SITE ACCESS / TRAFFIC CONTROL CONSTRUCTION NOTES

Transcription

1 GENERAL NOTES GENERAL NOTES (CONT'D). ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO THE "STANDARD SPECIFICATION FOR ROAD AND BRIDGE CONSTRUCTION" ADOPTED APRIL, 206 BY THE ILLINOIS, INCLUDING SUPPLEMENTAL SPECIFICATIONS AND RECURRING SPECIAL PROVISIONS UNLESS OTHERWISE SPECIFIED. THE CONTRACTOR SHALL COORDINATE CONSTRUCTION ACTIVITIES WITH THE CITY OF CHICAGO, CHICAGO TRANSIT AUTHORITY (CTA) AND UTILITY COMPANIES. THESE CONTRACT DOCUMENTS HAVE BEEN PREPARED BASED ON FIELD INSPECTION, EXISTING PLANS AND OTHER INFORMATION AVAILABLE AT THE TIME OF CONTRACT LETTING. ACTUAL FIELD CONDITIONS MAY REQUIRE MODIFICATIONS TO CONSTRUCTION DETAILS AND WORK QUANTITIES. IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO VERIFY THE PLAN DIMENSIONS AND DETAILS IN THE FIELD AND MAKE NECESSARY ( BY THE CITY) ADJUSTMENTS PRIOR TO CONSTRUCTION OR ORDERING MATERIALS. SUCH VARIATION SHALL NOT BE THE CAUSE FOR ADDITIONAL COMPENSATION OR A CHANGE IN THE SCOPE OF WORK. HOWEVER, THE CONTRACTOR WILL BE PAID FOR THE QUANTITY ACTUALLY FURNISHED AT THE UNIT PRICE FOR THE WORK. THE DESIGN, CONSTRUCTION ERECTION AND DETAIL DRAWINGS OF THE EXISTING STRUCTURE AS REFERENCED ON THE PLAN SHEETS ARE TO BE CONSIDERED PART OF THE CONTRACT DOCUMENTS, INCLUDING NOTATIONS PLACED ON THOSE DRAWINGS PERTAINING TO THE WORK. THE CONTRACT, DESIGN DRAWINGS OF THE EXISTING STRUCTURE AND SELECTED SHOP DRAWINGS ARE AVAILABLE TO THE CONTRACTOR AT THE DIVISION OF ENGINEERING,,, 30 NORTH LASALLE STREET, SUITE 400, CHICAGO, ILLINOIS 6060 ALL ELEVATIONS REFER TO THE CHICAGO CITY DATUM, WHICH IS FEET ABOVE MEAN SEA LEVEL, 935 ADJUSTMENT. THE CONTRACTOR SHALL EXERCISE CAUTION DURING ALL REPAIR OPERATIONS TO PREVENT ANY DAMAGE TO ADJACENT BUILDINGS, STRUCTURES, UTILITIES, TRAINS, VEHICULAR TRAFFIC AND STRUCTURAL COMPONENTS NOT WITHIN THE SCOPE OF THESE OUTLINED REPAIRS. BUILDING MEMBERS, STRUCTURES, UTILITIES AND STRUCTURAL COMPONENTS NOT WITHIN THE SCOPE OF THESE REPAIRS AND IMPROVEMENTS THAT ARE DAMAGED DURING THE REPAIR OPERATIONS SHALL BE REPAIRED OR REPLACED AT THE EXPENSE OF THE CONTRACTOR TO THE SATISFACTION OF THE COMMISSIONER. THE CONTRACTOR SHALL IMPLEMENT PROTECTIVE MEASURES SO AS TO PREVENT ANY DEBRIS FROM FALLING INTO THE. IF ANY DEBRIS FALLS INTO THE WATERWAY, THE CONTRACTOR SHALL REMOVE IT FROM THE RIVER AT HIS/HER OWN EXPENSE AND TO THE SATISFACTION OF THE COMMISSIONER. 7. THE CONTRACTOR SHALL COORDINATE WITH THE U.S. COAST GUARD AT LEAST 30 DAYS PRIOR TO THE START OF ANY WORK THAT TEMPORARILY ALTERS THE NAVIGATIONAL CLEARANCES OR PLACES EQUIPMENT IN OR OVER THE WATERWAY THAT MIGHT IMPEDE NAVIGATION. CONTACT MR. SCOT STRIFFLER, COMMANDER, NINTH COAST GUARD DISTRICT, 240 EAST NINTH STREET CLEVELAND, OHIO TELEPHONE , OFFICE HOURS ARE M-F 0630 TO 500 EASTERN TIME (EXCEPT HOLIDAYS). 8. THE CONTRACTOR SHALL PROTECT AND CAREFULLY PRESERVE ALL PERMANENT SURVEY MONUMENTS, BENCHMARKS OR PROPERTY MARKERS WHICH ARE ENCOUNTERED DURING THE COURSE OF HIS/HER WORK. IF IT IS NECESSARY TO REMOVE ANY SUCH MONUMENT OR MARKER, THE COMMISSIONER SHALL BE NOTIFIED PRIOR TO REMOVAL. THE CONTRACTOR SHALL PROTECT AND CAREFULLY PRESERVE ALL PROPERTY MARKERS AND MONUMENTS UNTIL THE COMMISSIONER, AN AUTHORIZED SURVEYOR, OR AGENT HAS WITNESSED OR OTHERWISE REFERENCED THEIR LOCATION. ANY SUCH MONUMENT OR MARKER WHICH HAS BEEN DISTURBED BY THE CONTRACTOR SHALL BE RESET BY A REGISTERED PROFESSIONAL LAND SURVEYOR TO THE SATISFACTION OF THE COMMISSIONER AND AT NO ADDITIONAL EXPENSE TO THE CITY. 9. THE CONTRACTOR SHALL MEET ALL REQUIREMENTS OF THE CHICAGO TRANSIT AUTHORITY AT ALL TIMES THROUGHOUT THE PROJECT IN ACCORDANCE WITH THE SPECIFICATIONS. 