UTILITY ISOLATION JOINT LAYOUT GENERAL NOTES THE CONTRACTOR IS

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					           UTILITY ISOLATION & JOINT LAYOUT


     GENERAL NOTES :                                                                  5. UTILITY AND DRAINAGE STRUCTURE ISOLATION


1.   THE CONTRACTOR IS RESPONSIBLE FOR THE FINAL JOINT LAYOUT BASED ON THE ACTUAL          A.   FOLLOW THE ’TYPICAL UTILITY ISOLATION GUIDELINES’ TABLE ON STANDARD
     LOCATIONS OF UTILITIES AND DRAINAGE STRUCTURES WITHIN THE PAVEMENT AND                     SHEET M502-18 TO SELECT THE APPROPRIATE ISOLATION METHOD.
     CONSTRUCTION STAGING. THE CONTRACTOR MUST SUBMIT A PROPOSED JOINT LAYOUT
     TO THE ENGINEER AT LEAST 10 DAYS BEFORE PAVING BEGINS. THE CONTRACTOR WILL            B.   WHEREVER POSSIBLE, USE TELESCOPING MANHOLE CASTINGS TO INTEGRALLY CAST
     REVISE THE PLAN UNTIL IT MEETS THE ENGINEER’S APPROVAL. PAVING SHALL NOT BEGIN             THE UTILITIES INTO THE PCC SLAB. REFER TO CONDITIONS (A), (B), (K), AND (L)
     UNTIL THE JOINT LAYOUT IS APPROVED BY THE ENGINEER.                                        ON STANDARD SHEET M502-18.


                                                                                           C.   IF A TELESCOPING CASTING CAN NOT BE USED (SEE STANDARD SHEET M502-19,
2.   JOINT LAYOUT METHODOLOGY                                                                   NOTE 2), USE A NON-TELESCOPING CASTING OR A SHALLOW UTILITY ISOLATION.                                                                        LEGEND
                                                                                                REFER TO CONDITIONS (C), (E), (F), (H), AND (J) ON STANDARD SHEET M502-18.
     A.   LOCATE LONGITUDINAL JOINTS.                                                                                                                                                                                      FOR PLAN VIEW DETAILS
                                                                                           D.   IF THE MASONRY PORTION OF SHALLOW UTILITIES OR UTILITIES WITH
                                                                                                                                                                                                                           ON STANDARD SHEETS M502-18 THROUGH M502-24
     B.   LOCATE UTILITIES AND DRAINAGE STRUCTURES. WHENEVER POSSIBLE, POSITION                 NON-TELESCOPING CASTINGS FALLS WITHIN 300 mm OF THE PROJECTED
          UTILITIES AND DRAINAGE STRUCTURES (OTHER THAN CATCH BASINS) SUCH THAT                 LONGITUDINAL JOINT, OFFSET THE LONGITUDINAL JOINT SUCH THAT A 300 mm
          (1) THE STRUCTURES ARE BETWEEN WHEEL PATHS, AND (2) THE STRUCTURES ARE                CLEARANCE IS ACHIEVED BETWEEN THE MASONRY AND THE LONGITUDINAL JOINT.                                                       FEATURE                                   SYMBOL
          LONGITUDINALLY SPACED TO ALLOW OPTIMAL ISOLATION TECHNIQUES (REFER TO                 THE WIDENED SLAB CONTAINING THE STRUCTURE AND THE NARROWED ADJACENT
          STANDARD SHEET M502-23, DETAILS A, C, D, & F).                                        SLAB MUST BOTH MEET THE GEOMETRIC REQUIREMENTS IN NOTE 3A. IF THESE                                                TRANSVERSE CONTRACTION JOINT
                                                                                                REQUIREMENTS CAN NOT BE MET, OMIT THE OFFSET LONGITUDINAL JOINT
     C.   SELECT A TELESCOPING CASTING OR THE MOST APPROPRIATE ISOLATION                        AND ISOLATE THE STRUCTURE IN A SINGLE PLACEMENT THAT IS TWO SLABS WIDE.                                            TRANSVERSE EXPANSION JOINT                               E
          TECHNIQUE FOR EACH UTILITY, DRAINAGE STRUCTURE, AND/OR GROUP THEREOF AS               THIS PLACEMENT MUST ALSO MEET THE GEOMETRIC REQUIREMENTS IN NOTE 3A.
          DESCRIBED IN NOTE 5 AND THE ’TYPICAL UTILITY ISOLATION GUIDELINES’ TABLE              REFER TO CONDITIONS (D) AND (G) ON STANDARD SHEET M502-18.                                                         TRANSVERSE ISOLATION JOINT                               I
          ON STANDARD SHEET M502-18.
                                                                                           E.   WHEN MULTIPLE UTILITIES ARE LOCATED SUCH THAT INDIVIDUAL ISOLATION IS NOT                                          TIED LONGITUDINAL JOINT                                  L
     D.   LOCATE THE TRANSVERSE JOINTS AND UNTIED LONGITUDINAL (SHEAR KEY)                      POSSIBLE, ISOLATE THE ENTIRE GROUP OF UTILITIES IN A HEAVILY REINFORCED
          JOINTS NEAR UTILITIES AND DRAINAGE STRUCTURES.                                        SLAB. REFER TO CONDITIONS (M) AND (N) ON STANDARD SHEET M502-18.                                                   UNTIED LONGITUDINAL
                                                                                                                                                                                                                                                                            S
                                                                                                                                                                                                                   JOINT (SHEAR KEY)
     E.   EQUALLY SPACE REMAINING TRANSVERSE JOINTS BETWEEN THOSE TRANSVERSE               F.   WHEN UTILITIES AND/OR DRAINAGE STRUCTURES IN ADJACENT LANES PRECLUDE AN
          JOINTS PLACED IN CONJUNCTION WITH UTILITIES AND DRAINAGE STRUCTURES SUCH              OPTIMAL SOLUTION FOR EACH STRUCTURE, THE ISOLATION METHODS SHALL BE
                                                                                                                                                                                                                   NON-TELESCOPING MANHOLE CASTING                     M.H.
          THAT THE DESIGN SLAB LENGTH IS ACHIEVED (3.5 m TO 5.5 m TYPICAL).                     PRIORITIZED AS FOLLOWS:


