Structural Work
96 sources in the library on structural work, 9 on this page cited in a published note. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 2 of 3.
- fair RN-1WBK8Y cited
Association of Specialist Underpinning Contractors
The underpinning trade association's guidelines on underpinning and mini piling. Its glossary defines mini piles as small-diameter piles up to 350 mm diameter installed with restricted-access rigs.
Cited in Underpinning: When You Need It & Cost.
- fair RN-RTPCJL cited
The Building Conservation Directory (Dr Derek Clarke and Dr Joel Smethurst, University of Southampton)
An article by two University of Southampton researchers on clay soil moisture and buildings. It reports that drying reaches about one metre under grass but three metres or more under a large oak.
Cited in Underpinning: When You Need It & Cost.
- supplier figure RN-PDF2TT cited
Builder Depot
Builder Depot product page for the IG L1/HD 100 heavy-duty cavity lintel, 2,400 mm long, at £196.08 including VAT: the low end of the corrected 2,400mm heavy-duty row.
Cited in Lintels: Types & Sizing.
- supplier figure RN-Y3NPPK cited
MiTek Industries
MiTek's Posi-Joist standard details list the standard web types and depths: PS8 202 mm, PS9 225 mm, PS10 253 mm, PS12 304 mm, PS14 373 mm and PS16 421 mm.
Cited in Strengthening Loft Floors for Conversion.
- supplier figure RN-1FFJDH cited
Selco Builders Warehouse
A builders' merchant product page for a single 440 x 215 x 102 mm precast concrete padstone, priced at £30.50 excluding VAT (£36.60 including VAT).
Cited in Removing a Load-Bearing Wall: Cost, Steel Beams, Process.
- supplier figure RN-JRSXK0 cited
Total Hire and Sales
A tool hire firm's published 2026 price list, all prices excluding VAT. It charges £7.67 a week for Acrow props sizes 0 to 4 and £11.49 for a Strongboy wall prop.
Cited in Soundproof Fence Cost: 2026 UK Price Guide, Steel Beam (RSJ) Sizing & Installation.
- supplier figure RN-BYGOQI cited
Wade Building Supplies
Wade Building Supplies product page for the Birtley HD90 heavy-duty 100 mm cavity lintel, listing the 2,400 mm length at £302.00 including VAT: the top of the corrected row.
Cited in Lintels: Types & Sizing.
- supplier figure RN-WIL8NQ cited
Wienerberger UK
Brick maker's guide to UK brick sizes. It gives the standard UK brick as 215 mm long, 102.5 mm wide and 65 mm high, which sets half-brick and one-brick wall thicknesses.
Cited in How to Tell If a Wall Is Load-Bearing.
- supplier figure RN-6UT6WT cited
Wienerberger UK
A brick maker's guide explaining that engineering bricks are rated Class A or Class B, with Class B the more common, and giving their strength and absorption limits.
Cited in Steel Beam (RSJ) Sizing & Installation, Types of Brick: Facing, Engineering & Common.
- very strong RN-4ATLE5
Building Control Northern Ireland (the 11 district councils)
NORTHERN IRELAND. The Northern Ireland Building Regulations are made by the Department of Finance and administered by the 11 DISTRICT COUNCILS, so there is no private sector alternative: Northern Ireland has no approved inspectors and no registered building control approvers, and the England route of appointing a private building control body simply does not exist. The page lists the Building Regulations (Northern Ireland) 2012 with the amending regulations of 2014, 2016 and 2022, and links the current and historical Technical Booklets plus the contraventions and appeals route. The regulations are intended to secure the safety, health, welfare and convenience of people in and around buildings and to further the conservation of fuel and energy. The site names all 11 councils including Belfast City, Derry City and Strabane, Lisburn and Castlereagh, Newry Mourne and Down, Mid Ulster and Fermanagh and Omagh.
