Novel Octagonal Central Frame Design Awarded with Trailer Innovation 2019

Kässbohrer is the winner of Trailer Innovation 2019 Awards in Chassis Category with its multifunctional container chassis. Designed with octagonal central frame, Kässbohrer prevents permanent damage compare to the industry standard rectangular central frame design.

Tags: Container Transport, Innovation, Intermodal, Occupational Health and Safety, the Box

The need for multifunctional container chassis that can transport all ranges of containers from 20 to 45 feet emerged 30 years ago. Whereas through multifunctional container chassis operational flexibility was targeted, today 100% of multifunctional container chassis are rectangular.

The problem with a rectangular central frame design is due to 90 degree angles of the rectangle is subject to torsional stress and bending moments. The results of this stress are damage to all welded parts including axle support beams, and suspensions. Furthermore, rectangular form creates a variety of torsional issues while performing telescopic functions leading to breakdowns most common in the industry including permanent damage of the vehicle.

Consequently, Kässbohrer’s octagonal central frame design stands out in the industry and has been awarded with Trailer Innovation 2019 in Chassis Category.

Kässbohrer octagonal central frame with 120 to 150 degree angles, enables reduction of all ancillary tension related to all welded components making the entire chassis as tension free as it gets, preventing permanent damage arising from regular operations that are carried out with the industry standard rectangular central frame design. Last but not least, the front, middle and rear extensions are carefully designed with locking mechanisms that provide the most user-friendly operation, even for the average driver.

Kässbohrer K.SHG AVMH provides solutions to the known problems in the multifunctional container chassis operations in 5 categories.


Operational Risk: Damage to the vehicle

Main Value added to the Owner: Longer vehicle life, increased total cost of ownership
Main Value added to the Driver: In extreme cases, accident prevention caused by vehicle damage during transportation
Main Value added to the Fleet Manager: Uninterrupted operations

The innovation of octagonal central frame design is the successful adaptation of widely used design in loading cranes to chassis. In the market 100 % of multifunctional container chassis operate with a telescopic rectangular central frame. During transport the chassis experiences normal stress due to uneven roads, bumps on the roads, side turns, as well as non-uniform distribution load. The stress exerted is normal and torsional.

In other semi-trailer chassis, the stress is distributed by the holistic structure of the upper body and the chassis. However in container chassis, the container placed on top of the chassis is rigid hence not aiding in the stress distribution presented due to normal road conditions. The stress on the chassis must be evened out by the chassis itself. The Rectangular central frame due to 90 degree angles of the rectangle is subject to torsional stress and bending moments. The results of this stress are damage to all welded parts including axle support beams, and suspensions. The octagonal central frame presents 120 to 150 degree angles. Hence the stress is distributed along the cross-sectional area, protecting all welded parts as well as axles presenting a risk free vehicle.


Operational Risk: Operation Difficulty and Damage to Vehicle
Main Value added to the Owner: Longer Vehicle Life, increased total value of ownership
Main Value added to the Driver: Hassle free operations
Main Value added to the Fleet Manager: Uninterrupted Operations

The multifunctional container chassis are designed to extend at front, middle and rear. The extension is enabled mainly by telescopic central frames. The rectangular central frames present operational problems when the extensions are needed to be performed in uneven road conditions. Due to 90 degree angles of the rectangular structures, the two structures often coincide during extension operations performed at angled surfaces, damaging the telescopic mechanism as well as surfaces and wearable parts necessary for the operation. In most cases the structures are stuck during operations and need dismantling to resume operation. The octagonal central frame with 120-150 degree angles performs as easily on angled road conditions as well as flat surfaces. By way of design, the usual vehicle damage is averted.

The octagonal central frame enables easier extension operations since the wider angles of 120-150 at 5,2 Meters extension beam distributes the longitudinal tension along the central frame better than 90 degree rectangular frames. Therefore the drivers can more easily and efficiently use the chassis.

The risk of damage to the vehicle during normal operations is minimized therefore the fleet operators can execute their intended transportation plans without service interruptions.



Operational Risk: Damage to Vehicle
Main Value added to the Owner: Longer Vehicle Life, increased total value of ownership
Main Value added to the Fleet Manager: Uninterrupted Operations

The octagonal central frame design innovation enables stress distribution on all welded parts and components hence contributing to permanent damage risk reduction of the chassis overall.

