STANDARD SPECIFICATIONS

2004

VOLUME 1HIGHWAYS, BRIDGES & AIRPORT

DPWH

REPUBLIC OF THE PHILIPPINESDEPARTMENT OF PUBLIC WORKS AND HIGHWAYS

OFFICE OF THE SECRETARYBONIFACIO DRIVE, PORT AREA

MANILA

STANDARD SPECIFICATIONSFOR

PUBLIC WORKS AND HIGHWAYS

VOLUME II

STANDARD SPECIFICATIONSFOR HIGHWAYS, BRIDGES AND AIRPORTS

REPUBLIC OF THE PHILIPPINESDEPARTMENT OF PUBLIC WORKS AND HIGHWAYS

OFFICE OF THE SECRETARYBONIFACIO DRIVE, PORT AREA

MANILA

STANDARD SPECIFICATIONSFOR

PUBLIC WORKS AND HIGHWAYS( IN THREE VOLUMES )

2004

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

VOLUME II

STANDARD SPECIFICATIONS FOR HIGHWAYS, BRIDGES AND AIRPORTS

TABLE OF CONTENTS

PAGE

PART A- FACILITIES FOR THE ENGINEER --------------------------- 1

PART B- OTHER GENERAL REQUIREMENTS --------------------------- 5

PART C- EARTHWORK --------------------------- 6

Item 100- Clearing and Grubbing --------------- 6Item 101- Removal of Structures and Obstructions --------------- 9Item 102- Excavation --------------- 12Item 103- Structure Excavation --------------- 18Item 104- Embankment --------------- 24Item 105- Subgrade Preparation --------------- 31Item 106- Compaction Equipment and Density

Control Strips--------------- 34

Item 107- Overhaul --------------- 36

PART D- SUBBASE AND BASE COURSE --------------------------- 38

Item 200- Aggregate Subbase Course --------------- 38Item 201- Aggregate Base Course --------------- 41Item 202- Crushed Aggregate Base Course --------------- 44Item 203- Lime Stabilized Road Mix Base Course --------------- 46Item 204- Portland Cement Stabilized Road Mix

Base Course--------------- 51

Item 205- Asphalt Stabilized Road Mix Base Course

--------------- 53

Item 206- Portland Cement Treated Plant Mix Base Course

--------------- 54

Item 207- Aggregate Stockpile --------------- 57

PART E- SURFACE COURSES --------------------------- 59

Item 300- Aggregate Surface Course --------------- 59Item 301- Bituminous Prime Coat --------------- 61Item 302- Bituminous Tack Coat --------------- 63Item 303- Bituminous Seal Coat --------------- 65Item 304- Bituminous Surface Treatment --------------- 68Item 305- Bituminous Penetration Macadam --------------- 73

PavementItem 306- Bituminous Road Mix Surface Course --------------- 78Item 307- Bituminous Plant-Mix Surface Course-

General--------------- 83

Item 308- Cold Asphalt Plant-Mix --------------- 95Item 309- Bituminous Plant-Mix (Stockpile

Maintenance Mixture)--------------- 100

Item 310- Bituminous Concrete Surface Course, Hot Laid

--------------- 102

Item 311- Portland Cement Concrete Pavement --------------- 104

PART F- BRIDGE CONSTRUCTION --------------------------- 134

Item 400- Piling --------------- 134Item 401- Railings --------------- 160Item 402- Timber Structures --------------- 164Item 403- Metal Structures --------------- 169Item 404- Reinforcing Steel --------------- 207Item 405- Structural Concrete --------------- 210Item 406- Prestressed Concrete Structures --------------- 220Item 407- Concrete Structures --------------- 230Item 408- Steel Bridges --------------- 250Item 409- Welded Structural Steel --------------- 255Item 410- Treated and Untreated Timber --------------- 267Item 411- Paint --------------- 269Item 412- Elastomeric Bearing Pads --------------- 276Item 413- Pre Molded Joint Filler for Concrete

Paving and Structural Construction--------------- 281

PART G-

DRAINAGE AND SLOPE PROTECTION STRUCTURES

--------------------------- 282

Item 500- Pipe Culverts and Storm Drains --------------- 282Item 501- Underdrains --------------- 288Item 502- Manholes, Inlets and Catch Basins --------------- 291Item 503- Drainage Steel Grating with Frame --------------- 294Item 504- Cleaning and Reconditioning Existing

Drainage Structures--------------- 298

Item 505- Riprap and Grouted Riprap --------------- 300Item 506- Stone Masonry --------------- 304Item 507- Rubble Concrete --------------- 308Item 508- Hand-Laid Rock Embankment --------------- 310Item 509- Sheet Piles --------------- 312Item 510- Concrete Slope Protection --------------- 313Item 511- Gabions and Mattresses --------------- 315

PART H- MISCELLANEOUS STRUCTURES --------------------------- 322

Item 600- Curb and/or Gutter --------------- 322Item 601- Sidewalk --------------- 326Item 602- Monuments, Markers and Guide Posts --------------- 329Item 603- Guardrail --------------- 330Item 604- Fencing --------------- 334Item 605- Road Sign --------------- 336Item 606- Pavement Markings --------------- 340Item 607- Reflective Pavement Studs --------------- 344Item 608- Topsoil --------------- 347Item 609- Sprigging --------------- 348Item 610- Sodding --------------- 352Item 611- Tree Planting --------------- 355Item 612- Reflective Thermoplastic Stripping

Material (Solid Form)--------------- 362

PART I- MATERIALS DETAILS --------------------------- 367

Item 700- Hydraulic Cement --------------- 367Item 701- Construction Lime (Hydrated) --------------- 367Item 702- Bituminous Materials --------------- 370Item 703- Aggregates --------------- 376Item 703A- Mineral Filler --------------- 385Item 704- Masonry Units --------------- 387Item 705- Joint Materials --------------- 387Item 706- Concrete Clay, Plastic and Fiber Pipe --------------- 392Item 707- Metal Pipe --------------- 394Item 708- Chemical Admixtures For Concrete --------------- 397Item 709- Paints --------------- 401Item 710- Reinforcing Steel and Wire Rope --------------- 404Item 711- Fence and Guardrail --------------- 406Item 712- Structural Metal --------------- 408Item 713- Treated and Untreated Timber --------------- 415Item 714- Water --------------- 416Item 715- Geotextiles --------------- 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.

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.

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.

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.

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.