20. THE CONTRACTOR SHALL NOT DIMENSIONS FROM THE CONTRACT PLANS FOR CONSTRUCTION PURPOSES. NO ADDITIONAL CONSTRUCTION LOADING SHALL BE PLACED ON THE BRIDGE DURING CONSTRUCTION WITHOUT THE PERMISSION OF THE COMMISSIONER. SITE ACCESS / TRAFFIC CONTROL 7. THE CONTRACTOR SHALL SUBMIT DETAILED PLANS, PROCEDURES, AND SEQUENCES OF THE. PEDESTRIAN, VEHICULAR, RIVER, AND CTA TRAFFIC MUST BE MAINTAINED AT ALL TIMES, PROPOSED WORK TO THE COMMISSIONER FOR APPROVAL PRIOR TO STARTING ANY OF THIS EXCEPT AS NOTED BELOW. WORK. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL METHODS AND PROCEDURES NECESSARY TO ACHIEVE THE PLAN DETAILS. ALL COSTS SHALL BE INCIDENTAL TO THE DURING NORMAL CONSTRUCTION ACTIVITIES, A SHOULDER CLOSURE OF VEHICULAR TRAFFIC CONTRACT. ON THE NORTH SIDE OF THE STRUCTURE IS ALLOWED IN ACCORDANCE WITH IDOT STANDARD THE CONTRACTOR SHALL OBTAIN ALL NECESSARY PERMITS FROM THE, THE STATE OF ILLINOIS, CHICAGO TRANSIT AUTHORITY, USACE, US COAST GUARD AND FULL CLOSURE OF THE STRUCTURE TO VEHICULAR, PEDESTRIAN, AND CTA TRAFFIC ARE OTHER JURISDICTIONAL AGENCIES PRIOR TO COMMENCING CONSTRUCTION. THE COSTS LIMITED TO THE FOLLOWING: SHALL BE CONSIDERED INCIDENTAL TO THE CONTRACT. - ONE () CLOSURE FOR MATERIAL DELIVERY - 36 HOUR MAXIMUM DURATION 9. ALL PARTIES INVOLVED IN CONSTRUCTION OPERATIONS WITHIN THE LIMITS OF THIS - ONE () CLOSURE FOR SHORING SYSTEM LOADING - 2 HOUR MAXIMUM DURATION PROJECT SHALL BE RESPONSIBLE FOR CONTACTING THE CHICAGO UTILITY ALERT NETWORK - ONE () CLOSURE FOR SHORING SYSTEM UNLOADING - 2 HOUR MAXIMUM DURATION (C.U.A.N.) AT , SO THE EXISTING UTILITIES AND THEIR APPURTENANCES - ONE () CLOSURE FOR MATERIAL UNLOADING - 24 HOUR MAXIMUM DURATION MAY BE LOCATED, AND ADJUSTED OR MOVED, IF NECESSARY, PRIOR TO THE START OF THE CONSTRUCTION OPERATIONS. ALL PARTIES SHALL COOPERATE WITH ALL UTILITY ALL CLOSURES SHALL BE ON WEEKENDS AND SHALL BE COORDINATED WITH THE OWNERS AS PROVIDED FOR IN THE STANDARD SPECIFICATIONS. COMMISSIONER AND CTA A MINIMUM OF TWO (2) WEEKS IN ADVANCE OF THE CLOSURE. VEHICULAR TRAFFIC SHALL BE DETOURED AS SHOWN ON SHEET C00 DURING THE 0. EXISTING UTILITIES SHOWN ON THE PLANS ARE SHOWN FOR GENERAL ORIENTATION ONLY. CLOSURES. LOCATIONS ARE APPROXIMATE AND MAY NOT INCLUDE ALL EXISTING UTILITIES AND UTILITY STRUCTURES. THE COST OF ALL TRAFFIC CONTROL WORK SHALL BE INCLUDED IN THE PAY ITEM "TRAFFIC CONTROL AND PROTECTION".. THE CONTRACTOR SHALL MAKE HIS/HER OWN INVESTIGATION TO DETERMINE THE EXISTENCE, NATURE AND EXACT LOCATION OF ALL UTILITY LINES AND APPURTENANCES MATERIAL AND/OR EQUIPMENT ACCESS INTO THE EAST AND WEST LEAFS VIA DOORS ON WITHIN THE LIMITS OF THE PROPOSED REPAIRS. THE COST OF THIS WORK WILL BE THE NORTH SIDE OF THE BRIDGE HOUSES ALONG THE RIVERWALK MUST BE COORDINATED CONSIDERED INCIDENTAL TO THE CONTRACT. WITH AND BY THE COMMISSIONER. THE CONTRACTOR SHALL BE AWARE THE ACCESS DOORS ARE LOCATED ALONG THE RIVERWALK AND ACCESS MAY BE RESTRICTED TO 2/6/208 BID ADDENDUM NO. CONTRACTOR SHALL PROTECT AND/OR RELOCATE ALL UTILITIES, WHICH WOULD BE AFFECTED BY THE CONSTRUCTION. THE CONTRACTOR SHALL SUBMIT UTILITY SUPPORT DETAILS TO THE COMMISSIONER FOR REVIEW AND APPROVAL. HANGERS, DUCTS, AND NIGHT AND/OR WEEKENDS. THE TRUNNION GIRDER SHORING TOWERS MUST BE MOVED IN ORDER TO OPEN THE BRIDGE. NO. BY DESCRIPTION INSERTS ARE TO BE FURNISHED AND INSTALLED BY THE CONTRACTOR TO THE MANUFACTURER'S RECOMMENDATIONS AND OWNER'S REQUIREMENTS. THE COST OF THIS WORK IS INCLUDED IN THE COST OF THE RELATED WORK. NO ADDITIONAL COMPENSATION WILL BE MADE TO THE CONTRACTOR FOR UTILITY SUPPORT. ALL PARTIES INVOLVED IN THE CONSTRUCTION OPERATIONS WITHIN THE LIMITS OF THIS PROJECT SHALL BE RESPONSIBLE FOR THE PROTECTION OF UNDERGROUND UTILITIES, INCLUDING THOSE THAT MAY NOT BE SHOWN ON THE PLANS. EACH PARTY SHALL BE RESPONSIBLE FOR REPAIRING OR REPLACING, AT ITS OWN EXPENSE, ANY UTILITY OR APPURTENANCES DAMAGED DURING CONSTRUCTION OPERATIONS. ONLY PERSONNEL WHEN THE EAST LEAF IS OPENED, THE MAXIMUM WIDTH