33330223RF0010010 Amendment 1.pdf

(x)

33330223RF0010010

x x copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR

OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

OCON

Washington DC 20013-7012

MRC 1200

P.O. BOX 37012

OCON

OCON

Washington DC 20013-7012

MRC 1200

P.O. BOX 37012

SMITHSONIAN INSTITUTION

152110803/03/20230001

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

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

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

03/03/2023

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

This is Amendment Number One to Solicitation 333302-23RF-0010010 for the Revitalization of the Hirshhorn Museum Sculpture Garden.

1. Sign in sheet for the Pre-Bid site visit on April 11, 2023 (attached)

2. Response to RFI's 1-7 ( attached)

QUESTIONS/CLARIFICATIONS

It is desired that all questions/clarifications be sent in word format, sequentially

Continued ...

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

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

(Signature of person authorized to sign) (Signature of Contracting Officer)

Christine Grant

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

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

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

2 2

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE OF

(A) (B) (C) (D) (E) (F)

33330223RF0010010/0001

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

numbered for example first questions 1, 2, 3, second set of questions 4, 5, 6, etc. to grantca@si.edu. It is requested that all questions be sent in by Tuesday April 18, 2023, no later than 3PM EST.

Proposals are to be submitted to DropBox.com by Thursday, May 25, 2023 by 3:00PM using the link:

https://www.dropbox.com/request/edueuyXMP53ZTyKqmf

KM and express mailed on or before the due date on separate flash drives labeled Technical and Cost.

RFI # Drawing/Spec Reference Category Question Response by Response

1 section 028200 Asbestos Abatement

Asbestos Abatement has been provided within Volume 1 of the Specifications. A Survey of Hazardous Materials has not been provided. Please advise if asbestos containing material is anticipated to be disturbed by the work in this project.

SI Refer to Specification 010000, 50.9 for scope of PACM testing.

2 section 028300 lead containing material

Work Activities Impacting Lead-containing Materials has been provided within Volume 1 of the Specifications. A Survey of Hazardous Materials has not been provided. Please advise if lead containing material is anticipated to be disturbed by the work in this project.

SI No known lead containing material is anticipated to be disturbed. Refer to Specification 010000, 50.9.

3 drawing G1/S-432 traffic on Jefferson Drive

Per the RFP, through traffic on Jefferson Drive must be maintained. Per note 3 on drawing G1/S-432, Jefferson Drive is to be closed to traffic during underpinning of the existing tunnel. Please advise timeframes where closure of Jefferson Drive will be permitted in order to comply with the Structural note.

A/E

SI: Full closure of Jefferson Drive not permitted

A/E: Phased closure of Jefferson drive to be coordinated by contractor per civil drawings (C801 and C802) and keynote 9 on S101. Note 3 on G1/S-432 to be clarified as “ALL TUNNEL SLAB AND JOISTS TO BE SHORED DURING UNDERPINNING AND JEFFERSON DRIVE SHALL BE PARTIALLY

CLOSED TO TRAFFIC DURING UNDERPINNING. REFERENCE KEYNOTE 9 ON S101.”

4 underpinning specification

An underpinning specification was not included in the project manual. The underpinning shown in the Structural drawings is also serving as the foundation for the new concrete walls outboard of the existing tunnel. Please advise the Structural Engineer’s intended sequence of underpinning/ foundation construction, including: maximum width of underpinning, minimum width of new footing construction, reinforcing splice requirements between underpinning sequences, minimum proximity between underpinning sequences, minimum compressive strength of required prior to excavating for adjacent underpinning sequence.

