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HomeMy WebLinkAbout035-97.specifications2y 0 r 1 N � [) EARTHWORK 1. SCOPE OF WORK: ' 'A: Extent: The work required under this section cons�.sts oi all excavating, filling, rough grading and related items necessary to complete the�work indicated on the drawings and described in the specifications. , 1. In general the items of work to be performed under this section shall include: cle�►ring and grubbing, removal of trees and �tumps (where required), protection of trees to x�emain, stripping and � storage of topsoil, fill Compaction and rough grading of entire site within the contract limit lines as indicated on the drawings. 2. Excavated material that is suitable may be used for fills. All t�nsuitable material and all surplus excavated material not required shall be removed from the site. The location of dump and length of haul shall be the Contractor's responsibility. , 3. Provide and place any additional fi11 material from off t2ie site as may be necessary to produce - ' the grades required. Fill obtained from off site. ' sh_all be of kind and quality as specified for fills herein and the source approved by the Owner. 4. �The Contractbr shall accept the site a's he finds it and shall remove all trash, rubbish and debris from the site prior to starting excavation. �B. Work not included: The fo2lowing items of related work are sp�cified and included in other sections of these �specifications: 1. Excavation, grading and backfilling for utility lines. 2. � Storm sewer systems. 2.. BENCH MARKS; Maintain carefully' all bench marks, monuments and other reference points; if dist�rbed or destroyed, replace as directed. 3. REMOVAL OF TREES: A. Remove all trees and stumps from area to be occupied by buildings, roads and surfaced areas. Removal of trees outside these areas shall only be done as noted on drawings or approved by the Owner. B: ,All brush, stumps, wood and other refuse from the �rees sha11 be removed to disposal areas off of the site. , Dispos�l by burning shall not be permit�ed. 4, PROTECTION OF TREES: A. General Protection: The Contractor shall be responsible for the prot�ction of tops, trunks and roots of existing trees on the project site that are to remain. � Exi�ting trees subject to construction damage shall be boxed, fenced or otherwise prote�ted before any work is started; do not stockpile within branch spread. Remove interfering branches without injury to trunks and cover scars with tree pai�t. 5. STRIPPING O�' TOPSOIL: A. Remove topsoil to a depth of 6 inchesWalks and aparking be occupied by buildings, roads, areas. Pile and store topsoil at a location where it will not interfere with construction operations. Topsoil shal.l be reasonably free from subsoil, debris and stones. , 5. DISPOSiTION OF UTILITIES: A. Rules and regulations governing the respective utilities shall be observed in executing all work under this section. g. Where active utiiities are encountered.but not shown on the drawings, the.Engineer shall be advised before work is: continued. C. Inactive and abandoned tionstshallebe�reported to exca�+ating and grading opera ed or ca ed the Engineer. They shall be rA'tnoved, plugg PP as direc�ed by the Engineer. 7. SITE GRADING: � A.. Grades: Do all cutting, filling, compacting of fills � and rough grading required to bring entire project area to subgrade as shown on the drawings. B. Rough Grading: The tolerance for paved areas shall not exceed 0.10 feet above established subgrade. All other areas sh�ll not exceed 0.10 feet plus or minus the established grade. Provide roundings at top and bottom o£ banks and otlier breaks in grade. � STORM SEWER SYSTEMS 1. SCOPE OF WORK: The work under this section includes all sborm sewers, 'manholes, storm water inlets, and related items, including excavating ahd backfilling►startinsar,�WOO feetleoutside Wthe shown on the drawings, 5 building walls. 2. MATERIALS: A. Storm Sewers: � 1. Reinforced concrete sewer pipe shall conform to ASTM C-76 latest revision with joints conforming to ASTM C-443 latest revision. ,2. Corrugated metal pipe shall be standard helical or riveted pipe made from zinc-coated iron or steel� sheets which shall conform to ASTM A-444 latest revision. Couplers shall be made of the same zinc-coated base metal as the pipe. When specified, the pipe shall be uniformly bituminous coated inside and out to a minimum thickness of 0.05 inches. B. Manholes: � 1. Precast reinforced concrete manhole sections and steps shall conform to ASTM C-478 latest revision. 