Modern construction relies more and more on metallic connectors. Their failure during fires is related to the glass transition of the lignin matrix at around 100°C. Based on this information, a series of tests were carried out exposing a wood specimen to various heat fluxes in a Cone Calorimeter. The aim of this research is to develop a sound temperature measurement methodology in wood samples exposed to high heat fluxes and to build a data-base in order to evaluate different wood pyrolysis models. The experiments yielded highly repeatable results that are seldom achieved with wood