionMoveAndStorageProcedures_210713_0005.pdf PDF
140P2021R0055-0005_Att05-RevSpec-040140_52_StoneMasonryCleaning_210712_0005.pdf PDF
140P2021R0055-0005_Att04-1964RoofReplacementDrawingsAndSpecifications_640518_0005.pdf PDF
140P2021R0055-0005_Att07-Drg_391-168574_SubsheetA1_5VendorMarkup_210708_0005.pdf PDF
140P2021R0069-0005_Att08-WD_PA03_Philadelphia-Bldg_210709_0005.pdf PDF
140P2021R0055-0005_Att02-RevDrg_391-168574_SubsheetG0_0_210712_0005.pdf PDF
140P2021R0055-0004_Att04-2004SecondBankStoneSurvey-FinalReport_040601_0004.pdf PDF
140P2021R0055-0004_Att01-ClausesAndProvisions-Revised_210702_0004.pdf PDF
140P2021R0055-0004_Att05-FinalPDReport-RoofAndAssociatedFeatures_200414redacted_0004.pdf PDF
140P2021R0055-0004_Att06-WD_PA03_Philadelphia-Bldg_210702_0004.pdf PDF
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140P2021R0055-0004_Att02-QuestionsAndResponses_01-24_210702_0004.pdf PDF
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140P2021R0055 Questions and Answers – Amendment #0005 07/13/2021

The following is a consolidated list of all vendor questions submitted prior to the submission deadline.

Responses in red address questions from this amendment or provide updated responses for this amendment.

1. Specification calls for new sash to be counterweighted within 5 lbs. of original weight. Given that they will be Sapele with IGU it is unlikely this will work. We usually fix the top sash in place and hang the bottom sash only which gives us room to add enough weight to make the bottom sash operational. Please advise.

Response: If operable double-hung windows cannot be achieved at window Type D, NPS will accept a fixed top sash and operable bottom sash as an alternative.

2. What is the weight limit on the elevated pavers around the building? Is it acceptable to forklift a

4500 lb. boom lift onto the platform to access the windows?

Response: Spec section 01 11 00 states “Contractor to evaluate the weight limits of the existing pavers and pedestal prior to construction activity. Contractor to provide these weight limits in writing to the Contracting Officer if the Contractor intends to store materials or place equipment (including scaffolding) on the pavers or pedestal.” Previously, during the condition assessment survey, a Skyjack SJ46 Articulating Boom, 52’-3” working height and a JLG 800AJ Articulating Boom, 86’-6” working height were used with TrakMat, heavy duty polymer mats made to protect hard and soft scape surfaces from heavy duty construction equipment. This equipment fit through the gate openings and was only driven at the sidewalk level, not on the elevated fiberglass pavers around the building. Contractors are welcome to evaluate with their own engineer if they feel they cannot avoid putting weight on the pavers in their staging and in the performance of the construction work.

3. Lead is mentioned in the contract docs, are they calling for abatement on the window frames or just “lead in construction” care to be taken?

Response: The hazardous materials approach for the lead paint at all wood elements not being replaced is encapsulation. All construction activities related to the elements with hazardous materials should follow the requirements of the specifications for lead and asbestos-containing materials handled during construction.

4. Spec section 10 81 13-4, part 2.1A states: Manufacturer and System: Provide PermaNet plastic netting bird control system as made by BirdMaster, 13 Linnell Circle, Billerica, MA 01821 (800-562- 2473), or approved equal. Do you have a list of approved equals that you are able to provide? We have 2 other bird netting companies stating that they can provide the exact specified netting and associated materials but will not bid because with their past experience, the NPS will only accept BirdMaster. Can you please confirm?

Response: NPS will accept alternative bird netting products as long as they meet the performance criteria in the Specifications, Section 10 81 13 and fulfill the warranty with respect to the use of existing anchors.

