Amnd0002-specs.pdf

US ARMY ENGINEER DISTRICT, PHILADELPHIA

POC:MICHELLE L. JOHNSON

WANAMAKER BLDG

100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

W25PHS81796931

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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

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

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

THIS AMENDMENT DOES NOT EXTEND THE BID OPENING DATE OF SEPTEMBER 24, 2008 AT 2:00 P.M. LOCAL TIME.

1. CONTRACT ID CODE PAGE OF PAGES

J 1

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

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

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

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912BU-08-B-0021

X 9B. DATED (SEE ITEM 11)

25-Aug-2008

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer 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 Items 8 and 15, and returning 0 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT 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 telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required) Replace Approach Span Bearings and Concrete Pier Repairs, St. Georges Bridge, Inland Waterway, Delaware River to Chesapeake Bay, Delaware and Maryland

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

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

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

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

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

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

16-Sep-2008

CODE

4. REQUISITION/PURCHASE REQ. NO.

CODE

US ARMY ENGINEER DIS RICT, PHILADELPHIAT

CONTRACTING DIVISION

WANAMAKER BUILDING

100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

W912BU E5CTCMLJ7. ADMINISTERED BY (If other than item 6)

CODE FACILITY CODE

EMAIL:TEL:

This page was intentionally left blank for duplex printing.

Amendment No. 0002 Invitation for Bids

W912BU-08-B-0021

14. DESCRIPTION OF AMENDMENT (continued)

a. BID SCHEDULE:

(1) BID SCHEDULE: Please delete page 00010-3 in its entirety and substitute revised page 00010-3, annotated Amendment No. 0002, attached hereto.

b. TECHNICAL SPECIFICATIONS:

(1) Section 02 15 00 – TEMPORARY SUPPORT STRUCTURES: Please delete page 02 15 00-1 in its entirety and substitute revised page 02 15 00-1, annotated Amendment No. 0002, attached hereto.

(2) Section 05 12 10 – BEARING REPLACEMENT: Please delete pages 05 12 10-6 and 7 in their entirety and substitute revised pages 05 12 10-6 and 7, annotated Amendment No. 0002, attached hereto.

c. CONTRACT DRAWINGS:

(1) Please delete drawing 64003 in its entirety and substitute revised drawing of the same numbers, with the latest revision date of 16 September 2008, attached hereto.

d. Please indicate receipt of this amendment on Standard Form 1442 (SOLICITATION, OFFER, AND AWARD) as Amendment No. 0002. Failure to acknowledge all amendments may be cause for rejection of the bid.

00010-3

BIDDING SCHEDULE

Item Estimated Unit Estimated No. Description Quantity Unit Price Amount

BASE BID: Bearing Replacement

1. Traffic Control 1 L.S. $ $

2. State Police Support 48 Hours $ $

3. Bearing Replacement 48 Each $ $

4. Concrete Pier Repairs 560 S.F. $ $

5. Temporary Support Structures 1 L.S. $ $

TOTAL ESTIMATED BASE BID AMOUNT: $

OPTION 1: Concrete Pier Repairs

6. Traffic Control 1 L.S. $ $

7. State Police Support 80 Hours $ $

8. Concrete Pier Repairs 899 S.F. $ $

TOTAL ESTIMATED BASE BID AND OPTION 1: $

NOTE: Bidders must bid on all items. Bids will be evaluated based on the total estimated base bid and Option 1.

SECTION 02 15 00

TEMPORARY SUPPORT STRUCTURES

PART 1 GENERAL

1.1 SCOPE

The work covered by this section consists of furnishing all labor, materials, equipment, tools and performing all operations required for the temporary support of the stringers and Pier 20N cap beam, as specified herein and as shown on the Contract Drawings. Work is to include construction of 7 support structures and related foundations.

1.2 REFERENCES

The publications listed in the following sections form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO Specs (2004) Standard Specifications for Highway Bridges, including all Interim Specifications

1.3 GENERAL REQUIREMENTS

The AASHTO Specs shall govern the work. The Contractor shall verify all dimensions and shall obtain field measurements prior to fabrication and ordering of any material.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

NOTE: Any submittals classified as "SD-01 Preconstruction Submittals" are submittals required to be submitted to, and approved by (if "G" designation) or reviewed by (if for information only), the CO prior to mobilization to the contract work site. All other submittals, classified as "SD-02" through "SD-11," shall be submitted to, and approved by (if "G" designation) or reviewed by (if for information only), the CO prior to commencing the particular task to which the submittal is associated.

SD-08 Statements

Work Plan;G, DO.

A work plan detailing the procedure to be used for the construction, fabrication, use and removal of the temporary support at Pier 20N shall be submitted for approval.

