Planning for Demolition of Building

grooming for Demolition of BuildingIdentify a derelict twist and taking into account factors such as its previous use, condition, structural features and location, prepare a purpose for the safe demolition of the building that identifies the preferred method of demolition and outlines suitable technical and procedural supremacy measures.The objectives of this report are to identify a derelict building and plan its demolition. The cookery has to stop account of the proper(postnominal)ities of the buildings mental synthesis, its previous use, the come in, the neighbouring properties and separate parameters. Control measures from a wellness and safety point of view have to be included.The building identified is a very old Victorian three-storey building that has not been used for more years.The methodology consists of analysing the existing structure and adjoining properties. A detailed description of the structure has been given and the demolition sequence has been chosen i n accordance with the structure and in a way to cause minimal disruption to other properties and the general public.The actual demolition plan is given in the form of a list of tasks and a brief explanation for each task. The demolition process has been divided into critical phases.The control measures have been incorporated in the plan of the demolition alone a health and safety risk assessment has been done that lists the possible hazards from such a work.1The Derelict Building1.1Structures to be razedThis three storey Victorian building is one of three buildings in the same compound that used to house an old hospital on the send.The other two are also not in use and at that place are plans to demolish them as well but at a later(prenominal) realize. The Victorian building is a detached three storey building positioned centrally on the site with a shed used as timpani house on one side.Access is from the south side where the building is about 10 m from the road.The B vegetab le oiler home plate is set to the north of the building but is detached from the main building. It consists of one tall orchestra pit building with attached oil and water tanks.There is a network of underground organ pipes between the timpani house and the Victorian buildings for the supply of hot water for domestic and heating purposes.As most Victorian buildings of that size, these buildings have certain characteristics that distinguish them from other buildings. The building whirl is of masonry. The load bearing walls are made of two lines of brick with no gap in between. These external walls rise undisrupted to the jacket crown.The roof consists of square tone of voice rafters posing on a timber ring beam on top of the walls. The rafters detain a series if rectangular timber purlins that in turn support the slate tiles that form the roof. The edges are sealed by hammered lead foils.The internal floors are made up of timber joists supported by stone brackets off the brick walls. A grid of timber beams are supported off the joists and wooden planks are nailed to the top of the timber beams. The partition walls consist of plastered timber frames.The buildings also consist of basement that have been sealed several years ago but has not been filled.There is no insulation on the walls and roof and there is no air conditioning installed in the building. The only function are the hot and cold water pipes, drainage pipes and electric fit. The water pipes date from the original construction and are of lead. The sanitary drainage pipes also date from original and consist of 5 cast iron pipes and fittings lined with bitumen. The electric wiring has been installed much later and has been fixed to the timber joists by means of nailed clips.The boiler house is a stone building with corrugated iron sheet roof. It contains a coal-fired boiler that is out of operation. The boiler is connected to the Victorian buildings via underground pipes to supply hot water. Th e Boiler House also contains a large number of pipe work and fittings as well as a coal pit.1.2Adjacent Land UseThe site is situated between two main roadstead on the South andEast sides and two B-class roads on the North and West sides. The site shares a boundary with a much newer construction used as NHS clinic which will remain in use during the demolition. The site is surrounded completely with 2.5 m tall masonry walls except on the south side. The south side is cordoned by wrought iron fencing. There is no wall between the parking lot of the clinic and the compound.1.3Ground ConditionsGround investigations were carried out on samples of the south of the site during the construction of some of the newer buildings. The investigation results are available from the council. Since no new construction is being undertaken in this project, ground entropy is deemed to be unnecessary.2Description of works2.1Methodology2.1.1SurveySince the building has not been in use for a significant period of time, its exact stir is not known even to the client. So the offset thing to be done is a full structural fall out of the building to assess the danger from hazardous material and to decide on the best method of carrying out the work. This will need to be done as early as the tender stage as the information from this survey will be essential for the rest of the work.Before the start of the demolition, a full scale demolition survey will need to be done. This should take account of the following(Holroyd, 1999)Adjoining propertiesThe image of structure and the key elements in it.The condition of the elements.Any requirement for temporary works or staging during demolition.Are there any confined spaces.Are there hazards from asbestos, lead, contaminated land, etc?Is access and egress adequate?2.1.2Preferred MethodThe demolition can be carried in a number of ways but given the proximity of other properties such as the NHS block and main roads, the demolition should be carr ied out in a way as to minimise disruption to the neighbourhood and also to cause minimum noise level.The demolition should be planned to be carried out in a controlled manner from top to