NEOBIOME

OT_158: Dowdell et al. (2016) — BRANZ SR351, NZ whole-building whole-of-life framework: datasheets for building LCA…

Properties4
typesource
source_typeother
year2016
topicsbuilding_habitat, methodology_frameworks, community_finance, nz_specific

9 min read

OT_158: Dowdell et al. (2016) — BRANZ SR351, NZ whole-building whole-of-life framework: datasheets for building LCA…

Source

https://www.branz.co.nz/buildingLCA — original source (opens in a new tab; the file is not redistributed)

Dowdell et al. (2016) — BRANZ SR351: NZ whole-building whole-of-life framework — datasheets to support building LCA

Partially serves RT_312 (the "BRANZ component-life table" it explicitly called for) — but only the BUILDING-FABRIC lines, and the actual per-component life table is an EXTERNAL Excel, not in this PDF

RT_312 asks for NZ / engineering-standard service lives for the params.ASSET_LIFE replacement reserve, naming an “IPWEA/NAMS or BRANZ component-life table” as the target (see D03 line-item, CR_050, sibling OT_110/RT_319). SR351 is the BRANZ half of that call — it publishes a Module B4 replacement datasheet of typical/min/max NZ building-component service lives and sets a 60-yr office building required service life. BUT (1) the report body reproduces only examples (bitumen-sheet roofing 22 yr [20–25]; concrete component 100 yr) — the full per-component table lives in an external Excel at branz.co.nz/buildingLCA (→ new RT); and (2) its scope is office-building fabric (Table 6: Services barely in scope), so it does not cover the mechanical/services lines RT_312 actually needs (DHW cylinders, AWTS, poly rainwater tanks, district-heat mains, V2H chargers). RT_312 is therefore advanced, not resolved. Figures read verbatim (pdftotext) from numbered sections → data_quality: high (authoritative BRANZ primary, all figures traced; not verified — single-source, not independently corroborated, matching the sibling BRANZ SR391/RT_283 convention in this batch).

Summary

BRANZ Study Report SR351 (Dowdell, Berg, Marston, Shaw, Burgess, Roberti & White, BRANZ 2016, ISSN 1179-6197, 47 pp) documents the methods behind a set of datasheets developed under Research Stream 3 (RS3) of the New Zealand whole-building whole-of-life framework, whose purpose is to enable consistent building life cycle assessment (LCA) — initial focus on early design of new-build offices, aligned to EN 15978. The report explains one datasheet per life-cycle module: A4 transport-to-site, A5 construction waste, B1–B7 required service life, B2 maintenance, B4 replacement, B6 operational energy, B7 water use, and C1 end-of-life waste. Its NI value is narrow and specific: it is a NZ-authoritative source of building-component replacement/service lives feeding the params.ASSET_LIFE reserve — but only for the building-fabric asset lines, because (a) the report body reproduces only illustrative figures (the full component-by-component life data is in an external downloadable Excel datasheet), and (b) the framework is scoped to office-building fabric (structure/enclosure/interior), not building services. It gives a NZ office required service life of 60 years (NZ Building Code B2.3.1(a) minimum 50 yr; Green Star 60 yr) and, as replacement examples, bitumen-sheet roofing 22 yr (min 20, max 25) and a concrete component 100 yr. It supersedes nothing in-corpus; it anchors the fabric side of the reserve and points to the Excel datasheet as the primary per-component table (a new RT).

