Industry:
Metals Processing
Application:
Maintenance Crane for a Bloom Furnace
Location:
Ohio
Duty Cycle:
CMAA Class D
Project Description:
One (1) New 15 Ton Capacity Top-Running, Double Girder, 3-Motion, EOT Maintenance Crane
Application Highlights:
This crane was engineered and manufactured for heavy-duty service in a demanding environment. Designed for an 81’-0” span and 55’-0” lift, it operates on a 460 VAC / 3 phase / 60 Hz power supply and is controlled by a belly box style radio system. Built for CMAA Class D service, the crane is capable of reliable performance in ambient operating temperatures from 40°F to 120°F. The system was designed and manufactured to meet all current CMAA, OSHA, ANSI/ASME, and NEC specifications.
Technical Specifications:
- Main Hoist: 15 Ton
- Span: 81’-0”
- Lift Height: 55’-0”
- Voltage: 460 VAC / 3 / 60
- Service Classification: CMAA Class D – Heavy Service
Mechanical Features:
- Welded steel box girder bridge construction with oversized wing and shear angles for added rigidity
- Fabricated plate box section end trucks, stress relieved and precision machined for accurate alignment
- Heavy-duty trolley frame with structural tube end trucks, welded and machined for reliability
- Rotating axle wheel assemblies with spherical bearings
- Flame-hardened hoist drum grooves and sheaves
- Heavy-duty lower block with forged alloy steel hook, hook rotation lock, safety latch, and swivel trunnion
- Full-length foot walk with OSHA-compliant 42″ handrails, slip-resistant floor plate, toe boards, and self-closing access gates with tie-off points
- Crossover walkway between girders with safety handrails and self-closing gates
- Energy-absorbing polyurethane bridge and trolley bumpers
Electrical & Safety Features:
- Lockable fused main crane disconnect
- NEMA 12 control enclosure with integrated air conditioning (rated for 140°F)
- Variable frequency controls for bridge and trolley; flux vector control for hoist with encoder feedback
- Dynamic braking resistors and overload protection
- Cattron AT-series belly box radio control system with spare transmitter, batteries, and charger
- LED crane lights mounted on hinged service brackets
- Operator-controlled motor-driven warning siren
- Red/Green crane status lights for power indication
- Hoist upper & lower geared rotary limit switches and block-actuated limit switches
- Four (4) 120 VAC service outlets on bridge foot walks
- Collision avoidance and warning systems