Frequently Asked Questions
What type of overhead crane is commonly used above 20 tons?
Most overhead crane systems above 20 ton capacity utilize top-running crane configurations designed for higher structural efficiency, improved hook-height optimization, and increased heavy-load stability. Double girder bridge designs are commonly used for long spans and demanding industrial duty cycles.
What hoists are typically used with heavy-capacity overhead cranes?
Heavy-duty wire rope hoists are commonly paired with above-20-ton overhead crane systems because they support higher lifting capacities, long lift heights, and demanding industrial operating conditions.
Can above-20-ton overhead cranes be installed in existing buildings?
Possibly, but structural engineering review is typically required. Existing building columns, runway beams, support steel, and wheel-loading tolerances must be evaluated before installation to confirm compatibility with the proposed crane system.
Are above-20-ton overhead cranes suitable for outdoor operation?
Some systems may be engineered for outdoor use, but outdoor installations require additional review for wind loading, environmental exposure, corrosion protection, drainage conditions, and structural support requirements.
What is the difference between a gantry crane and an overhead crane?
Gantry cranes operate on floor-supported legs and do not require elevated runway structures, while overhead bridge cranes operate on elevated runway systems attached to building structures or engineered support steel.
When are double girder overhead cranes preferred?
Double girder overhead cranes are commonly preferred for heavy-capacity applications requiring longer spans, increased hook height, higher-duty operation, or improved lifting stability under demanding industrial conditions.
What information is required to request a quote?
Most heavy-capacity overhead crane quotations require lifting capacity, bridge span, lift height, runway length, operational duty cycle, power supply specifications, building support conditions, and load-handling requirements.