5. I was hoping someone would be better able to explain the Report on Limitations on Subcontracting form that is to be submitted with our bid for the above project. What is the participation % we are required to meet? It says the percent is noted in line 4, but there is no percent there.

Response: Per the line below the Corrective Action Plan in the “Report on Limitations on Subcontracting” worksheet. the Participation Percentage noted in Line 4 should calculate to be “at least 15% of the cost of the contract, not including the cost of materials, with its own employees” as described for general contractors, paragraph (c)(3) in FAR 52.219-14, Limitations on Subcontracting, which was incorporated into the contract clauses by reference.

6. CLIN 22 Says to replace selected wood window in basement and CLIN 28 says to replace the basement windows.

Response: The windows are identified in Specification Section 01 27 00, Definition of Contract Line Items. CLIN 22 identifies the windows as follows: “This item consists of replacing two of the wood window sashes at the basement (windows 008 and 009) including glazing, surrounding trim, and sills and providing treatment as defined on the Drawings.” CLIN 28 identifies the windows as follows:

This item consists of replacing the wood window sashes at the basement (windows 001 through 007 and windows 010 through 014B) including glazing, surrounding trim, and sills and providing treatment as defined on the Drawings.

7. What is the size and weight limit of the elevator mentioned?

Response: The interior of the elevator cab measures approximately 80” wide by 42” deep. Signage in the cab states that the elevator capacity is 3,000 lbs.

a. Please provide door dims.

Response: Elevator door dimensions are approximately 48” by 84”.

8. How long will the items be in storage off site for?

Response: The items will be in storage for the duration of the construction project, and will then be returned to the park at the end of construction. The contract price schedule has this broken out in months to allow for the potential to extend the storage period. Refer to the Specifications, Section 01 35 92.

9. To clarify, NPS does not want the collection to be stored off site in general storage?

a. Would a locked, caged off area in general storage be ok, semi-private?

Response: A locked, caged-off area in general storage is okay, but it must be dedicated to Independence material, i.e. the locked, caged-off area in general storage cannot be shared with other clients. Refer to the Specifications, Section 01 35 92.

b. If not, would a shared private room be ok, or does the client require a private room with no other clients?

Response: No sharing. Refer to the Specifications, Section 01 35 92.

10. What is the loading area like? Is there a dock? Where is it located in the building?

Response: There is no loading dock. The Site Plan shows the contractor’s designated staging area on Library Street to the south of Second Bank. Contractor may use the south steps and/or the west ADA accessible ramp to access this area.

11. Which of the below specifications is being requested, the RFQ lists 2 different climate requests?

a. Temperature range of 65-72 degrees and 45%-60% relative humidity

Response: These parameters are wrong. See revised Specification Section 01 35 92, provided in Attachment 03 to Amendment 0004 and answer 11b., below, for the correct parameters.

b. Temperature must range between 55-70 degrees (+- 5 degrees) and relative humidity range between 40-65% (+- 5%)

Response: Temperature must range between 55-70 degrees (+- 5 degrees) and relative humidity range between 40-65% (+- 5%).

12. The RFQ says no plastic and that newsprint should be used.

a. Does this mean Kraft paper rolls or corrugated rolls?

Response: Kraft paper rolls.

b. Does this mean just the interior packing materials, or does the tape have to be paper based too for sealing boxes?

Response: Just the interior packing materials. See revised Specification Section 01 35 92, Attachment 03 to Amendment 0004.

c. Does the ban on plastics extend to cushioning foam typically used in crates? Is PE foam

(polyethylene) acceptable as cushioning?

Response: The ban on plastics includes the cushioning. No polyethelene foam. See revised Specification Section 01 35 92, Attachment 03 to Amendment 0004.

If polyethylene foam cannot be used, what type of cushioning can be used?

Response: Ethafoam

d. Is plastic in the form of stretch wrap allowed on transit materials like Cbins?

Response: Stretch/shrink wrap is allowed on transit materials. See revised Specification Section 01 35 92, Attachment 03 to Amendment 0004.

