02-Series 2000 Site Clearance

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Standard Technical Specification - 2002 Series 2000: Site Clearance

Table of Content

Ethiopian Roads Authority Page 2000-1

SERIES 2000: SITE CLEARANCE

TABLE OF CONTENT

DIVISION 2100: CLEARING AND GRUBBING.............................................................................2

2101 Scope ................................................................................................................................2

2102 Description of Work .........................................................................................................2

2103 Execution of Work............................................................................................................3

2104 Measurement and Payment...............................................................................................4Item 21.01 Clearing and grubbing ...................................................................................4

Item 21.02 Removal and grabbing of large trees and tree stumps...................................4

Item 21.03 Reclearing of surfaces ...................................................................................4

Item 21.04 Removal and storage of selected vegetation: ................................................4

DIVISION 2200: DEMOLITION, REMOVAL, DISPOSAL OR STORAGE OF EXISTING

STRUCTURES AND INSTALLATIONS........................................................................................... 5

2201 Scope ................................................................................................................................5

2202 Construction Requirements for Demolition and Removal of Existing Structures ...........5

2203 Construction Requirements for Demolition And Removal of Existing RoadPavements.........................................................................................................................5

2204 Construction Requirements for Existing Public Utilities .................................................6

2205 Measurement and Payment...............................................................................................6

Item 22.01 Clearing and grubbing at inlets and outlets of hydraulic structures ..............6

Item 22.02 Cleaning out of hydraulic structures..............................................................6

Item 22.03 Take up or down and set aside for reuse or remove to store off Site ............6


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Series 2000: Site Clearance Standard Technical Specification -2002

Division 2100: Clearing And Grubbing

Page2000-2 Ethiopian Roads Authority

DIVISION 2100: CLEARING AND GRUBBING

2101 SCOPE

This Division covers the clearing of the Site and grubbing necessary for the construction of

the Works covered by the Contract, in accordance with these Specifications, and the

removal and disposal of materials resulting from clearing and grubbing. This work shall

also include the preservation from injury or defacement of all vegetation and objects

designated to remain.

2102 DESCRIPTION OF WORK

(a) Clearing

Clearing shall consist of the removal of all trees, brush, other vegetation, rubbish, fences

and all other objectionable material including the disposal of all material resulting from theclearing and grubbing.

It shall also include the removal and disposal of structures that obtrude, encroach upon or

otherwise obstruct the work and which can be cleared by means of a bulldozer of

approximately 22 tons mass and flywheel power of approximatel 270kW.

The moving of a certain amount of soil or gravel material may be inherent to or

unavoidable during the process of clearing and no extra payment will be made for this.

Clearing shall include the removal of all rocks and boulders of up to 0.15 cu.m. in size

which are exposed or lying on the surface.

Where fences have to be taken down and the material sorted, coiled and stacked, payment

for this work shall be made under series 9000.

(b) Grubbing

Where directed by the Engineer, all stumps and roots larger than 75mm in diameter shall

be removed to a depth of not less than 600 mm below the finished road level and a

minimum of 75 mm below original ground level. Where the existing ground has to be

compacted, all stumps and roots including matted roots shall be removed to a depth of at

least 200 mm below the cleared surface, except where otherwise specified or directed by

the Engineer.

Except at borrow areas the cavities resulting from the grubbing shall be backfilled withapproved material and compacted to a density not less than the density of the surrounding

ground.

(c) Conservation of topsoil

Where suitable topsoil exists within the limits of the area to be cleared and/or grubbed, the

Contractor shall, if ordered by the Engineer, remove the topsoil together with any grass and

other suitable vegetation. If not used immediately, the topsoil shall be transported and

deposited in stockpiles for later use. The Contractor will not be required to remove topsoil

to an average depth of less than 150 mm from any particular area.


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This work shall be measured and paid for under Division 9600, payitem 96.01. Where

topsoil can be removed without the necessity of first performing clearing and grubbing, no

payment will be made for clearing and grubbing under this Division.

(d) Conservation of vegetation

Where provided for in the project specification, certain designated plants encountered in

the road reserve and borrow areas shall be carefully protected by the Contractor.

2103 EXECUTION OF WORK

(a) Areas to be cleared and/or grubbed.

The portions of the road reserve that fall within the limits of the road prism as well as

certain borrow areas may require to be cleared and/or grubbed. The Engineer shall

designate the areas to be cleared and such areas shall not necessarily be limited to those

mentioned above.

