Test Report on an Anchor Fitting for ISO-Type Corner Castings

摘要

This report addresses the development of a removable anchor that can be insertedinto an ISO corner casting to convert it to a load-certifiable attachment point. This development was undertaken as part of a design for sea state 3 lighter connectors, specifically for the marriage bridle rigging. The ISO anchor was developed in consideration of the following characteristics: minimum ultimate strength of 90,000 pounds and a safe working load (SWL) of 15,000 pounds with a safety factor of 6; load to be applied along the deck in shear and at various radial angles relative to the ISO comer casting; installable in less than 5 minutes by one person using only hand tools. A concept resulted in a threaded insert that has the potential of being used for hoist ring attachments as well as any equipment or operation that requires a robust, quickly installed anchor point. This report describes the concept evolution through three prototype stages, documenting the load testing, fit and function of each variation. The final design is being incorporated into the deck rigging parts list for the sea state 3 connector Logistics Engineering Advanced Demonstration.