- very strong RN-8XFMI0
Department of Finance (Northern Ireland)
The Northern Ireland index of technical booklets, which take the place of England's Approved Documents under the Building Regulations (Northern Ireland) 2012. Current editions: B materials and workmanship (July 2013), C site preparation and resistance to contaminants and moisture (October 2012), D structure (October 2012), E fire safety (October 2012), F1 conservation of fuel and power in dwellings and F2 in other buildings (both June 2022), G resistance to the passage of sound (October 2012), H stairs, ramps, guarding and protection from impact (October 2012), J solid waste (October 2012), K ventilation (October 2012), L combustion appliances and fuel storage (October 2012), M physical infrastructure for high-speed communications networks (January 2017), N drainage (October 2012), P sanitary appliances, unvented hot water storage and reducing the risk of scalding (October 2012), R access to and use of buildings (October 2012) and V glazing (October 2012). Note for any electrical note: there is no Northern Ireland technical booklet covering electrical safety, so there is no Part P equivalent and no electrical competent person self-certification regime there. Ventilation is Booklet K, drainage Booklet N and glazing Booklet V, not F, H and K as in England.
- very strong RN-TBNA5T
HM Revenue and Customs
The single most useful correction for any derelict-property or doer-upper note. HMRC states flatly that there is no tax relief and no lower rate of SDLT for uninhabitable properties, that a very high proportion of repayment claims in this area are wrong, and that buyers should be cautious about being misled by repayment agents. Being suitable for use as a dwelling is not the same as being ready for immediate occupation, and if a building retains the character or identity of a residential property it is wholly residential for SDLT despite disrepair. Lists the defects that expressly do not make a property unsuitable for use as a dwelling, even in combination: temporary removal of bathroom or kitchen facilities before sale, substantial repair or replacement of windows, floors, doors or roof, replacement boiler and pipework, unsafe electrical wiring, services switched off, pest infestation, damp proofing needed or plasterboard damage, flood damage, the presence of asbestos, and structural defects that can be repaired. Past use as a dwelling is a strong indicator of suitability. Cites the Court of Appeal in Amarjeet and Tajinder Mudan [2025] EWCA Civ 799 as now legally binding, upholding the Upper Tribunal at [2024] UKUT 307 (TCC). Manual published 19 March 2016, updated 1 September 2026.
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Ministry of Housing, Communities and Local Government
The 130-page PDF of the August 2026 National Planning Policy Framework, the document a planning officer works from. It is the citable text for policy GB7, which lists what is NOT inappropriate development in the Green Belt and therefore needs no very special circumstances: agriculture, horticulture and forestry or work solely for nature conservation; the reuse, extension, alteration or replacement of an existing permanent and lawful building where the change is not a disproportionate increase in size against the original building (and any replacement is for the same use and not materially larger); limited infilling in Green Belt villages; limited affordable housing for local needs; redevelopment of previously developed land that would not cause substantial harm to openness; and, where openness impact is minimised, mineral extraction, engineering operations, utilities and telecommunications infrastructure needing a Green Belt location, Community Right to Build or Neighbourhood Development Orders, material changes in the use of land, and facilities for outdoor sport, recreation, cemeteries, burial grounds and allotments. GB7(1)(g) adds the grey belt route and GB8 sets the Golden Rules for major housing development. Chapter 20 (HE1 to HE10) is the heritage chapter: HE1 covers plan-making and local heritage lists for non-designated assets, HE2 covers conservation areas and World Heritage Sites, HE3 covers Historic Environment Records, HE4 requires conservation appropriate to significance and clear and convincing justification for harm, and HE5 requires a proportionate significance assessment and a stated degree of harm, judged on effect on significance rather than the scale of the development.
- very strong RN-MQ9OJ9
Northern Ireland Housing Executive
Northern Ireland runs a materially wider set of housing grants than Great Britain, administered by the Northern Ireland Housing Executive rather than a local council. Six schemes are listed. The Affordable Warmth Scheme addresses fuel poverty and energy inefficiency for low-income households. The Disabled Facilities Grant adapts a disabled person's home, but unlike in England it requires a health trust occupational therapist to recommend the work. The Repair Grant helps landlords where a council has issued a statutory notice for repairs. The Renovation Grant is for homes inspected and found unfit to live in, and the property must be the applicant's main or only home. The Replacement Grant is available only where the home is in a rural area, is unfit to live in and repair is not an option. The Home Repair Assistance Grant covers small-scale repair work and improvements. The Renovation, Replacement and Home Repair Assistance Grants have no equivalent in England.