Firstly, due to external angles of 150 degrees of octagon, the available surface for welding is increased by 66% compared to rectangles of equal size. Therefore welding can be applied to a larger surface at greater angles leading to distribution of stress exerted on the metal during normal operations hence making the chassis stronger overall and more risk free in terms of damage.

Secondly, the surface of the octagon is larger than a rectangle of equal size, therefore the overall torsion on the central beam is distributed at a larger surface, again contributing to the decreased bending forces.

Overall, the stress is distributed more evenly on the octagonal center frame chassis, leading to the reduction of the risk of damage to the vehicle, hence prolonging the life of the vehicle as well as leading to reduced service needs and continuous operations


Operational Risk: Interruption of Operations, Longer Service Time
Main Value added to the Owner: Increased total value of ownership
Main Value added to the Fleet Manager: Planned Efficient Operations

Multifunctional chassis presents problems with electrical and pneumatic wiring installation. During transport in the unloaded state, the wiring installations faces damage due to vertical acceleration by way of grinding against the chassis or vibration of plastic pipes and cables on chassis parts. K.SHG AVMH’s innovative design is complete in addressing wiring problems present in other chassis. The wiring is buffered in frame passages and corrugated pipe inserts are used to compliment the exponential advantages that are presented by the octagonal central frame chassis innovation. This extra work on electrical systems are put in place to guarantee 100% operational continuity even at the most minute detail.

The electric wiring from the front coupling plate to the rear of the octagonal main frame chassis is deliberately divided into three parts. Because there is the version with 45ft. front extension, an ISO 12098 intermediate coupling is mounted in front of the saddle-neck. From the neck to the rear, the second section is installed. Here, a telescoping stainless steel tube serves as a guide for the spiral-flex cables for electrical and pneumatic wiring. For the power supply of the rear extension, again an ISO 12098 coupling is mounted to the power distribution at the rear.

The divided design of the wiring at the front chassis, in the middle and at the rear enables for independent diagnosis of all three sections and present quick sectional repair if a damage to the wiring occurs. The sectional repair of the wiring reduces material costs during damage as well as reduced service time contributing to operational efficiency.


Operational Risk: Break problems
Main Value added to the Owner: Increased total value of ownership
Main Value added to the Driver: Prevention of accidents in extreme cases
Main Value added to the Fleet Manager: Continuous Planned Operations

1- Dual Pneumatic Locking Systems

Double sided locking system which is placed on the sides of the mid extension can be controlled over the vehicle. This user friendly and easy to operate feature makes sure the extension is fixed during the operations.

2- Patented Front Extension

Kässbohrer -patent secured- front extension part have user friendly and operationally safe design which helps the drivers easy to operate the extension mechanism and makes them understand when the front extension is locked by giving out a sound.

3- Metallization

Even though all the chassis is coated with KTL, partial metallization is applied as standart to the contact area between the container and the chassis.

Metalization is the application of a Zn / Al metal layer on the chassis before painting which provides the best corrosion resistance up to 20 years. This is a proven method which is resistant to 2.000 hrs long salt-spray /corrosion test. Other features of metalization are well known strength to impact and also protection for mechanical damages.

Related Solutions

  • LINK
    Engineering Excellence, Long Curtainsider, Project Management, Road Train

    Kässbohrer delivers 15.5 m long curtainsiders to Dubai

    Country - Product Group
  • LINK
    ADR Regulation, Eurobitume, Safety, Trailer Innovation, Winner

    A fine industry collaboration wins the Trailer Innovation 2017

    Partnership - Product Group
  • LINK
    aftersales, customer service, load factor, operational excellence

    Customer service beyond borders: Partnership with TIP Trailer Services

  • LINK
    Heavy Haulage, Innovation, low bed, Self-steering

    Steer by Brake: Simplifying the steering operation

    Mode of Transport - Partnership
  • LINK
    Curtainsider, digital trailer control, Innovation, Safety

    Digital Trailer Control to increase safety for curtainsider operators

    Mode of Transport - Partnership
  • LINK
    Fleet Management, Knowledge, Management, Telematics

    Trailer Telematics

  • LINK
    ADR Regulation, Chemical Tanker, Electronic System, Intermodal Transportation

    Dangerous Goods Transportation with Safety Systems

    Mode of Transport