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FOREWORD Construction of government infrastructure facilities of the highest quality has always been the primary mandate of the Department of Public Works and Highways (DPWH). Cognizant of the importance of providing effective standard specifications to be used in the implementation of projects that...

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FOREWORD

Construction of government infrastructure facilities of the highest quality has always been the primary mandate of the Department of Public Works and Highways (DPWH). Cognizant of the importance of providing effective standard specifications to be used in the implementation of projects that will produce sound, durable and economical structures, this Department has revised the 1995 edition of the DPWH Standard Specifications for Highways, Bridges and Airports (Volume II). The revision was made in response to some valid comments on the use of said specifications to suit the actual field conditions and in consonance with the policy direction of the Department to improve the quality of infrastructure projects. All previous amendments made as well as new specifications developed were considered and included in this 2004 edition, for the guidance and compliance of all concerned.

FLORANTE SORIQUEZ Acting Secretary

January 24, 2005

Department Order No. 24 Series of 2005

) ) ) ) SUBJECT :

DPWH Standard Specifications for Public Works and Highways, 2004 Edition: Volume II, Highways, Bridges and Airports.

It is hereby directed that henceforth, the DPWH Standard Specifications for Public Works and Highways 2004 Edition: Volume II – Highways, Bridges and Airports shall be adopted in the implementation of all infrastructure projects of said categories; except for projects which have already been advertised for bids and for which specifications other than the above standards have been adopted. Where necessary, these Standard Specifications shall be supplemented by special provisions. For strict compliance. All previous issuances contrary with this Order are hereby revoked.

SGD FLORANTE SORIQUEZ Acting Secretary

VOLUME II STANDARD SPECIFICATIONS FOR HIGHWAYS, BRIDGES AND AIRPORTS TABLE OF CONTENTS PAGE PART A-

FACILITIES FOR THE ENGINEER

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1

PART B-

OTHER GENERAL REQUIREMENTS

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5

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6

PART C- EARTHWORK Item 100Item 101Item 102Item 103Item 104Item 105Item 106Item 107-

Clearing and Grubbing Removal of Structures and Obstructions Excavation Structure Excavation Embankment Subgrade Preparation Compaction Equipment and Density Control Strips Overhaul

PART D- SUBBASE AND BASE COURSE Item 200Item 201Item 202Item 203Item 204Item 205Item 206Item 207PART E-

Item 306Item 307-

6 9 12 18 24 31 34

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36

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38

Aggregate Subbase Course Aggregate Base Course Crushed Aggregate Base Course Lime Stabilized Road Mix Base Course Portland Cement Stabilized Road Mix Base Course Asphalt Stabilized Road Mix Base Course Portland Cement Treated Plant Mix Base Course Aggregate Stockpile

SURFACE COURSES

Item 300Item 301Item 302Item 303Item 304Item 305-

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38 41 44 46 51

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53

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54

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57

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59

Aggregate Surface Course Bituminous Prime Coat Bituminous Tack Coat Bituminous Seal Coat Bituminous Surface Treatment Bituminous Penetration Macadam Pavement Bituminous Road Mix Surface Course Bituminous Plant-Mix Surface CourseGeneral

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59 61 63 65 68 73

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78 83

Item 308Item 309Item 310Item 311PART F-

BRIDGE CONSTRUCTION

Item 400Item 401Item 402Item 403Item 404Item 405Item 406Item 407Item 408Item 409Item 410Item 411Item 412Item 413-

PART G-

Cold Asphalt Plant-Mix Bituminous Plant-Mix (Stockpile Maintenance Mixture) Bituminous Concrete Surface Course, Hot Laid Portland Cement Concrete Pavement

Item 505Item 506Item 507Item 508Item 509Item 510Item 511-

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102

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104

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134

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134 160 164 169 207 210 220 230 250 255 267 269 276 281

