Pretoria & Gauteng Roof Trusses — Built to Spec. Delivered on Time.

A manufacturer designs, engineers and fabricates in its own accredited factory — and carries direct liability when something goes wrong. An agent or broker does not manufacture anything. They source from whichever fabricator is cheapest at the time. You have no visibility into who designed your trusses, whether SANS-compliant drawings exist, or whether any accreditation was held. When failure occurs, the agent blames the fabricator and the fabricator disputes liability — leaving you with a structural defect and no clear recourse. Isocraft Truss is a direct manufacturer. Every set of trusses carries full MiTek engineering documentation, SANS-compliant structural drawings and our ITC SA Category A certification. One accountable party — from design to installation.

1. Are you a direct manufacturer or a broker? A manufacturer carries direct liability. A broker does not.
2. Do you hold ITC SA Category A Fabricator Membership? The highest independently audited certification in SA — requires factory inspection, quality audit and verified design capability.
3. Do you produce SANS 10160-compliant engineering drawings? Full working drawings are issued upon signed order and design fee payment — your legal record of what was engineered and built.
4. Are you a MiTek Authorised Partner? Confirms certified software, genuine connector plates and trained personnel — not improvised substitutes.
5. Who carries engineering liability if trusses deflect after installation? A confident manufacturer answers this clearly and in writing. If the supplier avoids it — that is your answer.

Isocraft Truss answers yes to all five.

Roof trusses built on site by unqualified erectors using rule-of-thumb measurements — without structural engineering calculations, certified software, SANS 10160 compliance, ITC SA oversight or MiTek connector plates — are not roof trusses in any engineering sense. They are timber assemblies. And they will behave accordingly.

An under-engineered roof does not fail on a schedule. It fails when the load exceeds what rule-of-thumb could not calculate. That can be months after installation. It can be days. The failure pattern is predictable: deflection first, which opens gaps in the roof covering; then water ingress; then accelerated timber decay; then connector failure; then structural collapse. Every person living or working under that roof is at risk.

The attraction — always — is price. A site-made assembly is cheaper because engineering was skipped. No structural designer. No certified software. No ITC SA audit. No quality-controlled manufacturing. The saving is real. So is what it costs you later. Do your due diligence. Ask the right questions before you commit.

As we say in South Africa: "Die koop is deur koop." The cheap purchase ends up costing more than the right one ever would. Isocraft Truss manufactures every truss in a certified factory, to SANS 10160, under ITC SA Category A accreditation — no rule of thumb, no on-site fabrication, no compromises.

It almost certainly means that supplier lacks the engineering capability to execute the design — not that the design is structurally invalid. Complex roof geometries, unusual spans, non-standard pitches and compound hip configurations are entirely achievable when designed using professional structural engineering software by a qualified designer, and manufactured by an ITC SA Category A certified fabricator. An unaccredited supplier without certified software, without a qualified structural designer and without the production capacity for complex work will encounter designs they cannot replicate. That is a limitation of their process — not a flaw in the engineering.

Isocraft Truss designs are produced by our Senior Structural Designer using MiTek engineering software to full SANS 10160 compliance. Every design is structurally justified by calculation — not by opinion or rule of thumb.

If a supplier tells you our design is impossible, ask them one question: "Which SANS standard are you applying, and can you show me the calculation?" If they cannot answer that — you have your answer.