- very strong RN-PFL4Z7
Scottish Government (gov.scot)
SCOTLAND, and it replaces England's Part P competent person scheme, which does not apply in Scotland at all. Published 1 May 2012, third edition, 48 page PDF, 683.6 kB. The handbook governs Scotland's two certification routes under the Building (Scotland) Act 2003: approved certifiers of design, used for structural design and for energy, and approved certifiers of construction, used for electrical installations and for drainage, heating and plumbing. A certificate from an approved certifier is accepted by the verifier as conclusive evidence of compliance for that part of the work, reducing what the verifier checks, but it does not remove the need for a building warrant or for the relevant person to submit the completion certificate. Scheme providers are listed on the certification register at certificationregister.co.uk. Contact is buildingstandards@gov.scot or 0131 244 6511.
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Scottish Government (gov.scot)
SCOTLAND. Paragraph 3.1.3 confirms the fee is payable at the time of application and that the verifier agrees with the applicant what drawings, specifications and other information are needed. Paragraph 3.1.4 requires a building warrant for a conversion as defined in schedule 2 of the building regulations even where no building work is proposed, which catches change of use jobs that England would treat as a material change of use under the Building Regulations 2010. Paragraph 3.1.5 requires an amendment to the warrant BEFORE work starts on any construction that departs from the approved drawings or specifications, and unamended changes can attract a building warrant enforcement notice. Offences can be reported to the Procurator Fiscal, though a building warrant enforcement notice under section 27 of the Act is the normal route, and it can only be served on the relevant person, so a builder working for a client cannot be served with one. Section 3.2 provides for pre-warrant meetings and customer agreements.
- very strong RN-8T0SVC
Scottish Government (gov.scot)
Scotland's equivalent of the Approved Documents, and the reason a note that quotes only English rules is wrong for a fifth of the UK. This edition is in force from 6 April 2026 and applies to building warrants submitted on or after that date and to work not requiring a warrant commenced from that date. It gives guidance on achieving the standards set in the Building (Scotland) Regulations 2004, arranged in sections rather than parts: section 3 environment (ventilation, drainage, condensation), section 4 safety (electrical safety and installations, glazing and danger from accidents, including clause 4.13 which invokes PAS 24 for security), section 6 energy (U-values for windows and doors) and section 7 sustainability. Scotland uses a building warrant and a completion certificate rather than a building notice, and has no Part P competent person scheme equivalent, so electrical work is covered by the warrant system instead.
- very strong RN-8DX7RR
Scottish Government (gov.scot)
SCOTLAND. The Scottish Government policy page that explains the technical handbooks expand the functional standards set by the Building (Scotland) Regulations 2004, and dates the current edition: new technical handbooks apply from 6 April 2026, amending Section 0 General, Section 2 Fire, Section 3 Environment and Section 4 Safety. Section 0 is updated for the amendment to Regulation 8 and a changed definition of traditionally constructed buildings; Section 2 gives effect to Simon and Richard's Law with extended guidance on conversions of traditional buildings, materials limiting fire spread and escape, and amends Standard 2.15 on automatic fire suppression; Standard 3.3 gains new flooding and groundwater guidance with a flooding annex; and clause 4.1.7 gains advice on letterplate positioning in new dwellings.
- very strong RN-84BHGV
Scottish Government (gov.scot)
SCOTLAND, and the numbering has no England equivalent: Scotland puts escape under Standard 2.9, not Approved Document B. Clause 2.9.4 requires an escape window in every apartment on an upper storey not more than 4.5 metres above the adjacent ground, and in every inner room at that height, unless there is an alternative route of escape. The escape window must have an unobstructed openable area of at least 0.33 square metres and be at least 450 mm high and 450 mm wide, with the bottom of the openable area not more than 1100 mm above the floor; the route through may be at an angle. Above 4.5 metres an escape window is not accepted and clause 2.9.5 requires every apartment to have direct access to a protected enclosure with self-closing short fire resistance duration fire doors leading to an exit door. Above 7.5 metres clause 2.9.6 requires an alternative exit. Text verified identical in the April 2026 PDF handbook.
