Wind loading of structures is a complex phenomenon and a major consideration when ensuring the safety and design of industrial assets. This article aims to investigate the historical changes to Australian wind loading standards and the rationale behind them.
Standards Australia recently published the latest edition of AS 4324.1 Mobile equipment for continuous handling of bulk materials. It was recognised that AS 4324.1 is very important in the procurement process for this equipment and this needed further emphasis.
Design aspects of crane rail and wheel selection for materials handling machines and cranes are covered in Australian Standard AS1418. This article provides guidance on the appropriate selection of rails, rail joints and rails restraints for the safe and efficient operation of a crane or machine.
Even though the damaged structure may appear to be intact, the ability to resist earthquake loads, wind loads and other abnormal loads is severely reduced and catastrophic failure may result without warning.
In contrast to previous revisions, AS4324.1-2017 states that the standard should be used to risk assess existing machines for continued use, upgrades or modification. This clarifies the importance of AS4324.1 compliance for existing machines and may impact current risk management strategies, systems and procedures for these machines.
The P-F curve is a common representation of an assets life cycle based on the concept of the relationship between “Potential Failure” (P) and “Functional Failure” (F). Typically, P-F curves have been used to assist reliability analysis of mechanical equipment such as pumps, drives, bearings etc. However, the concept of the P-F curve can be applied to any asset. ASPEC frequently utilise P-F curves as a useful tool to communicate information regarding asset condition and status within the asset lifecycle.
Welding and fabrication defects can greatly affect the performance and longevity of steel structures. Having an understanding of the various defects, their causes and remedies can help to ensure higher-quality and longer lasting structures.
This article provides a high level summary table of changes in the AS4324.1-2017 standard and likely implications for new and existing machines.
Materials handling machines are complex structures which often rely on load limiting devices to prevent damage. Fatigue damage is a consideration for machines of this type.