Add site massing model for the Mueang Chi candidate parcel

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Models the plot and everything on it in FreeCAD, and writes up the
decisions the modelling forced.

Parcel geometry is traced from the DOL LandsMaps cadastral polygon and
reconciled against that portal's own measured edge lengths (40.86 + 26.61
/ 166.81 / 42.48 + 14.94 / 152.46 m), which the trace reproduces to within
about 1% with 1.67 m of closure error over a 444 m perimeter. Note the
mapped extent comes out near 9,570 sqm against a deed area of 8,266 sqm,
a ~16% gap that needs a surveyor before any offer.

On the site: 60x25 m production building on a 10 degree monopitch, a
45x38 m phase-2 building, roof and carport PV, fire and raw water tanks,
a detached boiler/chiller utility yard, perimeter wall and gate, guard
house, roofed staff parking, and the loading and fire-access roads.

Docs:
- scale.md: expansion headroom for a second building, and the detached
  utility yard, which frees ~126 sqm inside the main shed
- sustainability.md: roof orientation study (rotating the building for
  solar gains under 1 point and costs 4 m of clearance, so it stays
  aligned to the plot), and a new water supply section
- facility-security.md: fire water supply behind the existing
  suppression design

Figures marked as estimates are planning-grade, not engineering
calculations; the PV module spec is a generic placeholder, and zoning for
factory use on this plot is still unverified.

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grabowski committed 2026-07-29 23:00:09 +07:00

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commit c4d0e08c9f

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docs/factory_building_rough.FCStd

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