LA023626_Assn3_Answer sheet_CPCCBC4018A_Ed5
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CPCCBC4018A: Assessment 3
Answer sheet
Please type your answers in black font. (Calibri 12 point)
STUDENT DETAILS
Student Name: TAFE ID:
UNIT AND ASSESSMENT DETAILS
Unit Number: CPCCBC4018A
Assessment No: 3
LA Number: LA023626
DECLARATION
I hold a copy of this assessment.
I have completed all parts of the assessment.
I hereby certify that no part of this assessment or product has been copied from any
other student’s work or from any other source except where due acknowledgement is
made in the assessment.
Student’s signature: _________________________________________
(Electronic Signature is accepted)
Note: OTEN has the right to reject your assessment if the above declaration has not been
completed.
What you have to do
For this assessment, you will require the Project 1 documentation. The questions in this
assessment relate to Project 1.
LA023626, Assessment 3, Answer sheet, CPCCBC4018A, Ed5
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© New South Wales Technical and Further Education Commission, 2018 (TAFE NSW – WSI), Archive version 1, July 2018
How you will be assessed
The questions in this assessment cover a number of areas within the unit of competency
You will need to show that you are competent across all the areas contained in this
assessment.
YOU MUST show all workings where you have done calculations.
Please type your answers in black font. (Calibri 12 point)
Questions
1.
You have taken a measurement on Lot 14 from the south west corner to the north east
corner of the allotment. The measurement you obtained from your tape measure, laying
it on the ground, was 43,866 mm, measured to the nearest millimetre.
a)
Is this the true dimension for the distance between the two pegs on plan view?
No this is not the true dimension.
b)
If the answer to part ‘a’ is no, what is the true dimension on plan view and explain the
reason for the difference? (use Pythagoras’ theorem)
A= √(B2+ C2)
A= √18.002+40.002
A= √324.00 + 1600.00
A= √1924.00
A = 43.863m
Error = 43.866 -43.863 = 3mm
The tape measure measurement is the reason it resulted in a 3mm split. As well as it
is also located over the lot’s rising contour, which would be unaccounted for on the
site plan.
2.
You have engaged a surveyor to carry out an identification survey of Lot 14 (peg the
four corners of the boundaries) and to peg the 6m building line (the setback of the house
from the front boundary).
a)
From the north west corner of the allotment, calculate the angle and distance to the
north west corner of the proposed building
c=a2+b2
=60002+15002
=6184.6
14 degrees
b)
From the contours determine the total fall across the footprint of the building
Total fall around the footprint of the building= 250mm
Total fall = 500
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LA023626, Assessment 3, Answer sheet, CPCCBC4018A, Ed5
© New South Wales Technical and Further Education Commission, 2018 (TAFE NSW – WSI), Archive version 1, July 2018
c)
Assuming you will construct a level, rectangular platform for the construction of the
building, extending 1m beyond the external walls of the building, what are the
approximate dimensions of this platform?
20 580 x 13 870
d)
Utilizing the surveyors pegs, outline, step by step, how you would set out the building
using profiles and string lines to allow any excavation, formwork/slab construction to
be accurately completed.
1)
Obtain the necessary building plans, site plans, and any relevant
documentation.
2)
Start by identifying the reference point or benchmark on the site. This could
be a permanent structure or a fixed point on the site, such as a surveyor's peg
or a marked point.
3)
From the reference point, establish the building's overall dimensions and
layout using the provided plans. Measure and mark the corners of the
building footprint accurately.
4)
Drive surveyor's pegs into the ground at each corner of the building. Ensure
they are firmly secured and extend above ground level. These pegs will serve
as reference points for the building's corners.
5)
Next, set up profiles. Profiles are usually wooden or metal stakes placed at
regular intervals along the building's perimeter. They help maintain accurate
alignment during construction.
6)
Attach a string line between two opposing pegs to form a straight baseline.
This line will serve as a guide for setting up the profiles accurately.
7)
Align the profiles along the string line, ensuring they are perpendicular to the
baseline and positioned at the correct distances according to the building
plans. Use a spirit level or a plumb bob to ensure the profiles are vertical.
8)
Once the profiles are in place, stretch string lines tightly between them,
ensuring they are parallel to the baseline and at the correct heights specified
in the plans. These string lines will define the outer edges of the building
walls.
9)
Repeat the process for each side of the building, attaching string lines to the
profiles and adjusting their positions as necessary.
10) With the string lines in place, you can accurately excavate or prepare the
ground within the outlined area. The lines will guide the excavation to ensure
the correct dimensions and alignment.
11) If formwork or slab construction is required, the string lines will provide
accurate references for setting up the formwork, ensuring it follows the
intended layout.
12) Throughout the construction process, regularly check the alignment of the
profiles and string lines to maintain accuracy. Adjust as needed to ensure the
building is being constructed according to the plans.
By following these steps, you can effectively set out the building using profiles and
string lines, allowing for accurate excavation, formwork, and slab construction.
LA023626, Assessment 3, Answer sheet, CPCCBC4018A, Ed5
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© New South Wales Technical and Further Education Commission, 2018 (TAFE NSW – WSI), Archive version 1, July 2018
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e)
Outline how you would construct the formwork to achieve the required Finished Floor
Level.
To construct formwork to achieve the required Finished Floor Level (FFL), follow
these general steps:
1)
Understand the design requirements: Review the building plans and
specifications to determine the desired FFL and any specific requirements for
the formwork construction.
