Industry-Verified Manufacturing Data (2026)

House (Upper Structure)

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard House (Upper Structure) used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical House (Upper Structure) is characterized by the integration of Slewing Ring and Machinery Deck. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-strength steel plate construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The rotating upper platform of a dragline excavator that houses the machinery and operator's cab.

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Product Specifications

Technical details and manufacturing context for House (Upper Structure)

Definition
The House, or Upper Structure, is the rotating superstructure of a dragline excavator mounted on the crawler base. It contains all major machinery components including the hoist and drag winches, swing machinery, power plant (diesel engine or electric motor), operator's cab with controls, and often the boom foot mounting. This structure rotates 360 degrees on the base to position the boom and bucket for digging and dumping operations.
Working Principle
The House rotates on a large slewing ring (turntable bearing) mounted on the crawler base. Powered by swing motors and reduction gears, it allows the entire upper assembly to pivot horizontally. This rotation, combined with boom movement and cable operations, enables precise positioning of the bucket throughout the digging cycle.
Common Materials
High-strength steel plate, Structural steel beams
Technical Parameters
  • Total weight of the upper structure including all mounted machinery (tonnes) Customizable
Components / BOM
  • Slewing Ring
    Large bearing that allows 360-degree rotation of the upper structure on the base
    Material: Alloy steel
  • Machinery Deck
    Platform that supports and houses the winches, power plant, and other machinery
    Material: Steel plate with reinforcement
  • Operator's Cab
    Enclosed control station for the operator with visibility and environmental controls
    Material: Steel frame with safety glass
  • Swing Gearbox
    Transmits power from swing motors to the slewing mechanism for rotation
    Material: Cast steel housing, alloy steel gears
  • Counterweight Frame
    Structure at the rear of the house that supports counterweights for balance
    Material: Structural steel
Engineering Reasoning
0.5-2.5 RPM rotational speed, 15-35°C ambient temperature range, 0.1-0.3 mm radial bearing clearance
Structural failure occurs at 3.8 RPM rotational speed (centrifugal force exceeds 2.1×design limit), bearing seizure at 85°C lubricant temperature, gear tooth fracture at 450 MPa bending stress
Design Rationale: High-cycle fatigue from cyclic loading at 0.5-2.5 Hz operational frequency, thermal expansion mismatch between steel (α=12×10⁻⁶/°C) and aluminum (α=23×10⁻⁶/°C) components, Hertzian contact stress exceeding 1.5 GPa at gear meshing interfaces
Risk Mitigation (FMEA)
Trigger Bearing lubricant contamination with 15 μm+ particulate matter
Mode: Accelerated abrasive wear leading to 0.5 mm radial play in slewing ring bearings
Strategy: Triple-sealed bearing housings with 5 μm filtration and continuous oil analysis monitoring
Trigger Torsional resonance at 2.3 Hz matching structural natural frequency
Mode: Crack propagation in weld joints at stress concentration factors (Kt) exceeding 3.5
Strategy: Finite element analysis-optimized ribbing pattern and dynamic vibration absorbers tuned to 2.1-2.5 Hz

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for House (Upper Structure).

Upper Works Revolving Frame Swing Frame dragline excavator upper structure rotating machinery deck for mining equipment high-strength steel dragline house excavator slewing platform components mining equipment operator cab housing

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Dragline Excavator
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (sealed cabin pressure maintained at 1 atm ±5%)
other spec: Max rotational speed: 0.5 RPM continuous, 1.0 RPM peak; Max payload capacity: 50-500 metric tons depending on model; Power input: 400V-690V AC, 50/60Hz
temperature: -20°C to +50°C (operational ambient)
Media Compatibility
✓ Open-pit mining environments ✓ Coal and mineral excavation sites ✓ Civil engineering projects with stable ground conditions
Unsuitable: Offshore/marine environments (due to corrosion and dynamic loading)
Sizing Data Required
  • Dragline boom length and bucket capacity (determines torque requirements)
  • Site ground bearing pressure (affects foundation and stabilization needs)
  • Required slewing speed and positioning accuracy for operational efficiency

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Structural fatigue cracking
Cause: Cyclic loading from wind, thermal expansion/contraction, and occupant activities leading to stress concentration at joints and connections
Foundation settlement/differential movement
Cause: Inadequate soil compaction, poor drainage causing soil erosion, or changes in moisture content leading to uneven support
Maintenance Indicators
  • Visible cracks in walls or ceilings wider than 1/8 inch, especially diagonal cracks at corners of doors/windows
  • Doors/windows that no longer open/close properly or floors that feel uneven/sloping
Engineering Tips
  • Implement regular structural inspections focusing on load-bearing elements, connections, and foundation perimeter for early crack detection
  • Maintain proper drainage systems and gutter/downspout functionality to prevent water accumulation near foundation

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASTM E119 - Standard Test Methods for Fire Tests of Building Construction and Materials CE EN 1990 - Eurocode: Basis of Structural Design
Manufacturing Precision
  • Vertical Alignment: +/- 5mm per 3m height
  • Wall Flatness: 3mm deviation over 2m length
Quality Inspection
  • Load Testing for Structural Integrity
  • Thermal Imaging for Insulation and Moisture Detection

Factories Producing House (Upper Structure)

Verified manufacturers with capability to produce this product in China

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✓ 95% Supplier Capability Match Found

P Project Engineer from Brazil Jan 09, 2026
★★★★★
"The House (Upper Structure) we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."
Technical Specifications Verified
S Sourcing Manager from Canada Jan 06, 2026
★★★★★
"Found 41+ suppliers for House (Upper Structure) on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Procurement Specialist from United States Jan 03, 2026
★★★★★
"The technical documentation for this House (Upper Structure) is very thorough, especially regarding technical reliability."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

17 sourcing managers are analyzing this specification now. Last inquiry for House (Upper Structure) from USA (1h ago).

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Frequently Asked Questions

What materials are used in the construction of the dragline upper structure?

The upper structure is constructed using high-strength steel plates and structural steel beams to withstand extreme loads and harsh mining environments.

What components are included in the upper structure assembly?

The assembly includes the slewing ring, machinery deck, operator's cab, swing gearbox, and counterweight frame - all integrated for optimal performance.

How does the upper structure contribute to dragline excavator operation?

The rotating upper platform houses all critical machinery and the operator's cab, enabling 360-degree rotation and precise control during excavation operations.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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