Section Contents

Specifiers’ Design Guide for PS1 Plywood Grades

Plywood Grades:  A-A, A-B, A-C; B-B, B-C; C-C, C-D; D-D

Characteristic values for use in design calculations to Eurocode 5 are generated by the individual manufacturers.  Please refer to their products and design recommendations.

 Category Plywood Grades: A-A; A-B; A-C; B-B; B-C
 Bond Durability Exterior (Equivalent to EN 314 Bond Class 3)
 US Product Standard US PS1
 Veneer Strength Group 1 Face and Back
 Finish Sanded, one or two sides
 European Standards Complying with:
EN 636:    Plywood – Specification (Technical Class EN 636-3)
EN 635-3: Plywood – Classification by surface appearance – Softwood
EN 635-2: Plywood – Classification by surface appearance – Hardwood
 
Category Plywood Grade: C-C
 Bond Durability Exterior (Equivalent to EN 314 Bond Class 3)
 US Product Standard US PS1
 Veneer Strength Group 1 Face and Back
 Finish Unsanded
 European Standards Complying with:
EN 636:    Plywood – Specification (Technical Class EN 636-3)
EN 635-3: Plywood – Classification by surface appearance – Softwood
EN 635-2: Plywood – Classification by surface appearance – Hardwood
 
 Category Plywood Grades: C-D
 Bond Durability Exposure 1 (Equivalent to EN 314 Bond Class 2)
 US Product Standard US PS1
 Veneer Strength Group 1 Face and Back
 Finish Unsanded
 European Standards Complying with:
EN 636:    Plywood – Specification Technical Class EN 636-2)
EN 635-3: Plywood – Classification by surface appearance – Softwood
EN 635-2: Plywood – Classification by surface appearance – Hardwood
 
 Category Plywood Grade: D-D
 Bond Durability Exposure 1 (Equivalent to EN 314 Bond Class 2)
 US Product Standard US PS1
 Veneer Strength Group 1 Face and Back
 Finish Unsanded
 European Standards Complying with:
EN 636:    Plywood – Specification Technical Class EN 636-2)
EN 635-3: Plywood – Classification by surface appearance – Softwood
EN 635-2: Plywood – Classification by surface appearance – Hardwood
 

 Category Plywood: Sturd-I-Floor;  Underlayment; CC plugged; CD plugged
 Bond Durability

Sturd-I-Floor            Exposure 1 (Equivalent to EN 314 Bond Class 2)

Sturd-I-Floor            Exterior (Equivalent to EN 314 Bond Class 3)

Underlayment         Exposure 1 (Equivalent to EN 314 Bond Class 2)
CC plugged              Exterior (Equivalent to EN 314 Bond Class 3)
CD plugged              Exposure 1 (Equivalent to EN 314 Bond Class 2)

 US Product Standard US PS1
 Finish Touch sanded
 European Standards Complying with:
EN 636: Plywood – Specification (Technical Classes EN 636-2 for
Exposure 1 and  EN 636-3 for Exterior)
EN 635-3: Plywood – Classification by surface appearance – Softwood
EN 635-2: Plywood – Classification by surface appearance – Hardwood
 

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What is a ‘life cycle stage’ and how do these link to the environmental assessment of whole buildings?

How do core category rules link with environmental product declarations?

Whose responsibility is it to check that wood products being imported into the EU do not originate from illegally sourced timber supplies?

Does the EUTR require mills to provide any extra documentation for customs entry into the European Union?

Must all plywood and OSB panels carry a CE marking?

What is the definition of a construction product under the CPR?

What is a Declaration of Performance referred to under the Construction Products Regulation?

What is the difference between Structural 1 and Exposure 1?

Does structural panel siding have shear values?

What are mould and mildew, and do they compromise the integrity of engineered wood?

The CE-mark on an APA plywood panel means it conforms to European Standards – but which ones?

I want to use a Rated Sheathing panel for flooring/ roofing application, what info do I need to know?

Plywood: Span rating
OSB: Span rating

What extra strength benefits do Structural 1 OSB panels provide over standard Rated Sheathing panels?

Do APA panels give off formaldehyde?

Plywood: Formaldehyde
OSB: Formaldehyde

What is the difference between a touch-sanded panel and sanded panel?

I’d like to know how APA veneer grades match those given in the European standards

How do I correctly gauge the face appearance a plywood Siding panel?

I want to specify an APA panel for concrete formwork – what do I need to know?

Are APA panels tongue and grooved on all four edges?

I am not familiar with the term ‘Sized for Spacing’ – what is its significance?

How are Performance Category and thickness related?

I’d like to know more about a panel’s Span Rating and how it links to thickness.

Plywood: Span rating
OSB: Span rating

What is Span Rating on the APA trademark and why is it important?

Plywood: Span rating
OSB: Span rating

What is the difference between Exposure 1 and Exterior plywood panels? What are their appropriate uses?

What are the main OSB panels likely to be available in Europe?

What are the main plywood panels likely to be available in Europe?

What are the main European standards that I would need to be aware of for OSB panels?

The main standards are: EN 13986 and EN 300

What are the main European standards that I would need to be aware of for plywood panels?

The main standards are: EN 13986, EN 636, EN 314, EN 635-3