AUGUST 27, 2020

REHABILITATION OF BRIDGE NO. 3400D I-84 TR 823 OVER PARKING LOT

FEDERAL AID PROJECT NO. N/A

STATE PROJECT NO. 0063-0694

CITY OF HARTFORD

ADDENDUM NO. 2

This Addendum addresses the following questions and answers contained on the “CT DOT

QUESTIONS AND ANSWERS WEBSITE FOR ADVERTISED CONSTRUCTION

PROJECTS”:

Question and Answer Nos. 2, and 5.

SPECIAL PROVISIONS

NEW SPECIAL PROVISION

The following Special Provision is hereby added to the Contract:

• ITEM NO. 0603591A – STRUCTURAL STEEL - MISCELLANEOUS

REVISED SPECIAL PROVISION

The following Special Provision is hereby deleted in its entirety and replaced with the attached

like-named Special Provision:

• ITEM NO. 0603081A – STRUCTURAL STEEL REPAIRS (SITE NO. 1)

CONTRACT ITEMS

NEW CONTRACT ITEM

ITEM NO.

0603591A

DESCRIPTION

STRUCTURAL STEEL -

MISCELLANEOUS

UNIT

CWT

QUANTITY

51

REVISED CONTRACT ITEMS

ITEM NO.

0603081A

1806202

DESCRIPTION

STRUCTURAL STEEL REPAIRS

(SITE NO. 1)

TRUCK-MOUNTED OR TRAILER-

MOUNTED IMPACT ATTENUATOR

ORIGINAL

QUANTITY

54 CWT

100 HR

REVISED

QUANTITY

4 CWT

700 HR

PLANS

REVISED PLANS

The following Plan Sheets are hereby deleted and replaced with the like-numbered Plan Sheets:

• 02.01.A2

• 05.05.A2

• 06.06.A2, 06.08.A2

The Bid Proposal Form has been revised to reflect these changes.

The Detailed Estimate Sheet does not reflect these changes.

There will be no change in the number of calendar days due to this Addendum.

The foregoing is hereby made a part of the contract.

Rev. Date 8/24/2020

ITEM #0603081A

ADDENDUM NO. 2

ITEM #0603081A– STRUCTURAL STEEL REPAIRS (SITE NO. 1)

Description: Work under this item shall consist of furnishing, fabricating, transporting, storing, handling and installing structural steel plates and steel angles for the purpose of; repairing deteriorated beam webs, flanges, web stiffeners of the type and size designated, replacing end cross frames, as shown on the plans, as directed by the Engineer and in accordance with these specifications. All work shall conform to the requirements of the AASHTO LRFD Bridge Design Specifications, 2014 7th Edition and the ANSI/AASHTO/AWS Dl.5- Bridge Welding Code. Materials: The materials for this work shall conform to the requirements of AASHTO M270, Grade 50 T2. High strength bolts shall conform to ASTM F3125 Grade A325. Nuts shall conform to ASTM A563, Grade C. Washers shall conform to ASTM A436. Materials for this work shall be stored off the ground before, during, and after fabrication. The plates shall be kept free from dirt, grease and other contaminants and shall be reasonably protected from corrosion. All new structural steel shall be prime coated, before delivery to the site, and shall have a Class “B” slip critical faying surface unless indicated elsewhere on the contract plans. The paint primer shall be prepared in accordance with “Abrasive Blast Cleaning and Field Painting of Beam Ends” The caulking shall be silicone sealant conforming to ASTM C-920 Type S, Grade NS, Class 40 or Federal Specifications TT-S-001543A (COM-NBS) Class A and TT-S-00230C (COM-NBS) Class A. The sealant shall be compatible with the proposed painting system.

Construction Methods: I. Pre-qualification: (a) Fabricators producing material for Department projects under this item are required to have, as a minimum, an active AISC Certification for Simple Steel Bridges. (b) Field Welders: All field welders, field welding operators, and field tackers shall possess a valid welder certification card issued by the Department's Division of Materials Testing. If such

person has not been engaged in welding operations on a Department project or project acceptable to the Department within a period of six months, or if he cannot produce an approved welding certificate dated within the previous twelve months from a welding agency acceptable to the Engineer, he shall be required to re-qualify through examination. The Engineer may require re­ qualification of anyone whose quality of work he questions.