13. Will the 214 exhibited works of art be deinstalled already or will the contractor be responsible for deinstallation (removing the pieces from the wall)?

Response: Contractor is responsible for deinstallation.

14. In specification section 1.1, SUMMARY, #3, Pack, transport, store offsite, return, unpack, and reinstall stored reproduction furniture, lighting equipment and supplies, boxed and rolled fabric, equipment crates, boxed wallpaper rolls, boxed carpet tiles, industrial-sized rolls and large boxes of paper and packing material, ladders, and small supplies from second floor rooms prior to start of Construction and then return at the conclusion of Construction. Remove and legally dispose of all related trash from the facility.

a. Are the objects listed above part of the 1435 collections objects, or are these different objects?

Response: This refers to the contents of Rooms 201, 204 and 205-6 only. These are NOT the 1,435 collection items in Rooms 214-215 and 229.

b. If different, is an itemized list available/ inventory of these objects?

Response: See inventories provided in the revised Specification Section 01 35 92, Attachment 03 to Amendment 0004. Please note that the items in Room 201 have been added to this scope of work and are to be treated similarly to the objects in Rooms 204, 205 and 206 (see 2.2.C. of Specification Section 01 35 92).

NOTE: THESE PHOTOS SUPPLEMENT THE INVENTORY LISTS IN SPECIFICATION SECTION

01 35 92. THE ITEMS ON THE INVENTORY LISTS ARE THE ONLY ITEMS THAT WILL NEED

TO BE MOVED, AS SOME OBJECTS IN THESE PHOTOS WILL BE RELOCATED BY NPS

PRIOR TO THE START OF THIS PROJECT.

Photos of Room 201

Photos of Room 204

Photos of Room 205-206

Photos of Room 214-215

Photos of Room 229

c. When it says reinstall, does that mean we are responsible for putting them back into storage or installing the objects?

Response: “Reinstall” means returning all material to their original storage location, i.e. on shelves or on the floor.

15. In specification section 1.2, SUBMITTALS, B. In advance of the move, the Contractor shall submit a proposed procedure and schedule of housekeeping which will occur in the storage space where the Second Bank museum collection, equipment, and supplies are stored to the COR. Housekeeping and inspection of storage spaces shall be performed according to an established and approved schedule.

Is this in reference to the off-site storage or the onsite storage area in the bank?

Response: Off-site storage. Note that the Second Bank building will be operating their HVAC system continuously throughout the duration of this project and that NPS HVAC mechanics will need periodic access throughout the building in order to monitor and service equipment.

16. From specification section 1.2, E, 3 Demonstrated proficiency in transporting heavy museum antiques (e.g., pianos). Is there a piano that needs to be moved?

Response: There are no pianos, but there are large furniture items. See inventories provided in the revised Specification Section 01 35 92, Attachment 03 to Amendment 0004. Correction: See response to 16.a. below, there is a piano that needs to be moved.

a. There is a harpsichord, will the be able to be hand carried down the stairs, can you please provide a photo? Can you please provide size and weight?

Response: There is no harpsichord, but there is a piano: D 28, W 67 1/2, H (W/O LEGS) 14 inches. The word “harpischord” [sic.] has been removed and replaced with the word “piano” on page 3 of the revised Museum Collection Inventory for Second Bank Room 229 (second floor south) in revised Specification Section 01 35 92, provided in Attachment 06 to Amendment 0005.

17. From specification section 2.2, CRATING, PACKING AND MOVING, B. STORED MUSEUM COLLECTION

OBJECTS (ROOMS 214-215, 229):

a. Is there an inventory list for these 1435 objects?

Response: An inventory of those items is provided in Attachment 03 to Amendment 0004.

b. The RFQ mentions heavy museum artifacts, can you please elaborate?

