ZT Tosha — The Inherited Throne

Technical Specification — Permanent Installation

Title	The Inherited Throne
Artist	ZT Tosha
Year	2026

Revision Notice

This is a full specification revision, superseding all prior versions. Three changes from the original specification: (1) the sculptural shell changes from FRP composite to layered bronze-resin composite (~70% bronze content by weight) over a steel frame, finished in a patinated matte surface; (2) the twisted center bridge module (B1) is retained but substantially reduced in scale — a small connective form (approx. 40 × 40 × 50 cm) where the two bulbous masses meet, rather than the long span described in earlier concept versions; and (3) all overall dimensions and the module breakdown are corrected and rebuilt from a verified, independently engineered gallery-scale specification (120 cm height), scaled 2× to reach the confirmed monumental height of 240 cm.

Dimensions, module structure, weight, and material figures below are now considered final and traceable to a verified engineering source. Structural load calculations, anchoring specifications, and installation logistics specific to fabrication should still be confirmed with a structural engineer prior to fabrication, as final tolerances and safety margins depend on the selected fabricator’s methods.

Reference Dimensions

Final, verified — scaled 2× from an independently engineered 120 cm gallery-scale specification.

Total Height: 240 cm
Total Length (Front to Back): 450 cm
Total Width (Side to Side): 225 cm
Number of Modules: 10
Number of Legs: 6
Shadow Gaps: 3–5 mm

Views

Frog Perspective — Side — Bird’s Eye (Zenith) — Front. View geometry requires updated renders: existing visualizations show a long-span twisted bridge; the current design reduces this to a small connective module (B1, approx. 40 × 40 × 50 cm) at the point where the two bulbous masses meet. New renders should reflect this proportion at the corrected 450 × 225 × 240 cm scale.

Construction Details

1. Module Breakdown (11 Modules)

Two bulbous masses set close together, joined by a small connective module (B1) where they meet, supported by six legs of three distinct types. B1 is substantially reduced from earlier concept versions, which depicted a long structural bridge; it now reads as a compact, muscular knuckle rather than a separate spanning element.

B1 – Center Connective Mass: approx. 40 × 40 × 50 cm (W×D×H) — estimated from visual proportion; exact dimension pending maquette measurement [PENDING — REQUIRES RECALCULATION]
L1 – Left Bulbous Front: 112.5 × 90 × 120 cm (X×Y×Z)
L2 – Left Bulbous Rear: 112.5 × 90 × 105 cm
R1 – Right Bulbous Front: 112.5 × 90 × 120 cm
R2 – Right Bulbous Rear: 112.5 × 90 × 105 cm
F1 – Front Cone Leg Left: base 60 × 60 cm, height 135 cm
F2 – Front Cone Leg Right: base 60 × 60 cm, height 135 cm
O1 – Outer Arch Leg Left: length 195 cm (curved arch)
O2 – Outer Arch Leg Right: length 217.5 cm (curved arch)
P1 – Rear Pillar Leg Left: height 150 cm (vertical pillar)
P2 – Rear Pillar Leg Right: height 150 cm (vertical pillar)

2. Materials

Internal Frame (Primary): Mild steel, 60 × 30 mm, 3 mm wall thickness
Internal Frame (Secondary): Mild steel, 15–20 mm, 2 mm wall thickness
Cladding: Bronze-resin composite, 4–6 mm thickness, cold-cast
Bronze Surface: Bronze powder in epoxy resin, ~70% bronze content by weight
Flange Plates: Steel, 3.75 mm thickness
Base Plates: Steel, 4.5 mm thickness
Fasteners: Stainless steel bolts, M8/M10
Finish: Matte black RAL 9005, applied over bronze-resin cladding, matte seal

3. Connections

Unchanged.

Type: Hidden internal flange system
Bolt visibility: Invisible from exterior
Shadow gap: 3–5 mm between modules
Access hatches: Underside for maintenance
Total bolts (module flange connections, gallery-scale verified): 44 — bolt size/count at monumental scale pending structural engineering review [PENDING — REQUIRES RECALCULATION]

4. Floor Connection

Contact points: 6 legs (F1, F2, O1, O2, P1, P2)
F1/F2 base plates: approx. 70 × 70 cm, concrete anchor, scaled from verified gallery spec — final anchor count/torque pending engineering review [PENDING — REQUIRES RECALCULATION]
O1/O2/P1/P2 base plates: approx. 60 × 60 cm, concrete anchor, scaled from verified gallery spec — final anchor count/torque pending engineering review [PENDING — REQUIRES RECALCULATION]

Gallery Installation Guide

1. Preparation (Day 0, 2 hours)

Unchanged.