Key claims

- claim: "Report identity & scope: 'New Zealand whole-building whole-of-life framework: Development of datasheets to support building life cycle assessment', BRANZ Study Report SR351, by David Dowdell, Brian Berg, Nick Marston, Patricia Shaw, John Burgess, Johannes Roberti and Brendan White; © BRANZ 2016, ISSN 1179-6197. Developed under Research Stream 3 (RS3) of a BRANZ programme to build a NZ whole-building whole-of-life LCA framework. 'Initial focus is on offices.' The report documents the methods behind datasheets covering: A4 transport to site, A5 construction-site waste, B1–B7 required service life, B2 maintenance, B4 replacement, B6 operational energy, B7 water use, C1 end-of-life waste — structured to EN 15978 (CEN, 2011b) and feeding the LCAQuick – Office tool."
  source_location: "Cover / Preface (p.i); §1 Executive summary (p.3–4); §2 Introduction module map (p.11)"
- claim: "Required service life of a New Zealand office building = 60 years, in the absence of a client brief requiring a stated alternative. 'clause B2.3.1(a) of the New Zealand Building Code sets an expectation that the life of a building will not be less than 50 years unless a shorter specified intended life is stated.' 60 years was adopted at a September 2013 BRANZ industry workshop as reasonable 'given that 50 years is a minimum durability requirement for structures of buildings and that buildings are inherently designed with greater resilience than this minimum'; GBCA and NZGBC have adopted a 60-year building life in Green Star. (For context: typical NZ accounting convention depreciates buildings at 2% flat = fully depreciated after 50 years.)"
  source_location: "§5 Modules B1 to B7 (use stage) office building required service life (p.17)"
- claim: "Module B4 replacement — estimated service life data is given as typical years with minimum and maximum where available. Worked example: '4421 Bitumen based sheet roofing may typically be expected to last 22 years before needing replacement, with a minimum of 20 years and a maximum of 25 years.' Replacement intervals are independent of the building's own life: 'a concrete component with a typical life of 100 years will exceed the typical office building service life of 60 years and has its estimated service life listed as 100 years.' Service life can vary with the material used (e.g. 4311 Profiled metal sheet roofing = steel / stainless / aluminium / copper / zinc, each different)."
  source_location: "§7 Module B4 replacement (p.22)"
- claim: "The detailed per-component replacement/service-life data is NOT reproduced in the report — it lives in an external Excel spreadsheet, 'NZ WBWLF – Module B4 replacement datasheet [version number]', freely downloadable from the BRANZ website at www.branz.co.nz/buildingLCA, organised by 4-digit (work section) CBI code. 'Replacement information has been compiled from New Zealand and international references and product literature. Replacement information was assessed against BRANZ materials knowledge to provide final figures.' Replacement caused by random/premature failure — accidents, storms, earthquakes — 'is not currently considered.' (The Module B2 maintenance data is likewise a separate downloadable Excel datasheet, with activity frequency in years: '1 means the activity is carried out yearly, and a 5 means the activity is carried out every 5 years'.)"
  source_location: "§7 Module B4 replacement (p.22); §6 Module B2 maintenance (p.19)"
- claim: "Scope constraint — the framework is office-building-FABRIC focused, so building-SERVICES assets are largely out of scope. Table 6 ('Work sections identified with potentially significant environmental impacts') is dominated by 1-digit categories 2 Site, 3 Structure, 4 Enclosure and 5 Interior; the only entry under '7 Services' is CBI 5323 'Suspended ceiling with services'. There are no plumbing / hot-water / mechanical / water-storage service-life entries in the report body."
  source_location: "Table 6 'Work sections identified with potentially significant environmental impacts' (p.39)"

Neobiome Intelligence relevance

This source was retrieved for RT_312 — sourced service lives for the params.ASSET_LIFE replacement reserve (audit AF-17, all lines assumed). It is the BRANZ component-life reference RT_312 named, and it advances that target for the building-fabric lines only; it does not close it.

