Practical planning guide

No-Overhang Models and Measured Loads: Use the Finished Footprint Next

Distinguish a case arrangement inside the pallet rectangle from a measured finished load that may have larger outside dimensions.

Reviewed: 1 October 2026

Decide which rectangle belongs in the next calculation

A case layer can fit within a nominal pallet rectangle while the finished wrapped load has a larger footprint. The first result answers where the bare case rectangles fit. The next floor plan must use the object that will actually be moved. Keeping those boundaries separate avoids a common mistake: using a correct pallet-layer result as though it also measured the completed load.

The layer engine does not authorize case overhang. Its validator requires every placed rectangle to stay inside the usable boundary after clearance. That is a geometric rule, not a structural argument about whether a protruding carton would be supported. If an operation proposes overhang, it needs an appropriate separately reviewed physical plan; extending the base dimensions merely to make a diagram fit changes the geometric question.

Compare a nominal footprint with a hypothetical measured one

Assume cases have been planned on a 1200 by 800 mm base. A hypothetical completed load is then measured at 1220 by 820 mm because outside protection or protrusions extend its envelope. This article does not predict a twenty-millimetre allowance. The two larger dimensions are stated measurements for the exercise. Record them as the finished footprint rather than subtracting them because the base still has its nominal dimensions.

On a fictional 2400 by 1600 mm floor, four nominal 1200 by 800 rectangles fit exactly as two columns and two rows. With 1220 by 820 measured rectangles, the same engine returns two placements, best found, with an area upper bound of three. This run demonstrates two valid positions, not proof that a third is impossible. The floor quantity has changed because the moved object is larger.

One fictional floor, two object boundaries
Planning objectEntered footprintReturned floor countArea ceilingStatus
Nominal pallet rectangle1200 by 800 mm44Optimal
Hypothetically measured finished load1220 by 820 mm23Best found

Reproduce the floor comparison with declared dimensions

Use the nominal-footprint floor comparison and the measured-footprint comparison. The container preset only enables the floor planner; the edited 2400 by 1600 dimensions define this fictional floor and are not a twenty-foot-container specification.

The main calculator also uses its pallet fields for a case preview. In the second link those fields deliberately represent the finished floor object. Do not adopt its case preview as a new packaging specification on a 1220 by 820 base. Retain the original case-layer record separately. Shared fields can serve different stages, so identify which result panel the comparison concerns.

Check how the envelope was measured

Measure maximum outside length and width of the packed object, including normal projections that matter to fit. State whether the record is an actual observation, a supplier envelope, or an estimate awaiting assembly. A tight nominal model should not erase a known protrusion. Conversely, a measured envelope includes empty space in its bounding rectangle and does not imply that material occupies every point inside it.

If the protrusion differs by side, this identical-rectangle floor model still uses one bounding rectangle. It does not nest irregular shapes or exploit a recess between neighboring loads. Whether that conservative rectangle is the appropriate representation depends on the operational task. Keep the shape limitation visible when reviewing the proposed positions.

Carry measured height into cube and access checks

Suppose the final object's total height is hypothetically measured at 1410 mm. Its envelope cube is 1.22 times 0.82 times 1.41 = 1.410564 cubic metres. Enter that complete envelope in Known Loaded Dimensions. The cube tool does not infer the case count or a permissible overhang from the measured dimensions.

Include the base once if the height already describes the whole object. Check the actual assigned opening separately, including any relevant approach or handling constraints. A floor arrangement inside an interior rectangle does not prove the object can enter it. Nor does a cube smaller than an equipment's interior volume prove floor fit, because dimensions and shape control placement.

Keep load enlargement separate from wall clearance

The measured 1220 by 820 rectangle belongs to the load. A requested wall clearance belongs to the next floor boundary. They are separate inputs even if both reduce the useful count. Applying only one cannot represent the other. First enter the complete load envelope, then the required floor allowances, and inspect that combined result.

Preserve the nominal model instead of rewriting history

The original layer result remains useful: it documents the intended case geometry before protection or assembly changed the envelope. Save the later measurement as another record with its basis and date. That distinction helps identify whether a difference came from changed case dimensions, an additional component, or an earlier assumption that did not represent the finished load.

When an order has several envelope groups, calculate each group separately. A partial pallet may be lower but have the same protruding footprint. An average width or height can hide the load that fails a boundary. The current floor engine arranges one identical rectangle type per search, so separate group results are not a validated joint mixed-envelope plan.

Boundary handoff record

Original base footprint: 1200 by 800 mm. Original case model: rectangular outside cases, no overhang. Later hypothetical finished footprint: 1220 by 820 mm. Total measured height: 1410 mm, including base. Fictional next floor: 2400 by 1600 mm, zero gap and wall clearance, rotation allowed. Nominal floor result 4 optimal; measured result 2 best found with upper bound 3. Store the case-layout record, measurement record, and floor result separately.

The next planner should receive the finished object dimensions alongside the original layer specification. The methodology explains model boundaries; the measurement record resolves which boundary applies to the physical shipment being checked.

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