- very strong RN-4KIEKS
Scottish Government (gov.scot)
SCOTLAND. Standard 3.2 requires protection from radon and sets the action level at 200 becquerels per cubic metre, the level above which radon in homes should be reduced. Clause 3.2.1 defines a radon probability area as one where tests show 1 per cent of existing dwellings are likely to exceed 200 Bq/m3, mapped in the Indicative Atlas of Radon in Scotland published July 2011 by the Health Protection Agency and the British Geological Survey on the UKradon website, with per-property radon risk reports available from the same source. Clause 3.2.2 requires protective work where a dwelling is to be located or extended on ground designated as a radon probability area or where radon is known to exist, so an extension in Scotland can trigger radon measures that an England-based note would attribute to Approved Document C.
- very strong RN-ONL4C3
Scottish Government (mygov.scot)
SCOTLAND, last updated 24 November 2025. Scotland has no building notice or full plans choice and no private registered building control approvers: a building warrant must be obtained from the local council's building standards department BEFORE work starts, and starting work without one when required is an offence punishable by a fine. A warrant is needed for building a new home, extending a home, building or removing load-bearing walls, changing roofs, external walls or other structural elements, converting a loft or garage into a room, and demolition. Applications go through the eDevelopment portal, and the page lists all 32 Scottish councils plus their building standards departments as the verifiers. This directly contradicts an England-based note that offers a retrospective regularisation route or a choice of approved inspector.
- very strong RN-27DUQW
The National Archives (legislation.gov.uk)
The full Act in 22 sections. Section 1 covers a new building on the line of junction, section 2 the rights of an owner over an existing party wall, section 3 party structure notices, section 4 counter notices, section 5 disputes arising under sections 3 and 4, and section 6 adjacent excavation and construction (the 3 metre and 6 metre notice rules). Sections 7 to 9 deal with compensation, rights of entry and easements, section 10 with resolution of disputes and the surveyors award, sections 11 to 14 with expenses, security for expenses and accounts, and sections 15 to 21 with service of notices, offences, recovery of sums and interpretation. This contents page is the index a note should link to when naming a particular section.
- very strong RN-3APQ6X
The National Archives (legislation.gov.uk), Acts of the Scottish Parliament
SCOTLAND, and there is no England equivalent: England relies on leases and service charges where Scotland legislates for flat ownership directly. Sections 1 to 3 fix tenement boundaries and pertinents by default, so ownership of the roof, close and solum is settled by statute rather than by title alone. Section 4 applies the Tenement Management Scheme in Schedule 1 wherever the title deeds are silent, and section 4A lets a local authority pay a share of scheme costs. Sections 7 to 10 abolish the common law of common interest for tenements and replace it with a statutory duty at section 8 to maintain any part providing support or shelter, a prohibition at section 9 on interfering with support or shelter, and a cost recovery right at section 10. Sections 11 to 15 set when liability for repair costs arises, bind successors at section 12, allow a Notice of Potential Liability for Costs at section 13 and give a former owner a recovery right at section 14. Sections 5 and 6 route disputes to the sheriff.
- very strong RN-BAHGYP
The National Archives (legislation.gov.uk), Scottish Statutory Instruments
SCOTLAND. Schedule 3 is Scotland's equivalent of England's exempt work and diverges sharply from it. Type 1 makes any work to or in a house warrant-exempt except work that increases floor area, demolishes or alters the roof, external walls or elements of structure, adversely affects a separating wall, changes the wastewater disposal system, or is to a storey more than 4.5 metres high. Types 3 to 5 exempt a detached single-storey building over 8 and up to 30 square metres, but not one within 1 metre of the house unless it is at least 1 metre from any boundary, not one containing a fixed combustion appliance or sanitary facility, and not a swimming pool deeper than 1.2 metres; for a flat or maisonette the separation is 3 metres. Type 6 exempts heating work below 50kW solid fuel, 45kW oil or 70kW net gas, but not work on a chimney, flue pipe or hearth, nor an oil storage tank over 90 litres.
- very strong RN-T7W376
The National Archives (legislation.gov.uk), Scottish Statutory Instruments
SCOTLAND. The instrument that sets Scotland's building standards, made under the Building (Scotland) Act 2003, and the reason England's Approved Documents do not apply north of the border. Regulation 3 exempts certain buildings and services, regulation 5 introduces the descriptions of work not requiring a building warrant, regulation 8 covers fitness and durability of materials and workmanship, regulations 9 to 12 set the building standards for construction, demolition, services and conversion, and regulation 16 provides for relaxations. Schedule 1 lists exempted buildings, Schedule 3 the warrant-exempt work and Schedule 5 the mandatory building standards that the Technical Handbooks expand.
