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Fire Retardant Birch Plywood

Treated Birch Plywood meeting the requirements of Euro Class B. Suitable for structural applications.

Individual birch veneers are soaked in PW-640 (a fire retardant liquid solution) prior to gluing and pressing. This means that augmented fire retardant performance can be achieved as part of the product’s production process and applies to the entirety of the finished panel. This method of treatment is more permanent in service than surface coatings and fire retardant properties can be maintained after cutting/ machining.

Fire Retardant Birch Plywood is available ex stock, carrying a full CE Mark for structural use in humid applications (EN 636-2) with an exterior, phenol formaldehyde, glue bond (EN 314-2 Class 3).

Typical Applications
  • Construction
  • Commercial Vehicle Building
  • Joinery
  • Shopfitting
  • Exhibitions
  • Stage sets
Applicable Standards
  • EN ISO 11925 – Ignitability test.
  • BS EN 13501-1 – Single Burning Item Test.
  • BS EN 313 – Plywood classification & terminology.
  • BS EN 314 – Plywood bonding quality.
  • BS EN 635 – Plywood classification by surface appearance.
  • BS EN 636 – Plywood specification.
  • European Class B/C Fire Ratings
  • EN 13986 – CE Marked to AVCP System 1
Environment

88% of Hanson Plywood’s Birch Plywood is sourced from well-managed, FSC® Certified forest management units (10% is sourced from PEFC™ certified sources).

The company’s robust FSC® Chain of Custody management system ensures that this certification is respected and adhered to throughout the supply chain. For further information, please refer to our Environment Page.

Quick Reference Guide – Birch Plywood

Hanson Birch Quick Reference Guide (Typical values collated from Russian, Polish and Finnish production standards).

Please note that all of the grades below are sanded with the exception of C grade.

Thickness (MM)
3
4
5
6
8
9
12
15
18
21
24
27
30
35
40
50
Available Grades
Typical Density (kg/m3)
Typical Weight/8x4 (Kg)
Number of Plies
Gluing Options
Thickness Tolerance * * Sanded panels only
B/BB, S+/BB, BB/BB, BB/CP, CP/CP, C/C
700kg/m3
6.2
3
E1 Int
+0.3
/-0.4
8.3
3
E1 Int
/Ext
+0.3
/-0.5
10.4
4/5
E1 Int
+0.4
/-0.5
12.5
5
E1 Int
/Ext
+0.4
/-0.5
16.6
6/7
E1 Int
+1
/-0.5
18.7
7
E1 Int
/Ext
+0.4
/-0.6
25
9
E1 Int
/Ext
+0.5
/-0.7
31.2
11
E1 Int
/Ext
+0.6
/-0.8
37.5
13
E1 Int
/Ext
+0.7
/-0.9
43.7
15
E1 Int
/Ext
+0.8
/-1.0
50
17
E1 Int
/Ext
+0.9
/-1.1
56.2
19
E1 Int
+1.0
/-1.2
62.5
21
E1 Int
+1.1
/-1.3
72.9
25
E1 Int
+1.05
/- 1.45
83.5
29
E1 Int
+1.2
/-1.2
105
36
E1 Int
+ 1.5
/- 1.9
*For further detailed information such as structural detail and help with specifications, please contact our technical team.
Quick Reference Guide – Fire Ratings

A question we are frequently asked is which fire rated panel will provide 30 minute or 60 minute fire resistance. The answer of course is not straight forward and although fire rated panels can be used as part of a fire barrier system, such as partitions, the finished design requires additional independent testing to achieve such a rating.

Since the introduction of the Construction Products Regulation (CPR) Fire retardant panels are tested against EN13823:2002 (SBI or Single Burning Item Test) and EN11925 (Ignitability Test) and given a rating against their performance.

SBI is the key test and records parameters relating to the rate of fire growth, lateral flame spread, heat release and smoke emission.

There are seven Euroclass Classifications for fire performance of different construction materials ranging from A1 and A2 through to F. Classifications for wood based panel products such as Plywood, MDF and Chipboard include B, C, D and E. Euroclasses D and E relate to untreated material.

Class
Performance Description
Fire Scenario
Heat Attack
Examples of Products
A1
No contribution to fire
Fully developed fire in a room
At least 60kW/m2
Products of natural stone concrete, bricks, ceramic, glass, steel and many metallic products
A2
No contribution to fire
Fully developed fire in a room
At least 60kW/m2
Products similar to those of class A1, including small amounts of organic compounds
B
Very limited contribution to fire
Single burning item in a room
40kW/m2 on a limited area
Gypsum boards with different (thin) surface linings. Fire retardant wood-based panel products
C
Limited contribution to fire
Single burning item in a room
40kW/m2 on a limited area
Phenolic foam, gypsum boards with different surface linings. Flame retardant wood-based panel products (thicker than in class B)
D
Acceptable contribution to fire
Single burning item in a room
40kW/m2 on a limited area
Wood-based panel products with thickness > about 10mm and density > about 400kg/m3 (depending on end use)
E
Acceptable contribution to fire
Small flame attack
Flame height 20mm
Low density fibreboard, plastic based insulation products
F
No performance requirements
Small flame attack
Flame height 20mm
Products not tested (no requirements)
Size
Type
12mm
18mm
Grade
BB
BB
1220mm x 2440mm
Euro Class B
Want to know more about Fire Retardant Birch Plywood? Simply fill out our Quick enquiry form or call us on 01422 330 444