Response: See inventories provided in Attachment 03 to Amendment 0004.

c. Does every object have to be in its own box? Can small framed pieces be wrapped in newsprint and then grouped into commercial bins, separated by dividers? Can the commercial bin be covered in plastic?

Response: No. Small objects must be individually wrapped, but they can be packed together in boxes. Small framed pieces can be wrapped in newsprint and then grouped in commercial bins, separated by dividers. Commercial bins can be covered in plastic.

d. Do all of these objects need packing or are some already in storage containers? If so, which objects and how many?

e. What are the size of the doorways to the stairs from gallery 229? Can you provide photos of the doorways and the stairs?

Response: Door from stairs to storage room 229 measures approximately 40” x 79”. Door at bottom of stairs measures approximately 37” x 80”. Photos of the stairs are included below.

Photos of Stairs on South Side of Building

18. From specification section 2.2, CRATING, PACKING AND MOVING,C. Reproductions, Supply, and Equipment Rooms (Rooms 204, 205-6):

a. Are these objects included in the 1435 objects listed, or are these different objects?

Response: See inventories provided in the revised Specification Section 01 35 92, Attachment 03 to Amendment 0004. Please note that the items in Room 201 have been added to this scope of work and are to be treated similarly to the objects in Rooms 204, 205 and 206 (see 2.2.C. of Specification Section 01 35 92).

b. If they are different, is there an inventory list? With weights and sizes?

c. How many objects will need to be hand carried downstairs due to their location?

Response: Everything in Room 229 must be carried downstairs. Rooms 201, 204, 205-206, and 214-215 have access to an elevator, which may be available to the Contractor.

19. It is mentioned that the contractor shall cover and protect in place all shelving, flat files and cabinets once the collections objects are removed.

a. Does the client have a preference for what the contractor uses to protect these? Is plastic sheeting ok?

Response: Bottom layer kraft paper or cardboard. Top layer plastic sheeting.

b. Is there an inventory list of these storage furniture objects? Type, size, and quantity?

Response:

• There are ten (10) flat files each measuring H 35.5 x L 54 x D 42.5 inches placed back to back in two rows.

• There are twenty-four (24) specimen cabinets each measuring H 37 x L 29 x D 32 inches stacked two high side by side in four groups.

• There are three (3) textile cabinets each measuring H 37 x L 58 x D 32 inches placed on top of two specimen cabinets.

• There are five (5) visible storage cabinets each measuring H 84 x L 36 x D 18 inches placed side by side.

20. As part of the technical proposal we are required to submit PROJECT EXPERIENCE forms of which key subcontractors can also submit up to three (3) relevant project completed in the last seven (7) years. When key subcontractors are submitting relevant projects should they just submit the SUBCONTRACTOR REFERENCE form for each relevant project or should subcontractors also submit PROJECT EXPEREINCE forms that are accompanied by corresponding PAST PERFORMANCE

QUESTIONNAIRES?

Response: The Subcontractor Reference form will not be required in your Proposal Submission Package. Please note the comments in the amendment form for Amendment 0004.

21. We would like to submit questions in regards to SECTION 01 35 92 – COLLECTION MOVE AND STORAGE PROCEDURES. Please see our questions below:

a. For “A. Exhibited Artworks (First Floor Galleries)”:

i. Is there a defined crate specification?

Response: No. Refer to Specification Section 01 35 92 for crate requirements.

ii. What should these crate exterior shells be constructed of MDO, plywood, or other materials?

Response: Plywood or MDO are acceptable. No foam core or MDF.

Are you looking for slotted crates rather than foam core tray-packing?

Response: Yes, slotted.

iii. Should these crates have insulation and shock absorption or just shock absorption?

Response: The crates should meet the performance criteria in Specification Section 01

35 92.

iv. With the lockable requirement - is this a bolt system or a hasp system?

v. Should the crates be waterproofed with paint and rain shelf top?

vi. Are they requesting crates or may we use cardboard slipcases / shadow boxes to protect the artwork for transport & storage?