- very strong RN-1H8UHK
UK Health Security Agency (UKradon)
Gives a floor-type and concentration decision table for remediation. For a solid floor under 500 Bq per cubic metre the recommended solutions, best first, are a radon sump or positive ventilation; for a solid floor over 500 the answer is a radon sump. For a suspended floor under 500 it is natural under-floor ventilation or positive ventilation; over 500, mechanical under-floor ventilation or natural under-floor ventilation. Warns explicitly that simple actions such as sealing around loft hatches, sealing large openings in floors and extra ventilation do not reduce radon levels on their own, and that completely sealing floors is difficult and can cause rot in wooden floors. Names an active radon sump fitted with a fan as the most effective method, working best under solid floors and under suspended floors where the ground is covered with concrete or a membrane. Advises contacting UKHSA for levels above 1000 Bq per cubic metre, and the local council Environmental Health Department for advice.
- very strong RN-IUO1B2
Welsh Government (gov.wales)
WALES. Most extensions require approval under the Building Regulations in Wales, with a limited set of exempt classes of new building and extension. The guide directs the reader to the separate Welsh quick guides for the elements an extension normally engages: doors and windows, drainage, electrics, external walls, internal walls, kitchens and bathrooms, and roofs. It confirms the Party Wall etc. Act 1996 applies in Wales. Note that a Welsh extension also triggers consequential improvements under regulation 28 as applied by the Welsh Approved Document L, an obligation England reserves for buildings over 1000 square metres.
- very strong RN-2AZXB8
Welsh Government (gov.wales)
WALES. Building regulations approval is required to convert a loft or attic into a liveable space, and the guidance covers houses no more than two storeys high, with more extensive requirements for flats, maisonettes and houses over three storeys. The regulations are applied to ensure the structural strength of the new floor is sufficient, that the stability of the existing roof is not endangered, safe escape from fire, safely designed stairs to the new floor and reasonable sound insulation between the conversion and the rooms below. A liveable space includes a spare bedroom used infrequently. On boarding out for storage, existing ceiling joists tie the pitched roof members together and support the ceiling below and were not designed for significant load, so laying flooring boards over them may itself require a building regulations application, a point an England-based note on loft boarding usually treats as exempt. The Party Wall etc. Act 1996 applies in Wales as it does in England.
- very strong RN-4FI6DR
Welsh Government (gov.wales)
WALES. Published 18 June 2026. New building regulations come into force in Wales on 1 JULY 2026, a different commencement from England's building control reforms, made by the Building (Higher-Risk Buildings Procedures) (Wales) Regulations 2025 and the Building etc. (Amendment) (No. 2) (Wales) Regulations 2025. The first introduces a requirement for approval before higher-risk building work can begin, known as Gateway 2, a building control approval application process, change control and mandatory reporting of safety issues during the work, a completion approval process known as Gateway 3, the golden thread of information, appeal procedures and transitional arrangements. The second sets roles, responsibilities and requirements for dutyholders involved in any controlled building work, so it reaches ordinary domestic projects and not only higher-risk buildings.
- strong RN-4PFJ8L
BRE Group
The catalogue of BRE Digests, Good Building Guides and reports that building professionals cite, with document numbers, authors, dates and prices, which lets a note reference the correct BRE publication rather than BRE in general. Titles include Rising damp in walls: diagnosis and treatment (DG 245, 2007, 15 pounds), Assessment of damage in low-rise buildings with particular reference to progressive foundation movement (DG 251, revised 1995, 15 pounds), Foundation movement and remedial underpinning in low-rise buildings (BR 184, 1991, 35 pounds), Recognising wood rot and insect damage in buildings 3rd edition (BR 453, 2003, 37.50 pounds), Radon: guidance on protective measures for new buildings including supplementary advice for extensions, conversions and refurbishment projects, 2023 edition (75 pounds), Site layout planning for daylight and sunlight: a guide to good practice (BR 209, 2022 edition, 75 pounds, superseding the 2011 edition), External fire spread: building separation and boundary distances (BR 187 2nd edition, 55 pounds) and Wind loads on roof-mounted photovoltaic and solar thermal systems (DG 489, revised 2014, 24 pounds). The BRE U-value Calculator is listed at 0 pounds plus VAT.