     F.   DESIGN AND LAYOUT THE LONGITUDINAL JOINT TIES AND TRANSVERSE JOINT                    1.   STRUCTURES IN THE TRAVEL LANE CARRYING THE GREATEST NUMBER
          SUPPORTS.                                                                                  OF TRUCKS                                                                                                     TELESCOPING MANHOLE CASTING                         M.H.


     PCC SLAB ASPECT RATIO & SLAB GEOMETRY                                                      2.   STRUCTURES IN OTHER TRAVEL LANES

                                                                                                                                                                                                                   SHALLOW UTILITY
     A.   THE ASPECT RATIO (W/L) IS THE RATIO OF SLAB WIDTH (W) TO SLAB LENGTH (L).             3.   STRUCTURES IN PARKING LANES, SHOULDERS, GORE AREAS, AND OTHER                                                                                                    M.H.       OR   M.H.
                                                                                                                                                                                                                   (TOP OF STRUCTURE IS IN PCC PAVEMENT)
          FOR SLABS ROUTINELY EXPOSED TO TRAFFIC, CONSTRUCT SLABS MEETING THE                        NON-TRAVELED AREAS
          THE FOLLOWING GEOMETRIC CRITERIA :
                                                                                                                                                                                                                                                                        S
                                                                                                                                                                                                                   DRAINAGE STRUCTURE ISOLATION
          1.   0.65 l W/L l 1.37,                                                     6.   CONSTRUCTION SEQUENCE AT ISOLATED UTILITIES AND DRAINAGE STRUCTURES




                                                                                                                                                                                                                                                                  I




                                                                                                                                                                                                                                                                                 I
                                                                                                                                                                                                                   (NOT EXPOSED TO TRAFFIC)
          2.   2.3 m l W l 5.5 m, AND
          3.   3.5 m l L l 5.5 m.                                                          A.   FORM ISOLATION JOINT.
                                                                                                                                                                                                                                                                        S
                                                                                                                                                                                                                   DRAINAGE STRUCTURE ISOLATION