0063-0694 3

Rev. Date 8/24/2020

ITEM #0603081A

ADDENDUM NO. 2

2. Submittals: (a) Shop Drawings: Shop drawings will not be required for repair plates. The thickness of the new plates, required chamfers, and weld sizes shall all be in accordance with the plans. The steel repair tables on the span drawings are preliminary and subject to change after cleaning operations. The height and width dimensions of the new plates will be determined by the Engineer and conveyed to the Contractor after the cleaning operations have been completed at a given location. Shop Drawings will be required for repair angles.

(b) Welding Procedures: Prior to start of fabrication, all weld procedures shall be submitted to

the Engineer for review and approval. The Contractor shall submit these documents to the Engineer at least 30 calendar days in

advance of their proposed use. If the proposed method of installation requires additional

members or modifications to the existing members of the structure, such additions and

modifications shall be made by the Contractor at no expense to the State.

3. Shop Fabrication: Unless otherwise shown on the plans or indicated in the Special Provisions, structural steel shall be fabricated in accordance with the AASHTO Standard

Specifications for Highway Bridges 17th Edition, amended as follows: (a) Notification: The Contractor shall submit written notification to both the Engineer and the

Division Chief of Material Testing not less than 7 calendar days prior to start of fabrication. No

material shall be manufactured or worked in the shop before the Engineer has been so notified.

The notification shall include the name and location of the fabrication shop where the work will

be done so that arrangements can be made for an audit of the facility and the assignment of a

Department Quality Assurance inspector.

(b) Welding: Unless otherwise indicated on the plans or specifications, all work shall be

performed in accordance with ANSI/AASHTO/AWS D1.5 -Bridge Welding Code. (c) Inspection: The Contractor shall furnish facilities for the inspection of material and workmanship in the shop by the Engineer. The Engineer and his representative shall be allowed free access to the necessary parts of the premises.

The Engineer will provide Quality Assurance (QA) inspection at the fabrication shop to assure

that all applicable Quality Control plans and inspections are adequately adhered to and

maintained by the Contractor during all phases of the fabrication. A thorough inspection of a

random selection of elements at the fabrication shop may serve as the basis of this assurance. Prior to shipment to the project, each individual piece of structural steel shall be stamped or

marked in a clear and permanent fashion by a representative of the fabricators' Quality Control

(QC) Department to indicate complete final inspection by the fabricator and conformance to the

project specifications for that piece. The stamp or mark must be dated. A Materials Certificate

in accordance with Article 1.06.07 may be used in lieu of individual stamps or markings, for

0063-0694 4

Rev. Date 8/24/2020

ITEM #0603081A

ADDENDUM NO. 2

all material in a single shipment. The Materials Certificate must list each piece within the

shipment and accompany the shipment to the project site. Following the final inspection by the fabricator's QC personnel, the Engineer may select pieces

of structural steel for re-inspection by the Department’s QA inspector. Should non-conforming

pieces be identified, all similar pieces must be re-inspected by the fabricator and repair

procedure(s) submitted to the Engineer for approval. Repairs will be made at the Contractor's

expense.

The pieces selected for re-inspection and found to be in conformance, or adequately repaired

pieces, may be stamped or marked by the QA inspector. Such markings indicate the

Engineer takes no exception to the pieces being sent to the project site. Such marking does

not indicate acceptance or approval of the material by the Engineer.

Following delivery to the project site, the Engineer will perform a visual inspection of all

material to verify shipping documents, fabricator markings, and that there was no damage to

the material or coatings during transportation and handling. The Engineer is not responsible

for approving or accepting any fabricated materials prior to final erection and assembly at the

project site.

(d) Nondestructive Testing: All nondestructive testing of structural steel and welding shall

be performed as designated on the plans and in the project specifications. Such testing shall

be performed by personnel approved by the Engineer.

Personnel performing Radiographic, Ultrasonic or Magnetic Particle testing shall be certified

as a NDT Level II technician in accordance with the American Society for Non Destructive

Testing (ASNT), Recommended Practice SNT-TC-IA.

Nondestructive testing shall be performed in accordance with the procedures and standards

set forth in the AASHTO/AWS Dl.5, Bridge Welding Code. The Department reserves the

right to perform additional testing as determined by the Engineer.

