US 30532

US 30532

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^{Please complete all of the self checks to gain your final assessment grade (80%)}

Look at the range of hazards you need to be aware of

See the next slide

Multiple Select

What were the issues?

• Spoil placed to close to edge of trench.

• Edges of excavation should be battered or benched down

• Excavator to close to excavation could collapse trench.

• Digger operator can't see his workers

• Workers not wearing RPE

Head down bum up ,how often is this the case just get in and get the job done . Not taking any time to consider any hazards around you or others

Try researching these documents

There are examples of these in the ACOP for Excavations & Shafts, also do a web search and view your study guide on the types of dewatering methods

Use your ACOP for Excavations & Shafts for further info

Good signage and barriers here!

Legally you have a responsibility to make sure you do not bring harm to yourself or others,If someone injures themselves because you haven’t protected your excavation you and your employer are liable to be charged In court 

Edge protection in place to keep the public safe

Taken from G13, check the rest of this code out! Proximity of open trenches to foundations is very important, especially if it is close to a boundary.

Look at this scenario, any issues?

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Team work often relies on your mates all chipping in, check out the next slide to see what happens if you have too many mates in a trench!

This poor worker did not survive

Watch the next slide

This shows how fast a job can go horribly wrong with the incorrect shoring and excavtion/ demolition process

​Dewatering

Final question set #1

Answer the following

Multiple Choice

At what depth must you notify worksafe about excavations?.

• 2m

• 1.5

• 3m

• 2.5

Multiple Select

What is the term used when making a excavation safe?

• trimming

• angle cut

• benching

• bulk cut

Multiple Select

What 3 things should you check before you begin excavation.

• Check you have the right tools

• You have permission/consent to excavate

• Service plans

• A 20 ton digger.

• Supervisors instruction

Multiple Choice

What is the safe distance to leave spoil near an excavation edge

• 1m

• 600mm

• 1.5m

• As close as practicable

Multiple Choice

Which is the correct side of excavation to place spoil?

• The bottom picture

• The top picture

• Non, it should be further away

Multiple Choice

What is this diagram showing?

• A trench next to a building

• A trench next to a retaining wall

• A trench showing safe distance away from wall.

• A trench showing safe distance from a footing

Look at this a couple of times to get the concept. "A" calculation is a deduction to make the pit even

Final question check #2

Answer the following

Multiple Select

What are the first 2 things do you need to consider when dewatering trenches.

• How long is it going to take

• Do I need permission to dewater trench from council/Supervisor

• Are dewatering controls are in place

• How much water volume.is being pumped

• Can dirty water can be into a kerb and channel

Multiple Select

What is the hierarchy of hazard control.

• Protect

• Eliminate

• Safeguard

• Isolate

• Minimize

Multiple Choice

Calculate the total volume only

• 210m cube

• 504

• 420m cube

• Approx 480 cube

Well done!

You have now completed this lesson and your final assessment