Four conditions decide the answer. First, brackets and columns must carry the maximum wheel load. On common bridge cranes that runs 150-600kN, with the dynamic factor included. Second, eaves headroom must let the hook reach its highest working position. Third,…
Yes, but only when the file is complete, the crane has passed a 1.25-times static load test, and its duty class matches the actual duty cycle. Prices typically run 40%–70% of a new machine, so the saving belongs to the…
Anti-sway control is an electronic drive technology. It shapes the acceleration and deceleration curves of hoist and trolley motion through a variable frequency drive. The result cuts residual load swing from 200–500 mm under manual operation to within 20–50 mm.…
An overhead crane or gantry crane enters the tariff under heading 8426. That first digit sets the path. Fixed-overhead traveling cranes fall at 8426.11, tire-mounted mobile frames and straddle carriers at 8426.12, and other bridge, gantry, and portal cranes at…
A loaded girder inevitably bends downward. Engineers call that elastic bend deflection. Under GB/T 3811, the acceptance limits are 1/700 of span for duty classes A1–A3, 1/800 for A4–A6, and 1/1000 for A7–A8. In real terms, a 20 m A5…
A foundry crane is a specialized overhead crane built to lift molten-metal ladles, such as steel ladles and iron ladles. Its main hoist must carry dual brakes plus a fixed cast ladle hook, and its duty class runs no lower…
Yes, but an ordinary crane cannot go straight in. Below -20 ℃, standard Q235 and Q355B steel turns cold-brittle, so buyers must switch to Q355D, which passes impact testing at -20 ℃, or Q355E, which passes at -40 ℃. The…
SWL (Safe Working Load) and WLL (Working Load Limit) mean the same thing under modern crane standards. Both state the maximum safe lifting weight the equipment is rated for, in tons. Span is the horizontal distance between the centerlines of…
A gantry crane foundation starts with one figure from the crane maker: the maximum wheel load. On common 5-100 ton gantry cranes, that figure runs from 150 to 600 kN. Fixed strip foundations most often use C25-C30 reinforced concrete ground…
Custom crane delivery times fall into four tiers by complexity. Standard models — parameters inside the maker’s catalogue — take about 25-35 days. Semi-custom builds with non-standard span or lift height take 40-55 days. Fully custom cranes for special duty…