Response: Crates only.

b. It is stated that there are a total of 25 crates estimated. Is there a packing list per crate or could we schedule a meeting to review which crates should hold designated objects?

Response: Inventory provided in Specification Section 01 35 92 lists each exhibited artwork by size so that Contractor can propose what goes into each crate. The park does not have a required crate content list.

c. Are these crates to be designed to be left onsite only? Or should they be designed to be relocated to offsite storage in the event of an emergency?

Response: The crates should be designed to withstand an emergency move.

d. Wrapping of works: Is there an alternative to a newsprint paper? Is the intention to allow for variability in temp/RH or breathability? Could another alternative such as soft Tyvek or Dartek be proposed?

Response: The intention is to allow for slight variability over time in RH and for breathability/air circulation.

e. Could a site visit be provided the week of July 4th for review of packing methods and design?

Response: Unfortunately, we’re unable to arrange further visits at this time due to staff limitations and fair opportunity to other contractors. The second floor is closed to the public; however, the portrait galleries on the first floor are available.

f. For “B. Stored Museum Collection Objects (Rooms 214-15, 229)”:

i. Is there a list of the 1,435 objects that is available to review?

Response: Yes. See Matrix of Items to Be Moved, provided in Attachment 03 to Amendment 0004.

ii. What will be the registration process for the packing of the 1435 objects? Will these be verified by NPS staff, or should the vendor bring onsite registrars for the process?

Response: NPS staff will perform all registration procedures.

iii. Can the furniture that is wrapped in paper also be wrapped in pads/blankets for transport and storage? Additionally, would soft Tyvek be an alternative?

Response: Pads/blankets are an acceptable alternative. No Tyvek.

iv. Could a site visit be accommodated the week of July 4th for review of packing methods and design? A design designation for the ceramics, metals, glass, textiles, and paintings would be beneficial.

Response: Please see response to Question 21.e.

v. Clarify if cardboard boxes are to be made from archival materials (Blue board or the like)?

Response: Archival cardboard boxes are not required.

vi. It is noted that all objects are to be stored together. Does this require a private room or is managed storage with a designated location acceptable?

Response: See answers to Question 9.

g. For “C. Reproductions, Supply, and Equipment Rooms (Rooms 204, 205-6)”:

i. Are there any special requirements for the packing of the lighting equipment?

Response: No

ii. Could a site visit be provided the week of July 4th for review of packing methods and

iii. Does the estimated 2000 square feet of storage from Bid Option 8 – Contract Line Item No. 0031 Storage Space Rental for Second Floor Contents include the items in section C?

Response: Yes.

h. Overall access questions:

i. Will the awarded vendor have access to truck parking in a close proximity to the main doorway?

Response: Per the answer to Question 10, the Site Plan shows the contractor’s designated staging area on Library Street to the south of Second Bank. Contractor may use the south steps and/or the west ADA accessible ramp to access this area.

ii. Does the elevator capacity/frequency of use have any restrictions?

Response: Per the answer to Question 7, the interior of the elevator cab measures approximately 80” wide by 42” deep. Signage in the cab states that the elevator capacity is 3,000 lbs. Please refer to Specification Section 01 50 00 for additional requirements pertaining to the use of existing elevators.

iii. Could a site visit be provided the week of July 4th for review of packing methods and

22. Is the report for previous repairs (ca. 2005) to the Pennsylvania Blue marble columns available? If so, please provide. Are there any other pertinent reports for previous work available?

Response: See Attachment 04 to Amendment 0004: The Pennsylvania Blue Report Documentation and Conditions Survey of the Exterior Marble Masonry (2004).

23. In preparing our bid a number of questions have come up regarding the windows:

Response: Please note that the existing windows at Second Bank are not original windows and no storm windows are required for this project.

a. 028200-1.2B Asbestos Abatement: For Asbestos abatement- if we coordinate containment with our abatement contractor can the sash be removed offsite for disposal or is it a requirement that the glazing be removed from the sash in situ before removal of the sash?