All nondestructive testing shall be witnessed by an authorized representative of the

Department. Certified reports of all tests shall be submitted to the Division Chief of Material

Testing for examination. Each certified report shall identify the structure, member, and

location of weld or welds tested. Each report shall also list the length and location of any

defective welds and include information on the corrective action taken and results of all

retests of repaired welds.

Should the Engineer require nondestructive testing on welds not designated in the contract,

the cost of such inspection shall be borne by the Contractor if the testing indicates that any

weld(s) are defective. If the testing indicates the weld(s) to be satisfactory, the actual cost of

such inspection will be paid by the Department.

0063-0694 5

Rev. Date 8/24/2020

ITEM #0603081A

ADDENDUM NO. 2

(e) Marking: Each plate or angle shall be identified with an erection mark corresponding with

the location where the plate will be installed. Identification marks shall be impressed into the

member with a low stress stamp in a location in accordance with standard industry practice.

(f) Shipping, Handling and Storage: The Contractor shall make all arrangements necessary to

properly load, transport, unload, handle and store all material. The Contractor shall furnish to

the Engineer copies of all shipping statements. The weight of the individual members shall be

shown on the statements. All material shall be unloaded promptly upon delivery. The Contractor

shall be responsible for any demurrage charges. Damage to any material during transportation,

improper storage, faulty erection, or undocumented fabrication errors may be cause for rejection

of said material at the project site. All costs associated with any corrective action will be borne

by the Contractor.

4. Removal of Deteriorated Steel: Wherever arc gouging or welding will be used, existing lead

paint must first be removed. For locations outside of the limits of beam end painting, the existing

paint shall be removed and the new paint shall be applied in accordance with the item “Localized

Paint Removal and Field Painting of Existing Steel”. For locations within the limits of beam end

painting, the existing paint shall be removed and the new paint shall be applied in accordance

with the item “Abrasive Blast Cleaning and Field Painting of Beam Ends (Site No. 1)”.

Existing deteriorated steel shall be cut out and removed in locations identified in the plans

and as ordered by the Engineer. Existing welds shall be removed by machining, grinding,

chipping, or air carbon-arc gouging and in such a manner that the remaining base metal is

not wicked or undercut. A minimum of 1/8" of weld metal shall be left in place if arc gouging

is the selected removal method and the remaining weld metal shall be removed by grinding.

Welders who perform arc gouging shall be SMAW certified.

5. Installation of Plates: Plates shall be installed as shown on the plans and any match marks shall be followed. The plates shall be carefully handled so they will not be bent or otherwise damaged.

Hammering which will injure or distort new or existing members is not permitted. All surfaces

to remain in permanent contact shall be cleaned before the final welding. The Contractor shall provide the Engineer reasonable access to the deteriorated steel locations

for the purpose of inspection whenever so requested.

Welding: Unless otherwise shown on the plans or indicated by the special provisions, welding of

structural steel shall be done in accordance with "ANSI/AASHTO/AWS D1.5 Bridge Welding

Code."

The Contractor's welding and inspection procedures for each type of field weld and field tacking must be submitted to the Engineer on the form designated by the Department. All procedures

0063-0694 6

Rev. Date 8/24/2020

ITEM #0603081A

ADDENDUM NO. 2

must be approved by the Division Chief of Material Testing prior to any work and must be

adhered to at all times.

Quality control is the responsibility of the Contractor. The Contractor must provide an AWS

Certified Welding Inspector (CWI) in accordance with AWS D1.5. The CWI must be qualified

and certified in accordance with the provisions of AWS QCI, Standard for Qualification and

Certification of Welding Inspectors. The CWI shall make a visual inspection of all welds. The Contractor will perform magnetic particle inspection of all welds. Each test may be witnessed by an authorized representative

of the Engineer.

Welds or sections of welds containing imperfections determined to be unacceptable by either the

CWI or the Engineer shall be removed and re-welded by the Contractor at his expense. Welds

so removed and replaced shall be re-inspected by the CWI. All costs for re-inspection or

testing of such welds shall be borne by the Contractor. Surface Conditions: At the time of assembly, all faying surfaces shall be free of scale, except

tight mill scale, and shall be free of dirt or other foreign material. Burrs or other irregularities

that prevent solid seating of the adjoining surfaces shall be removed. Method of Measurement: This work will be measured for payment at the contract unit price

per hundred weight of new steel complete and accepted in place. The weight of the structural steel plate to be measured for payment under this item shall be

computed on the basis of the net finished dimensions of the plates based on measurements

taken by the Engineer, deducting for copes and cuts. Angles, permanent bolts, nuts, washers

and other new structural steel members will be measured by the actual weight of steel

installed and accepted. The weight of weld metal and temporary erection bolts, boxes, crates,

and other containers used for shipping, and materials used for supporting members during

transportation and erection shall not be measured for payment.

Basis of Payment: The structural steel, incorporated in the completed and accepted structure,

will be paid for at the contract unit price per hundredweight for "Structural Steel Repairs (Site

No. 1)." Payment shall be for structural steel, complete in place, which price shall include

fabricating, furnishing, transporting, storing, erecting and installing the plates, angles, and

associated bolts, nuts, and washers, all welding and weld inspection, and all other materials,

equipment, tools, labor and work incidental thereto.

The cleaning and application of paint of all areas of steel repairs outside of limits of beam end

painting shall be paid for under the item “Localized Paint Removal and Field Painting of Existing

Steel”. The cleaning and application of paint of all areas of steel repairs within limits of beam end

painting shall be paid for under the item “Abrasive Blast Cleaning and Field Painting of Beam

0063-0694 7

Rev. Date 8/24/2020

ITEM #0603081A

ADDENDUM NO. 2

Ends (Site No. 1)”. Shop priming of all steel shall be paid for under “Structural Steel Repairs (Site

No. 1).”

Pay Item Pay Unit

Structural Steel Repairs (Site No. 1) CWT

0063-0694 8

Rev. Date 8/24/2020

ITEM #0603591A

ADDENDUM NO. 2

ITEM #0603591A– STRUCTURAL STEEL - MISCELLANEOUS

Description: Work under this item shall consist of furnishing, fabricating, transporting, storing, handling and installing structural steel plates for the purpose of; bearing filler plates, replacing beveled sole plates for bearings, anchor bolt cover plates, and drainage support brackets as shown on the plans, as directed by the Engineer and in accordance with these specifications. Where specified on the plans, the furnishing, fabricating, transporting, storing, handling and installing of the steel brackets used for drainage pipe supports along the bridge substructure shall also be included under this item. Bolts, nuts and flat washers required in the bearing assemblies as shown on the plans are to be paid for under “Bearing Replacement with Elastomeric Bearing Pads”. Straps, nuts and flat washers required for drainage support brackets are paid for under this item. Bolts for the drainage support brackets are paid for under “Drilling and Grouting Reinforcing Bars”. All work shall conform to the requirements of the AASHTO LRFD Bridge Design Specifications, 2014 7th Edition and the ANSI/AASHTO/AWS Dl.5- Bridge Welding Code. Materials: The materials for this work shall conform to the requirements of AASHTO M270, Grade 50 T2. Bolts shall conform to ASTM F3125 Grade A325. Nuts shall conform to ASTM A563, Grade C. Washers shall conform to ASTM A436. Materials for this work shall be stored off the ground before, during, and after fabrication. The plates shall be kept free from dirt, grease and other contaminants and shall be reasonably protected from corrosion. All new structural steel shall be prime coated, before delivery to the site, and shall have a Class “B” slip critical faying surface unless indicated elsewhere on the contract plans. The paint primer shall be prepared in accordance with “Abrasive Blast Cleaning and Field Painting of Beam Ends”

Construction Methods: I. Pre-qualification: (a) Fabricators producing material for Department projects under this item are required to have, as a minimum, an active AISC Certification for Simple Steel Bridges. (b) Field Welders: All field welders, field welding operators, and field tackers shall possess a

valid welder certification card issued by the Department's Division of Materials Testing. If such person has not been engaged in welding operations on a Department project or project acceptable

to the Department within a period of six months, or if he cannot produce an approved welding certificate dated within the previous twelve months from a welding agency acceptable to the

0063-0694 9

Rev. Date 8/24/2020

ITEM #0603591A

ADDENDUM NO. 2

Engineer, he shall be required to re-qualify through examination. The Engineer may require re­

qualification of anyone whose quality of work he questions.