SD-04 Drawings

Section 02 15 00 Page 1

Temporary Support Structures; G, DO.

Design Analysis: The temporary support structures shall be designed and sealed by a Professional Engineer licensed in the State of Delaware, and submitted for approval. The temporary supports shall be designed for the loads shown on the drawings in accordance with AASHTO Specs

Shop Drawings:Shop drawings and associated specificationsshall be submitted for the temporary support structures for approval. Drawings shall include all shop and erection details and material types. If jacks are used, the bracing point locations and jacking equipment details including jacking point locations shall be shown. Members and connections shall be detailed by the fabricator and indicated on the shop drawings.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 GENERAL

The Contractor shall provide complete designs and drawings for all temporary earthwork, temporary footings, and shorings for the indicated design loads.

The Contractor shall comply with all requirements of Section 01 35 29 SAFETY AND OCCUPATIONAL HEALTH REQUIREMENTS, and Section 01 57 20 ENVIRONMENTAL PROTECTION, and references contained therein for the execution of this work.

The Contractor shall obtain approval of all material, equipment, and procedures from the Contracting Officer before any work begins.

The Contractor shall verify dimensions of the existing structure and clearances in the field prior to fabrication and ordering of any material.

If jacks are used, the Contractor shall ensure that the jacks are properly positioned before jacking. A positive means of retaining jacks against slippage due to possible horizontal movements of the superstructure shall be provided.

Welding to the existing steel shall not be permitted.

Any paint damage to existing structural steel shall be repaired in accordance with Section 09900 BRIDGE PAINTING.

The Contractor shall lift the supported elements sufficiently to ensure that Pier 20N columns 1 and 2 do not carry any load during demolition and repair of deteriorated concrete. Loading of Pier 20N columns 1 and 2 will not be allowed until concrete tests show that the required 7 day compressive strength specified in Section03 36 00 CONCRETE REPAIRS has been achieved. All necessaryjacking operations shall be performed in accordance with the requirements specified for jacking under Section 05 12 10 BEARING REPLACEMENT, including Contractor qualifications, government representation during jacking and Section 01 55 00 TRAFFIC CONTROL requirements.

The Contractor shall exercise care in protecting existing concrete and structural steel during the installation of the temporary support

Section 02 15 00 Page 2 and mechanically galvanized. Countersunk bolts shall conform to ASTM A 307 Grade A. Nuts and washers shall conform to ASTM A 563 and ASTM F 436, respectively.

PART 3 EXECUTION

3.1 FABRICATION OF BEARINGS

Bearings shall be fabricated as specified in Section 1113.03 of PennDOT Publication 408. Tolerances shall be as specified in Section 1113.03 (g) of PennDOT Publication 408.

3.1.1 Repairs to Bearings Damaged During Fabrication

Any and all cavities left in the edge of the pad by the manufacturing process shall be repaired by in-plane vulcanizing with neoprene material taken from the same lot as the bearing pad.

3.2 JACKING SYSTEM CONSTRUCTION

The Contractor shall provide and erect a jacking system in accordance with the approved work plan. Stringers may be jacked individually or with a synchronous system designed to jack all northbound or southbound stringers at each pier simultaneously.

The Contractor shall not modify, damage, or attach the jacking system to any existing bridge member to construct or operate the jacks without approval from the Government. Any modification to the bridge shall be detailed in the erection drawings and approved by a Delaware-registered Professional Engineer.

3.3 INSTALLATION OF BEARINGS

a. The Contractor shall use the existing fastener locations to make connections for the new sole plate to the stringer bottom flanges and for the new bearing pad to the top of the concrete pier. The existing fastener locations shall be field verified. The drawings indicate the required bearing pad and sole plate thickness. Field measurements must be taken to determine the shim plate thickness at each location prior to fabrication.

In the field, the Contractor shall verify sizes, dimensions, and types of materials, as required to satisfactorily complete the work.

b. The Contractor shall remove all anchor bolts and rivets from the existing bearings prior to jacking. Rivets and bolts shall be removed by shearing the head using a pneumatic breaker (helldog), and driving out the shank with a pneumatic hammer. Alternately, bolts may be removed by removing the nut and driving out bolt using manual or pneumatic tools. If rivet or bolt shanks cannot be removed by punching without damaging the base material, remove the shank by drilling. Flame-cutting of rivets, bolts or holes is not allowed. If any structural steel to remain in place or concrete pier is damaged by fastener removal operations, the Contractor shall repair or replace the damaged material as directed by the Contracting Officer at no additional cost to the Government.

c. A Government representative must be present during all lifting and lowering of stringers.

d. The existing stringers shall be lifted and temporarily supported a maximum of 1/8" above existing conditions to allow for replacement of the

Section 05 12 10 Page 5 bearings. The Contractor shall lift both stringers in the same stringer line together.. An approved synchronous jacking system for all northbound or southbound stringers at each pier location shall be used. Hydraulic jacks shall be sized for 200% of the calculated lifting load.

