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  • Writer's pictureEngineering Division

Retrofitting Challenges: Adapting a PEB Structure for a 25 MT Crane


Retrofitting an existing Pre-Engineered Building (PEB) structure to accommodate a significantly larger load, such as a 25 MT crane, presents a unique set of challenges. This blog post will explore the design journey undertaken by our team at KTSC (Kalinda Technical Services and Consultancy) to meet the client's requirements while optimizing space and ensuring structural integrity.

Assessment of Existing Structure:

The first crucial step involved a comprehensive analysis of the existing PEB structure. Engineers carefully examined the original design, considering factors such as material strengths, column configurations, and load-bearing capacities. This assessment formed the foundation for understanding the limitations and potential enhancements needed.

Application of New Loads:

With the goal of introducing a 25 MT crane, engineers calculated the additional loads the structure would have to bear. This step required precise calculations and simulations to ensure that the existing structure could handle the increased weight and dynamic forces associated with the new crane.

Designing Stich Columns:

To support the increased load without compromising available space, the design proposed the use of stich columns. These columns seamlessly integrated with the existing structure, utilizing built-up sections to efficiently distribute the load. The challenge here was to design columns that provided the necessary support without encroaching on valuable operational space.


Strengthening Existing Structure:

Recognizing potential weak points in the existing structure, engineers implemented strengthening measures. This involved reinforcing critical areas susceptible to increased stresses due to the heavier crane. The objective was to ensure that the entire structure maintained its integrity and safety standards.

Crane Beam Modification:

Upgrading the crane beam to accommodate the 25 MT crane was a pivotal aspect of the retrofitting process. The new beam design had to seamlessly integrate with the existing structure, transferring loads efficiently and avoiding any adverse effects on the overall stability.

Hilti Chemical Anchors for Floor:

To secure the crane and maintain stability, engineers used Hilti chemical anchors for the concrete floor. This step involved careful consideration of the floor's load-bearing capacity and the optimal anchoring solution to withstand the dynamic forces exerted during crane operations.


Reaction Analysis and Validation:

Engineers conducted a thorough analysis of reactions to ensure that the retrofitting efforts met safety standards. This step involved validating the proposed modifications and verifying that the structure could effectively distribute loads and forces associated with the 25 MT crane.



The retrofitting of the PEB structure for the 25 MT crane presented a multifaceted challenge that demanded a holistic design approach. By strategically implementing stich columns, modifying the crane beam, and conducting thorough analyses, the engineering team at KTSC successfully met the client's requirements while optimizing space utilization. This project showcases the importance of innovative thinking and precision engineering in adapting existing structures to evolving industrial needs.

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