Topan Firmandha, Sony Anggara, Sunardi
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. © (2025), (Dr D. Pylarinos). All rights reserved.
Research and Development Division, PT. Biro Klasifikasi Indonesia (Persero), Jakarta, 14320, Indonesia; Department of Fisheries and Marine Utilization, Universitas Brawijaya, Malang, 65145, Indonesia