BETWEEN THE REAR BREAK OF THE MOVABLE SPAN AND THE FIXED SPAN BREAK IS APPROXIMATELY 24". SEE STEEL PROCUREMENT NOTE 3 AND THE SHORING SYSTEM JACKING NOTES REGARDING MOVING THE TOWERS. CONSTRUCTION NOTES. PRE-BID VISITS AND ACCESS TO THE SITE MAY BE REQUIRED AND CAN BE ARRANGED THROUGH THE CHICAGO,. STRUCTURE NUMBER GENERAL NOTES AUTHORIZED BY THE COMMISSIONER SHALL BE PERMITTED TO PERFORM THIS WORK. ONE LEAF OF THE MOVEABLE SPAN SHALL BE OPERABLE AT ALL TIMES DURING THE CONTRACTOR IS ADVISED THAT CERTAIN OPERATIONS MAY REQUIRE COORDINATION CONSTRUCTION TO ACCOMMO RIVER TRAFFIC ON THE. WITH THE AGENCIES PERFORMING WORK WITHIN THE LIMITS OF THE PROJECT. THE CONTRACTOR SHALL COOPERATE TO THE FULLEST EXTENT WITH THESE AGENCIES IN COMPLIANCE WITH ARTICLE 007 OF THE STANDARD SPECIFICATIONS. THE CITY WILL BE RESPONSIBLE FOR OPERATION OF MOVABLE LEAFS DURING EXECUTION OF THE CONTRACT. REFERENCE SPECIAL "BRIDGE OPERATION AND MAINTENANCE" FOR THE CONTRACTOR'S RESPONSIBILITIES DURING EXECUTION OF THE CONTRACT. THE CONTRACTORS SHALL TAKE ALL NECESSARY SAFETY PRECAUTIONS TO PROTECT ABUTTING PROPERTY, UTILITIES AND PEDESTRIAN, RIVER AND VEHICULAR TRAFFIC. THE CONTRACTOR SHALL TAKE PRECAUTIONS TO PROTECT THE PUBLIC FROM FALLING DEBRIS. THE CONTRACTOR SHALL SUBMIT PLANS FOR PEDESTRIAN, RIVER AND VEHICULAR PROTECTION TO THE COMMISSIONER FOR APPROVAL PRIOR TO BEGINNING WORK. G003 2/3/207 3 OF 77 SHEETS PROJECT NO. E-4-72

2 SUMMARY OF QUANTITIES CONSTRUCTION TYPE ITEM NO. CODE NO. ITEM UNIT TOTAL QUANTITY ROADWAY BASCULE MOBILIZATION 2 TRAFFIC CONTROL AND PROTECTION 3 RAILROAD PROTECTIVE LIABILITY INSURANCE 4 REMOVAL OF EXISTING STRUCTURES 5 DISMANTLING SHORING SYSTEM, TRUNNION GIRDER 6 ERECTING SHORING SYSTEM, CTA COLUMN 7 FURNISHING AND ERECTING STRUCTURAL STEEL 8 ERECTING STRUCTURAL STEEL 9 REMOVING, FURNISHING AND ERECTING FIELD IDENTIFIED STEEL POUND 0,000 0,000 0 CLEANING AND PAINTING SELECTIVE STEEL STRUCTURES - EAST LEAF CLEANING AND PAINTING SELECTIVE STEEL STRUCTURES - WEST LEAF 2 CONTAINMENT AND DISPOSAL OF LEAD PAINT CLEANING RESIDUES 3 CDOT CONCRETE REMOVAL CU YD JACKING OPERATIONS, TRUNNION GIRDER 5 JACKING OPERATIONS, CTA COLUMN 6 BRIDGE OPERATION AND MAINTENANCE 7 FURNISH AND INSTALL PROJECT SIGN EACH CONCRETE STRUCTURES CU YD REINFORCEMENT BARS, EPOXY COATED POUND Z STRUCTURAL REPAIR OF CONCRETE (DEPTH GREATER THAT 5 INCHES) SQ FT CTA FLAGGING AND TRAINING ALLOWANCE 350, ,000 2/6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER SUMMARY OF QUANTITIES CONSULTANT 2/3/207 G004 4 OF 77 SHEETS PROJECT NO. E-4-72

3 Existing Structure: Range 4E - 3rd PM SN: , The Lake Street Bridge is a double leaf trunnion bascule bridge and was built in 96 to replace an existing swing bridge over the South Branch of the Chicago River. N W. Kinzie St. 9 Structure Vehicular, CTA, River, and pedestrian traffic to be maintained during construction. ~ Trunnion & Trunnion ~ West Bearing ~ East Bearing ~ East Bearing ~ Trunnion & Trunnion Girder ~ West Bearing Girder 39'-0" 4'-0" 4'-0" 39'-0" 8 N. Halsted St. W. Desplaines St. N. Canal St. Chicago River Wacker Dr. W. Lake St. La Sale Dr. W. Madison St. Twp. 39 N Location CTA Column Shoring; Jacked Prior to Carrying Truss Repairs See Sheet S W. Adams St. LOCATION SKETCH DESIGN SPECIFICATIONS Repair Carrying Truss Top Chord See Sheets S39-S AASTHO Standard Specifications of Highway Bridges, 7th Edition LOADING HS20-44 DESIGN STRESSES Remove Existing Concrete Pads from Pit Floor See Sheet S50 Replace Carrying Truss Bottom Chord And Diagonal Members See Sheets S00-S03 Repair Carrying Truss Inboard Gusset Plate See Sheets S36-S38 f'c = 5,000 psi (Concrete) fy = 60,000 psi (Reinforcement Bars) fy = 50,000 psi (Structural Steel) SCOPE OF WORK All structural repairs and replacement will be in-kind per the original drawings unless noted otherwise.. Carrying Truss