Another key feature is the telescopic leg. When the crane is under no-load conditions, each leg can be extended by 20% to 40% of its original height. This raises the entire gantry, providing a significantly higher effective lifting height. This flexibility makes it far more adaptable than a fixed-height gantry crane.
EMH1 Adjusted by Manual Winch
The legs can be easily extended using two manual winches.
EMH2 Adjusted by Manual Screw
Manual screw driving is a manual drive method used to extend the leg. It enables millimeter-scale ascent, and requires no pin to lock the leg in place.
EMH3 Adjusted by Electrical Screw
Electrical screw driving uses an electric drive to extend the leg. The leg can be raised with millimeter-scale precision, and no pin is required to lock it in place.