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.
The dwelling earmarked for demolition will be deconstructed manually and in accordance to the Australian standards in order to achieve the required procedure which is as follow:
- All the vital services that are connected to the building must first be disconnected in accordance to the relevant authorities’ requirements.
- There must be a waste management plan that must be approved by the Waste Authorities at least two days prior to commencing the demolition.
- Runoff and erosion must be taken into consideration and appropriate controls established for them.
- All the demolition should be carried out in accordance to the AS 2601-2001, demolition of structures.
- Since the building contains some asbestos abatement of the aforementioned will be carried out. It is important that the Environmental Planning and Assessment Regulation 2000, is taken into consideration as well as the Work and Health and Safety Regulation 2011. This particular type of demolition should be done by a skilled and licenced contractor only.
- Hydraulic excavator will be used for this particular demolition which will consider the direction in which it falls so as not to affect its adjacent buildings.
- It is important to control dust, noise, coldness, heat, UV Rays, and vibrations. It is important to use fire horses during the process which will maintain a wet demolition.
- The safety of the workers and other members of public must be given first priority during the undertaking of this entire process.
Question 2 (5 marks)
(refer to Project 3)
From the project documentation, illustrate the loads the building will be subjected to during its life. Prepare a simple sketch of a section passing through the centre of the building, showing the structural elements of the building and the loads applied.
Draw arrows on the section to show the direction the load path will take to transfer the loads to the foundation of the building. Your illustration(s) should deal with wind loads as well as dead and live loads.
Question 3 (10 marks)
(refer to Project 1)
Research and list the Building Code of Australia requirements for the dwelling if it was to be built within the following zones:
- Bushfire (medium risk)- Australian standards AS 3959- BAL 19
- a)protecting the underfloor area and lower portion of the wall by closing off thespace with non-combustible, weather resistant materials (see Figure 188.8.131.52);and
- (b) installing metallic and corrosion-resistant screens to doors, sub floor vents
- and openable sashes and louvres in windows; and
- (c) installing non-combustible roofing and fire retardant sarking (see Figure184.108.40.206); and
- (d) fully enclosing the underside of eaves.
- High wind-
Windstorms cause most of the damage to housing in Australia. Population growth is exposing more people and buildings to risks from these wind hazards. Houses and components are currently designed and built to standards aligned with the Building Code of Australia regulatory measures including building inspections are meant to ensure acceptable quality of construction. Inspections and post windstorm damage surveys have consistently shown that contemporary houses (post 1980) perform better than older houses (pre 1980) in high wind / cyclone and non-cyclone areas. Australian up northern costal line from Perth (WA) to Kyogie (NSW) is high wind region of Australia Figure 1
- Australian building code requirement as per AS 11704, The Build designs within earthquake zone evaluated from Table 1 from 2.6 of AS 11704.4-2007
- èImportance Level èSite sub-soil class èHazard Factor (Z) è Probability Factor (kp)
- è Building Height
- Alpine area (NSW)
An external door in a building constructed in analpine area, which may be subject to a build-up of snow must-
(a)open inwards; and
(b)be marked “OPEN INWARDS” on the inside face of the door in letters not less than 75 mm high and in a colour contrasting with that of the background; and
(c)if it serves a corridor or stairway, be positioned in an alcove or recess with- (A) no horizontal dimension of the alcove or recess less than twice the width of the door; and
(B) the door positioned to open against a wall such that the distance from any part of its swing to the nearest point of entry of the stairway or corridor is not less than the width of the door.
-An external ramp serving an external doorway must have a gradient not steeper
Discharge of external doorways providing a means of egress
-a) or any external walls more than 3.6 m above the natural ground level, the distance of that part of the building from the allotment boundary (other than a road alignment) must be not less than 2.5 m plus 100 mm for each 300 mm or part by which that part of the external wall exceeds a height of 3.6 m; and
- b) An external doorway may discharge into a court between wings of a building
provided the wings are not less than 6 m apart; and
(c) Where an external doorway discharges opposite a barrier or embankment which is more than 900 mm above the threshold of that doorway, thedistance between the threshold and the barrier is not less than twice the height of the barrier or 6 m, whichever is the lesser (see Figure 220.127.116.11).
External trafficable structures
External stairways, ramps, access bridges or other trafficable structures serving the building must have-
(a) a floor surface that consists of steel mesh or other suitable material if it is used as a means of egress; and
(b) any required balustrade constructed so that its sides are not less than 75% open.
Question 4 (20 marks)
(refer to Project 1)
- (15 marks)
A site inspection is necessary prior to tendering or commencing construction on a project to assess the natural and developed features of the site which will contribute to the cost and/or planning of the construction.
Consider the site of the dwelling is vacant and you are intending to tender on the construction of the building. Create a checklist for a preliminary site inspection of the site which could be used on future projects. The checklist should be word processed and incorporate tables where suitable.
- The topography of the site area
- The availability of surface water bodies and flow directions
- Check on the type and condition of hardstand material
- Check the site infrastructure (current and historical)
- Check the current site activities (and historical where possible)
- Confirm the usage of land surrounding the site
- Check if there is any contamination of soil on the site (staining, odour, stressed vegetation etc.)
- Check for a suitable area for waste management
- Confirm the presence of hazardous building materials, including asbestos, synthetic mineral fibre, polychlorinated biphenyls (PCBs) and lead paint.
- (5 marks)
Provide a sketch of the site clearly showing salient features such as:
Question 5 (10 marks)
(refer to Project 1)
Prepare a list and description of all the relevant services required or likely to be installed in and around the building and note any special provisions needed. For each service, list the Australian Standard or Code with which the service must comply.
- Water piping
- Drainage for sewage system
Question 6 (35 marks)
(refer to Project 1)
Prepare a checklist to ensure the quality of each of the following systems to the building:
- a) Footing
* Check the strength of formwork materal
* Check the watertight-ness of the formwork
* The footing dimension should be as in the design
* The form-work should be placed in the correct alignment
* The quality of reinforcement bars must be checked: size, spacing, diameter,
* Column reinforcement must be placed appropriately
- Timber floor
* Check the appearance pf the timber mainly colours and patterns
* Check the long term resilience and comfort of the timber used for the florr
* Check their quality such that they don’t emit dust
* check its strength to weight ratio
* Consider the cost of the type of timber
- c) Concrete Floor
* Check ratio of concrete mix
* Check the amount of water used for curing
* Follow up on the curing process
- Timber frame walls
- Masonry walls
- Check the quality of masonry
- Check the strength of masonry used
- Truss roof
- Check h quality of timber used for roof
- Check the resilience of timber used
- Framed Roof
- Check the price of frame
- Check the stability of frame