Answer LA017855 Assmt 6 PDF

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this is the hand drawing of the assignment 6...

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CPCCBC4010B: Assessment 6

What you have to do Refer to Project 1 and Project 3 on the OLS and the sketching guidelines, to help you complete the questions below.

Sketching guidelines 

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This assessment contains a number of tasks requiring you to prepare sketches of relevant construction details. The sketches are to be prepared to a standard acceptable to allow communication of a detail as would occur on a construction site. Many details are communicated in this manner and everyone involved with building sites should be skilled in the preparation of sketches. Sketches are freehand drawings. Line work and proportion are important considerations that must be satisfied in the assessment. Select a scale/size appropriate to the detail. It is not expected everyone will have these skills at the commencement of this assessment. This first assessment may be presented with a mix of freehand sketches and ruled drawings. All should be completed in pencil on A4 size paper. Refer to the project documentation before commencing the drawings to clearly identify and comply with the documents. This question may require you to carry out research of the topics to broaden your knowledge before attempting the answers. Submissions, which are assessed to be not of an acceptable standard, will be returned with a request to resubmit the assessment.

All questions must be attempted and satisfactorily completed to achieve a pass. Question 1 (15 marks) (refer to Project 3) Develop a plan to demolish the existing dwelling shown on the site plan in accordance with the legislative and planning requirements and at all times utilising safe work practices. The dwelling will have been constructed from some building materials containing bonded asbestos. In your plan, list the relevant Acts, Australian Standards and Codes with which the processes will need to comply. Note: This is not a sketch, but a set of steps outlining your approach. You might include a sketch to indicate specific requirements of the demolition process.

PRELIMINARY DEMOLITION PLAN Factory Complex Development

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23 May 2014 Factory Development Centre T: [02] 9787 1233 F: [02] 9787 1234 EXECUTIVE SUMMARY This report provides a brief outline of the works required to demolish the existing buildings on the factory to be redeveloped into a mixed use development consisting of new factory units and car spots. The Preliminary Demolition Plan will be used as a reference document that provides the framework to ensure that demolition activities on the site do not adversely affect the health, safety, traffic or the environment of the public and neighbouring properties. The report is preliminary in its nature and will be developed in much more significant detail as the design is further developed. The Contractor will be required to prepare a detailed Demolition Plan and Construction Management Plan to the satisfaction of the Applicant and relevant Authorities prior to the commencement of works on site. A. Risk Management before Demolition Work 1. Olympic Designs has the primary duty to ensure the works and other persons are not exposed to health and safety risks arising from this demolish job. According to WHS Regulations, a SWMS for this demolish work should already been prepared. A copy of the asbestos register for Layland Factory has been carried out before demolishes work start. Olympic Designs will ensure that all asbestos will be removed by competent person before the demolition commerce. 2. Olympic Designs should manage risks associated with demolition work. ( Regulation 3438) Olympic Designs will identify hazards that could give rise to the risk, and eliminate the risk or minimize the risk and maintain the implemented control measure, and review, revise control measures to maintain a work environment that is without risk to health and safety. B. Planning the Demolition Work 1. Notifiable demolition work (Regulation 142) Tasmegs Development P/L should give written notice the regulator at least 5 days before any of the work commences1: Demolition of a structure, or a part of a structure that is load bearing or otherwise Related to the physical integrity of the structure, that is at least 6 meters in height Demolition work is involving load shifting machinery on a suspended floor, or demolition work involving explosives. The following details should be included in the notification: Name and contact details of authorized person from Olympic Designs Name and contact details of the person directly supervising the work The date of the notice The nature of the demolition Layland working site address should be disclosure in the notification

1 https://www.safeworkaustralia.gov.au/system/files/documents/1705/mcop-demolitionwork-v1.pdf, P11

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Tasmegs must ensure that a copy of the building permit for the demolition is displayed and accessible to the public. 2. Olympic Designs has a range of duties in relation to a construction project, including: Preparing and reviewing a WHS management plan Obtaining SWMS before any high risk construction work commences Putting in place arrangements to manage the work environment, including falls, facilities, first aid, an emergency plan and traffic management Installing signs showing the principal contactor’s name, contact details and location of any site office, and securing the construction workplace. Olympic Designs will also be required to prepare the following documentation prior to the commencement of demolition and/or excavation works: • Dilapidation Survey • Construction Waste Management Plan • Demolition Management Plan • Excavation Management Plan All works are to be undertaken in accordance with relevant EPA guidelines. In principle, the demolition process is undertaken in the reverse sequence as construction. Essentially, internal finishes will be stripped out. Services will then be removed including air conditioning, pipework and conduit. The facades will be removed where necessary and the structure will then be demolished using the larger plant and equipment. It is estimated that it will take 3 months to demolish and clear the site. Also refer to the Preliminary Construction Management Plan submitted as part of the Statement of Environmental Effects. 3. Setting out Olympic Designs is to engage and pay for a licenses registered surveyor to identify and peg necessary site boundaries, produce check surveys on footings and walls to verify location and alignment and produce an Identification Survey on completion. Before making the first Progress Claim the Builder shall provide a certificate from a registered surveyor stating that the building has been set out in accordance with the drawings and is wholly within the boundaries of the site. The existing buildings across the sites are of varying heights ranging from 10 - 15m above existing street levels. A number of the buildings have been built to within 20mm of the site boundary. Olympic Designs should ensure the two buildings to be demolished are not protected under the Heritage Act 1977(NSW) An A Class hoarding will be erected around the perimeter of the construction site prior to the commencement of demolition works. Additionally, wherever the risk arises of material falling into public areas, overhead protection will be provided in the form of a B Class hoarding. At this stage, it is anticipated that a B Class hoarding will be established on the Layland St boundary. Scaffolding will be erected to facades where materials could fall in excess of 4m. The scaffolding will be clad with chain wire and shade cloth to enclose debris and dust onto the site. During the demolition, dust control measures will be used to minimise the spread of dust from site.

