This document provides instructions and specifications for a student activity calculating reinforcement requirements for a concrete footing. It includes a legend, plan, and section drawings of the footing along with specifications on the trench mesh, concrete dimensions, and cover requirements. Students are asked to calculate the perimeter of the footing, lengths of trench mesh needed including laps and splices, required spacer height accounting for cover, and number of trench mesh supports. The goal is to practice calculations relevant to determining reinforcement quantities as required for carpentry work.

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CPCCSF2004 Place and fit reinforcement
Calculation Activity 1 - Trench Mesh
Student Copy
Today’s Tip
At work, you most likely used maths and calculations to carry out
your tasks.
Today we are looking at lengths, quantities, heights, and minimum
cover for reinforcement.
Think about how some of the calculations you do daily for other
material can be applied to these questions about reinforcement.
Remember your employer will one day ask you to work out
quantities of reinforcement and components as part of your
duties as a carpenter.
Instructions
Complete the following calculations, your assessor will give you a
hard copy of the activity for you to complete in class.
Once completed, your answers need to be uploaded to My
Profiling.
Using the Information from the Legend, Plan, and Section
drawings, complete the four calculations and show all working.
Where required you may need to reference information from the
National Construction Code (NCC) (section 3.2.3.2) use link below.
ncc.abcb.gov.au
You may discuss in groups the methods and how to resource the
information from the NCC however the calculations must be
completed individually.
You will have 1.5 hours to complete this task.

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Specifications
Note:
The calculations below are a learning activity not an assessment.
Note:
Calculations like these will be in your practical assessment.
Concrete footing dimensions 500 mm wide x 500 mm deep
Pad footings 500mm widex 500mm deep
Trench mesh L11TM4 (theseare 6m lengths)
External corner lap Full width lap as per NCC
requirements
Internalcorner Lap Full width lap as per NCC
requirements
Lap or Splice (longitudinal join) 500 mm as per NCC requirements
Spacers 900mm centres
Trench Mesh supports 800mm centres
Cover to trench mesh 50 mm top
50mm btm
50 mm max to sides

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Question 1: Calculate the perimeter footing in Metres.
Calculation workings
Answer

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Question 2: Calculate how many lengths of L11Tm4 are required for the footing.
Include laps and splices.
Calculation workings
Answer:

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Question 3: What height spacers are required to make the reinforcement cage for
this footing? (Hint don’t forget to allow cover)
Calculation workings
Answer

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Question 4: What is the correct number of trench mesh supports required for the
reinforcement cages used in this footing?
Calculation working
Answer