Editorial Technical Reference

Mast/Column

This page explains how Mast/Column is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The vertical structural support component of a jib crane that provides stability and load-bearing capacity.

Product Specifications

Technical details and manufacturing context for Mast/Column

Definition
In a jib crane system, the mast/column serves as the primary vertical structural element that supports the horizontal jib arm and the hoisting mechanism. It transfers the load from the jib and lifting equipment to the foundation, ensuring stability during lifting operations. The mast/column is typically fixed to a base or foundation and may be designed as a single column or a lattice structure depending on the crane's capacity and application requirements. This component is essential for the safe operation of the crane, as it must withstand both compressive forces and bending moments induced by the offset load. The mast/column is usually manufactured from structural steel or high-strength alloy steel, with material grades such as Q235B to Q355B, and is designed to meet specific load and height requirements. Key parameters include rated capacity (0.5–20 t), height (3–12 m), diameter (200–600 mm), wall thickness (8–20 mm), and weight (500–5000 kg). The component is subject to surface treatment (blast cleaning to Sa2.5) and coating (dry film thickness 80–120 μm) to ensure corrosion resistance. Tolerances for straightness and diameter are specified per ISO 2768-1. Operating temperature range is -20°C to 60°C, with low-temperature steel required below -20°C. Wind load and seismic resistance are considered per ISO 4302 and GB 50011, respectively. The mast/column must be verified against the specific crane model and application, and all values should be confirmed with the legal manufacturer or supplier.
Working Principle
The mast/column functions as a compression member that resists vertical loads from the jib arm and hoist, as well as bending moments caused by the offset load. It provides the necessary rigidity to prevent excessive deflection during lifting operations, maintaining the crane's structural integrity and operational safety. The component transfers loads to the foundation, ensuring stability. Its design must account for material strength, cross-section geometry, and connection details to avoid buckling or fatigue failure.
Common Materials
Structural steel, High-strength alloy steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Capacity0.5–20 tMaximum load at specified outreachISO 4301-1
Height3–12 mCustomizable per installation
Diameter200–600 mmDepends on capacity and height
Wall Thickness8–20 mmStructural integrity
Material GradeQ235B–Q355BYield strength 235–355 MPaGB/T 1591
Surface TreatmentSa2.5Blast cleaning before paintingISO 8501-1
Coating Thickness80–120 μmDry film thicknessISO 19840
Tolerance (Straightness)±0.5 mm/mPer meter lengthISO 2768-1
Tolerance (Diameter)±1 mmMachined surfacesISO 2768-1
Operating Temperature-20–60 °CBelow -20°C use low-temp steel
Wind Load0.5–1.0 kN/m²In-service wind speedISO 4302
Seismic Resistance8 degreeSeismic intensityGB 50011
Weight500–5000 kgDepends on size and capacity

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Column Structure
    The column itself: carries the load and provides the vertical reference.
  • Base Plate Part
    Provides connection interface between mast/column and foundation
    Material: steel
  • Jib Connection Bracket Part
    Interface for attaching the horizontal jib arm to the mast/column
    Material: steel
  • Reinforcement Ribs Part
    Additional structural elements to enhance column strength and stability
    Material: steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Mast/Column.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (structural component, not pressure vessel)
other spec: Max vertical load: 1-50 tons (depending on design), Max horizontal force: 10-30% of vertical load, Deflection limit: L/500 to L/1000
temperature: -40°C to +80°C (standard steel), -60°C to +150°C (special alloys)
Media Compatibility
✓ Indoor manufacturing environments ✓ Outdoor industrial yards with standard coatings ✓ Corrosion-controlled chemical plants
Unsuitable: Marine/saltwater splash zones without specialized corrosion protection
Sizing Data Required
  • Maximum vertical load (including dynamic factors)
  • Required height/clearance under hook
  • Foundation/anchoring conditions (soil type, base plate design)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic loading from wind, operational vibrations, or dynamic loads leading to crack initiation and propagation at stress concentrators like welds, bolt holes, or geometric transitions.
Corrosion-induced structural degradation
Cause: Exposure to environmental elements (moisture, salt, chemicals) causing localized pitting, general corrosion, or stress corrosion cracking, particularly in unprotected or poorly maintained areas.
Maintenance Indicators
  • Visible cracks, deformations, or excessive rust/scale buildup on the mast/column surface
  • Abnormal vibrations, swaying, or audible creaking/groaning during operation or under load
Engineering Tips
  • Implement regular non-destructive testing (e.g., ultrasonic, magnetic particle inspection) at high-stress areas and welds to detect early-stage cracks or corrosion.
  • Apply and maintain protective coatings (e.g., galvanization, epoxy paints) and ensure proper drainage to prevent water/contaminant accumulation, especially at joints and base connections.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ANSI/ASME B30.3 - Construction Tower Cranes DIN 18800-1 - Steel Structures - Design and Construction

Quoted from the published standard.

Manufacturing Precision
  • Vertical Alignment: +/- 0.1 degrees
  • Wall Thickness Uniformity: +/- 5% of nominal thickness
Quality Inspection
  • Ultrasonic Testing (UT) for weld integrity
  • Load Testing to 125% of rated capacity

Manufacturers of Mast/Column

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

SINOLIFT EQUIPMENT CO., LTD.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Mobile mast column Aerial Work”
View source page ↗ sinolift.com · checked 2026-08-28

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What is the primary function of a jib crane mast/column?

The mast/column is the vertical structural element that supports the jib arm and hoist, transferring loads to the foundation and ensuring stability during lifting operations.

What materials are commonly used for the mast/column?

Typical materials include structural steel and high-strength alloy steel, with grades such as Q235B to Q355B, as listed in the directory.

What parameters should be verified before selecting a mast/column?

Key parameters include rated capacity, height, diameter, wall thickness, material grade, surface treatment, coating thickness, tolerances, operating temperature, wind load, seismic resistance, and weight. These must be confirmed for the specific crane model and application.

How is the mast/column protected against corrosion?

The component is typically blast cleaned to Sa2.5 and coated with a dry film thickness of 80–120 μm, per ISO 8501-1 and ISO 19840, respectively.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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