Module Layout Calculator

Enter the storage volume your AHJ calculation produced. This tool converts it into modules, layers and footprint. It does not calculate required volume — that is your jurisdiction’s hydrology, not ours.

Required storage volume

Unit

Module height

Layers

Estimated Layout Specifications

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Modules required

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Tank footprint (plan area)

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Tank body depth (excl. bedding & cover)

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Storage-zone envelope

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40’HQ containers (341 m³ envelope each)

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Envelope a 40% void gravel trench would need

Footprint assumes a 1000 × 500 mm module grid and no perimeter working space. Depth is layers × module height; add bedding, cover depth and any pipe connecting box below. Container count is envelope volume divided by 341 cubic metres of assembled envelope per 40’HQ, rounded up, and excludes accessory wood cases.

Send these numbers to our engineering team