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The Contractor will have a senior representative on site at all times to ensure compliance with the safety guidelines and agreed work methods. 4.

The following design matters should be taken into account when considering demolition risks2: 

the stability and structural integrity of the structure at all stages of demolition

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the maximum permissible wind speed for partially demolished structures

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the effect of the proposed demolition sequence on stability

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the stability requirements for all components of the structure as it is sequentially demolished according to the structural engineer’s requirements

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the proximity of adjacent or adjoining buildings

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the competent persons assessment of loadings at all stages of demolition

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the provision of clear instructions for temporary bracing

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the plant to be used for the work including the size, type, position and coverage of proposed demolition crane(s) should be indicated on a site plan, locations such as unloading points and storage areas (if any) should be shown the need to ensure that the ground is compacted to any design specifications to enable plant to be moved and used safely at the workplace

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the proposed methods for handling heavy, bulky or awkward components

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the need for specific lifting arrangements to be detailed on structural member drawings

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to facilitate safe lifting

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the handling, lifting, storing, stacking and transportation of components, depending

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on their size, shape and weight, and the provision of safe access and safe working areas

5. Tree Removal requirements There are few plants in the construction site need to be removed, and Banksia is governing by Bayside Council. Therefore, the requirements of tree removals from Bayside Council should be followed. 2 https://www.safeworkaustralia.gov.au/system/files/documents/1705/mcop-demolition-workv1.pdf, P13

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Tree removal permit should be obtained from Bayside Council. Olympic Designs should fill an application form and waiting for the Council’s accessing, then can start removing plants on the site. 6. Demolition Licensing Olympic Designs should acquire a license for the demolition. If asbestos show up, all asbestos or asbestos-containing materials at the work place is identified by a competent person and an asbestos register is prepared for work place (Regulations 422 (1)(2b), 425(1)). A person conducting a business or undertaking that commissions the removal of asbestos must ensure that the asbestos removal work is carried out by a licensed asbestos removals who is appropriately licensed to carry out the work, unless specified in the WHS Regulations that a license is not required(Regulation 458). 7. No part of the demolition process is adversely affecting the structural integrity of any other building, because there is no adjacent buildings and both adjoining buildings will be demolish at the same time. 8. Type of building to demolished A few general requirements for demolition buildings: Those building are not exempt development buildings, therefore, a council approval should be acquired before demolition work start The demolition site is NOT contaminated The Demolition site is NOT heritage significance The demolition site is NOT in a bushfire prone area The demolition site is NOT a critical habitat of an endangered species, population or ecological community under the Threatened Species Conservation Act 1995 or the Fisheries Management Act 1994; The demolition site is NOT a wilderness area under the Wilderness Act 1987. Buildings constructed before 1987 may contain asbestos. Information of the removal and disposal of asbestos is available from the Department of Environment, Climate Change and Water.3 Works must be structurally adequate, installed in accordance with manufacturer’s specifications and comply with the Building Code of Australia (BCA).4 Any structures that would be located on public land, or on or over a public road (including temporary structures), must have separate approval from the relevant council, or Roads and Maritime Services under the Roads Act 1993 and the Local Government Act 1993.5 With the exception of the existing concrete car park, the buildings to be demolished are generally constructed with load bearing masonry walls with steel or timber framed roofs and metal roofs. The buildings range from single to 2-storey. The buildings are generally constructed off a concrete slab on ground, presumably with strip and pad footings. There are no basement levels in any of the buildings. The factory complex which fronts Layland St is a conventionally reinforced concrete framed building. The substructure is comprised of a series of bored concrete piles.