A/E

A/E: We agree that more information is required to indicate the contractor's work on underpinning, but do not believe a unique underpinning specification is needed. The concrete mix for the underpinning is included in Specification Section 033000 Article 2.7a. Additional underpinning notes will be added to the Structural Design Notes on S001 or S002. The essence of these notes are that, similar to shoring and bracing, because there are numerous means and methods for design and installation, the Underpinning design and procedures are the sole responsibility of the Contractor. See below for language to be incorporated:

A. UNDERPINNING, UNDERPINNING DESIGN, AND PROCEDURES ARE THE SOLE RESPONSIBILITY OF THE CONTRACTOR.

B. PREPARE AND SUBMIT FOR REVIEW UNDERPINNING DRAWINGS STAMPED, SEALED AND PREPARED BY A PROFESSIONAL STRUCTURAL ENGINEER REGISTERED IN PROJECT JURISDICTION SHOWING PLAN'S, DETAILS OF THE UNDERPINNING SCHEME, WORK

PROCEDURE AND PROPOSED TIME SCHEDULE FOR REVIEW.

C. BOTTOM OF EXISTING FOOTING ELEVATIONS SHOWN ARE PROVIDED FROM AVAILABLE INFORMATION AND MUST BE VERIFIED.

D. EXTEND UNDERPINNING TO ELEVATIONS SHOWN.

E. MINIMUM UNDERPINNING CONCRETE STRENGTH, PER STANDARD FOOTING MIX IN THE SPECIFICATIONS OR GREATER AS

DETERMINED BY CONTRACTOR’S ENGINEER.

F. MINIMUM NON-SHRINK GROUT STENGTH, F'C = 5,000 PS OR GREATER AS DETERMINED BY CONTRACTOR’S ENGINEER.

G. DRY PACK BETWEEN UNDERPINNING AND BOTTOM OF EXISTING FOOTING WITH NON-SHRINK GROUT AFTER UNDERPINNING

CONCRETE IS IN PLACE AT LEAST 24 HOURS.

H. SEQUENCE UNDERPINNING TO PROVIDE A MINIMUM 72 HOURS CONCRETE CURE AND 24 HOURS GROUT CURE PRIOR TO

ADJACENT NEW EXCAVATION OR LONGER AS DETERMINED BY CONTRACTOR’S ENGINEER.

I. CONTRACTOR IS RESPONSIBLE FOR ALL MEANS AND METHODS OF INSTALLING UNDERPINNING AND MUST ADEQUATELY

SUPPORT EXISTING STRUCTURES AS IS NECESSARY TO MAINTAIN STABILITY.

J. LOCATE ALL EXISTING ACTIVE SEWER, WATER, GAS, ELECTRIC AND OTHER UTILITY SERVICES AND STRUCTURES AND PROTECT

AT ALL TIMES.

5 specification section 0100000 section 14 work hours

1. Per specification section 0100000, section 14, work hours for the project are Monday-Friday, 6:00 am until 3:00

pm. Per the same section work is not permitted on holidays as listed in section 14.3. Per the RFP, Section F-Deliveries or Performance, “The Contractor…shall work such hours, including night shifts, overtime operations and Sundays and holidays, as may be necessary to insure the progress and completion of the Work in accordance with the approved and currently updated Progress Schedule.” Please clarify the allowable work hours for the project. Specifically, as it relates to make-up for lost days due to weather during the normal work week and early start/ late finish during concrete operations in order to maintain quality and consistency of the work. It is assumed that after hours work permits as required by the District of Columbia and/or any other AHJ would be a requirement and may or may/not be the same as any restrictions imposed by the Smithsonian Institution.

SI All work hours necessary to keep the project on schedule will be permissible.

6 tower crane

Are there any restrictions on the use of a tower crane to complete the work? If a tower crane is used, would Smithsonian Institution require the foundation be removed at the end of use?

SI There are no restrictions within the Smithsonian property footprint. Requirements for removal of the tower crane base will be contingent on how the foundation is placed within the aesthetics of the final landscape.

7 RFP SDB's Does 19.1307 Price evaluation preference for HUBZone small business concerns apply to this opportunity? SI No, this project is not in a HubZone Area. All contractors are deemed equal on this project. All SDBs have opportunity within our participation goals.

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

REQUEST FOR INFORMATION