13 Questions
What is the recommended climbing angle for aerials, towers, platforms, and ground ladders?
70 to 80 degrees
When deploying ladders, what should be avoided?
Contact with overhead TTC wires
Who is responsible for deploying and bedding ladders?
Firefighters
When using ground ladders, what is important to ensure?
The ladder is butted properly at the base
What is the minimum safe distance from overhead TTC wires that a firefighter's climbing route should maintain?
1m
What voltage of direct current is provided by the TTC overhead power network?
600 volts
Under what condition may the height of the overhead wires decrease?
During high temperature
Who is authorized to shut down and confirm a power shutdown in a requested grid area?
Authorized TTC personnel
What is the minimum qualification required for a TTC overhead electrician to be in the TFS Command Post?
Grade 1
Why should firefighting personnel wear full TFS required PPE?
When working around TTC energized overhead wires and other energized equipment
How far away from TTC overhead wires should aerials, towers, platforms, and ground ladders be positioned?
At least 1m
What should personnel consider when positioning aerials, towers, platforms, and ground ladders?
The placement style requested and the proper distance from buildings/obstacles
What should be ensured when positioning aerials, towers, platforms, and ground ladders?
That they are positioned on a solid, level surface where possible
Study Notes
TTC Overhead Power Network (OCS)
- Provides electrical energy of 600 volts direct current (VDC) to electrical wires and equipment of the TTC's streetcar network.
- Overhead wires are usually 18 feet high, but can decrease depending on weather conditions.
- Extremely high levels of tension are used to suspend the OCS wires.
- Higher voltage wires may be in proximity to TTC wires.
Authorized Personnel and Safety Precautions
- Only authorized TTC personnel can shut down and confirm a power shutdown in a requested grid area.
- A minimum Grade 1 TTC overhead electrician must be in the TFS Command Post to relay information from TTC to TFS.
- Firefighting personnel must wear full TFS required PPE while working around TTC energized overhead wires and other energized equipment.
Positioning of Aerial, Towers, Platform and Ground Ladders
- Aerials, towers, platforms, and ground ladders must be positioned at least 1m away from TTC overhead wires.
- Personnel positioning ladders must be aware of the placement style requested (rescue, attack, self-rescue).
- The proper distance from buildings/obstacles varies and depends on the required height and use of the ladder.
- Personnel should be aware of potential structural collapse when positioning ladders and monitor all communications.
Ladder Operations
- Firefighters shall deploy and bed ladders according to Equipment Notes, Standard Operating Guidelines, and Training Notes.
- Aerials, towers, platforms, and ground ladders shall never be positioned to contact overhead TTC wires for support.
- Ensure optimum climbing angles of 70 to 80 degrees where possible.
- Ensure a firefighter's climbing route keeps them at least 1m away from overhead TTC wires.
- Ground ladders shall be butted properly at the base to ensure safe climbing and descending.
- Avoid setting up ladders over window or door openings where possible.
- Ensure the incident is sufficiently cordoned off to protect firefighting personnel and the public.
This quiz covers safety guidelines for firefighters during aerial, tower, platform, and ground ladder operations, including positioning and deployment procedures.
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