Response: It is not a requirement that the asbestos-containing materials be removed in situ before removal of the sashes as long as the proper disposal methods and protocols are followed during the removal of the sash per the specifications.

b. 028313-3 1.3A Lead Based Paint: Is the intent to abate Lead based paint by removing trim, sills as well as complete removal of LBP from all surfaces? Can the removal of trim/sills be done by certified RRP personnel or does it need to be removed by a licensed abatement contractor?

Response: See response to Question 3: The hazardous materials approach for the lead paint at all wood elements not being replaced is encapsulation.

c. 085200-1.4D Wood Window design:

i. Type D should be within 5 lbs. of original sash weight. We don’t think this is feasible given that the new sash will be a dense hardwood (Sapele) and have an IGU.

Response: The exact wood species and weight of the existing sashes is unknown. If the criteria as specified cannot be met when the existing sashes are removed and weighed, the NPS may be willing to consider alternative options as proposed by contractor.

ii. Type D should be operable- given that additional counterweights will be required to make the bottom sash operable, it is unlikely there will be enough room in the weight cavity for the top sash to also be operable. Is it acceptable to fix the top sash and counterweight the bottom only?

Response: If operable double-hung windows cannot be achieved at window Type D, NPS will accept a fixed top sash and operable bottom sash as an alternative.

d. 085200-2.6B Wood Window design/installation; Sash chain is specified to be restored-given the additional weight of the new sash we recommend replacing the chain with heavier gauge. Is this acceptable?

Response: If the existing sash chains cannot be restored and reused with the new sashes and the proposed replacement chains work with the existing pulleys, the NPS may be willing to consider this if necessary.

e. Sheet AD8.1 Demolition/Sash removal: Details 1-8 note to remove insulated glazing. If we are removing the sash entirely do need to remove glazing prior to sash removal? If so won’t this make the requirement to weigh each sash superfluous?

Response: The entire existing sash is to be removed – refer to drawings and specifications.

Existing glazing does not need to be removed prior to sash removal.

f. Sheet A8.2 Wood window design:

i. Sash thickness of 1 ½” Can these be 1 ¾” sash- would make for a much stronger build and allow for thicker IGUs

Response: This is not acceptable as it will substantially impact the existing frame to remain.

ii. Detail 11- Steel support at windows 205 and 216? Spec 085200 doesn’t elaborate on this- are there any details on how this should be integrated into the wood window design? Why are there structural requirements at these two windows but not at Window Type D?

Response: See revised sheet G0.0, provided in Attachment 02 to Amendment 0005 and revised sheet A8.2, provided in Attachment 03 to Amendment 0005. On sheet A8.2, details 6 and 11, delete note “At windows 205 and 216 only, internal support: size and material as required to meet performance requirements noted within 08 52 00” and replace with “At windows 105 and 116 only, internal support: size and material as required to meet performance requirements noted within 08 52 00”

The design details of integrating this internal support to window type D at windows 105 and 116 are delegated and to be proposed by the contractor and approved by the NPS during construction. The window must meet the performance specifications noted (including wind loading requirements).

iii. Casement windows-according to these details the entire casement frame, sill and sash is to be removed. This seems to conflict with the directive on the window schedule to restore various components of the Basement window frames. (Note 8.4)

Response: At the basement casement windows, the sills and sashes are to be removed and replaced as identified in the drawings. For the frames, the condition is not fully known, and therefore, it may be possible to salvage portions of the wood frame. For bidding purposes, follow the treatment levels as identified within the window schedule on the drawings for each window frame as noted.

The contractor will be responsible for confirming the quantity of frame to be replaced and will verify this with the NPS during construction.

24. Is it possible to walk the existing roof?

Response: Unfortunately, we’re unable to arrange a roof walk at this time due to staff limitations and fair opportunity to other contractors. Attachment 05 to Amendment 0004 provides vendor information regarding the existing roof. Attachment 04 to Amendment 0005 provides construction drawings and specifications from 1964. The Contractor is responsible for verifying existing conditions.