- strong RN-AWIY25
BSI (British Standards Institution)
STATUS: WITHDRAWN, and very recently: 27 March 2025. BS 4483:2005 was published 30 September 2005 and specified factory produced, machine welded steel fabric (mesh) sheets for reinforcing concrete, made from ribbed bar to BS 4449:2005 or, for the wrapping fabrics D49 and D98, from wire to BS 4482. It is the standard behind the A142, A193, A252 and A393 mesh references that every concrete slab and driveway note quotes. Because it was withdrawn in March 2025 this is a live correction: notes specifying A142 or A393 mesh to BS 4483 should be checked against the current specification, with product conformity now sitting under BS EN 10080 for weldable reinforcing steel. Catalogue page confirms number, title, publication date, withdrawal date and scope, and names D49 and D98 wrapping fabrics, but does not name the replacement standard.
- strong RN-2N8PYB
BSI (British Standards Institution)
STATUS: WITHDRAWN on 29 October 2025, a very recent change. BS 5266-1:2016 was published 31 May 2016 and gave the code of practice for the design, installation and wiring of electrical emergency lighting, covering three purposes: assisting occupants to leave a building in an emergency, protecting those who remain inside, and allowing operations to continue if normal lighting fails, including recommendations for areas with fixed seating. Its scope covers common access routes in blocks of flats but EXCLUDES single family dwellings, a distinction a note should keep when it tells a homeowner that emergency lighting is required. Because it was withdrawn in October 2025, any note citing BS 5266-1:2016 needs checking against the current edition. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.
- strong RN-A1LC5G
BSI (British Standards Institution)
STATUS: WITHDRAWN on 30 March 2010. BS 6399-1:1996 was published 15 September 1996, replacing BS 6399-1:1984, and gave the recommendations for dead loads, minimum imposed loads by activity type and vertical loading on protective elements such as barriers, for new buildings and structures, alterations and additions to existing ones, and existing construction on change of use (but not maintenance or replacement without a change of occupancy). The 1996 revision reorganised floor load classes around activity rather than occupancy and clarified reduction of imposed load by building height and loaded area. It was superseded by Eurocode 1, BS EN 1991-1-1:2002 with its UK National Annex, so any note quoting the familiar 1.5 kN/m2 domestic floor load or a loft storage load to BS 6399 is citing a standard withdrawn in 2010 and should cite BS EN 1991-1-1 instead. Note BS 6399-2 (wind) and BS 6399-3 (imposed roof loads, now BS 8683:2021) were part of the same withdrawn family. Catalogue page confirms number, title, dates, withdrawal and scope.
- strong RN-LTB81Q
BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS 8297:2017 was published 31 October 2017 and supersedes BS 8297:2000, which is withdrawn, and BS 8297:1995; note the title also changed, from Code of practice for design and installation of non-loadbearing precast concrete cladding to Design, manufacture and installation of architectural precast concrete cladding, so a note using the old title is quoting a superseded edition. It gives recommendations for architectural precast concrete units used as building cladding, as decorative elements or as permanent formwork, that is units supported by and fixed to a structural frame or wall to perform a cladding role, with particular attention to permanent and temporary movements and tolerances of the supporting structure and to verification of product quality. It excludes glass fibre reinforced concrete (GRC), small masonry units and the design of the supporting structure itself. Catalogue page confirms number, title, date, status, supersession and scope.
- strong RN-60JOUR
BSI (British Standards Institution)
STATUS: WITHDRAWN on 21 November 2025, superseded by BS 8524-1:2025. BS 8524-1:2013 was published 30 April 2013 and itself replaced PAS 121, which was withdrawn 31 July 2013. It specified requirements for the design, testing and classification of active fire curtain barrier assemblies installed to the recommendations of BS 8524-2, covering reliability and durability, fire resistance, smoke containment and impact resistance of the assemblies, their control devices and ancillary equipment, for curtains of any material. Its two stated functions are maintaining compartmentation against fire and smoke spread, and giving access to escape routes while preserving fire resistance and limiting smoke into protected corridors and shafts. Any note quoting BS 8524-1:2013 or BS 8524-2:2013 is now naming a withdrawn edition and should be updated to the 2025 parts. Catalogue page confirms number, title, publication and withdrawal dates and scope; the requirements are paywalled.
