Grain Code 2026 Amendments: Bulk Carriers New IMO Regulation

QUICK ANSWER

The International Grain Code adds a fourth optional loading condition effective 1 January 2026 via MSC.552(108). The new condition — "specially suitable compartment, partly filled in way of the hatch opening, with ends untrimmed" — formally recognises an intermediate stowage pattern that avoids time‑consuming end trimming when cargo inside the hatch reaches the end beam level. Operators intending to use this pattern must update grain loading manuals and loading computers and obtain classification/flag approvals before the enforcement date.

CURRENT LOADING CONDITIONS

Historically, the Grain Code defines three loading scenarios: filled and trimmed, filled and untrimmed, and partly filled (assumed trimmed). Practical loading often produced holds partly filled up to the hatch end beams where manual trimming outside the hatch is impractical. The omission of explicit rules created uncertainty: if ends were not trimmed, actual voids could exceed those assumed in stability calculations, increasing grain‑shift risk.

THE NEW FOURTH CONDITION

MSC.552(108) clarifies when specially suitable compartments may be loaded without trimming ends. Key criteria include: compartments must be classed as "specially suitable", be filled to a level at or above the bottom edge of the hatch end beam, maintain a level free surface in the hatch opening, and not be trimmed outside the hatch periphery. The amendment also prescribes when the condition is inapplicable, protecting safety margins.

CALCULATION AMENDMENTS

Part B receives targeted updates for heeling moment calculations. The code standardises surface slope assumptions: a nominal 30° slope is used from the lower edge of the hatch end beam, with an after‑shift angle of 25° and a vertical shift multiplier of 1.12 applied to transverse moments. Feeding holes and local surface irregularities are treated with defined rules so societies can produce repeatable heeling moment curves for each hold.

OPERATIONAL BENEFITS

Permitting untrimmed ends in qualifying holds reduces berth time, cuts manual labour and improves turnaround, offering commercial advantages for grain trades. Importantly, the new condition requires that stability be verified against larger natural voids, so acceptance of the method depends on documented, approved calculations rather than informal practice.

APPLICABILITY AND REQUIRED ACTIONS

Entry into force is 1 January 2026 (mandatory for newbuilds with keel laid on/after that date). Existing vessels wishing to use the condition must update grain loading manuals, prepare addenda, and submit revised heeling moment curves and loading computer updates to their classification society and flag state for approval before use. Early submissions are strongly recommended to avoid approval bottlenecks.

BOTTOM LINE

MSC.552(108) brings clarity and operational efficiency but shifts responsibility to operators to validate stability with the new assumptions and obtain formal approvals. Update manuals, amend loading software, and engage your RO early to benefit safely from the new stowage option in 2026.