Structural & Electrical
Heavy Crane Loads and HT Power
Engineering for 30 MT crane loads and 11 kV incoming supply across two furnace bays
The problem
The melting and holding furnace bays needed to support very heavy, dynamic crane loads — up to 30 MT on the melting platform alone — across a 15m clear-height shed, while keeping crane rail access at a workable 10m for maintenance. At the same time the plant needed a reliable 11 kV HT supply capable of feeding both continuous furnace loads and standby DG backup, without single points of failure that could halt a molten-metal process mid-cycle.
The solution
Structural frames were sized for the full crane duty cycle: three 10 MT plus one 30 MT EOT cranes and a 5 MT monorail on the melting platform, and two 10 MT plus two 5 MT EOT cranes on the holding furnace bay, with crane rail level fixed at 10m inside a 15m clear-height shed. Mezzanine floors at 3.5m were added at maintenance walkways and pouring areas without interrupting crane runway clearances. On the electrical side, 11 kV HT supply enters via underground cable to a metering kiosk with CT and PT, through an isolator with earth switch and gantry, into two main HT transformers. Seven internal distribution transformers with LT panels step down power for individual machine areas, backed by four 750 KVA DG sets, each with a dedicated diesel tank.
The outcome
A structural frame that carries its heaviest lift — 30 MT — with full maintenance access at a safe 10m crane rail height, and an electrical system with layered redundancy from HT metering through to DG backup, so a furnace in the middle of a melt is never exposed to a single power failure point.