diff --git a/docs/digital-factory.md b/docs/digital-factory.md
index eff9c2f..500ab3e 100644
--- a/docs/digital-factory.md
+++ b/docs/digital-factory.md
@@ -519,7 +519,10 @@ Modules, in build order:
    IDs, dead-wax scribe text and fiducial applied, microscope check result.
 5. **Metal genealogy**: lacquer to father to mother to stamper, or bridged
    supplier plus batch; per-part metrology history; stamper lifecycle
-   (mounted on which press, play count, retired why), archive location.
+   (mounted on which press, play count, retired why), archive location
+   (box and shelf position in the mobile shelving,
+   [facility security](facility-security.md#archive-room-mobile-shelving)),
+   stamper sets grown per mother.
 6. **Materials**: PVC lots with the lab gate and CoA, regrind batches,
    label lots with print inspection and oven pre-dry, carton and sleeve
    lots with incoming QC.
diff --git a/docs/facility-security.md b/docs/facility-security.md
index bfa2b7d..8439e09 100644
--- a/docs/facility-security.md
+++ b/docs/facility-security.md
@@ -68,6 +68,80 @@ option per room.
   salts are hazardous. Locked storage, inventory tracking, and controlled
   issue to the galvanics team.
 
+### Archive room: mobile shelving
+
+Planned (October 2026): the archive in the office is fitted with **mobile
+archive shelving**, carriages on floor rails that close up into one block
+and open a single aisle where it is needed. The reference is A-Z
+Solutions' archive shelving (Vienna; fahrbare Archivregale,
+https://www.a-z-solutions.eu/buero-archiv/archivregale, checked October
+2026): hand wheel or electric push-button drive, optional front panels,
+lockable, and the vendor asks to be involved early because the rails set
+requirements on the floor and the room layout. Prices are not published.
+
+**What it holds.** The father and the mother of every side (decided
+October 2026, [galvanics](equipment/galvanics.md)): 4 parts per title,
+about 1,200 to 2,400 a year at full capacity, in protective sleeves,
+standing in labelled boxes. Also paper records that have to be kept as
+originals. A reference pressing of every title could go here too; that is
+a proposal, not decided.
+
+**Size, estimates.** A 12" father or mother grows on a 14" lacquer: about
+35 cm across, 0.25 mm thick, ~9.6 dm² ([plant
+operation](plant-operation.html) and galvanics figures), so about 0.2 kg of
+nickel. In a sleeve with a separator, assume ~3 mm of shelf per part:
+~330 parts and ~75 kg per shelf metre, on 400 mm deep shelves with ~400 mm
+clear height, five levels to ~2.2 m. In the Payap scenario's office the
+archive is a ground-floor room of about 4 × 5.75 m
+([site candidates](site-candidates.md)). With the rails along the long
+side it takes two fixed single-sided runs, four double-sided carriages
+about 3 m long and one ~0.9 m working aisle: ~150 shelf metres, roughly
+50,000 parts, which is 20 years or more of fathers and mothers at full
+capacity. Static shelving with an aisle between every pair of runs
+would hold about 60 % of that.
+
+**What it asks of the building.**
+
+- **Floor load.** Fully loaded, a double carriage carries about a tonne
+  per metre of length: ~11 kN/m² under the shelving block and ~6 kN/m²
+  averaged over the room (estimates), above an office floor. The archive stays on the ground slab, and
+  that slab keeps the full rating if the slab is zoned lighter under
+  offices ([phase 1 RFQ](finance/phase1-construction-rfq.md)).
+- **Rails.** Set into the floor screed during fit-out, or on a raised
+  floor ramped at the door, so the shelving layout and the rail positions
+  are fixed before the floor finish. Rail type, depth and floor flatness
+  tolerance come from the shelving supplier.
+- **Drive.** A geared hand wheel with an aisle lock is enough for a room
+  one or two people use and has nothing to fail; electric drive is an
+  option, not a need.
+- **The room around it** stays as above: clean-agent gas suppression
+  (the suppression designer confirms the agent reaches into the closed
+  carriage block), climate control with the archive in the tightest
+  monitoring tier ([digital factory](digital-factory.md)), a water-leak
+  sensor along the rails, lockable carriages behind the room's access
+  control.
+- **Locations.** Every box carries a barcode and every position an
+  address (carriage, face, level, slot); the factory application records
+  each part's archive location there, so a repress order says which box
+  to pull.
+
+**Open points.**
+
+- **Quotes:** A-Z Solutions and a Thai or regional mobile-shelving
+  supplier against the same spec (carriages ~3 m, five levels, 400 mm
+  shelves, at least ~100 kg per shelf level per metre, geared hand wheel
+  with aisle lock, central lock, rail embedding detail, delivery and
+  installation in Chiang Mai). Steel shelving shipped from Austria is
+  heavy, so the A-Z system is the reference spec rather than the default
+  buy.
+- **Storage format:** sleeves, boxes, passivation and humidity for
+  archived nickel parts, from the galvanics vendors
+  ([open questions](equipment/galvanics.md#open-questions-for-the-quotes)).
+- **Two compartments:** with fathers and mothers in one room, one event
+  can take both. Keeping the fathers (rarely pulled) in a second fire
+  compartment or off site, and the mothers (pulled for every repress) in
+  this room, would meet the off-site point above.
+
 ## Fire and life safety
 