25. One of our restoration subcontractors has sent in the below concern. While the copper removal methodology sounds right, the iron stain removal from marble is not what we would recommend for a historically significant building. The ferrous stains removers the NPS has listed contain strong acids (phosphoric, sulfuric, oxalic, acetic). The specified methodology does not "remove: the stains.

It "bleaches" them, a process that typically reverses at some point leading to returning of the stains, yellowing and general discoloration. The strong acids on marble can be disastrous even when "neutralized". Can you please advise?

Response: A revised specification section 04 01 40.52 is provided in Attachment 05 to Amendment 0005. Under specification section 04 01 40.52, 2.2, D, delete item 3, “Chemique Masonry Rust Remover, as manufactured by Chemique, Inc.” and delete item 4, “Sure Klean Ferrous Stain

Remover, manufactured by ProSoCo, Inc.” from the list of “Removers for Testing for Removing Iron Stains from Masonry Substrates.”

Testing of the specified rust removal products included in the specifications will be performed during the construction phase to evaluate overall effectiveness as well as any potential damage or discoloration to the marble.

26. As per addendum 4 – Entire copper roof will be replaced with new copper. However, drawing A1.4 roof plan – Note 6.1 & 6.2 – mentions only infill opening with decking and sheathing to match existing. No replacement of roof note existing in roof plan. Please clarify if the entire copper roof will be replaced.

Response: Sheet AD1.4, demolition note 7.1 identifies the removal of the copper roofing. All copper roofing is to be removed as noted. Entire copper roof will be replaced. Please refer to roof plan on drawing A1.4, where areas to receive Roof Type 1 and Roof Type 2 are called out. Roof Type 1 and Roof Type 2 are included as details on drawing A1.0.

27. As per drawing A1.0, 5/8” plywood sheathing to be installed over existing wood deck. Should we consider these 5/8” plywood completely new as part of new copper roof system?

Response: Yes.

28. As per Addendum 4 and drawing A1.0, existing roof decking to be replaced 20% mentioned 2,970 SF.

Should this be a separate cost line item, or will it be part of base bid? Please confirm.

Response: Please use the line items as identified on the Contract Price Schedule for bidding. The roof sheathing replacement is identified as part of the base bid for PMIS 224697 and is listed as CLIN 2.

29.

Standing Seam Roof – Seam Type 1: RFI – As per specification provided dt. 04/09/21 – Seam spacing mentioned as 4’6”. Typical copper sheet size is 3 feet X 10 feet. Typical maximum size of Copper coil for standing seam roofs is 3 feet wide. If we use copper sheet (3’ X 10’) cut in a half, will be 3’ X 5’ – meaning to achieve seam spacing 4’6” there will be a horizontal seam at every 3’ which needs to be soldered continuedly. Due to expansion and contraction, having 4’6” wide span continues solder (Every 3’) will not be recommended.

Request you to please clarify the spacing for standing seam copper roof. Refer below sketch for clarity. 4’6” Seam spacing is achievable using copper sheets but not recommended.

Response: The goal of the roof replacement is to match the existing historic character of the roof in both material and appearance; therefore, the Contractor should attempt to match the 4’-6” seam spacing as noted in the documents. This may require using an atypical copper sheet size.

30. Is there a more detailed inventory list with sizes and weights? Packing a painting that is 24x36 requires different materials and labor than something that is 60x72’. It is hard to estimate when we don’t have any idea of sizing. Even an estimate is fine, for example 75% of the paintings will fit in commercial bins, 25% are about 48x60”

Response: See painting inventory in revised Specification Section 01 35 92, provided in Attachment 06 to Amendment 0005.

a. In galleries 201-215 Do you have weights and sizes for the Bell, cannon, firebacks, stoves, yoke stand for the liberty bell? Photos would be helpful.

