2012 British Woodworking Federation For joinery and wookworking - PDF document

20/12/2012 Stair Scheme 2012 British Woodworking Federation For joinery and wookworking manufacturers  A not-for-profit trade association run by the membership  Founded 1904  A 500 strong membership In a nutshell: The BWF provides a hub for knowledge and brings together companies within the industry to share problems and experiences and find solutions together 1

20/12/2012 BWF Iain McIlwee Kevin Underwood 2012 TIMBER STAIRS: The Agenda  Illustrate importance of stairs as part of a building’s STRUCTURE  Highlight implications and extent of bad practice  Explain the NEW BWF Timber Stair Scheme  Show how good design and innovative specification can raise standards, lower costs, improve safety and client satisfaction 2

20/12/2012 STAIRS; The facts  One of most hazardous locations in the home  500 Fatalities & 250,000 non-fatal accidents every year* • Many caused by trips & falls, gravity & age  Poor construction also to blame – • Substandard baluster in care home results in fatality • Stair collapses under weight of its twin during installation *BS 5395- 1 :2009 The BWF Stair Scheme Why we set up the scheme  Helping companies meet and interpret Standards • Loading – Deflection – Fire resistance  Help to develop more robust industry standards for stair manufacturing  Differentiate quality stair manufacturers  Improved building safety (occupants & emergency services)  Ease of recognition by Building Control  Differentiate accredited and non-accredited stair s 3

20/12/2012  What to look for  The 5 key steps 5. Fire Protection 4. Installation 3. Construction 2. Specification 1. Materials Specification:  “Designer” not always focused on compliance 4

20/12/2012 Materials: Good Practice: Bad Practice:   Components formed from unproven Strings made from solid timber components materials   Strings made from untested jointed Plywood risers materials  Strings made from accredited /  Hardboard risers certificated "engineered" timber laminated, finger jointed materials See BWF Technical Guide for Timber Stairs the ‘Brown Book’ Construction Good Practice:  Tapered trenched, glued and wedged construction  Risers securely fixed to treads  Factory assembly of trunks where practicable  Component transitions tested (handrail/newel, String /newel) - Newel to string joint, to be load bearing  Finger joint between string to easement Bad Practice:  Parallel trenches  Glue block, pinned not glued  Poorly secured riser  Handrails butt jointed and screwed  Butt joint between string and easement 5

20/12/2012 Installation 1. Good Practice:  Stair fixed to supporting structure in accordance with manufacturers instructions  Strings cut over the trimmer  String tenons draw bored into newel  Site assembled components screwed and glued  Non-standard assembly methods must be supported by evidence of acceptable performance. Bad Practice:  String abutted to trimmer  Tenons removed to overcome installation mistakes  Tenons not tight into newels  Nails in bore holes - should be dowelled  Leaning newel post due to incorrect storey height  Top of risers not securely fixed to tread Installation 2. Good Practice:  String cut over trimmer and securely fixed.  Steel straps supporting under strings where  Trunk fully supported required in accordance with manufacturer’s instructions 6

20/12/2012 The BWF Stair Scheme  Every stair “Badged” with unique identity serial number • Evidence of accreditation or certification  Colour coded to provide simple identification of rating G001279 G001301 G001279 Stair Company Stair Company Stair Company Ltd Ltd Ltd Common Stair Domestic Stair Fire protected Stair Where to find the badge 1. Back of Newel post, just under handrail 2. On front of bottom riser top left hand side • And in “no newel post” situation 3. On underside of bottom tread • If open tread design 7

20/12/2012 What’s behind the badge?  Accreditation Design and manufacture process independently verified as complying with relevant Building Regulations and/or product standards G001279 G001279 G001301 Stair Company Stair Company Stair Company Ltd Ltd Ltd Common Stair Domestic Stair Fire protected Stair What’s behind the badge? BWF code of conduct Business practice and relations with customers and employees Factory Production Control System (FPC) FPC system must be in place to ensure CONSISTENT standards Auditing Audits by BWF or approved partner Confirms continued compliance in manufacture and control systems Fire Certification Third party certification and auditing provided by BRE/LPCB Extending Knowledge Members engaged through Scheme meetings and exchange of information 8

20/12/2012 How Fire Protected Timber Stairs fit into this  LPCB in association with BWF and BRE Global have developed a Fire Protected Timber Stair scheme (SD198/BD2569)  It uses the BRE Global developed test methodology as published in BD2569 and the LPCB product approval scheme requirements All LPCB/BWF approved Fire Protected Timber Stairs  are listed on our web-based database  And in the “LPCB Red Book” One Step Joinery Elmwood Joinery R M Jones Joinery Flightwise Joinery Benlowe Stairs Northern Joinery David Smith St Ives P and L Joinery JELD-WEN UK Stairway Joinery Stairways Midland Stairplan Staircraft (Midlands) Timber Stair Manufacturers KwikStairs (Stairs 2U) Longwood Joinery Stairbox (AVC) Cullum and Clarke Trionic Joinery Central Joinery Two Twenty Stairs Lowe and Simpson M H Joinery Osmose G D Woodworking Metsa Wood A&A Joinery & Woodworking HMS Staircases E A Higginson and Co. Dernie and Bell Members of the BWF Stair Scheme 9

20/12/2012 Training and Support to Inspectors • Single point of contact for advice on timber stairs • Training opportunities to promote the use of timber stairs have been discussed with building control bodies Summary  Timber stairs meeting the future agenda  Accredited and Fire Certificated Stairs provide confidence in loading and deflection  New era in verification of stair compliance  Real alternative to concrete for low & medium rise developments  Accredited and Certificated products available now Remember… 10

20/12/2012 Look for the badge G001279 G001279 G001301 Stair Company Stair Company Stair Company Ltd Ltd Ltd Thank You www.stairscheme.org.uk www.bwf.org.uk 0844 209 2610 11