---
title: "Bridge Crane"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:BRIDGE_CRANE"
  data_integrity_hash: "0d3abd3d3fb0109b4ee18a06127ae2bf"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:BRIDGE_CRANE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bridge-crane.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/bridge-crane"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "5-50 kN lifting capacity, 3-30 m span, 0.1-2.0 m/s hoisting speed, 0.5-3.0 m/s trolley speed, 1.0-4.0 m/s bridge speed"
    unit: "tons"
engineering_limits:
  max_safe_operating_point:
    value: 1.5
    unit: "x"
    consequence: "Yield strength exceedance in steel girders (S355 steel yields at 355 MPa), Euler buckling in columns (critical load P_cr = π²EI/L²), bearing fatigue (L10 life at 90% reliability)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hoist motor insulation breakdown at 155°C Class F temperature limit"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Embedded PT100 temperature sensors with PLC cutoff at 140°C, VFD with I²t thermal modeling"
  - node_2:
      trigger: "Wheel flange wear reducing contact area below 40% of original"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hardened 55 HRC steel wheels with ultrasonic thickness monitoring, crowned runway profiles"
bom_nodes:
  bridge-girder:
    type: "part"
    urn: "URN:CNFX:ME:BRIDGE_GIRDER"
    interface_type: "physical-logic-coupled"
  end-trucks:
    type: "part"
    urn: "URN:CNFX:ME:END_TRUCKS"
    interface_type: "physical-logic-coupled"
  hoist-unit:
    type: "part"
    urn: "URN:CNFX:ME:HOIST_UNIT"
    interface_type: "physical-logic-coupled"
  trolley:
    type: "part"
    urn: "URN:CNFX:ME:TROLLEY"
    interface_type: "physical-logic-coupled"
  runway-system:
    type: "part"
    urn: "URN:CNFX:ME:RUNWAY_SYSTEM"
    interface_type: "physical-logic-coupled"
  control-system:
    type: "device"
    urn: "URN:CNFX:ME:CONTROL_SYSTEM"
    interface_type: "physical-logic-coupled"
  safety-devices:
    type: "part"
    urn: "URN:CNFX:ME:SAFETY_DEVICES"
    interface_type: "physical-logic-coupled"
  operator-cabin:
    type: "part"
    urn: "URN:CNFX:ME:OPERATOR_CABIN"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bridge-crane.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "dcaa19172ed634fdce55eadf886867f0146f61e962d2b7b8beef634f0872be5c"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Bridge Crane

## 1. Technical Definition
An overhead crane consisting of parallel runways with a traveling bridge spanning the gap, used for lifting and moving heavy loads horizontally within a facility.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **5-50 kN lifting capacity, 3-30 m span, 0.1-2.0 m/s hoisting speed, 0.5-3.0 m/s trolley speed, 1.0-4.0 m/s bridge speed**. Failure boundary: **Structural failure at 1.5x rated load (75 kN for 50 kN crane), bridge deflection exceeding L/800 (37.5 mm for 30 m span), motor thermal overload at 150% rated current for 60 seconds**, Mechanism: **Yield strength exceedance in steel girders (S355 steel yields at 355 MPa), Euler buckling in columns (critical load P_cr = π²EI/L²), bearing fatigue (L10 life at 90% reliability)**.

### 2.1 Analytical Physics Model
Governed by the **Frame Structural Deflection Analysis**:

> **Primary Equation**: $\delta = \frac{5 q L^4}{384 E I}$  
> **Engineering Impact**: Ensures structural stability for multi-stage machines.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| q | Uniform Load | Engineering Constant |
| E | Elastic Modulus | Engineering Constant |
| I | Moment of Inertia | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hoist motor insulation breakdown at 155°C Class F temperature limit | 8 | Phase-to-phase short circuit causing immediate torque loss | Embedded PT100 temperature sensors with PLC cutoff at 140°C, VFD with I²t thermal modeling |
| Wheel flange wear reducing contact area below 40% of original | 8 | Bridge derailment from runway beams at lateral forces exceeding 10% of wheel load | Hardened 55 HRC steel wheels with ultrasonic thickness monitoring, crowned runway profiles |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | tons | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Bridge Girder](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bridge-girder.md) `(Standalone System)`
- [End Trucks](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/end-trucks.md) `(Standalone System)`
- [Hoist Unit](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hoist-unit.md) `(Standalone System)`
- [Trolley](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/trolley.md) `(Standalone System)`
- [Runway System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/runway-system.md) `(Standalone System)`
- [Control System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/control-system.md) `(Standalone System)`
- [Safety Devices](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/safety-devices.md) `(Standalone System)`
- [Operator Cabin](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/operator-cabin.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Electric Hoist**, **Crane Runway System**, **Industrial Power Supply Unit**  
**Downstream Applications**: Heavy Machinery Assemblies, Large Steel Fabrications, Industrial Equipment Modules  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in your bridge crane construction?
**A**: Our bridge cranes are constructed using high-grade structural steel and alloy steel components, ensuring durability and reliability for heavy industrial applications.

### Q: How do I determine the right duty class for my bridge crane?
**A**: Duty class (FEM/ISO) depends on your operational frequency and load intensity. We assess your usage patterns to recommend the appropriate class for optimal performance and longevity.

### Q: Can your bridge cranes be customized for specific facility requirements?
**A**: Yes, we offer fully customizable bridge cranes with adjustable span lengths, lifting capacities, travel speeds, and control systems to match your specific manufacturing facility layout and operational needs.

## 6. Manufacturing Compliance

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Bridge Crane](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/bridge-crane)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **8** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: BRIDGE_CRANE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: e1814c1b
