Earthquake in Eilat: Lab Data on Wall Systems Offers New Construction Insights

An earthquake measuring 4.5 on the Richter scale struck the Gulf of Eilat on November 11, 2026, at 11:24 AM, approximately 30 kilometers south of the city. The tremor, centered in the sea near Taba, caused no reported injuries or damage. This event marked the first real-time activation of Israel's earthquake early warning system, which has been operational for five years and relies on a network of seismic detectors. The Home Front Command issued alerts to residents in several southern communities, advising them to move to open areas. Ramon Airport temporarily halted operations for infrastructure checks, resuming after about 40 minutes. Approximately 50 minutes after the initial alert, the Home Front Command declared it safe to return to undamaged buildings.

Beyond the immediate response, the earthquake highlighted a quieter engineering question: the data used to select wall systems for new construction. Ecobuild System Ltd., the exclusive importer of NUDURA ICF (Insulated Concrete Forms) in Israel, suggests using laboratory-measured data on wall system performance under cyclic loads, rather than relying solely on material properties. This approach aims to enhance construction standards beyond the mandatory Israeli Standard (TI 413) for earthquake resistance.

Laboratory tests conducted at EUCENTRE in Pavia, Italy, compared NUDURA ICF walls to reference walls. The tests measured shear and bending failure mechanisms, assessing ductility, which is the ability of a structural component to deform beyond its yield point without losing load-bearing capacity, thereby dissipating energy. NUDURA walls demonstrated ductility values of 15 to 19, compared to 8 to 12 for reference walls, representing an 87% improvement. The tests also found reduced cumulative damage in NUDURA walls after cyclic loading, addressing a key engineering concern about the impact of the formwork's polymer components on the concrete core.

While laboratory results do not guarantee a building's performance in a specific earthquake, they provide engineers with measured data for informed decision-making. Ecobuild emphasizes that the choice of wall system impacts not only safety but also post-event recovery, including inspection and repair costs. Doron Arusi Halevi, founder and CEO of Ecobuild System Ltd., stated that while the early warning system functioned as planned, the building's behavior during an earthquake is determined during the design phase. He urged stakeholders to examine the available test data, which includes full-scale wall tests conducted under international protocols.

Ecobuild recommends that developers, planners, and public bodies consider specific questions when selecting wall systems for new projects. These include the type of full-scale cyclic tests performed, measured ductility values, the impact of formwork on the concrete core, cumulative damage documentation, and whether the design adheres to Israeli Standard TI 413 with licensed structural engineering oversight. NUDURA ICF systems have been used in over 86 countries, with half a million housing units built, alongside schools, hospitals, and military bases.