Lightweight technology in the fire code

The sentence in the legislation

Section 13(5) of the Hungarian fire regulation states that buildings constructed with lightweight technology may only be built using technology, structural members, build-ups and detailing tested by an accredited institute.

The sentence seems clear on its own. The debate is not about whether it is true but about what falls within its scope.

The three cases

Based on the position of the interior ministry’s disaster management directorate, three situations are distinguished.

1. Building kit

The building is assembled as the product of one manufacturer or system owner, from prefabricated wall and floor panels. Here the manufacturer has system documentation and may not depart from it: no member may be omitted, no component substituted. A declaration of performance is issued for the kit.

2. Prefabricated, but not from one manufacturer

The building is assembled from tested building components from several sources. Prefabrication still takes place, and compliance has to be verified with a test report based on accredited laboratory testing, a declaration, or a fire compliance certificate.

3. Frame erected on site

If the structure is not created by prefabrication but by cladding a frame erected on site, then according to the official interpretation it is not lightweight technology. The contractor uses construction products whose compliance is verified by their own declarations of performance, and a national or European technical assessment cannot be required.

Fire compliance in this case has to be verified by Eurocode fire design and by an entry in the construction log from the responsible technical manager confirming that construction followed the design.

What to ask in practice

Not “does the company have a technical assessment”, but whether the house is built from prefabricated panels or from a frame erected on site. The two are different legal categories requiring different verification.

This question depends on the method of construction, not on the production line: the same machine can produce panels in a plant and cut site-assembled members to size.

What the profession disagrees about

We do not claim the question is settled. A stricter reading can also be derived from the text, and we will encounter it. Two practical oddities remain in any case.

One is that a building with a hollow-section frame and sandwich panels is also lightweight, yet system documentation is rarely asked for it — whereas for a thin-walled steel frame it usually is. The other is that some banks ask for a technical assessment during credit assessment for a steel-framed house, which is not a legal requirement but an internal bank rule.

This is not legal advice

The summary above reflects our reading of the referenced legislation in September 2026. Referenced legislation: decree 54/2014 (XII. 5.) BM, Section 13, and government decree 275/2013 (VII. 16.). On a specific project the position of the acting authority and the fire safety engineer governs.