BS EN 14250:2010

Timber structures. Product requirements for prefabricated structural members assembled with punched metal plate fasteners. | Status: Current, Under review

1 Scope This European Standard specifies material, product and documentation requirements for prefabricated structural members (e.g. trusses for roofs, walls and floors, frames, composite beams and girders) for use in buildings made from solid structural timber according to EN 14081‑1 with or without finger joints assembled with punched metal plate fasteners. This document is valid for trusses with lengths up to 35 m and for other prefabricated structural members with spans up to 12 m. The standard also covers tests and/or calculation methods to carry out the evaluation of conformity, requirements for the marking of these members, and external conditions (service class 3 in accordance with EN 1995‑1‑1 or use classes 3, 4 and 5 in accordance with EN 335‑1). As regards resistance to biological organisms, this standard covers prefabricated structural members manufactured from either untreated timber or timber treated to improve its natural durability. This standard does not cover prefabricated timber structural members intended to be used in constructions under predominantly dynamic loads (e.g. bridges) or for use in unprotected external conditions (i.e. use class 3 in accordance with EN 335‑1). Furthermore, it does not cover members treated to improve their fire performance.