Repairs (East Leaf): A. Reinforce Trunnion Girder ELEVATION - WEST PIT Movable Span Not Shown for Clarity ELEVATION - EAST PIT Movable Span and Temporary Shoring Not Shown for Clarity B. Shore Trunnion Girder by Jacking Existing Shoring Towers C. Shore and Jack CTA Column D. Replace Truss Bottom Chord and Diagonal Members E. Repair Truss Upper Chord Miscellaneous Repairs (East and West Leaf): A. Repair Anchor Columns B. Remove Concrete Pads on West Pit Floor C. Structural Repair of Concrete N Repair Main Truss Anchor Column See Sheet S500 Remove Existing Concrete Pads from Pit Floor See Sheet S50 Repair Main Truss Anchor Column See Sheet S500 7'-0" 42'-0" 7'-0" Remove Existing Concrete Pads from Pit Floor See Sheet S50 3'-0" 3'-0" Reinforce Trunnion Girder Prior to Trunnion Jacking See Sheets S200-S209 Existing Trunnion Girder Shoring System to be jacked prior to carrying truss repairs See Sheets S400-S403 Reinforce Trunnion Girder Prior to Trunnion Jacking See Sheets S200-S209 ~ Machinery Girder ~ Carrying Truss ~ Main Truss Repair Main Truss Anchor Column See Sheet S500 Repair Main Truss Anchor Column See Sheet S500 ~ Main Truss ~ Carrying Truss ~ Machinery Girder Clean and Paint Structural Steel Remove Existing Trunnion Girder Shoring System Remove Concrete Pads on East Pit Floor. Remove and replace lower deck lateral bracing and connection plates/angles to the truss between panel points 2 and 8 (See Sheet S502). 2/6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER GENERAL PLAN AND ELEVATION Reinforce Trunnion Girder Prior to Trunnion Jacking See Sheets S200-S209 PLAN - WEST PIT PLAN - EAST PIT S00 2/3/207 6 OF 77 SHEETS PROJECT NO. E-4-72

4 STEEL PROCUREMENT NOTES SHORING SYSTEM JACKING NOTES CONTINUED STRUCTURAL NOTES CONTINUED. Existing trunnion girder shoring system has been fabricated, installed, and loaded to 240 kips under a previous contract. The Contractor is responsible for jacking, Jacking of the CTA column shoring system shall be in accordance with the Special Provision "Jacking Operations, CTA Column" and shall be terminated at 45 kips or when " movement All structural steel shall be AASHTO M270 (ASTM A709) Grade 50. unloading, and dismantling the shoring system per Special Provisions "Jacking Operations, Trunnion Girder" and "Dismantling Shoring System, Trunnion Girder" and as shown on is observed in the CTA tracks directly above the CTA column, which ever comes first. The Contractor shall notify the Engineer if jacking is terminated due to " movement in the No field welding is permitted except as specified in the Contract Documents. Sheets S400-S4 CTA tracks. 7. All carrying truss repair steel (Sheets S36-S46), shall be considered non-redundant main load The East Leaf north and south carrying truss members as shown on Sheets S04-S35 are fabricated and will be delivered under a separate contract. Carrying truss members AA2, AA3, AA4, AA5, AA6, AA7 are assembled. The shop bolts are not fully Before, during, and after jacking the Trunnion Girder and CTA column, the structure shall be monitored via survey and the shoring systems inspected in accordance with the Special Provisions "Jacking Operations, Trunnion Girder" and "Jacking Operations, CTA Column". carrying elements subject to tensile stresses requiring conformance to fracture critical material requirements, FCM, unless noted otherwise. All carrying truss repair steel shall meet Notch Toughness Requirements of the AASHTO/AWS Fracture Control Plan (FCP). torqued. All gusset plates A are loose. It shall be the Contractor's responsibility to inspect the fabricated material prior to erection, coordinate delivery of the structural steel with the fabricator, and unload and store the material at the jobsite. Any disassembly required for placement of the steel into the pit shall be the responsibility of the