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Section 02 - Part 1 - General.pdf

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QCS 2010 Section 2 Part 1 General Page 1 1.  GENERAL...................................................................................................................2  1.1  INTRODUCTION .......................................................................................................2  1.1.1  Scope
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  i  I  MP E R I  A L T R A D I  N  G &  C  ON T R A  C T I  N  G C  O.W.L .L  (  I  T  C  C  )   QCS 2010 Section 2 Part 1 General Page 1 QCS 2010   1.   GENERAL ...................................................................................................................2   1.1   INTRODUCTION .......................................................................................................2   1.1.1   Scope  2   1.1.2   References  2   1.1.3   Definitions  2   1.2   RECORDS ..................................................................................................................2   1.2.1   Documentation  2   1.3   MATERIALS ARISING ..............................................................................................3   1.3.1   General Requirement  3   1.4   SAFETY ......................................................................................................................3   1.4.1   Safety Requirements  3   1.5   USE OF EXPLOSIVE ...............................................................................................4   1.5.1   General Description  4   1.5.2   Procedures  4   1.6   SPECIAL INVESTIGATIONS ..................................................................................4   1.6.1   General Description  4    i  I  MP E R I  A L T R A D I  N  G &  C  ON T R A  C T I  N  G C  O.W.L .L  (  I  T  C  C  )   QCS 2010 Section 2 Part 1 General Page 2 QCS 2010   1. GENERAL 1.1 INTRODUCTION 1.1.1 Scope 1 This Section specifies the requirements for demolition work, disposal of materials arising from demolition work, and procedures for dealing with hazardous materials encountered during demolition work. 2 Related Sections are as follows: Section 1 General Section 6 Roadworks Section 12 Earthworks Related to Buildings Section 28 Landscaping 1.1.2 References 1 The following standards are referred to in this Section: BS 5607 Safe use of explosives in the construction industry BS 6657 Guide to prevention of inadvertent initiation of electro-explosive devices by radio-frequency radiation. 1.1.3 Definitions 1 Demolition Work done to dismantle or take apart and remove an existing building or facility. 2 Hazardous Materials General term to encompass any and all materials which have been contaminated by substances which are dangerous or potentially dangerous to the public. It is inclusive of materials which if not properly contained could continue to spread and contaminate soil, ground water or become airborne. 3 Materials Arising Any parts or portions of building materials or accessories which are removed or salvaged once the demolition process begins. 4 Method Statement The defined method or process to be followed for demolition of a specific project. 5 Selective Demolition Typically refers to demolition work done to only parts of buildings or facilities for retrofit for renovation type work. 6 Unsafe, unstable In reference to this Section, this is interpreted to mean a building or structure or condition which is dangerous to the safety of the public. 1.2 RECORDS 1.2.1 Documentation 1 All available plans of the structure to be demolished are to be examined and where the nature of the construction is uncertain a special investigation is to be carried out as agreed with the Engineer. 2 Adjacent buildings or structures will be inspected and their existing interior and exterior condition shall be documented prior to and after demolition in writing or photographs or both.  i  I  MP E R I  A L T R A D I  N  G &  C  ON T R A  C T I  N  G C  O.W.L .L  (  I  T  C  C  )   QCS 2010 Section 2 Part 1 General Page 3 QCS 2010   1.3 MATERIALS ARISING 1.3.1 General Requirement 1 All materials arising from the demolitions are to become the property of the Contractor unless otherwise specified in the Project Documentation. 2 Materials arising shall be cleared from the site as the work proceeds in an approved manner. 3 Materials arising from the demolitions and alterations are not to be burnt on site. 4 Removal operations for materials arising should be conducted with the least interference to the public and not be started until approved by the Engineer. The Engineer has the right to reject off-site disposal plans if disposal would leave an unsightly condition anywhere. 1.4 SAFETY 1.4.1 Safety Requirements 1 The Contractor is to provide safeguards, including warning signs, barricades, temporary fences as required for the protection of the public and Site personnel during demolition and removal operations. The safeguards are to be maintained until demolition and removal operations are complete. 