Liftech Design Notebook

This document contains a summary of common structural fatigue details, tolerant and intolerant, along with an explanation of relative fatigue life for some common details based on BS 5400, BS 7608, and EN 1993-1-9:2005.

Experience is necessary but it is not sufficient to determine if the risk is acceptable. A structure that has not failed may or may not be on the verge of failure. Unexpected events happen. There is always some risk. Design criteria should be based on industry standard and on acceptable risk.

Liftech performed a time history analysis of seismic forces on an 800 t cement unloader. The video shows the computer model of the unloader on the wharf subject to earthquake forces. Based on results of the analysis, Liftech provided recommendations to improve the seismic performance.

The vulnerability of jumbo cranes to serious seismic damage is much greater than that of smaller cranes. This report presents the issues surrounding current design criteria and Liftech’s suggested criteria.

A brief history of various operator’s cab positions since 1959, and why design changes occurred.

Liftech standard structural details, showing typical unacceptable details and corresponding recommended acceptable details. These sheets form a standard appendix to Liftech specifications.

Type, capacity, performance, geometry, design crane loads, and design wharf loads of recent container cranes from various manufacturers for various Ports.

This report presents the design criteria and design loads for new crane girders at the Port of Oakland.

This drawing defines crane and wharf terms.

This drawing defines crane operating terms.