Technology that makes design, production and assembly predictable.
It's not the technology that takes centre stage, but what it solves for you: fewer handovers, less execution risk and a result that matches the design.
- 35 years of experience
- 400+ projects
- 14 countries
- In-house engineering
- Own production
- NL point of contact
Execution risk arises at the handovers
In traditional construction a project passes through many hands. Every handover between parties is a moment where information is lost — and where failure costs, delay and disagreement arise.
Five parties, four handovers — and no one accountable for the whole.
One chain, from model to assembly
At ZTC the entire chain sits under one roof. Your model goes — via IFC — almost straight into the factory and comes out as an assembled structural shell. No handover between separate parties, so less room for error.
- 01
BIM model via IFC
Your design arrives as a model, not a stack of drawings that has to be re-entered.
- 02
Engineering
We develop it into a production model (LOD 400) and align every joint with you, before the freeze.
- 03
CNC production
The Hundegger line mills every panel to ±1 mm — dry and climate-controlled in the factory.
- 04
Quality control
Every panel passes a visual and dimensional final inspection aligned with ISO 9001 principles, with photo reporting per project.
- 05
Assembly
Our own crews assemble on site: 3–5 days per storey, weathertight per block.
Result for the client
Less handover risk
One party accountable for the entire structural shell — one contract, one schedule.
Better buildability
Joints and tolerances are aligned before production; what's drawn can also be built.
More precise assembly
Milled to ±1 mm: on site everything fits first time, without rework.
More control over quality
Production in a climate-controlled factory with final inspection per panel — not out in the weather.
Clearer documentation
CE/ETA documentation, product data and photo reporting — substantiation for your structural engineer and quality assurance officer.
The technical systems
Timber frame
Prefabricated wall, floor and roof panels for 1–5 storeys. U-value from 0.12 W/m²K, cellulose or wood-fibre insulation, windows fitted in the factory.
CLT (cross-laminated timber)
Solid timber structures up to 8 storeys. 3-, 5- or 7-layer, max. panel 13,800 × 3,100 × 400 mm, fire resistance up to EI 120, acoustics Rw up to 65 dB, formaldehyde-free adhesive.
Hybrid
CLT core + insulated timber frame envelope — combines load-bearing capacity and thermal performance, with a more favourable cost profile than pure CLT.
CNC & engineering
Hundegger CNC production to ±1 mm, model-based engineering in SEMA with BIM exchange via IFC (LOD 400).
CLT panel max. 13,800 × 3,100 × 400 mm · CE marking under ETA-21/0014, engineered to the Eurocodes · production administration aligned with ISO 9001 principles · BIM exchange via IFC, engineering at LOD 400. For Dutch sign-off we work with a Dutch structural engineer.
Need specifications or a buildability check?
Build-ups, EI values, acoustics and U-values per assembly are available on request. Or send your design — we assess buildability and you receive a first indication within ten working days.