Contractor. The trunnion girder shoring system may be unloaded and moved as required to allow for partial opening of the bridge for material delivery into the pit. The trunnion girder shoring system shall be reinstalled and re-loaded to 240 kips prior to reopening the bridge to vehicular, pedestrian, and CTA traffic. The Contractor shall be responsible for erection of all structural steel, including the carrying truss members. The Contractor is solely responsible for final detailing, and will not be paid extra for any field adjustments or modifications required to accomplish proper installation. Any disassembly of the previously fabricated carrying truss members as required for erection is the responsibility of the Contractor. 7. After completion of the structural steel repairs, the existing trunnion girder shoring system shall be unloaded, disassembled, and transported to a CDOT facility in accordance with the Special Provision "Dismantling Shoring System, Trunnion Girder". 8. After completion of the structural steel repairs, the CTA column shoring system shall remain loaded and in-place. SUGGESTED CARRYING TRUSS DEMOLITION AND ERECTION PROCEDURE. The procedure outlined below is a suggestion. The Contractor shall provide a demolition and erection procedure stamped by a Structural Engineer registered in the State of Illinois for review by the commissioner prior to any demolition on the carrying truss. The carrying truss shall be braced to prevent lateral movement at gusset plate A during The Contractor shall note that bolts are used in place of original rivets. It is anticipated that this change may cause some interferences and erection conflicts for bolt installation. The Contractor and the Fabricator shall review the drawings for such conflicts in detail and bring them to the attention of the Commissioner for resolution prior to fabrication. Likewise, the Contractor shall verify the fit and clearance of all new components that connect to existing or replaced sections of the structure. Where interferences occur, the Contractor shall use clipped washers, trim the edge of interfering member or install countersunk bolts as possible mitigating solutions. All modifications must be approved by the Commissioner prior to implementation. The Contractor is responsible for proper fitting and assembly of all parts of the proposed work. Plan dimensions and details relative to the existing structure have been taken from existing plans and are subject to nominal construction variations. The Contractor shall field verify existing dimensions and details affecting new construction and make necessary approved adjustments prior to construction or ordering material. Such variations shall not be cause for additional compensation for a change in the scope of the work. However, the Contractor will be paid for the quantity actually furnished at the unit price for the work. The Contractor shall be responsible for the fabrication and procurement of all structural steel not shown on Sheets S04-S3 CONSTRUCTION SEQUENCE NOTES. Some of the work in this contract is in close proximity to existing utilities. Relocation of any utilities shall not be permitted. demolition and erection. Remove and replace one half (north or south) of members AA2, AA3, AA4, and AA7. The same half of all members should be removed. Remove and replace members AA6 and AA5 in one piece. Only one member per carrying truss shall be removed and replaced at any time. Remove and replace the A gusset plate corresponding to the side of the carrying truss replaced in Step 0. The location and diameter of the holes in new connecting material must match holes in the existing structure. Bolt and rivet spacings and sizes must be verified in the field by the Contractor prior to ordering material for fabrication. Holes in the existing structure may be enlarged