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282

Pipe Culverts and Storm Drains Underdrains Manholes, Inlets and Catch Basins Drainage Steel Grating with Frame Cleaning and Reconditioning Existing Drainage Structures Riprap and Grouted Riprap Stone Masonry Rubble Concrete Hand-Laid Rock Embankment Sheet Piles Concrete Slope Protection Gabions and Mattresses

PART H- MISCELLANEOUS STRUCTURES Item 600Item 601Item 602-

95 100

Piling Railings Timber Structures Metal Structures Reinforcing Steel Structural Concrete Prestressed Concrete Structures Concrete Structures Steel Bridges Welded Structural Steel Treated and Untreated Timber Paint Elastomeric Bearing Pads Pre Molded Joint Filler for Concrete Paving and Structural Construction

DRAINAGE AND SLOPE PROTECTION STRUCTURES Item 500Item 501Item 502Item 503Item 504-

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--------------- 282 --------------- 288 --------------- 291 --------------- 294 --------------- 298 ---------------------------------------------------------------------------------------------------

300 304 308 310 312 313 315

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322

Curb and/or Gutter Sidewalk Monuments, Markers and Guide Posts

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322 326 329

Item 603Item 604Item 605Item 606Item 607Item 608Item 609Item 610Item 611Item 612-

PART I-

Guardrail Fencing Road Sign Pavement Markings Reflective Pavement Studs Topsoil Sprigging Sodding Tree Planting Reflective Thermoplastic Stripping Material (Solid Form)

MATERIALS DETAILS

Item 700Item 701Item 702Item 703Item 703AItem 704Item 705Item 706Item 707Item 708Item 709Item 710Item 711Item 712Item 713Item 714Item 715-

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330 334 336 340 344 347 348 352 355 362

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367

Hydraulic Cement Construction Lime (Hydrated) Bituminous Materials Aggregates Mineral Filler Masonry Units Joint Materials Concrete Clay, Plastic and Fiber Pipe Metal Pipe Chemical Admixtures For Concrete Paints Reinforcing Steel and Wire Rope Fence and Guardrail Structural Metal Treated and Untreated Timber Water Geotextiles

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367 367 370 376 385 387 387 392 394 397 401 404 406 408 415 416 417

PART A FACILITIES FOR THE ENGINEER A.1

REQUIREMENTS

A.1.1 Offices and Laboratories for the Engineer 1. The Contractor shall provide and maintain field offices and testing laboratories, including all the necessary electricity, water, drainage and telephone services for the use of the Engineer and his staff. The offices and laboratories shall have at least the floor area prescribed on the Plans and shall contain the equipment, supplies and furnishings specified in the Contract. Testing equipment supplied in accordance with the Special Provisions shall be located in testing laboratories as required by the Engineer. All offices and laboratories shall be ready for occupancy and use by the Engineer within two (2) months of the commencement of the Works. Their location and final plan shall require the approval of the Engineer prior to the start of construction. It is the intent of this Specification to locate the field offices and laboratories in government owned lots so that the use by the government of these facilities can be maximized even after the completion of the project. However, if no government lot is available, and these structures are to be erected on private property, it is the responsibility of the Contractor to make the necessary arrangements with the landowner(s) regarding the use of the lot for the Engineer’s office and laboratories and to remove and/or transfer, if so required under the Contract, the improvements thereon, including all appurtenances upon completion of the Works. All facilities provided by the Contractor shall be near the job site, where necessary and shall conform to the best standard for the required types. On completion of the Contract, the facilities provided by the Contractor including utilities and communication facilities shall revert to the Government including office equipment, apparatus, pieces of furniture, laboratory equipment, etc, unless otherwise specified in the Contract documents. The Contractor shall be responsible for raising the ground (if necessary), grading and drainage in the vicinity of each facility with suitable access walkways, seeding and sodding of the ground around as directed and approved by the Engineer. Also, the Contractor shall construct a parking area for the compound near the buildings and a satisfactory access road to the parking areas.

