Views: 2 Author: Site Editor Publish Time: 2026-06-23 Origin: Site
Q1: What is the main purpose of a Derrick Crane?
A: It is a specialized rooftop crane primarily used to safely dismantle inner climbing tower cranes once a skyscraper is completed.
Q2: Why is it also called a "rooftop crane"?
A: Because it is specifically sent to and assembled on the very top roof of a building to perform its job.
Q3: What is the maximum weight the SD4030-20 can lift?
A: It has a massive maximum lifting capacity of 20 tons.
Q4: How far can the crane arm (jib) reach?
A: The total jib length for this model is 40 meters.
Q5: What is the "Tip Load" of the SD4030-20?
A: At its furthest 40-meter reach, it can still safely lift a load of 3.0 tons.
Q6: Can this crane lift other rooftop equipment?
A: Yes! Beyond dismantling, its 20t capacity is perfect for installing heavy HVAC units, generators, and helipad structures.
Q7: What range of derrick cranes do we offer?
A: We supply a full, comprehensive range of derrick cranes ranging from 4 tons up to 24 tons to fit any project size.
Q8: Why buy your derrick cranes over others?
A: We offer the complete package: premium SYM brand reliability, full-tonnage options (4-24t), and expert technical support for high-altitude safety.
Need a quick quote? Click [Inquire] or drop your building height below, and our team will match the perfect crane for your project!
#DerrickCrane #RooftopCrane #HighRiseConstruction #SYM #HeavyLifting