only as approved by the Commissioner and in accordance with the Special Provisions "Erect Structural Steel" or "Furnish and Erect Structural Steel". Holes may be sub-punched or sub-drilled in the new material and field reamed to match existing holes provided the sub-hole is fully contained in the outline of the reamed hole. Final holes must be round and may not be oversized. The cost of this work shall be considered incidental to the pay item to which it pertains. Existing trunnion girder shoring system has been installed and loaded to 240 kips on both the north and south towers under a separate contract. Remove and replace the remaining half of carrying truss members AA2, AA3, AA4, and AA7. Only one member per carrying truss may be removed and replaced at any time.. All contact surfaces on new and existing steel, including connection bolts, nuts, and washers, shall be free of scale, burrs, dirt, or other foreign material, oil, previously applied paint, lacquer, or Remove and replace the remaining A gusset plate. other coatings that would prevent solid seating of the connecting parts. Trunnion girder reinforcement (Sheets S200-S209) shall be completed prior to jacking the existing trunnion girder shoring system or the CTA column shoring system. 7. Both carrying trusses may be worked on simultaneously. Reinforcement bars designated (E) shall be Epoxy Coated. Existing trunnion girder shoring system and CTA column shoring system shall be jacked PAINTING NOTES All construction joints shall be bonded. (Sheets S300-S43) prior to performing the carrying truss repairs. Carrying truss repairs (Sheets S00-S40) shall be completed prior to unloading the existing trunnion girder shoring and CTA column shoring.. The Contractor shall clean and paint all components of the East and West Leaf carrying trusses, the bottom 0'-0" of the East and West Leaf anchor columns, and the entire length of the East and West Leaf trunnion girders. The existing structural steel coating contains lead. The Contractor shall take appropriate Reinforcement bars must conform to the requirements of ASTM A706 Gr. 60. All exposed edges of concrete must be chamfered ƒ" unless other members are erected flush with them. TRUNNION GIRDER REINFORCEMENT NOTES precautions to deal with the presence of lead on this project. See Special Provisions "Containment and Disposal of Lead Paint Cleaning Residues". Plans to be worked in conjunction with existing drawings series thru , which can be obtained from the City of Chicago, 30 North LaSalle Street Chicago, IL The trunnion girder shoring system shall be loaded to 240 kips for the duration All new and existing steel shall be cleaned and painted utilizing Paint System - OZ/E/U. trunnion girder reinforcement work. The color of the final finish coat shall match Munsell Glossy 5B 7/ Gray. Cost included in the pay item "Cleaning and Painting Structural Steel". TOTAL BILL OF MATERIAL The trunnion girder reinforcement may be installed in any order. Both ends (north and south) of the trunnion girder may be worked on simultaneously. SHORING SYSTEM JACKING NOTES. All jacking operations shall be performed with the structure closed to CTA, vehicular, and pedestrian traffic. The existing trunnion girder shoring system has been installed and loaded to 240 kips at both the north and south towers under a previous contract. Jacking of the existing trunnion girder shoring system shall be in accordance with the Special Provision "Jacking Operations, Trunnion Girder" and shall be terminated at,00 kips (per tower including existing 240 kips pre-load) or when " movement is observed in the CTA tracks, which ever occurs first. The Contractor shall notify the Engineer if jacking is terminated due to " movement in the CTA tracks. Jacking of the existing trunnion girder shoring system will not relieve all load from