Archivo de la etiqueta: compartimentación

Equivalencia entre elementos compartimentadores de clasificación EW y EI

Las cortinas de fuego, denominadas por el CTE como sistemas complejos y no convencionales de protección contra incendios, tienen como objetivo sellar un área para contener el fuego e impedir que el incendio se propague por el interior del edificio. Son sistemas invisibles que permiten conseguir espacios abiertos y diáfanos, siendo únicamente visibles en caso de incendio.

Las cortinas de fuego ofrecen diferente clasificación de resistencia al fuego: E, EW, EI.

En el mercado encontramos cortinas de fuego con clasificación EW y EI. En este artículo analizamos en qué situaciones es posible la equivalencia entre un elemento separador con clasificación de resistencia al fuego EW y otro con clasificación de resistencia al fuego EI, es decir, exponemos la validez de un elemento clasificado EW para separar sectores de incendio.

Clasificación de resistencia al fuego según norma UNE EN 13501-2:2009+A1:2010

01 SECUENCIA PROTECCIONES_E 01Integridad (E)

Es la capacidad de un elemento de soportar la exposición al fuego en una cara sin que exista paso de llamas y gases calientes a la cara no expuesta, durante el tiempo indicado en minutos.

Radiación (W)

02 SECUENCIA PROTECCIONES_EW 01Es la capacidad de un elemento para soportar la exposición al fuego en una cara y reducir la posibilidad de transmisión del fuego limitando la radiación de calor emitida desde la cara no expuesta, durante el tiempo indicado en minutos.

Aislamiento (I)

03 SECUENCIA PROTECCIONES_Ei 01Es la capacidad de un elemento de soportar la exposición al fuego en una cara sin que se produzca transmisión del incendio a la cara no expuesta para asegurar la protección de personas y evitar la ignición de materiales, situados en las proximidades, durante el tiempo indicado en minutos.

Sistemas de Cortina de Fuego COLT ARQFIRE

Colt ofrece los siguientes sistemas de cortina de fuego:


COLT ARQFIRE E120/EW120 (no irrigada)

Clasificación de resistencia al fuego E 120/EW 60 (*)
[Integridad + Control de la radiación durante 120 minutos]

(*) Según la normativa UNE EN 13501-2 la clasificación de resistencia al fuego EW es como máximo 60, pero la muestra mantuvo el criterio de radiación (radiación máxima < 15kW/m²) durante todo el transcurso del ensayo, 120 minutos.

  • 03 COLT ARQFIRE E120_EW120 01B 05_07_15Informe de Idoneidad Técnica nº 13/5305-2861.
  • Inscripción en el Registro General del CTE con referencia CTE-CISCPI-015/14.
  • La totalidad del sistema ha sido testado en laboratorio certificado según las normas UNE EN 1634-1, UNE EN 1363-1 y UNE EN 13501-2.
  • Informe de extensión de aplicación de resultados (EXAP) según proyecto de norma prEN 15269-11:2013.
  • Ensayos para tensión máxima horizontal y vertical, y encogimiento de la tela según norma UNE EN 1363-1:2000.
  • Prueba de durabilidad garantizando una larga vida del sistema por el número de maniobras certificado según norma EN 14600 mediante ensayo de prototipo para longitud superior a 10 metros.
  • Prueba de impacto y presión del sistema según norma EN 949.

COLT ARQFIRE EI 120 (irrigada)
Clasificación de resistencia al fuego EI 120
[Integridad + Aislamiento durante 120 minutos]

  • 05 COLT ARQFIRE EI120 01B 05_07_15Informe de Idoneidad Técnica nº 14/6411-390.
  • Inscripción en el Registro General del CTE con referencia CTE-CISCPI-016/14.
  • La totalidad del sistema ha sido testado en laboratorio certificado según las normas UNE EN 1634-1, UNE EN 1363-1  y UNE EN 13501-2.
  • Informe de extensión de aplicación de resultados (EXAP) según proyecto de norma prEN 15269-11:2013.
  • Ensayos para tensión máxima horizontal y vertical según norma UNE EN 1363-1:2000.
  • Prueba de durabilidad garantizando una larga vida del sistema por el número de maniobras certificado según  norma EN 14600 mediante ensayo de prototipo para longitud superior a 10 metros.
  • Prueba de impacto y presión del sistema según norma EN 949.

Análisis de la equivalencia entre elementos compartimentadores de incendio EW y EI

EXPOSICIÓN  DE ARGUMENTOS

  • Desde diciembre de 2014 el DB SI del CTE reconoce la equivalencia entre elementos separadores EW y EI (anteriormente disponíamos de la carta de D. José Luis Posada de fecha 28/12/2006):
cte db si

Fuente: CTE DB SI – Revisión junio 2015 (página 20)

 

  • ¿En qué casos será válido un elemento EW para separar sectores de incendios?Los condicionantes que nos permitirán proponer un sistema EW son:

    Que no haya paso de personas y/o material combustible almacenado en las inmediaciones de la cortina (o que el paso de personas se realice por espacios amplios)
    o bien,

    Que los espacios tengan baja carga de fuego
    o bien,

    Que se trate de espacios amplios con posibilidad de disipación de la temperatura
    o bien,

    Que no haya acceso directo a la cortina
    o bien,

    Que haya un diseño estudiado, por ejemplo, de combinación de cortina con un vidrio con una separación entre ellos que actúe como cámara de aire.

CONCLUSIÓN

Acogidos por el reconocimiento de la equivalencia entre los elementos separadores EW y EI que figura en el DB SI del CTE, podremos proponer elementos con clasificación de resistencia al fuego EW para separar sectores de incendio en los proyectos con las características arriba mencionadas.

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