This is the general standard that mainly reports on the various classes and performances achievable by products from fire resistance tests.

EN13501-1, covers classification using data from reaction-to-fire tests.

EN13501-3, covers classification on products and elements of service installations, such as ducts and fire dampers.

EN13501-4, covers classification using test data on smoke control components.

EN13501-5, concerns the classification for external fire exposure for roofs.

In particular, the standard that is most relevant to our operation is EN13501-2, in which loaded and unloaded elements with a separating function (or not), with or without glazing, are considered.

By way of example:







protective coverings;



fire doors and their components;

smoke-controlled doors;


and lift doors tested to EN1634-1 (other lift doors are tested to EN81-58).

In particular, for doors it defines:

Integrity – E

breaks or openings of a certain size;

ignition of a cotton pad;

sustained flame in the unexposed part.

Thermal insulation – I

Thermal insulation will take place on two levels, with suffixes 1 and 2 (2 for the additional procedure).

Irradiation – W

The ability to keep the maximum radiation value below 15 kW/sq.m. is assessed.

Self-closing – C

Self-closing is the ability of a door to close completely and engage the latch, without human intervention.

Smoke tightness – S

Smoke tightness at room temperature – Sa

The smoke seal at room temperature and at 200 degrees – Sm (S200)

Other special elements have further characteristics:

M – mechanical action, impact resistance;

G – resistance to thermal attack for chimneys;

K – ability to protect against fire for a specified period (protective).

Load-bearing capacity – R

Let us note that R is the load bearing capacity, e.g. in a wall, the ability to support a load despite fire for the specified time (e.g., R120, or REI120, would be the capacity of a fire barrier for 120 minutes). It does not apply to doors.

This letter was used in the old national standard, UNI9723, for doors, for R.E.I. (Resistance Hermeticity Insulation) characteristics.

Let’s say that in Italy today it is not wrong to define an EI 120 door, REI 120, as Article 1, paragraph 4 of the DM 21.06.2004 states that an EI2 120 door is equivalent to an REI 120 door according to the old national standard. It is just obsolete!


The classes are the duration in minutes, approximated by default, within these periods:

E 15 20 30 45 60 90 120 180 240
EI1 15 20 30 45 60 90 120 180 240
EI2 15 20 30 45 60 90 120 180 240
EW 20 30 60

In general, the classification of an element is expressed by the following matrix:

R E I W t – M S C IncSlow sn ef r