3 https://www.planningportal.nsw.gov.au/understanding-planning/assessmentsystems/exempt-development/demolition-exempt 4 https://www.planningportal.nsw.gov.au/understanding-planning/assessmentsystems/exempt-development/demolition-exempt 5 https://www.planningportal.nsw.gov.au/understanding-planning/assessmentsystems/exempt-development/demolition-exempt

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Beyond the concrete frame, the room comprises masonry, plasterboard, mechanical services, some glass skylights and windows, existing escalators, terrazzo and tile floors and walls. 9. Disconnection of all essential services. Essential services include the supply of gas, water, sewerage, telecommunications, electricity, chemicals, fuel and refrigerant in pipes or lines. Olympic Designs must ensure, that essential services at the workplace are without risks to health and safety. Construction work is defined by the WHS Regulations as ‘high risk construction work’ when carried out: on or near pressurized gas distribution mains or piping on or near chemical, fuel or refrigerant lines, and on or near energized electrical installations. A SWMS must be prepared before this work commences. All electric, gas, water, sewer, steam and other service lines not required in the demolition process should be shut off, capped, or otherwise controlled, at or outside the building line, before demolition work is started. In this demolish working site, where core holes and embedment of services lines and fittings are required in the concrete and not shown on the drawings, details of such core holes and embedment shall be submitted to the Architect. Cores shall not be cut or drilled in the hardened concrete without the approval of the Engineer. Drains and other underground or enclosed work shall be left exposed until inspected, tested and approved. C. Controlling Risk During Demolition Work 1.Hazardous chemicals and materials According to Regulation 49, Olympic Designs should make sure there is no person at the workplace is exposed to a substance or mixture in an airborne concentration that exceeds the exposure standard for the substance or mixture. Before starting any demolition work, all areas of the workplace, including basements, cellars, vaults and waste dumps, should be examined to determine whether:  there are any items which could be a fire and explosion risk any previous use of the site might cause a risk because of the nature of and/or decomposition of materials, and  there are any toxic, radioactive or other hazardous chemicals present. Appropriate, clean facilities and amenities must be provided for workers to minimize risks where there are hazardous materials present. Any construction work including demolition work that involves or is likely to involve the disturbance of asbestos is defined by the WHS Regulations as high risk construction work and a SWMS must be prepared before this work commences. Meanwhile, only competent person can handle asbestos and remove it properly. Lead is found in paint, old water pipes and other plumbing fittings, sheet lead, solders, lead flashing, lead light windows and glass. The age of a structure may be directly related to the amount of lead that can be present. Meanwhile, only competent person could remove lead properly and reduce contaminations of the site. PPE should be provided to workers and worn when insulation (Synthetic Mineral Fibers) is being removed during the demolition process and dust should be suppressed by damping down. Workers can be exposed to Polychlorinated Biphenys (PCBs) when dismantling electrical capacitors and transformers or when cleaning up spills and leaks. Appropriate control measures should be implemented when handling damaged capacitors to ensure that any spillage does not contact workers and is appropriately cleaned up and disposed of.

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2. Securing the work area Olympic Designs should do exclusion zones to protect workers undertaking demolition activities by taking the following activities: erecting secure impassable barricades with adequate signage and appropriate lock out procedures to prevent unauthorized pedestrian or vehicular access to the area. 2 meter high temporary construction fencing must be provided around the allotment throughout the demolition period by Olympic Designs (AS1725). Appropriate signage is displayed throughout the works(AS1170) providing information to workers and other persons at the workplace advising them of the status of the exclusion zones, and providing supervision so that no unauthorized person enters an exclusion zone. Exclusion zones and safe distances may be required during: the stripping, removal and/or dropping of debris the operation of demolition plant or equipment pre-weakening activities for a deliberate collapse, and the deliberate collapse or pulling over of buildings or structures. 3. Public access and protection Olympic Designs should make sure adequate public safety should be maintained in public places and areas adjoining the workplaces as the demolition progresses. Security fencing, containment sheets and mesh, an overhead protective structure, road closures and specified exclusion zones. Overhead protective structures should be provided for public walkways in conjunction with perimeter fencing. 4. All plants and equipment should be operated by competent person 5. Risk of fall must be managed according to WHS Regulations. 6. Electricity power sources should be strictly controlled and monitor. 7. Adequate fire prevention equipment should be provided and maintained at all times during demolition of a structure. 8. Olympic Designs should make sure that all workers should successfully complete general construction induction training. (Regulation 317) D. Demolition Method 1.Olympic Designs will take mechanical demolition as the main demolition method. 2. All powered mobile plant used for demolition work must be fitted with a suitable combination of operator protective devices. 3. Throughout the demolition period, the work shall be under the continuous supervision of the demolisher or of an experienced foreman from Olympic Designs. 4. Demolition Method It is anticipated that the Contractor will prepare a detailed Demolition Plan prior to the commencement of work on site, however, the indicative demolition methodology will be as follows: The strip out and removal of non-structural elements will be undertaken utilising manual labour and small plant including – bobcats, 3-5t excavators and dingo type loaders. The materials will be removed from site using small to medium sized trucks. The structures will be demolished using larger plant and equipment including 15-40t hydraulic excavators. These machines will be equipped with rock breakers, pulverisers and the like which would be used in a sequential manner. This sequential nature is the reverse order to the method of construction (refer to section 3.4 of AS2601-2001). The positioning of plant and equipment onto the suspended slabs will be subject to the advice of a structural engineer. This engineer will be engaged to provide further engineering advice in relation to temporary support or back propping of the structure during demolition.

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Additionally, the engineer will be used to assist in the selection and movement of plant between floors. Equipment will be moved between floors by a number of methods including carnage, construct...