Integrated Partner

Design with MTT CLT Panels

MTT manufactures CLT for mass timber, integrated into SPEC Toolbox with manufacturer production data on every panel. Size, verify and specify an MTT build-up into the project you're designing, verified to Eurocode 5. Every value comes from MTT's own production specification, not a generic catalogue number. Based in Johannesburg, MTT is a leading innovator in engineered timber prefabrication across Southern Africa, delivering precision-engineered panels, beams and columns.

Explore The Integrations → Powered by SPEC Toolbox. Real manufacturer production data on every part.
  • 15 calcs
    CLT tools available
  • 6,000 +
    Engineers using SPEC
  • 12 +
    EU CLT & fastener brands
  • 100 % free
    Browser-based · no download
Integrated product system available now under the EU.

The MTT system, ready to design

Integrated product system available now under the EU region tab.

Other
CLT (cross-laminated timber) design icon
CLT

CLT

Eurocode 5 (EN 1995-1-1) Calculator →
Other
Glulam beam and column design icon
Glulam

Glulam

Eurocode 5 (EN 1995-1-1) Calculator →
In their words

Why MTT builds on SPEC

“We believe that mass timber is the future of construction, offering a smart, sustainable alternative to conventional building systems. It brings together structural performance, speed of assembly, and environmental responsibility, all while unlocking beautiful biophilic design. With the right partnerships and platforms, we can scale up faster, build more responsibly and decarbonize the built environment across the continent. That’s why we are proud to be the first African manufacturer to partner with SPEC Toolbox. Through this collaboration, designers and specifiers can now seamlessly access MTT’s mass timber products directly inside the platform.”

— MTT, Mass Timber Technologies

Spectoolbox

About MTT

Mass Timber Technologies (MTT), based in Johannesburg, is a leading innovator in engineered timber prefabrication across Southern Africa. Specialising in Cross-Laminated Timber (CLT) and Glued-Laminated Timber (GLT), MTT delivers precision-engineered structural panels, beams, and columns.

MTT’s advanced facility manages the complete value chain, from lumber grading through robotic cutting, pressing, and CNC finishing. MTT is part of the Sustainabuild Group, a multi-disciplinary platform offering integrated solutions for sustainable construction across Africa.

Frequently asked questions

Design With MTT

Is the MTT calculator free to use?
Yes. Every MTT calculator on SPEC Toolbox runs free in the browser. No download, no licence, no account needed to design and verify with real manufacturer data.
What standard are MTT CLT designed to?
MTT CLT is verified to Eurocode 5 under the EU region tab.
Which MTT products are integrated?
CLT is integrated under the EU region tab. 1 product system in total.
Can I design connections into MTT CLT using any supplier's screws or brackets?
Yes. The calculator lets you pair MTT CLT with screws or brackets from any integrated supplier, verifying the connection against MTT's real material properties.
Where does the capacity data come from?
Directly from MTT's published production specification. Nothing is averaged or re-derived.
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