Working at Height Flashcards
What type of ladder should be used when working near high voltage?
A wooden or fibre glass ladder.
Why should you not paint a wooden ladder?
Hides any defects.
What visual safety checks should you carry out on a wooden stepladder before use?
Check for splits, or damaged components, tie cord, hinges, metal ties.
What visual safety checks should you carry out on an aluminium stepladder before use?
Check for dents, or damaged components, tie straps, hinges, metal ties.
How high should you climb a stepladder and be safe?
So your knees are level with the top step.
How far above the step off point should a ladder project?
1050mm or 5 rungs.
When using an extension ladder how many rungs should overlap?
4 rungs.
When working at height what health & safety regulation should you be complying with?
Working at height regulations (WAHR) 2005
When using a ladder how should it be secured?
Tied at the top for access or footed for short duration.
What type of scaffold uses the building for support?
Putlog Scaffold
What type of scaffold stands on its own and is only tied to the building for stability?
Independent scaffold.
How are materials and tools prevented from falling from the scaffold?
By the brick guard and toe board.
What is the height of a handrail on a scaffold?
Between 910mm – 1150mm
At what height should the intermediate handrail be fitted?
Not more than 470mm from toe board and more than 470mm to top handrail.
What is the height and purpose of the toe board?
150mm high, to prevent tools and material falling off.
What is the minimum size of a hop-up platform?
600mm x 600mm.
How can a mobile tower be built higher?
By attaching stabilizers.
How often should a ladder be inspected?
Every time before use.
When should a wooden ladder not be used near high voltage electrics?
When the ladder has a reinforcement wire inserted into the ladder stiles.
What action would you take if you found a defect on a ladder when inspecting it?
Do not use it, remove from use and label, report it to your supervisor.
How would you gain access to the top platform of a mobile tower?
By climbing up the internal ladders.
How would you move a mobile tower?
Remove personnel and tools from platform reduce height to 2 lifts and push from the bottom.
How many people can work from a tower at the same time?
Two people and their tools.
How many people can climb a ladder at the same time?
Only one person is allowed on a ladder at a time.
What is the greatest risk when working at height?
Falling.
What angle should a ladder be erected?
75 degrees or 1 : 4
What item of access equipment is required to work just above head height?
A hop-up.
When erecting a tower inside a building what is the maximum height it can be erect?
3 ½ times the smallest base dimension.
When erecting a tower outside a building what is the maximum height it can be erect?
3 times the smallest base dimension.
When using a 38mm thick scaffold board what is the maximum span between supports?
1.5m
How many scaffold boards are required for a minimum working platform width?
4 scaffold boards wide.
What is the maximum overhang for a 38mm scaffold board?
38mm x 4 = 152mm
What is the minimum overhang for a 38mm scaffold board?
50mm
How is working at height usually defined?
Working at any height that would cause an injury if you fell.
When can you use a ladder at work?
If you are doing light work for a short time or for access.
You need to use a mobile tower scaffold. The wheel brake do not work, what action should you take?
Do not use the tower, remove from use and label, report to supervisor.
What is the best way to protect people below a scaffold from falling tools and materials?
Install brick guards & toe boards.
Who should check a ladder before use?
The person using it