Response: Bell H 25 x Diam 20 inches, 75 pounds. Cannon L 26 inches, 40 pounds. Fire backs each H 40 x W 35 x D 3 inches, 50 pounds. Liberty Bell yoke stand (two pieces) each H 48 x W 48 x D 6 inches, 200 pounds.

b. Size for Flag listed as in a large heavy box and extra delicate?

Response: L50 x W 50 X H 3 inches.

c. We are also concerned about some of the larger items that are labeled as heavy being carried down the stairs. Are there weights for the larger items? Sizes? Any inventory with size and weight would be helpful.

i. Harpsichord, wrought iron crane, tombstone, spinning wheel, organs, oven. How are these currently stored? Are they on pallets? Dollies?

Response: There is no harpsichord, but there is a piano – see response to question 16.a. Iron cranes (15 pounds each), tombstone (20 pounds), spinning wheels (7 pounds each), organ (30 pounds), ovens (10 pounds each). All are stored on the floor or on open shelves.

ii. Do clocks need to be disassembled? Are they tabletop or grandfather clocks? Size and weights?

Response: Yes, disassembled so that clock works, pendulums, and weights are packed separately from one another and from the clock cases. All grandfather clocks.

iii. 2D art sizes? Are they all framed?

Response: See painting inventory in revised Specification Section 01 35 92, provided in Attachment 06 to Amendment 0005. Most are unframed.

iv. Frames listed, are they empty frames? What sizes?

Response: Yes, empty frames. Most are H 28 x W 24 inches.

v. How large and heavy is the box of pre packed textile

Response: H 8 x L 60 x D24 inches, 10 pounds.

31. From Part 2, 2.1 General Requirement: The Contractor shall provide additional fine arts insurance of $1,000,000 using a qualified insurance underwriter. Insurance certificates shall be provided to the CO prior to issuance of Notice to Proceed. Is this a request to provide insurance for the collection, in the case of damage or our companies liability insurance for workers on site? Do you have an itemized list of items and their value if it is for the collection?

Response: Insurance for the collection. No itemized list of collection values exists.

32. Per drawing 391/168574, Subsheet A.15, Roof and Gutter Deicing System Details as marked up with vendor questions (see Attachment 07 to Amendment 0005):

a. Detail 2/A6.4: Are all GIT-1 gutter sensors to be placed only at the chimneys? Can you advise how wide the gutters will be?

Response: Refer to sheet E1.2 as noted on sheet A1.5 for details regarding the deicing system.

Per detail 1/E1.2, gutter sensors are to be located at two chimneys only.

The dimensions related to the pole gutter locations are existing and are shown in both the demolition and new work roof plans. Additionally, detail 4/A6.1 provides a section through the pole gutter.

b. Detail 3/A1.5: Are the pole gutters to be covered with heat trace or will these be downspouts where the cable will need to run down into as well? Is the note about "double cable run at pole gutter" possibly in reference to the cable running down inside the pole gutter then back up again to be considered a "double run"? If so, please advise the vertical height of the pole gutters and please provide drawing 4/A6.1 as listed here.

Response: Refer to sheet E1.2 as noted on sheet A1.5 for details regarding the deicing system.

The deicing system will be installed alongside the pole gutter on the side closest to the ridge.

Please see detail 4/E1.2 for clarification regarding the installation detail of the two cables in parallel.

c. Detail 5/A1.5: Do these notes mean that all runs of heat trace cable are to start in the attic and have a vertical distance of approx. 36ft from their start in the attic up to the gutters? If so, are all power connection boxes to be mounted in the attic to start the cable runs up to the roof then out into the gutters? Please provide electrical drawings so I can see more details about what this note means and also to see what power is available for the heat trace system.

Response: Contractor to verify dimensions in field. See electrical drawings for more information.

(End of Amendment 0005 Q&As)

140P2021R0055

File details come from the government source that posted it. Updated .