Leonardo de Jesús Reyes Madera, director of the Dominican Republic's National Office for Seismic Evaluation and Vulnerability of Infrastructure and Buildings (Onesvie), testified in the trial of Antonio and Maribel Espaillat that the Jet Set nightclub roof collapsed due to extreme weight accumulation exceeding its structural design capacity. ^[1] The collapse of the Jet Set nightclub in Santo Domingo killed 236 people and injured more than 80. ^[2] Engineers Leonardo Reyes Madera and Máximo José Corominas testified that the Jet Set disco roof collapse, which killed 248 people and injured 180, was caused primarily by structural overloads. ^[3] Reyes Madera said the mortar layer on the Jet Set roof measured up to 37.5 centimeters thick, far exceeding the 7-centimeter design requirement for rainwater drainage. ^[4] Reyes Madera said the thick mortar increased the roof's permanent load from 160 to over 650 pounds per square foot. ^[5] Corominas testified that a structure with adequate materials can still collapse if subjected to a weight exceeding its design limits. ^[6] Engineers identified four layers of flooring with a combined thickness of 37.5 centimeters as a contributing factor to the increased load. ^[7] The building's structural weight increased from an original design of 160 pounds per square meter to over 650 pounds per square meter. ^[8]