From the north west corner

Mohammad darwiche 369403605
CPCCBC4018A: Assessment 3
What you have to do
For this assessment, you will require the Project 1 documentation. The questions in this
assessment relate to Project 1.
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.
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
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)
182 + 402 = 1924
√1924 = 43.863mm
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
62 = 1.52 = 38.25 1.5/6.18 = 0.243
√387.25 = 6.185m tan-1 (0.243) = 13o38’34.49”
b) From the contours determine the total fall across the footprint of the
building
Assessment 3 CPCCBC4018A Ed 3 1
© New South Wales Technical and Further Education Commission, 2014 (TAFE NSW – WSI), Version 3, August 2014

0.3-0.075= 0.225
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?
South wall 1= 14830mm
West wall= 13870mm
North wall 1= 14830mm
East wall 1 = 1600mm
North wall 2 = 5080mm
East wall 2 = 7030 mm
South wall 2 = 5080mm
East wall 3 = 6760mm
c) 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.
Dimensions = (11870+1000+1000)*(16910+1000+1000) = 13870 mm x 18910 mm
d)_Outline how you would construct the formwork to achieve the required
Finished Floor Level.
A rotating laser can be used to set up the level from the bench mark that can
ensure excavation to the exact level and check formwork, edgeboard level.
During concrete pour, using rotational laser to check the level and adjust the
slab level, otherwise set up several points and check level by laser level
e) 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).
Volume = Area x Average depth
=[(0.540+0.475+0.265+0.290)/4]*[13.870*18.910]
= 102.945 m3
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)
2 Assessment 3 CPCCBC4018A Ed 3 © New South Wales Technical and Further Education Commission, 2014 (TAFE NSW – WSI),
Version 3, August 2014

b) Determine the grade from the top of the crossing to the bottom of
kerb as a percentage and a ratio.
Grade = Length : Height
= 3200:160
P00# - LRO / AG / MG/ LA# Assessment #; Unit # Ed1(Edit blue bits as required) 3
© New South Wales, Department of Education and Training 2010, Version 1, MM/YYYY

=20:1
= 5%
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)
23000 litres = 23 m3 = 1 m deep x 2 m wide x 11.5 m long
Assessment checklist
I have:
 Completed ALL questions in this assessment.
 Included my name, student number, unit number, assessment
number
 Reviewed and spell checked my document
 Saved a copy of the assessment on my own computer
4 Assessment 3 CPCCBC4018A Ed 3 © New South Wales Technical and Further Education Commission, 2014 (TAFE NSW – WSI),
Version 3, August 2014