qcs 2007 0202

QCS Section 2 Part 2 Building Demolition Page 1

2. BUILDING DEMOLITION...............................................................................2

2.1 GENERAL ......................................................................................................2

2.1.1 Scope 22.1.2 References 22.1.3 General Requirements 2

2.2 STANDARD DEMOLITION ............................................................................2

2.2.1 Method Statement 22.2.2 Execution 3

2.3 UTILITY SERVICES.......................................................................................4

2.3.1 Demolition Related Work 4

2.4 SPECIAL DEMOLITION.................................................................................4

2.4.1 Scope 42.4.2 Method Statement 52.4.3 General Requirements 5

2.5 SELECTIVE DEMOLITION ............................................................................5

2.5.1 Scope 52.5.2 Method Statement 52.5.3 General Requirements 5

2.6 TEMPORARY WORK ....................................................................................5

2.6.1 General Requirements 5


2. BUILDING DEMOLITION

2.1 GENERAL

2.1.1 Scope

1 This Part specifies procedures and requirements for demolition and removal of buildings,structures and related service utilities. The scope of demolition or renovation work isspecified for three categories of demolition:

(a) Standard Demolition - typical type demolition work (b) Special Demolition - demolition of partially collapsed or unsafe structures (c) Selective Demolition - demolition required for alteration or expansion type work

2 Related Parts and Sections are as follows:

This Section Part 1 General Part 3 Hazardous Materials

Section 1 General Section 3 Earthworks Related to Buildings Section 28 Landscaping

2.1.2 References

1 The following standards are referred to in this Part:

BS 5607 Safe use of explosives in the construction industry

2.1.3 General Requirements

1 Unless otherwise indicated in the Project Documentation or directed by the Engineer, theContractor is to complete the demolition and removal of buildings and structures togetherwith all foundations and retaining walls, piers, partitions and columns, and associated serviceutilities.

2 The demolition is to be carried out in a planned and safe sequence, generally in reverseorder of erection, reducing the shell of the building in small lifts.

3 The Contractor is responsible for the removal and disposal of all debris resulting fromdemolition work.

4 Upon hand over of the Site to the Contractor, the Contractor is to take over all responsibilityof the buildings to be demolished.

5 The Contractor is to inspect each building he is to remove and determine for himself thework involved and the equipment and the materials required for the specified demolitionwork.

2.2 STANDARD DEMOLITION

2.2.1 Method Statement

1 The Contractor is to prepare a method statement which shall detail all aspects proposeddemolition work and associated procedures before commencing any demolition work. Themethod statement shall be approved by the Engineer before any demolition workcommences. The Method Statement is to incorporate the requirements of Part 1 of thisSection .


2 The Contractor shall established whether any stressed components are present in thestructure. The Contractor shall include a complete statement of his proposed method ofdemolition of the such components in his method statement.

3 The Contractor shall establish whether any of the walls of the structure to be demolished areload bearing and shall establish whether cross walls are bonded into the abutting walls. TheContractor shall identify such walls in his method statement.

2.2.2 Execution

1 The Contractor shall completely demolish and remove buildings and structures, including allservices related or connected thereto, as noted below:

(a) to minimum depth of 900 mm below finished grade in areas new paving is to beplaced unless greater depth is required for installation of new utility service lines.

(b) to full depth within an area defined by hypothetical lines located 1.5 m outsidebuilding lines of new structures.

(c) to minimum depth of 600 mm below finished grade in all other areas unless greaterdepth is required for installation of new utility service lines.

2 Debris, including brick, concrete, stone, metals and similar materials are to become theproperty of contractor and be disposed of by him, off the Site. Concrete slabs below gradethat do not require removal from the site are to be broken up into pieces not exceeding 60cm2.

3 In removing buildings and structures of more than two stories, demolition work shall start atthe highest level and progressing down to third floor level. Demolition of first and secondstories may proceed simultaneously.

4 Where explosives are to be used, comply with Part 1 of this Section and BS 5607.

5 The Contractor is to conduct his operations in such a manner as to avoid danger to personsand property. Once demolition work has started on any building, the work on that building isto be continued to completion, promptly and expeditiously.

6 Where building basements exist and the area is not to be reused, all debris is to be removedfrom the basement areas and concrete floors broken. The areas are then to be filled withbackfill material simultaneously with the breaking of the foundation walls and floors so thatthe backfill material will be integrated with the pieces of broken concrete.

7 Concrete slabs resting on earth and forming footpaths, driveways, or the first floor ofbuildings without basements are to be broken up and removed from the Site unlessotherwise specified in the Project Documentation.

8 The Contractor is responsible for removing any additional small out buildings ormiscellaneous structures that have not been indicated in the Project Documentation unlessotherwise instructed by the Engineer.

9 Immediately upon award of the Contract and prior to the demolition of any structures, theContractor is required to paint or stencil in contrasting colours of an oil or lead-based paintBUILDING TO BE DEMOLISHED on all four sides of each residential building and on twoopposite sides of other structures in Arabic and English. The signs are to be positioned in aprominent location on the structure so that they can be easily seen and read, and at asufficient height to prevent defacing.