The Contractor shall note that in order to avoid reclearing, the clearing and/or grubbing

may have to be done immediately before subsequent construction activities.

Individual trees designated in writing by the Engineer shall be left standing and uninjured.

A penalty equal to the amount specified in the project specifications shall be imposed for

every such tree, which is unnecessarily removed or damaged.

(b) Cutting of trees

The Contractor shall take the necessary precautions to prevent damage to structures and

other private or public property. If necessary trees shall be cut in sections from the topdownwards. The branches of trees to be left standing shall be trimmed so as not to intrude

into the space for up to 7 m in height above the roadway.

(c) Disposal of material

Material obtained from clearing and/or grubbing shall be disposed of, as indicated by the

Engineer, in borrow pits or other suitable places and covered up with soil or gravel. The

burning of combustible material will normally be permitted but may only be done with the

prior written approval of the Engineer. Care must be taken to observe any regulations

concerning pollution of the air.

All tree trunks and branches in excess of 150 mm in diameter shall be cleaned of secondarybranches, sawn into suitable lengths and stacked at sites indicated by the Engineer. Such

timber shall not be used by the Contractor for any purpose and shall remain the property of

the Employer unless otherwise agreed with the Engineer.

Fencing wire shall be neatly wound into reels and all such wire, together with all fence

posts and other usable material from structures, etc., shall be stacked at sites indicated by

the Engineer.


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2104 MEASUREMENT AND PAYMENT

Item 21.01 Clearing and grubbing..........................................................................hectare

The unit of measurement for clearing and grubbing is the hectare. The quantity shall be

taken as the area in hectares (to the nearest 0.1 ha) designated by the Engineer and cleared

and grubbed in accordance with these Specifications. The area occupied by the existing

road prism will be included.

The tendered rate shall include full compensation for all work necessary for the clearing of

the surface, the removal and grubbing of trees and tree stumps, cutting of branches,

backfilling of cavities, demolishing and disposal of structures and the removal,

transporting and disposal of material all as specified in this Division.

Item 21.02 Removal and grabbing of large trees and tree stumps

(a) Girth exceeding 1 m up to and including 2 m........................................number (No)

(b) Girth exceeding 2 m up to and including 3 m........................................number (No)(c) Etc. in steps of 1 m girth.

The girth of trees or stumps shall be measured at the narrowest point of the tree or stump in

the first meter of its height above ground level. Trees and stumps with a girth exceeding 1

m shall be measured individually and classified according to size in increments of 1 m as

indicated above.

Item 21.03 Reclearing of surfaces (on the written instructions of the engineer only) ..

........................................................................................................ hectare (ha)

The unit of measurement for reclearing areas which have previously been cleared shall be

the hectare. The quantity shall be measured to the nearest 0.1 ha.

Item 21.04 Removal and storage of selected vegetation:

(a) Cost of removal, storing, protection and replanting in a protected and fenced-off

area of selected vegetation ..............................................................................provisional sum

(b) Charge on provisional sum ............................................................... percentage (%)


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Division 2200: Demolition, Removal, Disposal Or Storage Of Existing Structures And Installations


DIVISION 2200: DEMOLITION, REMOVAL, DISPOSAL OR STORAGE

OF EXISTING STRUCTURES AND INSTALLATIONS

2201 SCOPE

This Division covers the demolition, disconnection, removal or part removal, disposal and

or storage of buildings, bridges, drainage structures, retaining walls, wells, buildings,

service ducts, foundations, fencing, walls, kerbs, old pavements, abandoned pipelines,

disused public utilities and any other obstructions which are not designated or permitted to

remain, except for the obstructions to be removed and disposed of under other items in the

contract.

2202 CONSTRUCTION REQUIREMENTS FOR DEMOLITION AND REMOVAL

OF EXISTING STRUCTURES

Existing structures and installations shall be demolished as described in the Contract or asinstructed by the Engineer. The existing structures and installations shall be removed in

such a way as to leave no obstructions to the new Works. Those structures and

installations, which are to be partially demolished, shall be shored, braced and supported in

such a manner that the integrity of the structure shall be maintained. All supports shall be

kept outside the right of way.

