UK National Structural Timber Specification (NSTS)

UK National Structural Timber Specification (NSTS)

UK’s National Structural Timber Specification

UK’s National Structural Timber Specification

The UK’s National Structural Timber Specification (NSTS) provides the construction industry with a set of best practice guidelines.

Produced by the Timber Research and Development Association (TRADA),as a step towards a national specification for structural timber. For free viewing, register at https://www.trada.co.uk/nsts.

Guide to matching an APA product, with NSTS material clause number and the relevant EU standard

 APA CE Marked

Structural Products

NSTS

Material

Clause No.

 European Standard
 

Plywood

 

5.2.5

 

EN 13986

 

OSB

 

5.2.4

 

EN 13986

 

LVL

 

5.2.3

 

EN 14374

 

I-Joists

 

5.3.1

 

See individual manufacturers appropriate European Technical Assessment

 

Glued laminated timber

 

5.2.2

 

EN 14080

 

Cross-laminated timber

(CPT)

 

5.2.7

 

See individual manufacturers appropriate European Technical Assessment

 

Structural softwood lumber

 

5.2.1

 

EN 14081-1

 

Structural Insulated Panels

(SIPS)

 

5.4.2

 

See individual manufacturers appropriate European Technical Assessment

The NSTS also contains a Guidance section which includes documents in TRADA’s Wood Information library which can be accessed after registration.

The Project Specification is published separately by TRADA for its membership. The NSTS needs to be read in conjunction with this as it includes additional project specific data not covered in this specification.

The Specification covers such areas as:

  • Information required by the timber contractor
  • Information to be supplied by the timber contractor
  • Materials
  • General workmanship
  • Fabrication
  • Protective treatments and finishes
  • Quality assurance.
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