1

The Contractor shall be responsible for the maintenance and protection of all facilities to be provided during the duration of the Contract, including providing adequate stock of all expendable items, such as light bulbs, light tubes, laboratory equipment and supplies at all times to ensure proper and continuous functioning of all the Engineer’s facilities. The whole area of the Engineer’s compound shall be fenced with barbed wire (or equivalent) with necessary gates as directed by the Engineer. The Contractor shall provide suitable utilities and services, such as potable water, electricity, sewerage and security on a 24-hour basis. 2. The Contractor shall provided qualified and experienced laboratory staff to carry out all the materials quality control and all the tests specified in the Contract and required by the Engineer. The person so appointed by the Contractor to mange the laboratory shall be well experienced in the type of work to be undertaken and shall be subject to the approval of the Engineer. He shall work full time and shall be responsible to the Engineer for all works carried out. 3. The telephone service, if required in the Contract shall have a separate connection direct to the telephone company’s telephone exchange simgle line for the exclusive use of the Engineer and his staff. 4. The Contractor shall provide, if required in the Contract, a two-way radio communication service. 5. Any portable offices required in the Contract shall be dismantled, moved and erected from time to time as directed by the Engineer. 6. All offices, stores and testing laboratories shall be proficiently guarded at all times of the day and night, regularly and properly cleaned, adequately supplied and maintained for the duration of the Contract. A.1.2 Vehicles for the Engineer The Contractor shall provide within thirty (30) calendar days after notice to commence work, the vehicles listed in the Special Provisions for the exclusive use of the Engineer. The vehicles to be provided by the Contractor shall be to the satisfaction of the Engineer. All vehicles shall comply in all respects with all relevant Philippine national or local laws statutes and regulations. All vehicles shall carry or be fitted with the accessories as may be prescribed by laws and have comprehensive insurance. The vehicles on delivery shall be new and shall be driven by a competent qualified and experienced driver who shall be under the direct order of the Engineer.

2

The contractor shall maintain the vehicle in first class condition and shall be supplied with appropriate fuel and lubricants al all times He shall provide equivalent substitute vehicles during any period when the specified vehicles are taken out of service for maintenance, repair or any other reason. Unless otherwise specified, the vehicle shall at the end of the Contract become the property of the Government. A.1.3 Assistance to the Engineer The Contractor shall at all times during the duration of the Contract provide for the use of the Engineer all equipment, instruments and apparatus, all information and records and qualified chainmen and laborers required by the Engineer for inspecting and measuring the Works. Such equipment, instruments and apparatus shall include those listed in the Special Provisions. A.1.4 Photographs The Contractor shall provide record photographs taken as, when and where directed by the Engineer at intervals of not more than one month. The photographs shall be sufficient in number and location to record the exact progress of the Works. The Contractor shall provide one proof print of each photograph taken, and the negative and ten copies, not less than 254 mm x 203 mm and printed on glossy paper, of any of the photographs by the Engineer. The photographs retained by the Engineer will become the property of the Government and the Contractor shall supply approved albums to accommodate them. Two copies are to be signed by the Contractor, one of which will be signed by the Engineer and returned to the Contractor. A.2 MEASUREMENT AND PAYMENT A.2.1 Measurement 1. Lump-sum items shall be provided for the provision of: - Office building for the Engineer including pieces of furnitures, appliances and equipment. - Laboratory building for the Engineer including furnitures, appliances and equipment. - Survey equipment for the Engineer. 2. The quantities for the maintenance of the office and the laboratory for the Engineer shall be for the time the Engineer occupies the office and the laboratory respectively. The unit of the measure is “month”. 3. No separate payment shall be made in respect of consumable materials as this is deemed to be included in the pay item for maintenance of the Engineer’s facilities.

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4. The quantities for the provision of vehicles for the Engineer shall be the number of each type of vehicle supplied. The unit of measure is “each”. 5. The quantities for the operation of vehicle for the Engineer shall be for the time the Engineer is supplied with each vehicle prior to their finally becoming the property of the Government. The unit of measure is “month”. 6. The quantities for progress photographs shall be the number of photographs selected and provided as progress photographs. The unit of measure is ‘each”. A.2..2 Payment The quantities determined as provided above shall be paid for at the appropriate contract unit price, for each of the particular pay items shown in the Bill of Quantities which price and payment shall constitute full compensation for furnishing and maintaining such items.