2. Submittals: (a) Shop Drawings will be required for beveled sole plates.

(b) Welding Procedures: Prior to start of fabrication, all weld procedures shall be submitted to

the Engineer for review and approval. The Contractor shall submit these documents to the Engineer at least 30 calendar days in

advance of their proposed use. If the proposed method of installation requires additional

members or modifications to the existing members of the structure, such additions and

modifications shall be made by the Contractor at no expense to the State. 3. Shop Fabrication: Unless otherwise shown on the plans or indicated in the Special Provisions, structural steel shall be fabricated in accordance with the AASHTO Standard Specifications for Highway Bridges 17th Edition, amended as follows: (a) Notification: The Contractor shall submit written notification to both the Engineer and the

Division Chief of Material Testing not less than 7 calendar days prior to start of fabrication. No

material shall be manufactured or worked in the shop before the Engineer has been so notified.

The notification shall include the name and location of the fabrication shop where the work will

be done so that arrangements can be made for an audit of the facility and the assignment of a

Department Quality Assurance inspector.

(b) Welding: Unless otherwise indicated on the plans or specifications, all work shall be

performed in accordance with ANSI/AASHTO/AWS D1.5 -Bridge Welding Code. (c) Inspection: The Contractor shall furnish facilities for the inspection of material and workmanship in the shop by the Engineer. The Engineer and his representative shall be allowed free access to the necessary parts of the premises.

The Engineer will provide Quality Assurance (QA) inspection at the fabrication shop to assure

that all applicable Quality Control plans and inspections are adequately adhered to and

maintained by the Contractor during all phases of the fabrication. A thorough inspection of a

random selection of elements at the fabrication shop may serve as the basis of this assurance. Prior to shipment to the project, each individual piece of structural steel shall be stamped or

marked in a clear and permanent fashion by a representative of the fabricators' Quality Control

(QC) Department to indicate complete final inspection by the fabricator and conformance to the

project specifications for that piece. The stamp or mark must be dated. A Materials Certificate

in accordance with Article 1.06.07 may be used in lieu of individual stamps or markings, for

all material in a single shipment. The Materials Certificate must list each piece within the

shipment and accompany the shipment to the project site.

0063-0694 10

Rev. Date 8/24/2020

ITEM #0603591A

ADDENDUM NO. 2

Following the final inspection by the fabricator's QC personnel, the Engineer may select pieces

of structural steel for re-inspection by the Department’s QA inspector. Should non-conforming

pieces be identified, all similar pieces must be re-inspected by the fabricator and repair

procedure(s) submitted to the Engineer for approval. Repairs will be made at the Contractor's

expense.

The pieces selected for re-inspection and found to be in conformance, or adequately repaired

pieces, may be stamped or marked by the QA inspector. Such markings indicate the

Engineer takes no exception to the pieces being sent to the project site. Such marking does

not indicate acceptance or approval of the material by the Engineer.

Following delivery to the project site, the Engineer will perform a visual inspection of all

material to verify shipping documents, fabricator markings, and that there was no damage to

the material or coatings during transportation and handling. The Engineer is not responsible

for approving or accepting any fabricated materials prior to final erection and assembly at the

project site.

(d) Nondestructive Testing: All nondestructive testing of structural steel and welding shall

be performed as designated on the plans and in the project specifications. Such testing shall

be performed by personnel approved by the Engineer.

Personnel performing Radiographic, Ultrasonic or Magnetic Particle testing shall be certified

as a NDT Level II technician in accordance with the American Society for Non Destructive

Testing (ASNT), Recommended Practice SNT-TC-IA.

Nondestructive testing shall be performed in accordance with the procedures and standards

set forth in the AASHTO/AWS Dl.5, Bridge Welding Code. The Department reserves the

right to perform additional testing as determined by the Engineer.

All nondestructive testing shall be witnessed by an authorized representative of the

Department. Certified reports of all tests shall be submitted to the Division Chief of Material

Testing for examination. Each certified report shall identify the structure, member, and

location of weld or welds tested. Each report shall also list the length and location of any

defective welds and include information on the corrective action taken and results of all

retests of repaired welds.

Should the Engineer require nondestructive testing on welds not designated in the contract,

the cost of such inspection shall be borne by the Contractor if the testing indicates that any

weld(s) are defective. If the testing indicates the weld(s) to be satisfactory, the actual cost of

such inspection will be paid by the Department.