                                                                                                                                                                                                                                                                  E




                                                                                                                                                                                                                                                                                 E
     B. TYPICAL TRAVEL LANES WITHOUT UTILITIES HAVE INNER AND OUTER SLAB WIDTHS            B.   CONSTRUCT THE PAVEMENT OUTSIDE THE ISOLATION JOINT.
                                                                                                                                                                                                                   (EXPOSED TO TRAFFIC)
          OF 3.6 m AND 4.2 m, RESPECTIVELY, WITH SLAB LENGTHS OF 5.5 m. THIS
          RESULTS IN ASPECT RATIOS OF 0.65 AND 0.76. THUS, FOR SLABS WITHOUT               C.   SAWCUT TRANSVERSE AND LONGITUDINAL JOINTS, FIRST STAGE.
          UTILITIES, THE ASPECT RATIO APPROACHES MINIMUM VALUES. FOR SLABS WITH                                                                                                                                    WIRE MESH REINFORCED SLAB
          SINGLE UTILITIES OR DRAINAGE STRUCTURES, THE ASPECT RATIO APPROACHES             D.   REMOVE ISOLATION FORM AND TEMPORARY SUPPORT.
          MAXIMUM VALUES BECAUSE THESE SLABS HAVE REDUCED LENGTHS (REFER TO
                                                                                                                                                                                                                   HEAVILY REINFORCED SLAB
          STANDARD SHEETS M502-19 THROUGH M502-23). THE GEOMETRIC CRITERIA IN              E.   SAWCUT TRANSVERSE AND LONGITUDINAL JOINTS, SECOND STAGE.
          NOTE 3A DO NOT APPLY TO HEAVILY REINFORCED SLABS DEPICTED ON
          STANDARD SHEET M502-24 OR TO CATCH BASIN ISOLATION SLABS DEPICTED                F.   PLACE PREMOULDED RESILIENT JOINT FILLER AROUND THE INNER                                                           LONGITUDINAL JOINT TIE
          ON STANDARD SHEETS M502-22 AND M502-23.                                               PERIPHERY OF THE ISOLATION.                                                                                        OR DEFORMED REINFORCING BAR


     C.   IF PROJECT CONSTRAINTS RESULT IN NARROWER TRAVEL LANES OR REDUCED SLAB           G.   PLACE CONCRETE WITH REINFORCEMENT INSIDE THE ISOLATION.                                                            TRANSVERSE JOINT DOWEL BAR
          LENGTHS FROM THOSE DEPICTED ON STANDARD SHEET M502-11, THE ASPECT RATIO
          REQUIREMENTS OF NOTE 3A MUST BE SATISFIED. IT IS HIGHLY PREFERABLE TO            H.   SAWCUT AND SEAL THE ISOLATION JOINT.
          CONSTRUCT PCC SLABS SUCH THAT LONGITUDINAL JOINTS BETWEEN TRAVEL
          LANES ARE ALIGNED WITH PAVEMENT MARKINGS.                                        I.   SEAL TRANSVERSE AND LONGITUDINAL JOINTS.


     D.   IF PROJECT CONSTRAINTS RESULT IN NARROWER PCC SHOULDERS THAN THOSE                    NOTE: STEPS (C.) AND (D.) ABOVE MAY BE REVERSED.
          DEPICTED ON STANDARD SHEET M502-11, IT IS PREFERABLE TO CONSTRUCT THE
          SHOULDER(S) AND ADJACENT TRAVEL LANES SIMULATENOUSLY, PROVIDED THE
          GEOMETRIC CRITERIA IN NOTE 3A ARE SATISFIED. NO LONGITUDINAL JOINT IS
          REQUIRED IN THIS CASE.