During the jacking and seating procedures, the Contractor shall divert traffic as specified in Section 01 55 00 TRAFFIC CONTROL. Normal traffic patterns shall resume once bearings are properly reseated.

e. The existing bearings shall be removed and the new bearings shall be installed. Existing bearings are heavily corroded and bearing surfaces contaminated with debris. New Bearings and all bearing surfaces shall be thoroughly clean and free of all foreign substances prior to installation.

Existing steel which is to be in contact with new steel shall be cleaned and painted in accordance with Section 00 90 00 PAINTING .

At the time of installation, the bearings shall be set to the dimensions prescribed by the manufacturer and as shown on the contract drawings.

f. Set the bridge bearings, in exact position in the following manner:

Place a grout leveling course approximately 1/4" thick. Temporarily place the vulcanized elastomeric bearing pads in place. Place sole plates and single wedge shim plate in place to determine if further milling of the single wedge shim plate is necessary to achieve a parallel uniform surface, within in a tolerance of 1/8", between the sole plate and the concrete grout. Utilize stainless steel shims as necessary to ensure that the gap between the bearing pad and sole plate is uniform to a tolerance of 1/32”.

Remove the bearing pad and install the sole plate and fabricated shims to the bottom flange of the stringers with countersunk bolts. Install the bearing pad with expansion anchor bolts. The Contractor shall utilize a precision gap measuring device capable of measuring a distance of 2 to 3-inches, with and accuracy of 0.001 inch.

g. Holes in existing steel shall be field drilled. Flame cutting is not permitted. Holes shall be precisely located by use of a template or other approved method. Drilled hole dimensions shall conform to Table 1, AISC S329. Holes in steel shall be free of nicks, burrs, corrosion, scale, paint and foreign substances both inside the hole and on the surfaces around the hole. Holes shall be prepared as necessary with a power tool grinding wheel according to SSPC SP 3 to ensure proper seating of the nut, the bolt head, and the washers. New high-strength bolts shall be installed as indicated on the contract drawings. Bolt length shall be sufficient to project a minimum of 3/8 inch beyond the nut. If the new bolt cannot be placed in the hole originally occupied by the rivet or bolt, ream the hole to proper size. If reaming produces an oblong hole in any material, the largest diameter of which is more than 1/8 inch larger than the diameter of the proposed bolt, increase the diameter of the new bolt by one size and ream the hole to fit the larger bolt. High-strength bolts installed by the Contractor not meeting the requirements detailed on the contract drawings will be removed by the Contractor and replaced at no additional cost to the Government. Existing holes which will not receive new bolts, shall be prepared and painted as specified in Section 09 90 00, PAINTING. Anchor bolts into the concrete pier shall be installed as follows: Bolts shall be installed into the pier as per the contract drawings. An intermediate nut and washer shall be installed on top of the grout. The intermediate nut shall be tightened as described in the contract drawings. Top nuts shall installed as shown on the contract drawings.

Section 05 12 10 Page 6

h. Any damage to the structure, stringers or new bearings occurring during jacking, bearing installation procedures or resetting of the structure shall be repaired by the Contractor at no expense to the Government.

3.4 QUALITY CONTROL TESTING

3.4.1 Sampling

The completed bearing pads shall be sampled at a rate of one pad for every 12 pads or fraction of pads received.

3.4.2 Testing

Subject the materials for the neoprene bearings and the finished bearings themselves to the tests described in Table A of Section 1113.03(f) of PennDOT Publication 408. Any material or completed bearing failing to meet any of the testing criteria specified herein shall be rejected.

3.5 PAINTING

Surface preparation and painting of all steel portions of new bearings and areas of bridge elements affected by Contractor operations shall be performed as specified in Section 09 90 00 PAINTING. All new steel members shall be primed in the shop. Finish coat of paint shall be applied after installation. Painting of the neoprene pads is prohibited.

3.6 MEASUREMENT AND PAYMENT

The work specified in this section will be measured for payment by the number of bearings satisfactorily installed and accepted. Payment will be made at the contract price per unit for Base Bid Item No. 3, "Bearing Replacement", which shall constitute full compensation to the Contractor for access, all required jacking operations, all required shoring/support, removal of existing stringer bearings, installation of new bearings, removal and installation of all associated fasteners, and any incidental cleaning and painting of new steel and affected areas. No separate payment shall be made for containment and disposal of spent blast medium or other contaminated materials and all costs in connection therewith shall be included in the the cost of all the bid items for which it is applicable.

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Section 05 12 10 Page 7