I am designing a runabout and wanted to know the reinforcement requirements for a boat of 4m x 1.6m. Can anyone suggest any thread or recommend any classification rules which mention the frame spacing? This is for a fiberglass boat construction.
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As far as I know, by now nearly all class rules are demanding the use of ISO 12215 for scantling of small pleasure boats, so I am afraid you will have to get a copy of ISO standards.Since I do not have any ISO standards, can anyone suggest DNV, ABS, RINA or IRS class rules for small boat scantlings. Based on IRS class, the bottom plate thickness is calculated as 9mm. Is this very conservative? Can you suggest the transverse frame spacing usually used in small boats?