Tanktop Load • Local Bearing • Dunnage Line Load • Coil Geometry • Steel Mass Cross-Check • Securing • Loading Plan

Steel Coil Loading, Tanktop Strength & Dunnage Tool

Screen steel-coil stowage against the vessel's approved tanktop and local loading limits, estimate dunnage contact pressure and line load, cross-check coil mass from geometry, test a simplified securing-force case and identify the controlling structural zone before loading.

Figures represent
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Need much more depth? Click Advanced above.Advanced adds mixed coil rows, geometry/mass checks, tanktop zones, concentration factors, timber bearing stress, securing forces, crane SWL, rework costs and loading-readiness checks.
Fast10 primary inputs
Core answerAverage + local + line-load screen
VisualTanktop utilization + dunnage load path

Single Coil Block

Simple mode assumes uniform load sharing among bottom-tier support positions. Use Advanced if upper-tier geometry, mixed coil weights or local structural zones create unequal support loads.

tonnes.
m² used for approved average tanktop loading.
t/m² vessel-specific approved limit.
mm.
m of the timber actually participating in the load path.
t/m².
t/m of loaded support line.

Vessel & Approved Structural Basis

Enter limits from the approved loading manual, steel-coil loading plan, class-approved calculation or other vessel-specific structural information. No universal steel-coil tanktop limit is assumed.

t/m².
t/m².
t/m.
t. 0 disables this gate.
m.
m.
Planning reserve only. It does not change the approved limit.
Applied to average mass carried by each bottom-tier support position.

Mixed Coil / Structural-Zone Register

Model mixed coil sizes and different structural zones separately. A row name is for on-screen use only and is never sent in Tool Data.

Row / zoneBottomUpperCoil tOD mmID mmWidth mmZone L mZone B mDunnage linesBoard width mmBearing length mLocal limit t/m²Line limit t/m

Dunnage, Timber Bearing & Coil Geometry

MPa. Enter a verified material/design value. 0 disables the timber gate.
mm.
mm. 0 disables.
m per board.
t/m³.
Ship Universe planning flag only.
selected currency/m³.
%.

Simplified Securing-Force Screen

This is intentionally not a duplicate of the full Ship Universe Cargo Securing & Lashing tool. Enter effective securing-device capacities after all MSL/CS/angle/connection reductions from the approved CSM or cargo engineering.

t represented by the end block / securing group.
g from approved CSM / engineering.
g.
g used to reduce friction in this screen.
kN after all applicable reductions.
kN.

Handling, Stowage & Documentation

t. 0 disables handling gate.
% above declared heaviest coil mass.

Dunnage / Rework Cost Exposure

selected currency/t for illustration only.
%.
selected currency/day.
hours.
Engineering limitation: this tool does not calculate the actual strength of tanktop plating, floors, girders, hopper structures, welds, foundations or dunnage bending. It does not replace the approved loading manual, class-approved steel-coil plan, loading computer, Cargo Securing Manual, naval architect, surveyor, stevedore plan or the Master's judgment.
Regulatory / operating basis: SOLAS chapter VI covers stowage and securing of cargoes requiring special precautions. The IMO CSS Code provides the cargo-stowage and securing framework, and Annex 6 addresses coiled sheet steel stowed on the round. Conventional guidance calls for bottom stow where possible, athwartship dunnage, fore-and-aft coil axes, close stowage, wedges/chocks as needed, and properly secured upper tiers and voids. Vessel-specific approved structural limits and the Cargo Securing Manual always control.
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