     TRANSVERSE JOINT TYPE SELECTION


     A.   THERE ARE THREE BASIC TYPES OF TRANSVERSE JOINTS: CONTRACTION,
          CONSTRUCTION, AND EXPANSION. THESE JOINTS CONTROL CRACKING, ACCOMMODATE
          SLAB MOVEMENT, AND PROVIDE LOAD TRANSFER. IT IS ESSENTIAL TO PROPERLY
          COAT AND ALIGN DOWELS TO ALLOW FREE SLAB MOVEMENT. SEE STANDARD
          SHEETS M502-15 AND M502-16 FOR TRANSVERSE JOINT DETAILS.
                                                                                                                                                                  JOINT DETAIL REFERENCE
     B.   GENERALLY, TRANSVERSE JOINTS EXTEND ACROSS THE FULL PAVEMENT WIDTH AND                                                                                                                                                          SHEET NOTES :
          ARE ALIGNED PERPENDICULAR TO THE LONGITUDINAL JOINT. TRANSVERSE JOINT                                                                                                    FOR DETAIL SEE
          TYPE, LOCATION, AND/OR ALIGNMENT MAY CHANGE WHEN A TRANSVERSE JOINT                                                                            FEATURE                                                                            - ’PCC’ STANDS FOR PORTLAND CEMENT CONCRETE
          INTERSECTS AN UNTIED LONGITUDINAL (SHEAR KEY) JOINT.
                                                                                                                                                                                   STANDARD SHEET                                           - ALL DIMENSIONS IN MILLIMETERS UNLESS OTHERWISE NOTED

                                                                                                                                              TRANSVERSE CONTRACTION JOINT    M502-15, DETAIL ’A’
     C.   CONTRACTION JOINTS ARE BY FAR THE MOST COMMON TYPE OF TRANSVERSE JOINT.
          SPACE CONTRACTION JOINTS TO ACHIEVE 3.5 m TO 5.5 m SLAB LENGTHS.                                                                    TRANSVERSE EXPANSION JOINT      M502-15, DETAIL ’B’
                                                                                                                                                                                                                                                                      STATE OF NEW YORK
                                                                                                                                              TRANSVERSE ISOLATION JOINT      M502-15, DETAIL ’C’
                                                                                                                                                                                                                                                             DEPARTMENT OF TRANSPORTATION
     D.   CONSTRUCTION JOINTS ARE USED AT PAVING INTERRUPTIONS. THEY ARE AS WIDE
                                                                                                                                              TIED LONGITUDINAL JOINT         M502-12, DETAILS ’A’, ’B’, AND ’C’
          AS THE CONCRETE PLACEMENT, TYPICALLY ONE OR TWO LANES, NOT NECESSARILY
          FULL WIDTH. ALIGN CONSTRUCTION JOINTS WITH ADJACENT TRANSVERSE JOINTS.                                                              UNTIED LONGITUDINAL             M502-12, DETAILS ’D’ AND ’E’
                                                                                                                                              JOINT (SHEAR KEY)                                                                                               METRIC STANDARD SHEETS

     E.   EXPANSION JOINTS SHOULD BE USED SPARINGLY. THEY ISOLATE AND PROTECT
          PAVEMENTS AND STRUCTURES FROM CONCRETE MOVEMENT AND VOLUME CHANGES.
          EXPANSION JOINTS ARE REQUIRED AT INTERSECTIONS AND ISOLATED UTILITIES                                                                                                                                                                  UTILITY ISOLATION AND JOINT LAYOUT
          EXPOSED TO TRAFFIC.
                                                                                                                                                                                                                                                            GENERAL NOTES
     F.   ISOLATION JOINTS ARE NOT CAPABLE OF TRANSFERING LOADS BECAUSE THEY DO
          NOT CONTAIN LOAD TRANSFER DEVICES. THEREFORE, THEY ARE ONLY USED TO
          ISOLATE UTILITIES AND DRAINAGE STRUCTURES IN AREAS NOT ROUTINELY EXPOSED                                                                                                                                                          APPROVED                    , 2000        ISSUED UNDER EB 00-051

          TO TRAFFIC.

                                                                                                                                                                                                                                                 /S/ P.J. CLARK                          M502-17
                                                                                                                                                                                                                                            DEPUTY CHIEF ENGINEER
                                                                                                                                                                                                                                            (DESIGN)

				
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