Truck Chassis for Crane Applications | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Truck Chassis

Definition

In a truck crane system, the chassis serves as the foundational structural platform that bears the weight of the crane superstructure, engine, cab, and payload. It distributes operational stresses and provides rigidity for safe lifting operations, while also housing the suspension, steering, and drivetrain systems essential for mobility. The chassis is typically constructed from high-strength low-alloy steel (HSLA) to achieve the required strength-to-weight ratio. Key parameters include a rated load capacity of 10–40 tonnes, a wheelbase of 3600–6000 mm, a frame width of 800–1000 mm, a frame height of 250–400 mm, and a frame thickness of 6–12 mm. Material grades range from Q345B to Q690D per GB/T 1591. The chassis operates within a temperature range of -40°C to 60°C, with a torsional stiffness of 10–20 kN·m/deg, and a weight of 3000–8000 kg. Maximum speed is 80–120 km/h, and frame straightness is within ±1.5 mm/m per ISO 1101. These values are reference ranges and must be verified for the specific model and application. The chassis must be selected based on the crane's mounting dimensions, payload requirements, and operating conditions. Proper alignment and maintenance are critical to ensure safe operation and longevity. Always consult the legal manufacturer or supplier for model-specific specifications and compliance with applicable standards.

Working Principle

The chassis functions as a load-bearing frame, transferring the weight and dynamic forces from the crane boom, load, and other components through its longitudinal rails and crossmembers to the axles and wheels. Its design ensures torsional rigidity to maintain stability during lifting and while the vehicle is in motion. The frame's stiffness and strength are critical to prevent excessive deflection or fatigue failure under repeated loading. Proper torque on fasteners and regular inspection for cracks or deformation are essential to maintain structural integrity.

Common Materials

High-strength low-alloy steel (HSLA)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load Capacity	10–40 t	Maximum payload the chassis can carry.ISO 362
Wheelbase	3600–6000 mm	Affects maneuverability and load distribution.
Frame Width	800–1000 mm	Must match crane mounting dimensions.
Frame Height	250–400 mm	Determines stiffness and ground clearance.
Frame Thickness	6–12 mm	Thicker for higher load capacity.
Material Grade	Q345B–Q690D	Higher grade for strength and toughness.GB/T 1591
Max Operating Temperature	60 °C	Above this, material strength degrades.
Min Operating Temperature	-40 °C	Below this, steel becomes brittle.
Frame Torsional Stiffness	10–20 kN·m/deg	Critical for crane stability.
Chassis Weight	3000–8000 kg	Affects payload and fuel efficiency.
Max Speed	80–120 km/h	Limited by chassis and crane rating.
Frame Straightness	±1.5 mm/m	Ensures proper alignment of components.ISO 1101

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

Frame Rails (Longitudinal Members) Part
Primary longitudinal load-bearing beams that run the length of the chassis, supporting vertical loads and resisting bending.

Material: High-strength steel
Crossmembers
Transverse structural members that connect the frame rails, providing torsional rigidity and mounting points for components like the engine, transmission, and crane pedestal.

Material: Steel
Suspension Mounting Brackets Part
Attachment points on the frame rails for connecting the leaf spring or air suspension systems to the axles.

Material: Steel
Outrigger Mounting Pads Part
Reinforced areas on the frame designed to withstand the concentrated forces from hydraulic outriggers during crane stabilization.

Material: Reinforced steel plate
Axles
Carry the frame loads down to the wheels.
Wheels
Final ground contact of the chassis load path.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Truck Chassis.

Applied To / Applications

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

Truck Crane

View system integration details

Truck-Mounted Concrete Pump

View system integration details

Manufacturers of Truck Chassis

Manufacturer profiles associated with Truck Chassis.

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Frequently Asked Questions

What is the rated load capacity of a typical truck chassis?

The rated load capacity is typically in the range of 10–40 tonnes, but this depends on the specific model and configuration. Always verify with the manufacturer.

What material is commonly used for truck chassis?

High-strength low-alloy steel (HSLA) is commonly used, with material grades ranging from Q345B to Q690D per GB/T 1591. The exact grade should be confirmed for your application.

What are the operating temperature limits?

The chassis is designed to operate between -40°C and 60°C. Beyond these limits, material properties may degrade, so consult the manufacturer for extreme conditions.

How do I verify frame straightness?

Frame straightness should be within ±1.5 mm/m as per ISO 1101. Use precision measuring tools and consult the manufacturer for verification procedures.

Data Basis

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Preliminary Technical Classification

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pressure:	N/A (structural component)
other spec:	Payload Capacity: 5-50 tons, Axle Load: 2.5-12 tons per axle, Torsional Stiffness: 10-25 kNm/deg
temperature:	-40°C to +85°C

Truck Chassis

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards