Published on February 18, 2014
ì Introduction Of Demolition DKA6A GROUP 4
Methods of Demolition ì Manual ì Mechanical -‐Crane and demoli1on ball -‐Pnuema1c impact tool -‐Mechanical arm -‐Explosion DKA6A GROUP 4
Manual 1. INSTALLATION OF WORK SITE DKA6A GROUP 4
REMOVAL OF ROOF DKA6A GROUP 4
DISMANTLING SUPERSTRUCTURES ì Cut the outlets of all the plant in the building ì Buildings demolished using iron hammer carefully ì Buildings un1l the fall DKA6A GROUP 4
Mechanical ì Crane and demoli1on ball -‐Crane and ball demoli1on is one of the oldest demoli1on methods devised and is s1ll commonly used all across the United States v Cheap v Save 1me v Less cost DKA6A GROUP 4
DKA6A GROUP 4
Pneumatic impact tool ì Same as it only manually demoli1on using this tool DKA6A GROUP 4
Mechanical arm ì Using mechanical arm to demoli1on building DKA6A GROUP 4
Explosion ì This method is quite dangerous because the resul1ng explosion DKA6A GROUP 4
Kelebihan dan kekurangan pada setiap cara perobohan. Muhammad Faiz Bin Mad Sakri 08DKA11F1021 DKA6A GROUP 4 ì
Kren dan bebola Kelebihan Keburukan ì Cepat ì murah ì Perlu tenaga mahir ì Bangunan untuk dirobohkan terhad ì Bising DKA6A GROUP 4
DKA6A GROUP 4
Letupan Kelebihan ì Pekerja sikit ì Murah ì Cepat ì Tak bergegar Kekurangan ì Memerlukan ketepatan masa ì Debu banyak ì Pegawai yang mahir ì Peralatan sikit DKA6A GROUP 4
DKA6A GROUP 4
Alatan tangan Kelebihan ì Serba boleh Kelemahan ì Lambat ì Cekap ì Mudah dikendali DKA6A GROUP 4
DKA6A GROUP 4
Hydraulic arm Kelebihan Kekurangan ì Mudah ì Lambat ì Boleh diubah mengikut ì Tidak sesuai untuk bangunan kesesuaian bertetulang DKA6A GROUP 4
DKA6A GROUP 4
ì DKA6A GROUP 4
Legislative Requirements in Demolition ì Planning for demolition work - selecting appropriate methods of demolition & equipment to be used ì Appointing a competent person experienced in demolition work to assess & inspect the structure to be demolished during the course of the demolition work ì Erecting appropriate hoardings, catch platforms and overhead protection barriers for protection of the public & personnel on the site DKA6A GROUP 4 ì Maintaining security of site.
Clear directional sign Clear directional sign Overhead protection scaffold Overhead protection scaffold DKA6A GROUP 4
Safety in Demolition Preparatory operations including pre-demolition surveys and overall planning of demolition work covering methods to be used to bring the structure down equipment necessary to do the job, & t measures to be taken to perform the work safely, DKA6A GROUP 4 All planning work performed by a competent person relevant experience in all stages of demolition work.
Hand tools for demolition DKA6A GROUP 4 Cutting of vertical facade wall panel.
Pre-demolition Surveys Engineering surveys should be carried out include structural stability, existing services & presence of hazardous substances DKA6A GROUP 4
Risk Assessment Risk assessment to identify hazards associated with the demolition process, assess such hazards and take reasonably practicable steps to eliminate or control the risks arising from hazards. DKA6A GROUP 4
Demolition Plan ì The method statement for demolition works should clearly indicate the sequence of demolition, approach to demolition and elements that require specialised methods of removal. Operators and staff involved in the demolition works should be well informed and well versed with how works are to be carried out, the sequence of such works and the safety precautions to be taken prior to the commencement4 works. DKA6A GROUP of
Pre-demolition Work ì Glass and cladding on external walls should be removed prior to commencement of any demolition works. ì Services / utilities should be capped, diverted or protected prior to the commencement of any demolition works. DKA6A GROUP 4
Protective Precautions Machinery / Equipment ì All demolition equipment should be operated by competent persons with appropriate training. These equipment should be used and maintained as recommended by the equipment’s manufacturer or supplier. DKA6A GROUP 4
Lifting Equipment DKA6A GROUP 4
Machinery / Equipment ì Lifting equipment should be thoroughly examined by an authorised examiner at least once every 12 months for those lifting goods or materials or once every 6 months for those lifting personnel. ì Only excavators that are originally designed and manufactured to also function as a lifting machine can be registered by an Authorised Examiner as a lifting machine and be used for lifting purposes. DKA6A GROUP 4
Scaffolding ì Scaffolds above 4m in height (excluding tower and trestle scaffolds) should be erected, installed, added, altered or dismantled by an approved scaffold contractor. ì Working platforms should be free from debris ì Every scaffold should have at least one designated access point. ì Care should be taken to prevent damage to scaffolding components from4 DKA6A GROUP falling debris.
