Identify a derelict building and taking into account factors such as its past use, condition, structural features and location, prepare a arrange for the safe demolition of the building that identifies the preferred method of demolition and outlines suitable complex and procedural control procedures.
The objectives of this report are to identify a derelict building and plan its demolition. The planning must take accounts of the specificities of the building's structure, its previous use, the website, the neighbouring properties and other guidelines. Control measures from a health and safety perspective have to be included.
The building discovered is an extremely old Victorian three-storey building that is not used for many years.
The methodology consists of analysing the existing framework and adjoining properties. An in depth information of the structure has been given and the demolition series has been chosen relative to the composition and in a way to cause minimal disruption to other properties and everyone.
The actual demolition plan is given by means of a set of tasks and a short explanation for every single job. The demolition process has been divided into critical phases.
The control actions have been designed in the program of the demolition but a health and safety risk examination has been done that lists the possible risks from such a work.
1 The Derelict Building
1. 1 Set ups to beDemolished
This three storey Victorian building is one of three structures in the same compound that used to house a vintage hospital on the website. The other two are also not in use and there are ideas to demolish them as well but at a later time. The Victorian building is a detached three storey building located centrally on the webpage with a shed used as boiler house on one side. Gain access to is from the south side where in fact the building is about 10 m from the street.
The Boiler House is defined to the north of the building but is detached from the main building. It contains one tall natural stone building with fastened oil and drinking water tanks.
There is a network of underground pipes between the boiler house and the Victorian buildings for the supply of hot water for local and heating up purposes.
As most Victorian properties of that size, these properties have certain characteristics that identify them from other complexes. The building engineering is of masonry. The strain bearing walls are constructed of two lines of brick with no gap in between. These external wall surfaces surge undisrupted to the roof structure.
The roof contains square timber rafters sitting on a timber diamond ring beam together with the surfaces. The rafters support a string if rectangular timber purlins that in turn support the slate tiles that form the rooftop. The sides are closed by hammered lead foils.
The internal flooring surfaces are made up of timber joists backed by stone mounting brackets off the brick wall space. A grid of timber beams are recognized from the joists and real wood planks are nailed to the most notable of the timber beams. The partition surfaces contain plastered timber frames.
The properties also contain basement that have been sealed in the past but is not filled.
There is not a insulation on the walls and roof top and there is no air-con installed in the building. The only services will be the hot and cool water pipes, drainage pipes and electric wiring. This particular pipes date from the initial structure and are of lead. The sanitary drainage pipes also time frame from original and consist of 5 cast flat iron pipes and fixtures lined with bitumen. The electric wiring has been installed much later and has been set to the timber joists through nailed clips.
The boiler house is a rock building with corrugated flat iron sheet roof. It contains a coal-fired boiler that has gone out of operation. The boiler is linked to the Victorian properties via underground pipes to provide hot water. The Boiler House also includes a large variety of tube work and fittings as well as a coal pit.
1. 2 AdjacentLand Use
The site is situated between two main streets on the South andEast factors and two B-class streets on the North and West sides. The site stocks a boundary with a much newer construction used as NHS medical center which will remain in use through the demolition. The site is bounded completely with 2. 5 m tall masonry walls except on the southern side. The south area is cordoned by wrought flat iron fencing. There is absolutely no wall between the parking lot of the center and the mixture.
1. 3 GroundConditions
Ground investigations were completed on samples of the south of the website during the development of a few of the newer buildings. The investigation email address details are available from the council. Since no new engineering is being performed in this task, ground information is regarded as to be unnecessary.
2 Explanation of Works
2. 1 Methodology
2. 1. 1 Survey
Since the building is not used for a substantial period of time, its exact point out is as yet not known even to your client. So the essential thing to be done is a full structural survey of the building to assess the risk from hazardous material and to decide on the best method of carrying out the task. This will need to be done as soon as the tender stage as the information from this study will be needed for the rest of the work.
- Adjoining properties
- The type of structure and the main element elements in it.
- The condition of the elements.
- Any requirement of short-term works or staging during demolition.
- Are there any limited spaces.
- Are there risks from asbestos, lead, polluted land, etc?
- Is access and egress adequate?
2. 1. 2 Preferred Method
The demolition can be transported in several ways but given the proximity of other properties such as the NHS block and main roads, the demolition should be completed in a way concerning minimise disruption to the neighbourhood and to cause minimum noise level.
The demolition should be designed to be carried out in a handled manner throughout, de-constructing the components in the opposite order of original development. Demolition balls will be used only as the final resort no explosive will be utilized.
2. 1. 3 Method Statement
- The collection and approach to demolition noting gain access to/egress details.