2)
Prepare the site: Ensure the area where the formwork will be constructed is
properly excavated and compacted, with any necessary drainage or insulation
installed.
3)
Install formwork supports: Place formwork supports, such as timber or steel
props, at regular intervals along the perimeter of the area where the
formwork will be built. Ensure the supports are level and securely positioned.
4)
Set up formwork panels: Attach formwork panels to the supports, forming the
boundaries of the floor area. The panels can be made of plywood, metal, or
other suitable materials. Ensure they are properly aligned and levelled.
5)
Provide for reinforcement: If reinforcement is required, such as rebar or
mesh, install it according to the design specifications, following the required
spacing and positioning. Use appropriate methods to secure the
reinforcement in place, such as wire ties or rebar chairs.
6)
Install kickers and bracing: To provide stability and prevent the formwork from
bowing outwards, install kickers (diagonal supports) and bracing. These
components are typically made of timber and are securely attached to the
formwork panels and the ground.
7)
Check the formwork for level and alignment: Use a spirit level and string lines
to check that the formwork panels are level and aligned properly. Make any
necessary adjustments to ensure they are in accordance with the desired FFL.
8)
Seal joints and corners: Apply suitable jointing compounds or sealants to the
joints and corners of the formwork panels to prevent concrete leakage during
pouring.
9)
Install additional formwork elements: Depending on the design and
requirements, additional formwork elements may be needed, such as edge
forms or bulkheads. Install these components securely and according to the
plans.
10) Inspect and approve formwork: Before proceeding with concrete pouring,
have the formwork inspected by the appropriate authority or project
supervisor to ensure it meets safety and quality standards.
11) Pour and finish the concrete: Once the formwork is approved, proceed with
pouring the concrete to the desired level. Ensure proper compaction and
consolidation techniques are used during the concrete placement process.
Smooth and level the surface according to the required finish.
12) Allow the concrete to cure: After pouring, follow the recommended curing
procedures to allow the concrete to gain strength and stability. This typically
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LA023626, Assessment 3, Answer sheet, CPCCBC4018A, Ed5
© New South Wales Technical and Further Education Commission, 2018 (TAFE NSW – WSI), Archive version 1, July 2018
involves covering the concrete with curing compounds, blankets, or moist
curing methods.
13) Remove the formwork: Once the concrete has achieved sufficient strength,
typically after a designated curing period, carefully remove the formwork.
Start with the supports, kickers, and bracing, and then disassemble the
formwork panels.
f)
From finished floor level shown on the drawings (RL 0.000), subtract 200mm to allow
for the slab and sub grade thickness. This reduced level is sometimes referred to as
the bulk excavation level (BEL). From this BEL, the contours, and the dimensions of
the rectangular platform, calculate the approximate volume of the bulk excavation for
the building (use diagrams where needed to illustrate your method).
Excavation platform: 21x14
As a result, the average excavation depth is estimated:
Compact Hardcore Layer + Slab thickness + Sand Blinding= 325mm
All four corners have a depth of 0.300, 0.275, 0.100 and 0.075
As for the height- (0.625 + 0.600 + 0.425 + 0.400) = 2.05
2.05/4= 0.513m
Therefore our volume= 21x14x0.513= 151m3
3.
Assuming the RL at the top of the vehicle access (crossing) is 0.030, the top of kerb is
-0.030 and the kerb height is 100mm,
a)
Draw a longitudinal section of the vehicle crossing from the kerb to the front boundary
Lot 14. (Note that the length of the crossing is 3.2m; determined by scaling off the
drawing)
b)
Determine the grade from the top of the crossing to the bottom of kerb as a
percentage and a ratio.
Ratio = 1/53
Decimal = 1.9%
LA023626, Assessment 3, Answer sheet, CPCCBC4018A, Ed5
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© New South Wales Technical and Further Education Commission, 2018 (TAFE NSW – WSI), Archive version 1, July 2018
4.
The client on Project 1 has requested provision be made for storm water detention on
the site. The hydraulics engineer has calculated the capacity of the pit necessary for the
site to be 23,000 litres.
Calculate a pit dimension that would meet this capacity requirement and that can be
constructed within the front area of the property; that is, in the area between the front
boundary and the front building line. Do not position the tank within 3m of the building.
(1000L = 1m3)
4m wide X 6m long X 1m deep = 24m3
Checklist
I have:
named my file appropriately.
surname_Your first initial.Unit number_Assessment number (e.g. Smith
S.4018A_A3)
completed the Assessment cover sheet
submitted my assessment report as a single combined PDF file.
answered all questions in the manner described
clearly identified my answers
saved a copy of the assessment on my computer
checked spelling, grammar and punctuation
presented my own work, used only my own words, except where cited, and
followed the presentation guidelines found on the OLS
If you require clarification, please contact your teacher at OTEN to discuss.
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LA023626, Assessment 3, Answer sheet, CPCCBC4018A, Ed5
© New South Wales Technical and Further Education Commission, 2018 (TAFE NSW – WSI), Archive version 1, July 2018
NOTE: This is a competency-based assessment. You will receive a result of
Satisfactory
or
Unsatisfactory
. This means that you must satisfactorily complete each question (or
part thereof) to meet the competency requirements set out in the training package. If you
do not meet the competency requirements, you will need to resubmit your assessment
until competency is achieved.
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