The document discusses safety features for tower cranes, including zoning functions to prevent over-sailing of critical areas like power lines, and anti-collision systems allowing cranes to automatically track each other at a safe speed and distance. While these systems minimize safety risks on congested job sites, they are also very expensive to implement due to complex electrical requirements and approvals needed.

2. Introduction:
The risk associated with the use of tower cranes on job sites – collisions
between cranes, collision with high voltage electricity lines etc…may have
serious consequences.

3. Zoning:
This function prevents the over-sailing of critical zones and of static obstacles
(high voltage lines, railway lines, public places, schools…).
Can define up to 15 zones
Definition of zones with lines, circles, arcs or point by point
Hook height management is possible

4. Anti-collision:
The AC 243 system
allows cranes to track
each other automatically
at an optimum speed
and distance in
complete safety.

5. Conclusion:
Advantages:
1. Safe work and crane movement in congested
area.
2. Minimize the risk of operation of cranes.
3. Ease of operation.
Problems:
1. Very Expensive
2. Complex Electrical Arrangement
3. Approval for HVPR