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Hem Corner Bulk Layer Count Tool

Count an ideal untrimmed rectangular cross-fold stack as the product of the two layer counts.

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Description

Multiply layer counts, subtract their maximum for extra layers, and multiply product by thickness.

A pattern's seam and closure dimensions combine finished lengths with allowances, overlaps and offsets. A local length budget describes an ideal construction; fabric thickness, movement and fitting can change the practical result.

Multiply layer counts, subtract their maximum for extra layers, and multiply product by thickness.

When to use this tool

Use Hem Corner Bulk Layer Count when you need a local pattern, seam or closure dimension check.

How to use the tool and how it works

  1. Enter horizontalLayers, verticalLayers, fabricThickness. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read overlapLayers, extraLayers, stackThickness. Use the output convention below.

Require positive integer horizontal/vertical layers and nonnegative thickness. Multiply layer counts, subtract their maximum for extra layers, and multiply product by thickness.1

Input fieldMeaning and unitsAccepted input
horizontalLayersHorizontal LayersRequired. Safe integer; minimum 1.
verticalLayersVertical LayersRequired. Safe integer; minimum 1.
fabricThicknessFabric ThicknessRequired. Finite number; minimum 0.
Output fieldInterpretationReturned shape
overlapLayersProduct of the two supplied layer counts under this prescribed stack model.Required. Safe integer.
extraLayersExtra LayersRequired. Safe integer.
stackThicknessStack ThicknessRequired. Finite number.
json
{
  "input": {
    "horizontalLayers": 3,
    "verticalLayers": 3,
    "fabricThickness": 0.5
  },
  "output": {
    "overlapLayers": 9,
    "extraLayers": 6,
    "stackThickness": 4.5
  }
}

Limitations and assumptions

  • This prescribed multiplicative stack model is not a universal fold-construction count. Compression, seam geometry and actual sewing suitability are not verified.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Check the complete pattern and make an appropriate sample in the intended material. Review seam construction, allowances, shrinkage and fitting rather than treating one margin as complete garment validation.

References

  1. Calculation and input contract: fashion/hem-corner-bulk-layer-count — tool.io

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