Production hall: rough BIM layout sketch

FreeCAD BIM (Arch) sketch of the 60 x 25 m phase 1 hall:
Building > Ground floor with Spaces for every zone (areas computed),
room-in-room partitions, the fire wall at 48 m, the 5 t crane runway,
and the main equipment as BIM Equipment (Pheenix line, Sibert row,
Newbilt Duplex and two Classic presses, silos, racking). Zones run in
process order along the visitor corridor. Top-view PNG alongside.
Linked from the README and from the crane doc, with the one conflict it
shows: reception and cutting room under the crane travel.

docs/crane-workshop-tours.md

@@ -285,6 +285,18 @@ window or not at all. The concept drawing
 and the detached utility yard and does not yet follow this order; it
 needs redrawing at the next layout pass.
 
+A first rough pass that does follow it is the BIM sketch
+[production-hall-layout-sketch.FCStd](production-hall-layout-sketch.FCStd)
+(top view: [PNG](production-hall-layout-sketch.png), October 2026): ramp
+end with machine door, workshop and spares; then mastering, galvanics,
+stamper prep, PVC lab and material area, the press hall, inspection, QC
+and packaging along the corridor; the fire wall at 48 m and the warehouse
+and dispatch at the dock end, with a 4.5 m crane and forklift aisle along
+the back wall from the machine door to the fire wall. It shows one
+conflict to resolve: with the workshop at the ramp end, reception and the
+cutting room sit under the bridge's travel too, against point 6 above
+(cutting room outside the crane zone).
+
 ### How it is built
 
 - **Room-in-room**: a glazed wall on the production side, a solid roof at