(e) Marking: Each steel member shall be identified with an erection mark corresponding with

the location where the member will be installed. Identification marks shall be impressed into

0063-0694 11

Rev. Date 8/24/2020

ITEM #0603591A

ADDENDUM NO. 2

the member with a low stress stamp in a location in accordance with standard industry

practice.

(f) Shipping, Handling and Storage: The Contractor shall make all arrangements necessary to

properly load, transport, unload, handle and store all material. The Contractor shall furnish to

the Engineer copies of all shipping statements. The weight of the individual members shall be

shown on the statements. All material shall be unloaded promptly upon delivery. The Contractor

shall be responsible for any demurrage charges. Damage to any material during transportation,

improper storage, faulty erection, or undocumented fabrication errors may be cause for rejection

of said material at the project site. All costs associated with any corrective action will be borne

by the Contractor.

4. Installation of Plates: Plates shall be installed as shown on the plans and any match marks shall be followed. The plates shall be carefully handled so they will not be bent or otherwise damaged.

Hammering which will injure or distort new or existing members is not permitted. All surfaces

to remain in permanent contact shall be cleaned before the final welding. Welding: Unless otherwise shown on the plans or indicated by the special provisions, welding of

structural steel shall be done in accordance with "ANSI/AASHTO/AWS D1.5 Bridge Welding

Code." The Contractor's welding and inspection procedures for each type of field weld and field tacking must be submitted to the Engineer on the form designated by the Department. All procedures must be approved by the Division Chief of Material Testing prior to any work and must be adhered to at all times.

Quality control is the responsibility of the Contractor. The Contractor must provide an AWS

Certified Welding Inspector (CWI) in accordance with AWS D1.5. The CWI must be qualified

and certified in accordance with the provisions of AWS QCI, Standard for Qualification and

Certification of Welding Inspectors. The CWI shall make a visual inspection of all welds. The Contractor will perform magnetic particle inspection of all welds. Each test may be witnessed by an authorized representative

of the Engineer.

Welds or sections of welds containing imperfections determined to be unacceptable by either the

CWI or the Engineer shall be removed and re-welded by the Contractor at his expense. Welds

so removed and replaced shall be re-inspected by the CWI. All costs for re-inspection or

testing of such welds shall be borne by the Contractor.

0063-0694 12

Rev. Date 8/24/2020

ITEM #0603591A

ADDENDUM NO. 2

Surface Conditions: At the time of assembly, all faying surfaces shall be free of scale, except

tight mill scale, and shall be free of dirt or other foreign material. Burrs or other irregularities

that prevent solid seating of the adjoining surfaces shall be removed. Method of Measurement: This work will be measured for payment at the contract unit price

per hundred weight of new steel complete and accepted in place. The weight of the structural steel plate and brackets to be measured for payment under this

item shall be computed on the basis of the net finished dimensions of the plates based on

measurements taken by the Engineer, deducting for copes and cuts. Permanent bolts, nuts,

washers and other new structural steel members will be measured by the actual weight of

steel installed and accepted. The weight of weld metal and temporary erection bolts, boxes,

crates, and other containers used for shipping, and materials used for supporting members

during transportation and erection shall not be measured for payment.

Basis of Payment: The structural steel, incorporated in the completed and accepted structure,

will be paid for at the contract unit price per hundredweight for "Structural Steel -

Miscellaneous". Payment shall be for structural steel, complete in place, which price shall

include fabricating, furnishing, transporting, storing, erecting and installing the plates,

brackets, and associated bolts, nuts, and washers, all welding and weld inspection, and all

other materials, equipment, tools, labor and work incidental thereto.

The cleaning and application of paint of all areas of steel repairs outside of limits of beam end

painting shall be paid for under the item “Localized Paint Removal and Field Painting of Existing

Steel”. The cleaning and application of paint of all areas of steel repairs within limits of beam end

painting shall be paid for under the item “Abrasive Blast Cleaning and Field Painting of Beam

Ends (Site No. 1)”. Shop priming of all steel shall be paid for under “Structural Steel -

Miscellaneous.”

Pay Item Pay Unit

Structural Steel - Miscellaneous CWT

0063-0694 13