2 Within populated or trafficked areas and when adjacent to other structures the Contractor is to provide enclosed rubbish chutes from each floor to carry debris into disposal trucks/skips. Overhead bridges of tight board or prefabricated metal construction to be provided at rubbish chutes to protect persons and property from falling debris. 3 The Contractor shall conduct his operations in a manner that minimises the spread of flying particles and dust. Rubbish and debris shall to be sprinkled with water to keep dust to a minimum. 4 In addition, the following safety rules shall be observed in the performance of the work: (a) No wall or part of wall shall be permitted to fall outwardly from structures. (b) If the building is to be demolished storey by storey, at least one stairway in each structure shall be maintained in usable condition to highest remaining floor. (c) Stairways are to be kept free of obstructions and debris until that level of structure has been removed. (d) Wherever a cutting torch or other equipment that might cause a fire is used, provide and maintain fire extinguishers nearby ready for immediate use; all possible users are to be instructed in use of fire extinguishers. (e) Hydrants are to be accessible at all time; no debris is to be permitted to accumulate within a radius of 4 metres of fire hydrants. 5 The Contractor will at all times comply with the requirements of the Civil Defence Department. 6 In the case of structures that are to be partly demolished, the condition of those parts of the structure that are to be retained shall be checked for safety and stability before any demolition work begins. Similarly, the condition of adjoining properties which may be affected by the demolition shall be checked for safety and stability before any demolition work begins. 7 Independently supported platforms are to be provided to avoid working form that part of the structure being demolished. 8 Isolated walls should not be left unshored unless they are structurally stable against wind and other forces likely to affect them.  i  I  MP E R I  A L T R A D I  N  G &  C  ON T R A  C T I  N  G C  O.W.L .L  (  I  T  C  C  )   QCS 2010 Section 2 Part 1 General Page 4 QCS 2010   1.5 USE OF EXPLOSIVE 1.5.1 General Description 1 When the use of explosives is necessary for the carrying out of the work, the Contractor is to exercise the utmost care not to endanger life or property. The Contractor shall be responsible for all damage resulting from the use of explosive. 2 All explosives are to be stored in a secure manner in compliance with all the requirements of the Police, Civil Defence Department and the manufacturer of the explosive. All such storage places are to be clearly marked, “DANGEROUS - EXPLOSIVES”, in English and Arabic and shall be in the care of a competent watchman. 3 Explosives will not be stored closer than 300 metres from any road, building, camping area or place of human occupancy. 1.5.2 Procedures 1 The Contractor is to notify each public utility department having structures in proximity to the Site of his intention to use explosive. Such notice shall be given sufficiently in advance in order to enable the said authorities to take such steps as they may deem necessary to protect their property from damage. 2 The written consent of the Engineer is to be obtained for each proposal of the Contractor to use explosives. 3 Where blasting is proposed adjacent to a building or other structure, existing or under construction, the Contractor will satisfy the Engineer that safe values of vibrational amplitude and peak particle velocity will not be exceeded. 4 The Contractor is to comply with the provisions of BS 6657 in respect of the use of electrical detonators in the vicinity of static and mobile radio transmitters, including normal radio and television broadcasting stations and radar units associated with aircraft movements. 5 The handling, transport and use of explosives will be in accordance with the relevant provisions of BS 5607. Explosives are to be used in the quantities and manner recommended by the manufacturers. 1.6 SPECIAL INVESTIGATIONS 1.6.1 General Description 1 The Contractor is to ascertain from the responsible authority whether any mains or services need to be redirected or cut-off. The Contractor shall conform to any procedures prescribed by the relevant authority and the Engineer. 2 Notwithstanding any information supplied by the Engineer, the Contractor is to take all necessary steps to establish the presence of any stressed components, supporting walls and the like in the structures to be demolished. 3 Where special circumstances such as unknown soil conditions exist (which could reveal hazardous material) or where the structural components of the building support system are unknown, additional investigations as necessary will be performed. The cost of such investigations shall be borne by the Contractor unless otherwise stated in the Project Documentation. END OF PART
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