the carrying trusses, and the Contractor shall be responsible for the stability of the bascule bridge in all phases of construction. Prior to replacement of steel members, the Contractor shall submit a construction procedure showing each step of the removal and replacement process and calculations sealed by a Licensed Structural Engineer in the State of Illinois showing that all members will remain stable and not become overstressed during any step of the removal and replacement process. All new structural steel shall be shop primed, and faying surfaces shall be prepared in accordance with IDOT GBSP 2 "Cleaning and Painting Contact Surface Areas of Existing Structures". The existing structural steel shall be cleaned per near white blast cleaning, SSPC-SP0, and shall be painted in accordance with IDOT GBSP "Cleaning and Painting Existing Steel Structure". When approved by the Commissioner, East Leaf Carrying Truss structural steel installed under a separate contract in may be cleaned by alternate methods. All motors and machinery shall be properly protected from cleaning and painting work. STRUCTURAL NOTES. Fasteners shall be ASTM A325 Type, Mechanically Galvanized Bolts. Bolts "} with "} open holes, unless otherwise noted. Domestic Steel Act: All iron and steel products which are to be incorporated into state projects shall be domestically manufactured and produced or fabricated. The Contractor shall obtain from the iron or steel producer and/or fabricator, in addition to the mill analysis, a certification that all iron or steel materials meet these domestic source requirements. The application of all coatings, epoxy, galvanizing, painting, etc. to metal products shall be domestically applied. Calculated weight of Furnish and Erect Structural Steel = 57,90 Lbs (includes 0% for bolts). See Sheets S36-S40 and S202-S209 for Furnish and Erect Structural Steel. Calculated weight of Erect Structural Steel = 46,00 Lbs (includes 0% for bolts). See Sheets S04-S35 for Erect Structural Steel. ITEM UNIT SUPER SUB TOTAL Removal of Existing Structures Dismantling Shoring System, Trunnion Girder Erecting Shoring System, CTA Column Furnishing and Erecting Structural Steel Erecting Structural Steel Removing, Furnishing and Erecting Pound 0,000 0,000 Field Identified Steel Cleaning and Painting Selective Steel Structures - East Leaf Cleaning and Painting Selective Steel Structures - West Leaf Containment and Disposal of Lead Paint Cleaning Residues Concrete Removal Jacking Operations, Trunnion Girder jacking Operations, CTA Column Bridge Operation and Maintenance Concrete Structures Reinforcement Bars, Epoxy Coated Structural Repair of Concrete (Depth Greater than 5 Inches) Cu Yd Cu Yd Pound Sq Ft /6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER GENERAL NOTES AND BILL OF MATERIALS S002 2/3/207 7 OF 77 SHEETS PROJECT NO. E-4-72

5 COMPONENT REFERENCE FILES TRUSS & TRUSS TOP CHORD , & TRUSS MEMBER AA TRUSS MEMBER AA TRUSS MEMBER AA & TRUSS MEMBER AA Bottom Flange Angle See Sheet S36 Match Line A-A (See Sheet S00) Repair Top Chord Web See Sheet S40 Truss Member AA5 See Note TRUSS MEMBER AA6 TRUSS MEMBER AA7 GUSSET PLATE A A6 A4 A5 A2 Truss Member AA6 See Note Remove and Replace Truss Member AA4 See Note. Steel for Carrying Truss members AA2, AA3, AA4, AA5, and AA6, and AA7 and Gusset Plate A has been purchased by CDOT and fabricated by Munster Steel Co., Inc (Munster). See Sheets S04-S35 for shop drawings by Munster. Truss Member AA7 See Note Truss Member AA2 See Note Remove and Replace Gusset Plate A 2/6/208 BID ADDENDUM NO. Truss Member AA3 See Note NO. BY DESCRIPTION See Note A STRUCTURE NUMBER CARRYING TRUSS ELEVATION INBOARD 2 INBOARD ELEVATION - EAST LEAF SOUTH CARRYING TRUSS INBOARD ELEVATION - EAST LEAF NORTH CARRYING TRUSS (OPP. HAND) 2/3/207 S0 9 OF 77 SHEETS PROJECT NO. E-4-72