The Contractor shall carefully remove and store materials salvaged from demolished

structures and installations. Unless otherwise stated in the Contract, such materials shall

become the property of the owner. This material shall be carefully transported and stored in

an acceptable manner upon the owner's adjacent property or at a location to be identified

by the Engineer.(i) Whenever materials are stored within the right-of-way, the Contractor shall be

responsible for its care and preservation until its authorised removal. The Contractor shall

satisfactorily dispose of all material designated by the Engineer as having no salvage value

in accordance with the requirements of Division 1600.

The Contractor shall remove structures and installations or part of structure and

installations, which obstruct with the installation of a new structure or installation.

(ii) Unless otherwise directed by the Engineer any voids below ground level in existing

structures or installations shall be filled with natural sand or crushed fine aggregate.

Latrine pits, septic tanks etc. shall be cleaned out and disinfected and the contents disposed

of in accordance with the requirements of Division 1600 before the filling with approved

material.

2203 CONSTRUCTION REQUIREMENTS FOR DEMOLITION AND REMOVAL

OF EXISTING ROAD PAVEMENTS

(a) Method and Equipment

Existing road pavements shall be demolished by excavation, scarifying or milling using

appropriate equipment approved by the Engineer.


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(b) Disposal or Storage of Materials

Material resulting from the demolition of existing road pavements shall be disposed of or

stored as instructed by the Engineer.

2204 CONSTRUCTION REQUIREMENTS FOR EXISTING PUBLIC UTILITIES

(a) Disconnections

Before the commencement of demolition operations, the Contractor shall notify the

Engineer who shall arrange for the disconnection of all disused public utilities, including

electricity, telephone, sewer, water and other facilities encountered.

(b) Protection of Existing Public Utilities

Existing utilities, which are to remain in place, such as sewers, drains, water pipes,

conduits, poles, etc. are to be carefully protected from injury and are not to be displaced.

(c) Relocation of Existing Public Utilities

The Contracting Authority shall arrange with the appropriate authorities for the necessary

relocation of any public utilities, which would otherwise obstruct the Works. The

Contractor shall comply with the requirements of Clause 1207.

2205 MEASUREMENT AND PAYMENT

Item 22.01 Clearing and grubbing at inlets and outlets of hydraulic structures ...........

...............................................................................................square meter (m2

)The unit of measurement for clearing and grubbing at inlets and outlets of hydraulic

structures is in square meter (m2) measured within the limits of the areas designated by the

Engineer, which are cleared and grubbed in accordance with these Specifications.

Item 22.02 Cleaning out of hydraulic structures

(a) Pipes with an internal diameter up to and including 750 mm .........cubic meter (m3)

(b) Pipes with an internal diameter exceeding 750 mm ........................cubic meter (m3)

(c) Box culverts up to and including 1.5 m vertical dimension ........... cubic meter (m3)

(d) Box culverts exceeding 1.5 m vertical dimension ......................... cubic meter (m3)

The unit of measurement shall be the cubic meter (m3) of material removed from hydraulic

structures where instructed by the Engineer so that the structures are cleaned as specified.

Payment under this item will normally only be made once during the duration of the

contract.

Item 22.03 Take up or down and set aside for reuse or remove to store off Site the

following

(i) Blockwork and stone work .............................................................cubic meter (m3)


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(ii) Paved areas and the like, brickwork............................................. square meter (m2)

(iii) kerbs, channels, edgings, combined drainage and curb blocks, fencing, safety

fences and the like, copings, string courses and the like .............................linear meter (lm)

(iv) Cable............................................................................................... linear meter (lm)

(v) Road lighting columns, brackets and wall mountings, traffic signs, reflectingroad studs, gates, stiles, street furniture, communications cabinets, posts, brackets, signal

indicators, shelves, racking, frames, electronic units and the like............................... number

(vi) Chamber covers and frames, gully gratings and frames and the like.............number

(vii) Individual blocks, features or stones ............................................................ number

The measurement for take up or down and set aside for reuse or remove to store off Site

blockwork, stonework, paved areas and the like, brickwork, kerbs, channels, edgings,

combined drainage and kerb blocks, fencing, safety fences and the like, copings, string

courses and the like, cable, road lighting columns, brackets and wall mountings, trafficsigns, reflecting road studs, gates, stiles, street furniture and the like; communications

cabinets, posts, brackets, signal indicators, shelves, racking, frames, electronic units and

the like; chamber covers and frames, gully, gratings and frames and the like; individual

blocks, features or stones shall be the volumes, areas, lengths or numbers stated in the

Contract.

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