- strong RN-EBSCAK
BSI (British Standards Institution)
STATUS: WITHDRAWN on 29 June 2021, superseded by BS 9251:2021. BS 9251:2014 was published 31 October 2014 and gave recommendations for the design, installation and maintenance of fire sprinkler systems in domestic and residential occupancies, covering components, water supplies, commissioning, testing and modification of existing systems, with the aim of life safety plus property protection and firefighter safety benefits; it records that residential sprinklers can cut the water used to fight a home fire by upwards of 90 per cent. This matters for loft conversion notes, where a sprinkler or misting system is sometimes offered as an alternative to a protected stair: any note citing BS 9251:2014 is quoting a withdrawn edition and should cite BS 9251:2021. Catalogue page confirms number, title, publication date, withdrawal date and scope.
- strong RN-TG59SM
BSI (British Standards Institution)
STATUS: WITHDRAWN on 31 October 2015, superseded by BS 9991:2015 (and since by a further revision). BS 9991:2011 was published 31 December 2011 and itself superseded BS 5588-1:1990. It gave the code of practice for fire safety in residential buildings, covering dwellings, residential accommodation blocks for up to six people and sheltered and extra care housing, applying to new design and to material alterations, extensions and changes of use, across ten sections covering means of escape, stairs, firefighting access, active fire protection, construction, mechanical systems, ancillary accommodation and management. It excludes hotels, caravans, hospitals, care homes, detention facilities, hostels and houses in multiple occupation. This is the standard a loft conversion note reaches for when discussing protected stairs and escape windows, so citing the 2011 edition is citing a withdrawn one. Catalogue page confirms number, title, publication date, withdrawal date, supersession and scope.
- strong RN-XT8DUF
BSI (British Standards Institution)
STATUS: CURRENT. BS 9999:2017 was published 31 January 2017 and supersedes BS 9999:2008, which is withdrawn. It gives the code of practice for fire safety in the design, management and use of buildings, aimed at life safety for occupants and firefighters with property and business protection as secondary objectives. The 2017 revision added a design process flowchart, brought in watermist suppression systems, revised smoke and heat control guidance, added recommendations for fire curtain barriers and updated the shopping complex provisions. Crucially for a home renovation note, it EXCLUDES individual dwellinghouses, and has limited application to specialist buildings such as hospitals and places of lawful detention, so it is the wrong standard to cite for a house: use Approved Document B Volume 1 for dwellings and BS 9991 for residential buildings. Catalogue page confirms number, title, date, status, supersession and scope.
- strong RN-KTG0RI
BSI (British Standards Institution)
STATUS: WITHDRAWN on 30 April 2010, superseded by BS EN 14250:2010. BS EN 14250:2004 was published 6 January 2005 and specified the product requirements for prefabricated structural members such as trusses, beams and girders made of timber and assembled with punched metal plate fasteners, covering materials, strength, reaction to fire, timber sizing, moisture content, dimensional accuracy and joint requirements, plus evaluation of conformity and marking. This is the standard behind the trussed rafter roof that a loft conversion note has to explain cannot simply have its webs cut out, so it matters that the edition cited is current: a note quoting BS EN 14250:2004 is citing a withdrawn one. Design of the trusses themselves sits under BS EN 1995-1-1. Catalogue page confirms number, title, publication date, withdrawal date and scope.
- strong RN-KZE79J
BSI (British Standards Institution)
STATUS: WITHDRAWN on 1 June 2007. BS EN 519:1995 was published 15 October 1995 and set the requirements for machine strength graded structural timber and for the grading machines themselves, covering quality control, test methodology and acceptance criteria. It was superseded by the BS EN 14081 series, Timber structures. Strength graded structural timber with rectangular cross section, whose parts are BS EN 14081-1:2016+A1:2019 general requirements, BS EN 14081-2 machine grading type testing, BS EN 14081-3 machine grading factory production control and BS EN 14081-4. Any note that says timber is machine graded to BS EN 519 is quoting a standard withdrawn in 2007; the machine graded counterpart to visual grading under BS 4978 is now BS EN 14081. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.