Main Rails / Side Members: Thickness 6-20 mm

Component Specifications

Definition

Main rails or side members are the principal load-bearing longitudinal structural elements in a chassis system, designed to support the entire machine's weight, absorb operational stresses, and provide mounting points for other components. They serve as the foundational framework that determines the chassis's rigidity, durability, and overall structural integrity under dynamic and static loads.

Working Principle

Operate as the primary load path by distributing forces (compression, tension, bending, torsion) from the machine's superstructure and operational loads through their longitudinal geometry and cross-sectional design, ensuring structural stability and preventing deformation.

Materials

High-strength low-alloy steel (HSLA), ASTM A572 Grade 50 or equivalent; Aluminum alloys (e.g., 6061-T6) for lightweight applications; Carbon steel (e.g., A36) for general use.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	Customized to machine dimensions (e.g., 2-10 meters)
Thickness	6-20 mm
Cross Section	C-channel, I-beam, or box section
Yield Strength	≥345 MPa
Surface Treatment	Hot-dip galvanizing, powder coating, or primer

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

Standards

ISO 5817, DIN 18800-1, ISO 12944

Parent Products

This component is used in the following industrial products

Chassis

The chassis is the foundational structural component of a Reach Stacker, providing the rigid framework that supports the engine, transmission, cab, lifting mechanism, and counterweights.

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Engineering Analysis

Risks & Mitigation

Fatigue cracking under cyclic loads
Corrosion in harsh environments
Misalignment during assembly affecting structural integrity
Overloading leading to permanent deformation

FMEA Triads

Trigger: Inadequate material strength or poor welding
Failure: Crack propagation or fracture under load
Mitigation: Use certified materials, follow welding standards (e.g., ISO 5817), conduct non-destructive testing (NDT)

Trigger: Exposure to corrosive elements without protection
Failure: Reduced cross-sectional area and strength due to corrosion
Mitigation: Apply protective coatings (e.g., galvanizing), use corrosion-resistant alloys, implement regular inspections

Trigger: Improper design or overloading
Failure: Excessive deflection or buckling
Mitigation: Conduct finite element analysis (FEA) during design, adhere to load ratings, include safety factors

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerance ±2 mm per meter length; straightness tolerance ≤3 mm over full length

Test Method

Ultrasonic testing for weld integrity, load testing to 150% of rated capacity, corrosion resistance per ISO 12944

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Main Rails / Side Members

Manufacturer profiles associated with Main Rails / Side Members.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of main rails in a chassis?

To serve as the primary longitudinal load-bearing structure, distributing operational forces and supporting the machine's weight and components.

Can main rails be replaced or repaired?

Yes, but replacement requires precise alignment and welding to maintain structural integrity; repairs often involve reinforcement or section replacement.

What materials are commonly used for main rails?

High-strength steel (e.g., HSLA), aluminum alloys for weight reduction, or carbon steel, chosen based on load requirements and environmental conditions.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Main Rails / Side Members