2. Castings shall be of uniform quality, free from blow holes, porosity, hard spots, shrinkage distortion or other defects. They shall be smooth � and well-cleaned by shotblasting or by some other approved method. They shall be coated with asphalt paint which shall result in a smooth coating, tough and tenacious when cold, not tacky or brittle. � They shall be gray iron meeting ASTM. A-48 latest revision. 3. Joints - manhole seetions shall be jointed with either mastic in bulk, �tick or rubber type gaskets. The rubber type gaskets shall meet ASTM C-443 latest revision. 3. , APPLICATION: + A, Permits and Codes: The intent of thi.s section of the specifications is that the contractor's bid on the work covered herein shall be based upon the drawings and specifications but that the work shall comply with all applicable codes and regulations as amended by any waivers. Contractor shall furnish all bonds necessary to get permits for cuts,and connections to existing sewers. B. Local Standards: The term "Local Standards" as used herein means the standards of design and construction of the respective municipal department or u�ility company.. C. Existing Improvements: Maintain �in operating condition all active utilities, sewers and other drains encountered in the sewer installation. Repair to the satisfaction of the owner any damage to existing active improvements. D. Workmanship: To conform to all local, state and national codes and to be approved by al1 local and s�ate agencies having jurisdiction. � E. Trenching: Lay all pipe in open trenches, except when the local authority gives written perm�.ssion for tunneling. Open the trench sufficiently ahead of pipe- laying to reveal any obstructions. The width of the trench shall be the inside pipe diameter plus 24 inches for 12 inches above the pipe. Sheet and brace trench as necessary to protect workmen and adjacent structures. Al1 trenching to comply with the Occupational Safety and Health Administration Standards. Keep trenches free from water while construction is in progress. Under no circumstances lay pipe or appurtenances in standing water. Conduct the discharge from trench dewatering to drains or natural drainage channels. F. Special Supports: Whenever, in the opinion of the Engineer, the soil at or below the pipe grade is unsuitable for supporting sewers and appurtenances specified in this section, such special support, in addition to those shown or specified, shall be provided as the Engineer may direct, and the contract will be adjusted. G. Backfilling: For a depth of at least 12 inches above � the top of the pipe, backfill'�ith �arth or granular material free from large stones, rock fragments, roots or sod. Tamp this backfill thoroughly, tak�.ng care not to disturb the pipe. For the remaining trench depth, backfill with earth or granular material containing stones or rocks not larger than 4 inches. Sackfill under walks, parking areas, driveways and streets shall be granular material only - thoroughly compacted. H. Manhole Inverts: Construct manhole flow Channels of concrete, sewer pipe'or brick, smoothly finished and of semi-circular section conform�.ng to the inside diameter of the connecting sewers. Make changes in size or grade gradually and changes in direction by true curves. Provide such channels for all connecting sewers at each manhole. ,! PARKING, STREETS AND WALKS 1. SCOPE OF WORK: The work required under this section includes all concrete and bituminous paving and related items necessary to complete the work indicated on drawings and described in the specifications, including but not limited to: All streets and parking areas in contract limits Curbs and gutters Walks Exterior steps 2. MATERIALS: A. Concrete: Concrete shall be ready-mixed concrete and shall be a mix of proportioned fine and coarse aggregates with Portland cement and water. Minimum cement content shall be 6 bags per cubia ,y�rd of � concrete and maximum water content sha11 be 5,5 U.S. gallons per sack of cement, including moisture in the � �aggregate. Slump for normal weight concrete shall be a maximum of 4 inches and a minimum of 2 inches. The slump ot machine place concrete shall be no less than. 1-1/4 inches nor more than 3 inches. Standard test ASTM C-143 shall be used to measure slu;np. Compressive strength of concrete at 28 days shall be 4000 psi. All exterior concrete shall have air entrainmer�t of 5o to 8� by volume per ASTM C-260. Retempering of delivered concr�te will not be allowed. Concrete shall be composed of: 1. Portland cement: Conforming to ASTM C-150, Type IA or Type IIIA. 2. Aggregates: Conforming to ASTM C-33. 