6 COMPONENT REFERENCE FILES TRUSS & TRUSS TOP CHORD , & TRUSS MEMBER AA Match Line B-B (See Sheet S02) Truss Member AA5 See Note TRUSS MEMBER AA3 TRUSS MEMBER AA4 TRUSS MEMBER AA5 TRUSS MEMBER AA6 TRUSS MEMBER AA & GUSSET PLATE A A6 A4 A5 A2 Truss Member AA6 See Note Truss Member AA7 See Note Remove and Replace Truss Member AA4 See Note. Steel for carrying truss members AA2, AA3, AA4, AA5, AA6, and AA7 and gusset plate A has been purchased by the owner and fabricated by Munster Steel CO., Inc (Munster). See Sheets S04-S35 shop drawings by Munster. Truss Member AA2 See Note Truss Member AA3 A Gusset Plate A See Note See Note 2/6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER OUTBOARD ELEVATION - EAST LEAF NORTH CARRYING TRUSS INBOARD ELEVATION - EAST LEAF SOUTH CARRYING TRUSS (OPP. HAND) CARRYING TRUSS ELEVATION OUTBOARD 2 2/3/207 S03 OF 77 SHEETS PROJECT NO. E-4-72

7 COMPONENT REFERENCE FILES ~ Carrying TRUNNION GIRDER & ~ Machinery Girder 7'-0" Truss 6'-3 " 5'-0" 7" 3 " 3 " 3 " 2 8 5" = 3'-4" 3" '-3 " '-3" " F L 3 "=6 " E Detail M x '-3" Cope ƒ " G ` ƒ"x34"x6'-8 " G " 4" " L4x4x x2'-0" L4x4x x5'-0" N.S. & F.S. " Gap Edge of New Web ` Edge of Exist. ƒ" Fill ` '-2". Bolt spacing shall match existing rivet spacing unless noted otherwise. All dimensions to existing rivets shall be verified in the field. For Sections E-E through G-G see Sheet S20 6'- " 4 " 8 6" = 4'-0" End ` "x34"x6'-" L4x4x x5'-9" F.S. L5x3x x5'-0 " L4x4x x2'-0" H J Detail N J Web ` ƒ"x73 "x6'-3 " L4x4x x5'-9" F.S. ` "x4 "5'-Š" ` "x4 "5'-9" F.S. H Splice ` ƒ"x8"x4'-0 " F.S. Splice ` ƒ"x8"x3'-8 " N.S. Exist. L7x3 x Exist. " ` K Mill to Bear on Exist. ` Exist. ƒ" ` N.S. & F.S. "R K 2 " 5 8" = 3'-4" 2 " " '-2" 3'-8 " Gap For Sections H-H through L-L see Sheet S207. For Details M and N see Sheet S208. LEGEND Indicates Removal of Existing Rivets and Replacement with New " } Bolts Indicates New " } Bolt Indicates Existing Rivets to Remain Indicates Existing Rivets to be Removed 2/6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER ` ƒ"x4 "x2'-0" Exist. L7x3 xƒ & ƒ" Fill ` 8 " Exist. ƒ" ` (Typ.) TRUNNION GIRDER REINFORCEMENT CONSULTANT ELEVATION 2-2 x'-2" Cope ( ) F L E ELEVATION 2-2 S205 2/3/ OF 77 SHEETS PROJECT NO. E-4-72

8 OF FOR REFERENCE ONLY. See Special Provisions "Jacking Operations, Trunnion Girder" and "Dismantling Shoring System, Trunnion Girder" and Sheet S002 for details related to jacking and dismantling the trunnion shoring system. Remove concrete leveling pads after trunnion girder shoring system has been removed. Payment shall be at unit price for "Concrete Removal". Approximate quantity is 39.0 Cu. Yd. 2/6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER TRUNNION SHORING PLANS AND DETAILS CONSULTANT 2/3/207 S400 6 OF 77 SHEETS PROJECT NO. E-4-72

9 FOR REFERENCE ONLY. See Special Provisions "Jacking Operations, Trunnion Girder" and "Dismantling Shoring System, Trunnion Girder" and Sheet S002 for details related to jacking and dismantling the trunnion shoring system. Remove concrete leveling pads after trunnion girder shoring system has been removed. Payment shall be at unit price for "Concrete Removal". Approximate quantity is 39.0 Cu. Yd. 2/6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER TRUNNION SHORING ELEVATION 2/3/207 S40 62 OF 77 SHEETS PROJECT NO. E-4-72

10 FOR REFERENCE ONLY. See Special Provisions "Jacking Operations, Trunnion Girder" and "Dismantling Shoring System, Trunnion Girder" and Sheet S002 for details related to jacking and dismantling the trunnion shoring system. Remove concrete leveling pads after trunnion girder shoring system has been removed. Payment shall be at unit price for "Concrete Removal". Approximate quantity is 39.0 Cu. Yd. 2/6/208 BID ADDENDUM NO. NO. BY DESCRIPTION STRUCTURE NUMBER TRUNNION SHORING ELEVATION 2 2/3/207 S OF 77 SHEETS PROJECT NO. E-4-72