- Pre-weakening details of the structure
- Personnel safety, like the general public
- Service removal/make safe
- Services to be provided
- Flammable problems
- Hazardous substances
- The use of carry and throw away removal
- Identity of people with control tasks.
3 Particulars of Work
3. 1 Stage1: Planning
Before the demolition starts off, careful planning must ensure smooth businesses. It also allows problems to be identified at an early stage. The expense of remedial action at the planning stage is significantly less than that at the demolition level. So, allocation of time and effort to careful and in depth planning is vital.
3. 2 Stage2: Site Preparation
Once on site, the demolition cannot start immediately. There is a great deal of work that needs to be done to make the demolition work possible. Several precautionary methods and control measures need to be established right in the beginning. It really is cheaper and better than to use remedial action when things fail. The planning stage must have identified the areas that require attention and the control procedures that will be required. The processes involved in the real demolition are site specific and site preparations must be achieved accordingly. Good site preparation also allows little disruption to the neighbourhood.
3. 3 Period3: Demolition of Boiler House
From the risk examination, it is clear that the boiler house, although much smaller in size that the primary building, represents a larger health threat to the website workers as it includes asbestos, essential oil tanks, water tanks and a lot of pipe work. To lessen the publicity of the staff to such risks, it has been decided to demolish and make safe the boiler house first before starting with the key building.
3. 4 Period4: Demolition of Main Building
The main building will be demolished physically as far as possible. In order to contain the sound and air pollution as much as possible, the external walls and rooftop will be taken care of until the entire interior has been demolished. The inner partitions do not donate to the structural durability and balance of the building and it is therefore safe to demolish them. The floor surfaces do provide some lateral balance to the wall surfaces and can not be removed until an alternative solution short-term support is not provided to the wall space.
3. 5 Period5: Site Reinstatement
After the demolition is complete, the site should be cleared of left over dirt and decommissioning of site office buildings and other facilities installed for the purpose of the site. The site office buildings and welfare facilities will be removed. The express of residual contaminants needs to be assessed if any remedial action must be taken, it ought to be done. The landscaping should be re-established. Finally, the fencing and displays will be removed and the website handed-over.
3. 6 OtherElements
- Traffic Management, an increased awareness is necessary for traffic control to and from the website from the South and East sides. The South side adjoins an especially busy street with several shopping complexes further along the road.
- Unauthorised access to site from clinic block
- Unauthorised access from the main roads.
4 Control Measures
4. 1 HEALTH AND WELLNESS Hazards
4. 1. 1 Operational Hazards
- Electric surprise/burns
- Striking existing services
- Working at height
- Disconnecting of existing services
- Operating machinery, equipment, hand tools and mobile plant
- Hot works
- Manual handling
- Slip, trip, show up type injuries
- Dust / fumes
- Crush type injuries
- Contact with damaging substances
- Working in polluted ground
- Working in restricted spaces
4. 1. 2 Unsafe Construction Materials
- Fuel oils
- Glass fibre insulation
- Wood treatment products
- Used drainage pipes
- Floor Mastics / glues
4. 2 CDM
- The Consumer - shall appoint a reliable planning supervisor and principal contractor for every project
- The Custom - should design buildings to avoid, whenever we can, foreseeable dangers to health and safety during building, maintenance and cleaning work. Information should be provided on unavoidable hazards. Design includes the planning of specifications and not limited to computations and drawings.
- The Planning Supervisor - the organisation or person with overall responsibility for guaranteeing co-ordination of medical and safety aspects of the design and planning stage, the early phases of the health and safety plan and health and safety document.
- The Principal Company - grows the construction-phase health and protection plan and manages and co-ordinates the activities of all contractors to ensure they adhere to health and safeness legislation. They may have duties relating to the provision of information and training on health insurance and safety for everybody on site and the coordination of employees' views working on site.
- Contractors and the Self-Employed - must co-operate with the principal service provider and other contractors and provide relevant information on the risks created by their work and exactly how they'll be controlled.
5 References & Bibliography
- Site Safeness Handbook, 3rd Release, CIRIA, 2001
- Brown, D. The Engineering (Design and Management polices 1994: Advice for Designers in Steel, Steel Structure Institute, 1997.
- Holroyd, Trevor M, Site Management for Designers, Thomas Telford, 1999
- CIRIA, Environmental Handbook for Building and Civil Anatomist Projects: Construction Phase, Thomas Telford, 1998
- Managing Demolition and Engineering Wastes, Office of the Environment, 1994
- Demolition of Special Constructions, The concrete Modern culture, 1984
- Safety in Demolition Work, Health insurance and Safety Professional, 1979
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