29/10/2018

DRF CLASS – Durability of Reaction to Fire Performence

Classification: BS EN 16755:2017

WESTERN RED CEDAR IMPREGNATED WITH BURNBLOCK RECEIVES
BS EN 16755:2017 CLASSIFICATION
 FOR INTERNAL AND EXTERNAL USE (INT1, INT2 AND EXT).

BS EN16755:2017 – The standard defines a classification system for verifying the durability of the fire protection of fire retardant-treated wood products for indoor and outdoor use.
The standard defines three DRF (Durability of Reaction to Fire Performance) classes that describe the durability of fire protection:

INT1 – for permanent use in interior dry applications.
INT2 – for permanent use in interior humid applications.
EXT – for permanent use in exterior applications.

THE FACTS 

BS EN 16755:2017
CLASSIFICATION FOR INTERNAL AND
EXTERNAL USE
INT1, INT2 AND EXT  *(NOTE 1).

*read more about Note 1 below.

    • WESTERN RED CEDAR

The classification paper has been issued
by Warrington in UK. As such, it has been
issued in accordance with British Standards.
It is up to the individual country using EN 16755:2017 as to what degree they wish
to apply to an EN standard

ADVANTAGES

✓ No coating required

✓ For permanent use in
    interior dry applications

✓ For permanent use in
    interior humid applications

✓ For permanent use in
    exterior applications

 

BENEFITS

✓ No paint or surface
    treatment required

✓ No maintenance of the fire
    treatment required

✓ More flexibility in many
    application areas

  • BURNBLOCK provides you
    with the classification paper
    in digital form.
    We are at your disposal for
    further questions.

NOTE 1:
the classification paper has been issued by Warrington in UK. As such, it has been issued in accordance with British Standards. It is up to the individual country using EN 16755:2017 as to what degree they wish to apply to an EN standard. In the case of EN 16755:2017, BS follows the EN standard in all areas other than the requirement of a maximum difference of 20% between the total heat release in fire tests made before and after the accelerated weathering test. As it is described in Note 1 in the certificate: “..when the timber is at Class B then a 20% increase in the total heat release is a very small number and can be exceeded simply in the variability between the measurement in 3 specimens of timber whether or not it has been weathered and therefore is an unreliable criteria for determining the effects of weathering”. Therefore, be aware that this particular point is addressed differently across the European countries using the standard. However, this difference is highlighted in the BS EN 16755:2017 certificates, we have received.