Clear gallery space to minimum 7 m × 5 m (footprint 450 × 225 cm plus clearance)
Protect floor with ram board or plywood
Verify ceiling height minimum 3.5 m (sculpture height 240 cm plus clearance)
Set up stepladders or small scaffolding for upper-module installation

2. Positioning

Unpack all modules — 11 modules in 3–4 crates at gallery scale; crating plan at monumental scale pending fabricator confirmation [PENDING — REQUIRES RECALCULATION]
Position floor anchoring system (6 points)
Align with gallery axes

3. Assembly Sequence (3 days)

Sequence updated for the 11-module structure with reduced-scale B1.

Day 1: Install leg modules (F1, F2, O1, O2, P1, P2)
Day 2: Install bulbous mass modules (L1, L2, R1, R2) onto leg structure
Day 3: Install B1 connective module between L1 and R1; final flange connections, floor anchoring, alignment, and closure

4. Anchoring

Indoor: Secure each leg to base plate per floor connection specification above; ballast/strap method pending fabricator confirmation [PENDING — REQUIRES RECALCULATION]
Outdoor: Concrete anchor per leg, per floor connection specification above — final anchor torque pending structural engineering review [PENDING — REQUIRES RECALCULATION]
Stability test: Lateral push test — force threshold pending structural engineering review at monumental scale [PENDING — REQUIRES RECALCULATION]

5. Final Check

Unchanged in principle; figures updated for current module structure.

Check all shadow gaps (3–5 mm)
Verify overall alignment (450 × 225 cm footprint, centered)
Ensure no contact with walls
Close all access hatches

Important Notes

The sculpture is permanent. No inflation required.
No blower, no air tube, no emergency deflation procedures.
Suitable for indoor and outdoor installations.
Annual inspection required for outdoor versions.

Specifications

Property	Value
Overall Size	450 × 225 × 240 cm (L × W × H)
Weight	Approx. 1,300 kg — calculated proportionally (cube-law) from a verified 120 cm gallery-scale specification (165 kg); does not yet include B1 module weight; final figure pending fabricator confirmation [PENDING — REQUIRES RECALCULATION]
Modules	11 rigid modules (B1 center connective module retained at reduced scale, approx. 40×40×50 cm)
Legs	6 (2 cone, 2 arch, 2 pillar — three distinct leg types)
Total Bolts (flange)	44 at gallery scale; bolt sizing/count at monumental scale pending structural engineering review [PENDING — REQUIRES RECALCULATION]
Frame	Mild steel, 60×30mm primary + 15–20mm secondary tubing (scaled from verified spec)
Shell	Bronze-resin composite, 4–6 mm, ~70% bronze content by weight
Finish	Matte black RAL 9005
Installation Time	3 days — pending confirmation at monumental scale [PENDING — REQUIRES RECALCULATION]
Disassembly Time	3–4 hours — pending confirmation at monumental scale [PENDING — REQUIRES RECALCULATION]
Lifespan Indoor	20–50 years
Lifespan Outdoor	10–20 years (with maintenance)

Anchoring Detail (Outdoor)

Leg Contact Point (F1, F2, O1, O2, P1, or P2)
Concrete Anchor per leg, sized to base plate (70×70cm for F1/F2; 60×60cm for O1/O2/P1/P2) — anchor spec and torque pending structural engineering review at monumental scale [PENDING — REQUIRES RECALCULATION]
Protective Cap

Floor Connection (Indoor)

Leg Contact Point (F1, F2, O1, O2, P1, or P2)
Steel Base Plate (70×70cm for F1/F2; 60×60cm for O1/O2/P1/P2), scaled from verified gallery-scale specification
Rubber Mat
Ballast or fixing method — final approach pending fabricator confirmation at monumental scale [PENDING — REQUIRES RECALCULATION]

;; ENTER THE OPUS ;;