bottom, de-constructing the components in the reverse order of original construction. Demolition balls will be used only as the last retrogress and no explosive will be used.2.1.3Method StatementA method statement needs to be prepared before the job starts and should blot out (Holroyd, 1999)The sequence and method of demolition noting access/egress details.Pre-weakening details of the structurePersonnel safety, including the general publicService removal/ demonstrate safe go to be providedFlammable problemsHazardous substancesThe use of transport and waste removalIdentity of people with control responsibilities.3Particulars of Work3.1stage 1 PlanningBefore the demolition starts, careful planning is required to ensure smooth operations. It also allows problems to be identified at an early stage. T he cost of remedial action at the planning stage is significantly less than that at the demolition stage. So, allocation of time and effort to careful and thorough planning is very important.3.2Phase 2 aim PreparationOnce on site, the demolition cannot start immediately. There is a lot of work that needs to be done to make the demolition work possible.Several preventive measures and control measures have to be established right at the start. It is cheaper and better than to apply remedial action when things go wrong. The planning stage must have identified the areas that need attention and the control measures that are required. The processes involved in the actual demolition are site specific and site preparations must be done accordingly. Good site preparation also allows minimal disruption to the neighbourhood.3.3Phase 3 Demolition of Boiler HouseFrom the risk assessment, it is clear that the boiler house, although much smaller in size that the main building, represents a great er health hazard to the site workers as it contains asbestos, oil tanks, water tanks and a lot of pipe work. To reduce the exposure of the personnel to such risks, it has been decided to demolish and make safe the boiler house first before starting with the main building.3.4Phase 4 Demolition of Main BuildingThe main building will be demolished manually as far as possible. In order to contain the noise and air pollution as much as possible, the external walls and roof will be maintained until the entire interior has been demolished. The internal partitions do not contribute to the structural strength and stability of the building and it is therefore safe to demolish them. The floors do provide some lateral stability to the walls and will not be outside until an alternative temporary support is not provided to the walls.3.5Phase 5 Site ReinstatementAfter the demolition is complete, the site has to be cleared of remaining debris and decommissioning of site offices and other facilitie s installed for the purpose of the site. The site offices and welfare facilities will be removed. The state of residual contamination has to be assessed and if any remedial action needs to be taken, it should be done. The landscaping should be re-established. Finally, the fencing and screens will be removed and the site handed-over.3.6Other ElementsThe Principal Contractor should also be aware of the followingTraffic Management, an increased awareness is required for traffic control to and from the site from the South and East sides. The South side adjoins a particularly busy road with several shopping complexes further along the road.Unauthorised access to site from clinic blockUnauthorised access from the main roads.4Control Measures4.1General Health Hazards4.1.1Operational HazardsElectric shock/burnsStriking existing servicesWorking at heightDisconnecting of existing servicesOperating machinery, equipment, hand tools and mobile plantHot worksManual handlingSlip, trip, fall type i njuriesDust / fumesCrush type injuriesContact with harmful substancesWorking in contaminated groundWorking in confined spaces4.1.2Hazardous edifice MaterialsMaterials within the project with the potential to cause a hazard to health and safetyAggregatesFuel oilsSand codswallop fibre insulationSewageGlassWood treatment productsUsed drainage pipesDustCementMasticsSealantsPaintsFloor Mastics / gluesAsphaltFumes4.2CDMThe spin (Design and Management) Regulations came in effect in UK 31st meet 1995. The main duties of the five key parties (CIRIA, 2001) areThe Client shall appoint a competent planning supervisor and principal contractor for each projectThe antecedent should design structures to avoid, wherever possible, foreseeable risks to health and safety during construction, maintenance and cleaning work. Information should be provided on unavoidable risks. Design includes the preparation of specifications and not contain to calculations and drawings.The Planning Supervisor the organisation or person with overall responsibility for ensuring co-ordination of the health and safety aspects of the design and planning phase, the early stages of the health and safety plan and health and safety file.The Principal Contractor develops the construction-phase health and safety plan and manages and co-ordinates the activities of all contractors to ensure they comply with health and safety legislation. They have duties relating to the provision of information and training on health and safety for everyone on site and the coordination of employees views working on site.Contractors and the Self-Employed must co-operate with the principal contractor and other contractors and provide germane(predicate) information on the risks created by their work and how they will be controlled.5References BibliographySite Safety Handbook, 3rd Edition,CIRIA, 2001Brown, D. The Construction (Design and Management regulations 1994 Advice for Designers in Steel, Steel Construction Insti tute, 1997.Holroyd, Trevor M, Site Management for Engineers, Thomas Telford, 1999CIRIA, Environmental Handbook for Building and Civil Engineering Projects Construction Phase, Thomas Telford, 1998Managing Demolition and Construction Wastes, Department of the Environment, 1994Demolition of superfluous Structures, The concrete Society, 1984Safety in Demolition Work, Health and Safety Executive, 1979