  • What it delivers (building-fabric asset lives). SR351 is a NZ-authoritative anchor for building-fabric replacement/service lives: a 60-yr office building required service life (NZ Building Code 50-yr floor; Green Star 60 yr), and a published Module B4 replacement datasheet of typical/min/max component lives (compiled from NZ + international references + BRANZ materials knowledge). The report’s example figures — bitumen-sheet roofing 22 yr (20–25), concrete component 100 yr, metal roofing material-dependent — directly contextualise the fabric lines of the reserve. For the engine’s catchment structures = 30 yr assumption (roof + gutters + first-flush), this places 30 yr mid-range but roofing-material-dependent: a bituminous/membrane roof (22 yr) makes 30 optimistic, whereas long-run metal or concrete (up to 100 yr) makes it conservative. The 60-yr building-fabric envelope is a useful upper anchor for the longest-lived structural lines.
  • What it does NOT deliver (the services/mechanical lines RT_312 actually needs). The specific reserve lines — DHW cylinders (15), wastewater/AWTS (25), rainwater poly tanks + plumbing (30), district-heat mains (40), V2H chargers (15) — are building services / energy equipment, out of SR351’s office-fabric scope (Table 6). None have a life in the report body. So the sharp conflicts already on record stay open: CR_050’s Tier-3 trade-blog poly-tank 10–20 yr (which flags the engine’s rainwater 30 as optimistic if poly dominates) and electric HW cylinder 10–15 yr are neither confirmed nor refuted here; OT_110 already handled the reticulated-wastewater life (60–100 yr) but left on-site septic/AWTS tank life open.
  • The primary per-component table is one retrieval away. The report describes but does not reproduce the Module B4 replacement Excel datasheet (branz.co.nz/buildingLCA, by CBI code) — the actual table of NZ component lives. Retrieving that Excel is the concrete next step for the fabric lines (new RT below); the mechanical/services lines still want an IPWEA/NAMS-style infrastructure asset-life schedule or supplier warranties.
  • Provenance. Authoritative BRANZ study report (Building Research Levy funded); every cited figure (60 yr; 22/20/25 yr roofing; 100 yr concrete; 50-yr Building Code floor) read verbatim from numbered sections → data_quality: high (not verified: single-source BRANZ statements, not independently corroborated — the corpus verified bar; matches sibling BRANZ SR391 RT_283 draft). Not an AI-prepared source → no retrieval-provenance block.

Research targets

Documents to retrieve

  • RT_384 (NEW, placeholder — assign at write) — the BRANZ Module B4 replacement Excel datasheet. SR351 describes but does not reproduce ‘NZ WBWLF – Module B4 replacement datasheet’ (Excel, by 4-digit CBI code; typical/min/max component lives), downloadable at branz.co.nz/buildingLCA. Retrieve it for the actual per-component fabric lives feeding params.ASSET_LIFE (roofing, cladding, tanks-as-fabric, concrete). ⚠ Office-fabric scope — unlikely to hold DHW / AWTS / DH-mains / V2H lives.

Research gaps

  • RT_312 (ADVANCED, stays OPEN → this page). The BRANZ component-life reference RT_312 called for now exists in-corpus, anchoring the reserve’s building-fabric lines (office 60 yr; roofing 22 [20–25]; concrete 100 yr) — the engine’s catchment-structures 30 yr reads mid-range but roofing-material-dependent. Still unresolved: the mechanical/services lives the reserve mostly comprises (DHW 15, AWTS/wastewater 25, poly tanks + plumbing 30, DH mains 40, V2H 15), which are out of SR351’s office-fabric scope. Next: the Module B4 Excel (RT_384) for fabric, plus an IPWEA/NAMS infrastructure asset-life schedule (or supplier warranties) for the services lines.

Notes

  • Year. Cited as 2016 throughout (companion reports SR349/SR350 are Berg/Dowdell 2016; the Sept-2013 workshop predates it). The PDF’s embedded CreationDate (Apr 2020) is a re-export artefact, not the publication year.
  • BRANZ family in-corpus. Distinct from the other BRANZ sources held — OT_046 (ER86 low-carbon design), OT_047 (Bulletin 679 carbon footprint), OT_133 (Bulletin 677 roofs/H1), OT_137 (LR17946 housing performance), OT_036 (SR469 water use), OT_123 (SR501 new houses). SR351 is the whole-of-life / LCA-datasheet methodology report; no overlap.
  • Broader (non-RT_312) value. SR351’s whole-building LCA method and the B6 operational-energy / B7 water-use / C1 end-of-life datasheets are latent thesis-adjacent embodied-carbon / whole-of-life background (cf. OT_046/047, CR_049). Not developed here — this ingest is scoped to the RT_312 asset-life relevance (context: ni, feeds D03).

Connections

Links to

Sources (3): CR_049 · CR_050 · OT_110

EDT domains (1): D03: Water, Waste & Circular Systems

Referenced by

Sources (2): CR_050 · OT_110

EDT domains (1): D03: Water, Waste & Circular Systems

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