 - **Fire detection and alarm** throughout; suppression matched to each zone
diff --git a/docs/finance/phase1-construction-rfq.md b/docs/finance/phase1-construction-rfq.md
index 45208a0..bee22d3 100644
--- a/docs/finance/phase1-construction-rfq.md
+++ b/docs/finance/phase1-construction-rfq.md
@@ -31,7 +31,11 @@ stepping up from a light-duty slab adds only on the order of 100–200 THB/m².
 The real cost variable is the ground underneath (see soil, below). A later
 value-engineering option is to zone the slab — 30 kN/m² under press hall and
 warehouse only, lighter under offices, but for rough pricing the whole
-floor is specified at 30 so the number is conservative.
+floor is specified at 30 so the number is conservative. If it is zoned,
+the archive room keeps the full rating: it gets mobile shelving loaded
+with nickel parts, about 11 kN/m² under the shelving when full (estimate), and
+its rails go into the floor screed at fit-out
+([facility security](../facility-security.md#archive-room-mobile-shelving)).
 
 ### 1a. Panel core: where PIR is not enough
 
diff --git a/docs/finance/total-investment.md b/docs/finance/total-investment.md
index 578bbf7..7aab36f 100644
--- a/docs/finance/total-investment.md
+++ b/docs/finance/total-investment.md
@@ -50,6 +50,7 @@ building, software and stamper prep lines, and the contingency on top).
 | Press fleet changed (October 2026) to two Newbilt Duplex systems (two presses each, EX 50 main extruder and EX 35 colour extruder) plus one Newbilt Classic, replacing the two blocks above (930k – 1,290k): Duplex system 1 as the first block (350k – 370k; the quote's second-extruder option becomes the EX 35), system 2 ~230k – 300k (two presses at the quoted ~115k per press and extruder set as the yardstick, plus hydraulic unit and EX 35, estimate; no EX 35 price on file), the Classic ~290k – 460k (the AD12 band per press as a placeholder; no Newbilt price on file) | −60k (low case) / −160k (high case) | −2.0M / −5.3M | estimate, [pressing line](../equipment/pressing-line.md); the Newbilt re-quote replaces it. The utilities for five presses are re-sized in the row below |
 | Utilities re-sized for the five-press fleet (October 2026): boiler bank 2 × 500 kg/h, chiller bank 3 × 250 kW with plate heat exchanger and tanks, larger softener and loop treatment ([steam and cooling](../steam-cooling.html)) | +185k (low case) / +294k (high case) | +6.1M / +9.7M | estimate, [utilities CSV](utilities-investment.csv) re-based from 24.0M – 41.6M to 30.1M – 51.3M THB |
 | Utility yard built for four boiler and four chiller modules (October 2026): yard ~379 m² against 178 m² ([scale](../scale.md#detached-utility-yard-parking-and-what-that-moves)) | 73k – 122k | 2.4M – 4.0M | estimate: the building rate above on the ~200 m² the yard grows by; the open chiller compound costs less than a building, so this is the cautious end. The valved branches and feeders for the empty positions are not priced yet |
+| Archive mobile shelving for the father and mother archive (October 2026) | to quote | to quote | not in the sum: A-Z Solutions publishes no prices; quote it and a Thai supplier ([facility security](../facility-security.md#archive-room-mobile-shelving)) |
 | **Added so far** | **~678k – 1,027k** | **~22.3M – 33.9M** | about 13 to 17% on the full-vision subtotal |
 
 ## Phased entry
diff --git a/docs/site-candidates.md b/docs/site-candidates.md
index 0b8f9f9..bbc2de4 100644
--- a/docs/site-candidates.md
+++ b/docs/site-candidates.md
@@ -224,7 +224,9 @@ and every equipment envelope is an estimate.
   - Ground floor, for staff and the studio: reception and lobby, a canteen
     for about 40 with its kitchen, changing rooms for women and men with
     four showers each, toilets, mastering and cutting with an inner
-    acoustic lining, the listening room and the archive. Staff change here
+    acoustic lining, the listening room and the archive (mobile shelving
+    on the ground slab, [facility security](facility-security.md#archive-room-mobile-shelving)).
+    Staff change here
     before crossing to the factory, whose staff entry keeps only PPE and a
     WC.
   - First floor: the offices (~150 m²), a meeting and training room (the
diff --git a/docs/suppliers/equipment-suppliers.md b/docs/suppliers/equipment-suppliers.md
index afcb1b5..02077ed 100644
--- a/docs/suppliers/equipment-suppliers.md
+++ b/docs/suppliers/equipment-suppliers.md
@@ -188,6 +188,12 @@ feeds the colour/splatter work the semi-automatic line is meant to serve.
   Thailand burning-season PM2.5 peaks; a major load for PV/battery sizing
 - Clean rooms, ventilation, decontamination infrastructure for galvanics
 - Fire protection, exhaust work benches, PPE stock
+- Archive fit-out: mobile archive shelving for the father and mother
+  archive. Reference: A-Z Solutions, Vienna, Austria (archive shelving,
+  hand wheel or electric drive, lockable; office.at@a-z-solutions.eu,
+  +43 1 718 42 48; price on request), quoted against a Thai or regional
+  mobile-shelving supplier; spec and sizing in
+  [facility security](../facility-security.md#archive-room-mobile-shelving)
 
 Thai supplier candidates and rough investment ranges for these utility and
 site systems are compiled in