Scaffolding DKA6A GROUP 4
Public Safety ì The demolition site should be properly barricaded with appropriate warning signs posted. No unauthorised entry should be permitted in the demolition site ì Hoardings and covered walkways should be provided in conjunction with catch platforms to guide pedestrian flow and DKA6A GROUP 4 protect pedestrian traffic against falling debris.
Well lit covered walkways with clear signage DKA6A GROUP 4
Worker Safety ì Workers involved in demolition works must be provided with appropriate training and instructions to carry out demolition works safely. ì Supervision is needed to ensure that only those workers who have received training and instructions are authorised to carry out the work. DKA6A GROUP 4
ì All personnel assessing the demolition site must be provided with safety boots and helmets. Workers should, when necessary, be provided with appropriate personal protective equipment such as goggles, hearing protection devices, safety harness, gloves, appropriate respirators for dust or chemicals & protective clothing. DKA6A GROUP 4
Misting to control dust DKA6A GROUP 4
Asbestos Management ì When a building or structure is ascertained to contain asbestos, all asbestos materials should be properly removed prior to the commencement of demolition. ì Asbestos removal should be carried out and supervised by someone trained in asbestos removal and management. ì Demolition contractors should take reasonably practicable measures to control the release of asbestos fibres by preventing or minimising breakage of asbestos materials. DKA6A GROUP 4
Demolition work for specified building Wrecking Ball ì The wrecking ball application consists of a crane equipped with a steel ball. ì The destruction of the building is by the impact energy of the steel ball suspended from the crawler crane ì The wrecking ball operates outside the building ì This method is suitable for dilapidated buildings, silos and other industrial facilities. DKA6A GROUP 4
Application Criteria free falling of the wrecking ball onto the structure. 1. Ver0cal Drop -‐ 2. Swing in line -‐ swinging of the ball in-line with the jib. A second dragline will normally connect to the ball horizontally to control the ball motion. The ball shall be swung into the building. The ball shall strike at the top of the member so as to avoid the member from falling outside the building. DKA6A GROUP 4
DKA6A GROUP 4
Environmental effects in demolition work Air pollu0on ì Concrete breaking, handling of debris and hauling process are main sources of dust from building demolition ì Dust mitigation measures complying with the Air Pollution Control (Construction Dust) Regulations shall be adopted to minimise dust emissions. Burning of waste shall not be allowed ì Diesel fumes generated by mechanical plant or equipment shall be subject to the control of the Air Pollution Control (Smoke) Regulations. DKA6A GROUP 4
Noise ì Noise pollution arising from the demolition works including, but not limited to, the use of specified powered mechanical equipment (SPME), powered mechanical equipment (PME), such as pneumatic breakers, excavators and generators, etc., scaffolding, erection of temporary works, loading and transportation of debris, etc. affects the workers, and the sensitive receivers in the vicinity of the demolition site. DKA6A GROUP 4
Hazardous Materials ì The asbestos abatement works shall be carried out in accordance with the Air Pollution Control Ordinance (APCO) and the Factories and Industrial Undertakings (Asbestos) Regulations before demolition ì Other materials such as LPG cylinders in domestic flats, toxic and corrosive chemicals for industrial undertakings, and any other hazardous materials have to be identified and properly handled and removed prior to the commencement of the demolition of the building. DKA6A GROUP 4
Übersetzung für Demolition im Englisch-Deutsch-Wörterbuch dict.cc.
Englisch-Deutsch-Übersetzung für demolition im Online-Wörterbuch dict.cc (Deutschwörterbuch).
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