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PART B OTHER GENERAL REQUIREMENTS B.1 OFFICES, SHOPS, STORES AND WORKMENS ACCOMMODATION FOR CONTRACTOR The contractor shall provide and maintain such offices, stores, workshops latrines, housing and messing accommodations as are necessary. These should be located in the Contractor’s compound, distinct and separate from the Engineer’s compound. The location, dimensions and layout of such buildings and places shall be subject to the approval of the Engineer. The Contractor shall not be permitted to erect temporary buildings or structures on the site without the specific permission in writing of the Engineer including approval of the dimensions of such buildings or structures. Before the commencement of the period of Warranty, the Contractor shall fence of the Contractor’s store area from the rest of the Site. By the end of the Period of Warranty, the Contractor shall remove this fence and all buildings shall be cleared and the area shall be graded as required by the Engineer. B.2 MEDICAL ROOM AND FIRST AID FACILITIES 1. The Contractor shall provide and maintain throughout the duration of the Contract, a medical room together with all necessary supplies to be sited in the Contractor’s main area. The medical room shall be waterproof; it could be a building or room designated and used exclusively for the purpose and have a floor area of at least 15 square meters and a glazed window area of at least 2 square meters. 2. The Contractor shall employ permanently on the site a fully trained Medical Aide who shall be engaged solely from medical duties. 3. The location of the medical room and any other arrangements shall be made known to all employees by posting on prominent locations suitable notices in the Site. 4. The Contractor’s arrangement to comply with this Section shall be subject to the approval of the Engineer and also to the approval of any qualified Medical Officer designated by the Government to supervise medical arrangements on the Site. B.3 MEASUREMENT AND PAYMENT Work prescribed in Section B.2 shall not be measured and paid separately, same shall be deemed to be included in pay items for other items for work.

5

PART C – EARTHWORK ITEM 100 – CLEARING AND GRUBBING 100.1 Description This item shall consist of clearing, grubbing, removing and disposing all vegetation and debris as designated in the Contract, except those objects that are designated to remain in place or are to be removed in consonance with other provisions of this Specification. The work shall also include the preservation from injury or defacement of all objects designated to remain. 100.2 Construction Requirements 100.2.1

General

The Engineer will establish the limits of work and designate all trees, shrubs, plants and other things to remain. The Contractor shall preserve all objects designated to remain. Paint required for cut or scarred surface of trees or shrubs selected for retention shall be an approved asphaltum base paint prepared especially for tree surgery. Clearing shall extend one (1) meter beyond the toe of the fill slopes or beyond rounding of cut slopes as the case maybe for the entire length of the project unless otherwise shown on the plans or as directed by the Engineer and provided it is within the right of way limits of the project, with the exception of trees under the jurisdiction of the Forest Management Bureau (FMB). 100.2.2

Clearing and Grubbing

All surface objects and all trees, stumps, roots and other protruding obstructions, not designated to remain, shall be cleared and/or grubbed, including mowing as required, except as provided below: (1)

Removal of undisturbed stumps and roots and nonperishable solid objects with a minimum depth of one (1) meter below subgrade or slope of embankment will not be required.

(2) In areas outside of the grading limits of cut and embankment areas, stumps and nonperishable solid objects shall be cut off not more than 150 mm (6 inches) above the ground line or low water level. (3)

In areas to be rounded at the top of cut slopes, stumps shall be cut off flush with or below the surface of the final slope line.

(4)

Grubbing of pits, channel changes and ditches will be required only to the depth necessitated by the proposed excavation within such areas.

(5) In areas covered by cogon/talahib, wild grass and other vegetations, top soil shall be cut to a maximum depth of 150 mm below the original ground surface or as

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designated by the Engineer, and disposed outside the clearing a...