3. Water: Shall be clear and fre� from injurious . amounts of oils, acids, alkalies, organic materials or other deleterious substances. B, Welded Steel Wire Fabric: Where required for concrete reinforcement shall conform to ASTM A185. C. Premoulded Joint �'iller: Shall be of non-extruding type meeting ASTM D-544, except that premoulded joint filler used in concrete walk construction may be either non-extruding or resilient. D. Bituminous Pavement Materials: All materials proposed for the construction of bituminous pavements sh�ll comply with the Indiana State Higtiway Specifications, per latest revisions. E.. Compacted Aggregate Subbase: Shall be crushed stone or gravel. Crustied gravel shall be a minimum of 35� crushed material. Chert shall be limited to a maximum of 8� of the total. Material shall be free from an excess of flat, elongated, thinly laminated, soft or disintegrated pieces; and shall be free from fragments coated with dirt. Compacted aggregate shall be gzaded as follows: SIEVE SIZE o PASSING 1-1/2" 100 ln 80-100 3��n 70-90 1�2n 55-80 35-60 #8 25-50 #30 12-30 #200 5-10 3. APPLICATION: A. Grading: Do any necessary grading in addition to that performed in accordance with Earthwork Section , to brir►g subgrades, after final compaction, to the required grades and sections for site improvement. B, Preparation of Subgrade: Remove spongy and otherwise unsuitable material and replace with stable material. C. Compaction of Subgrade: The first 6 inches below the subgrade shall be compacted to at least 95� of the maximum dry density as determined by the provisions of AASHO T-99.� Water shall be prevented from standing on the compacted subgrade. � D. Utility Structures: Check for correct elevation of all manhole covers, valve boxes and similar structures located within areas to be paved, and make, or have made, any necessary adjustments in such structures. E. Placing Concrete: 1. Subgrade: Place concrete only on a moist� compacted subgrade or base free from loose material. Place no concrete on a muddy or frozen subgrade. 2. Forms: All forms shall be free from warp, tight . enough to prevent leakage and substantial enough to maintain their shape and position without springing or settling, when concrete is placed. k'orms shall be clean and smooth immediately before concreting. 3. P�acing Concrete: Concrete shall be deposited so as to require,as little rehandling as practicable. When concrete is to be placed at an atmospheric temperature of 35 degrees F. or less, paragraph 702.10 of the Indiana State Highway Specifications, latest revision shall be followed. F. Concrete Walks and Exteri�or Steps: 1. Slopes: Provide 1/4 inch per foot cross slope. ' Make adjustments in slope� at walk intersections as necessary to provide proper drainage. 2. Dimensions: Walks and steps shall be one course construction and of widths and details shown on the drawings. 3. Finish: 5creed concrete and trowel with a steel � trowel to a hard dense surface after surface water has disappeared. Apply medium broom finish and scribe cot�trol joints at 5 foot spacing. Provide 1/2" expansion joints where sidewalks intersect, and at a maximum spacing of 48 feet between expansion joints. G. Concrete Curb and Gutter: l. Expansion Joints: ,�all be 1 inch thick premoulded at ends of all returns and at a maximum spacing of 100 feet. 2. Contraction JointG: Unless otherwise provided, contraction joints shall be sawed joints spaced 20 feet on center. 3. Finish: Tamp and screed concrete as soon as placed, and fill any honey combed places. Finish square corners to 1/4" radius and other corners to radii shown. , H. Curing Concrete: Except as otherwise specified, cure all concrete by one of the methods described in Section 501.17 of the Indiana State Highway Specifications, latest revisions. I. Bituminous Pavement: Hot asphalt concrete pavement shall be as specified in Section 403 of the Indiana State Highway Specifications, latest revis:ions. Paving will not .be permitted during unfavorable weather or when the temperature is 40 degrees F. and falling. J. Compacted Aggregate Subbase: The Chickness shown on the drawings is the �inimum thickness of the fully compacted subbase. Compaction shall be accomplished by rolling with a smooth wheeled roller weighing 8 to 10 tons. Compact to 90� compaction using Standard Testing Procedures. Along curbs, headers and walls and at all placed not accessible to the roller, the aggregate material shall be tamped with mechanical tampers or with approved hand tampers. � 0 N > W oc Y u W I � W � 0 m d z � U W z z � p o m 0 0 �� � a° Q � a� � � Q � �d O �� � < V Q� 2 ~� p� � i W Z OJ � Z� Z W � Z oc � a C Z _ �� � � �� •� � �Q � Z Z �� �'� � � . Z - � � � � W � Y Z � � � 4 = a � � � � Z � t.i � W z 3 � ua �� � � �� � g� � =lIEET 'S P+� OF '