"The ability of a specimen of a seperating element to contain a fire to specified criteria for collapse, freedom from holes, cracks and fissures and sustained flaming on the unexposed face."

Insulation

"The ability of a specimen of a seperating element to restrict the temperature rise of the unexposed face to below specified levels."

A.9.4 - Radiation

"...of value when calculating safe storage distances..."

"...measurement at a known distance...shape and size...irradiances at other distances...may be calculated."

"...use of these irradiances...matter for the specialists..."

"The use of irradiance measurements, taken in conjunction with translucent specimens, should therefore be used with discretion."

C.11 Observations

"...shall be monitored by means of a radiometer."

"NOTE 1. Irradiance from the surface of a test construction is a characteristic of the performance for which no criterion exists. There is, however, a need in the case of sperating elements that have poor insulating characteristics to determine the amount of heat being radiated from the whole or part of the specimen being evaluated."

EN 1363-1:1999

Fire resistance tests - Part 1: General Requirements

Integrity

"The ability of a test specimen of a separating element of building construction, when exposed to fire on one side, to prevent the passage through it of flames and hot gases and to prevent the occurence of flame on the unexposed side."

Insulation

"The ability of a test specimen of a separating element of building construction, when exposed to fire on one side, to restrict the temperature rise of the unexposed face to below specified levels."

EN 1363-2:1999

Fire resistance tests - Part 2: Alternative and additional procedures

Radiation

8.1 General

"... The hazard presented by radiation is evaluated in the (EN 1363-1) test by measuring total heat flux. ..."

Heat Flux

"The quantity of heat energy per unit area incident on the target of the measuring device. It includes heat transferred by convection as well as that due to radiation."

EN ISO 13943

Fire safety - Vocabulary

Heat Flux - amount of thermal energy emitted, transmitted or received per unit area and unit time.