10 Existing underground storage tanks on the Site or within the buildings to be demolished areto be removed and disposed of by the Contractor. The Contractor is to take all necessaryprecautions during the removal of the fluid within the tanks. Where tanks are removed, theContractor is to backfill the resulting void with the fine aggregate. This backfill is to becompacted in accordance with Section 3, Earthworks Related to Buildings.

11 Structures designated to become the property of the Contractor are to be removed from theSite.

12 Operations necessary for the removal of an existing structure or obstruction, which maydamage new construction, are to be completed prior to placing the new work unlessotherwise specified in the Project Documentation.

13 Where trees have been designated to remain, but are a hindrance to demolition work, theContractor is to, at his own expense, temporarily relocate such trees and provide allmaintenance as necessary until such time as replanting is feasible.

2.3 UTILITY SERVICES

2.3.1 Demolition Related Work

1 The Contractor is to arrange for the disconnection of all utilities that serve buildings inaccordance with the respective requirements and regulations of the relevant authority.

2 The Contractor shall liase directly with the service utility authorities to assertion correctprocedures and safe working practices related to disconnection of each particular utilityservice.

3 The Contractor is to disconnect and properly seal, in a manner approved by the relevantauthority and the Engineer, all sewer outlets that serve buildings to be demolished. TheContractor will keep the Engineer informed of his plans for the performance of any work inconnection with the sealing off of such outlets in order that proper inspection may beprovided at the time the work is performed.

4 Demolition of utilities shall be in accordance with Part 1 and Clause 2.2 of this Sectionunless otherwise required by the Project Documentation.

5 The Contractor shall demolish and remove external utility service lines as follows:

(a) abandoned portions of utility lines located outside areas of new buildings, or newroads, footpaths and parking areas that are less than 650 mm below proposedfinished ground levels

(b) abandoned portions of utility lines which occur within areas of new buildings, roads,footpaths and parking areas

(c) abandoned utility lines that would interfere with installation of new utility lines (d) other abandoned lines not specified that interface with performance of the work of

this contract.

6 Unless otherwise stated elsewhere in the Project Documentation, the point of disconnectionof utility services shall be at a point agreed with by the utility owner.

2.4 SPECIAL DEMOLITION

2.4.1 Scope

1 This Clause specifies the requirements and precautions to be taken where demolition andremoval of materials is required within buildings or structures which are partially collapsed orconsidered unsafe.



1 The requirements as set forth by Clause 2.2 of this Section will apply unless stated otherwisein the Project Documentation.


1 Where demolition is to be done within partially collapsed or unsafe buildings, additional sitespecific investigations will need to be made by qualified engineers or specialists to determineif temporary shoring or other measures must be taken for safety of workers, the Public orother adjacent structures of properties. The Contractor is responsible for arranging for suchinvestigations to be made before any demolition work commences. The Contractor shallincorporate the findings and results of the investigation in his method statement. The cost ofany specific investigations, as described in this paragraph, shall be borne by the Contractorunless otherwise stated in the Project Documentation.

2.5 SELECTIVE DEMOLITION

2.5.1 Scope

1 This Clause specifies the requirements and precautions to be taken where only parts of theinterior or exterior of buildings are to be demolished, removed or replaced. This may includerenovation or remodelling work, additions or expansions.


1 The requirements as set forth by Clause 2.2 of this Section will apply unless stated otherwisein the Project Documentation.


1 Demolition work in alterations are to be undertaken with the maximum consideration for thesurrounding structure and are to be limited to the minimum required in order to carry out thework. The manner and order of the work, including the design and provision of any supportsand other safety precautions, will be the Contractors responsibility and shall be fully detailedin the method statement.

2 The design of any shoring and supports necessary to maintain the stability of any structureretained after the demolition of adjoining property are to be submitted to the Engineer forapproval. The responsibility for the sufficiency of the design is to rest with the Contractor,notwithstanding the approval of the Engineer.

2.6 TEMPORARY WORK


1 The Contractor is to provide temporary works for protection of existing roads, footpaths,utilities, and structures where and when necessary.

2 Support is to be provided for members of framed structures before cutting them.

3 Where a structures stability may be affected by the demolition of a member, temporarybracing, and guys, are to be provided to restrain the remaining members.

END OF PART

2. BUILDING DEMOLITION2.1 GENERAL2.1.1 Scope2.1.2 References2.1.3 General Requirements2.2 STANDARD DEMOLITION2.2.1 Method Statement2.2.2 Execution2.3 UTILITY SERVICES2.3.1 Demolition Related Work2.4 SPECIAL DEMOLITION2.4.1 Scope2.4.2 Method Statement2.4.3 General Requirements2.5 SELECTIVE DEMOLITION2.5.1 Scope2.5.2 Method Statement2.5.3 General Requirements2.6 TEMPORARY WORK2.6.1 General Requirements

qcs 2007 0202

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