A Comparative Assessment of the Scantling Rules for Indonesian Wooden Fishing Boats: ISO 12215-5:2008 and BKI Wooden Boat Regulation (2006)
Received: 24 June 2025 | Revised: 10 September 2025 and 23 September 2025 | Accepted: 24 September 2025 | Online: 8 December 2025
Corresponding author: Sunardi
Abstract
In this study, ISO 12215-5 load-resistance methods were applied using measured properties of Indonesian hardwoods to optimize scantlings for traditional wooden fishing boats, with the results benchmarked against BKI (2006) rules. Six commonly used tropical species were analyzed, and scantlings were computed on a dataset of 74 designs and 27 operational vessels, incorporating density and durability considerations. Compared with BKI's geometry-based formulas, ISO's stress-based approach produced leaner yet compliant scantlings and a repeatable species-sensitive workflow. The practical impact includes density-corrected improved compliance for keels and shelves, and a clarified procedure for integrating the durability class into the safety margins for tropical service. The findings support aligning the national practice with ISO's load-resistance framework while calibrating margins to indigenous timber behavior.
Keywords:
scantling optimization, ISO 12215-5, BKI 2006, wooden fishing boats, tropical hardwoods, density correctionDownloads
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