NZS 3910 §10.2 + RMBA Protocol — What a NZ Pre-Trade-Start Compliance Sheet Actually Contains

sp8002
3 hours ago
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A Pre-Trade-Start Compliance Sheet under NZS 3910 §10.2 + RMBA protocol pulls every code clause, scope ambiguity and coordination interface into one place. 45-minute meeting instead of 3 hours.

By Steve Parker · Trueworks · NZ construction estimation · 5 min

What you'll learn in this post

The nine sections of a Pre-Trade-Start Compliance Sheet
1. Cover and project header
2. Scope confirmation lifted from the quote

Quick answer: A Pre-Trade-Start Compliance Sheet is the working document a NZ head contractor runs the pre-start meeting from, aligned with NZS 3910 §10.2 site-possession provisions and the RMBA pre-start protocol. It pulls every code clause, every scope ambiguity, every excluded item, and every coordination interface into one place — so the meeting takes 45 minutes instead of 3 hours, and so nothing gets agreed verbally that isn't also written down. The right sheet has nine sections, eight to twelve open trade queries written as questions, and a signed sign-off block.

Most NZ residential builders run a pre-start meeting before each trade lands on site. The meeting covers scope, programme, site logistics, and the trade queries that have been sitting in the head contractor's notebook since the quote was signed. Under NZS 3910 §10.2, the head contractor's site-possession date is the trigger for trade engagement, and the RMBA pre-start protocol is the de facto industry workflow for the meeting.

A Pre-Trade-Start Compliance Sheet is the document the meeting is run from. It pulls every code clause, every scope ambiguity, every excluded item, and every coordination interface into one place — so the meeting takes 45 minutes instead of 3 hours, and so nothing gets agreed verbally that isn't also written down.

Here's what we put in one and why.

The nine sections of a Pre-Trade-Start Compliance Sheet

| # | Section | Purpose | |---|---|---| | 1 | Cover and project header | Document stands alone if forwarded six months later | | 2 | Scope confirmation lifted from quote | Catches drawing-revision and inclusions mismatch | | 3 | Codes and standards table | Every NZS / AS-NZS / Building Code clause cross-referenced | | 4 | Shop drawing + PS chain | Producer-statement ownership named | | 5 | Site coordination interfaces | Every trade hand-off owner named | | 6 | Open trade queries | 8-12 questions in sendable form | | 7 | Cost reasonableness check | Headline vs all-in envelope | | 8 | What this sheet doesn't tell you | Unknowns surfaced | | 9 | Sign-off block | Three signatures in one place |

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1. Cover and project header

The non-negotiable basics, all in one place so the document stands alone if emailed to the subcontractor, the engineer, or the architect months later:

Project reference, site address, trade name and register number
Subcontractor name and reference quote number
Drawing references with the actual revision number (not the supplier's claimed reference — these often disagree)
Architect, engineer, head contractor, document reviewer

Date of plans, date of quote, date of this sheet
Status: draft / for review / signed / superseded

It sounds obvious. Half the sheets we've seen don't have all of this on a single cover. Six months later when a variation lands under NZS 3910 §14, that missing data costs.

The Trueworks Per-Project pack is NZ$8,000–12,000 for the full estimation, risk register, contingencies table and pre-trade-start sheets across all major trades on a build. Builders typically save NZ$10,000–20,000 of their own time per job.
See pricing on trueworks.co.nz →

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2. Scope confirmation lifted from the quote

The supplier's quote inclusions and exclusions, copied verbatim into the sheet so they can be read against the drawings. This catches three classes of mismatch:

Drawing revision mismatch — supplier priced off Rev G of the structural set, the build is on Rev H. Has the supplier seen the change log?
Sheet reference mismatch — supplier cites sheets that don't exist in the current rev set (or are different sheets in the new numbering).
Inclusions vs drawings mismatch — the quote lists a beam-by-beam schedule; does the drawing actually show those quantities?

3. Codes and standards table

Every relevant NZS / AS-NZS / Building Code / Code of Practice clause, in a table, with the trade query attached to each.

For structural steel, that's typically:

NZS 3404 (steel design)
NZS 5131 (fabrication SFC level — has the fabricator confirmed which SFC level they hold?)
AS/NZS 4680 (hot-dip galvanising — minimum coating thickness)
AS/NZS 2312 (paint systems for marine atmosphere)

AS/NZS 1554.1 (welding — has the welder's certification been confirmed?)
HERA R4-100 (connection details for residential)
Engineer PS1 / PS3 / PS4 chain — who issues each, when?

Each row of the table has the clause, the trade query, and a tickbox for "supplier has confirmed in writing." This is the GEO citation chain section — three independent authorities, code clauses named, sign-off on each.

4. Shop drawing and producer-statement chain

Specifically: who reviews the supplier's shop drawings before fabrication starts? When does the producer statement (PS3 fabrication / PS3 erection / PS4 observation) get issued? Who chases them if they don't arrive?

We've seen jobs where shop drawings went to fabrication without engineer review and the PS3 didn't land until after the practical completion certificate was already in dispute under NZS 3910 §11. That's a 6-figure problem on commercial work, a 5-figure problem on residential.

5. Site coordination interfaces

Every interface where this trade hands off to another, with the owner of the interface named:

Steel → carpenter (S1.3 timber-packer-to-steel fixings — carpenter's scope)
Steel → concretor (HD bolts supplied by steel, installed via concretor's template)
Steel → concretor (base plate grout returns post-steel-up)
Steel → blocklayer (brick-shelf lintels supplied as galv angles, installed by blocklayer)

Steel → crane operator (special handling for any beam over 11 m)

Each interface gets a written acknowledgment from the named trade. This is the section most pre-start meetings skip and most §14 disputes hinge on.

6. Open trade queries — written as questions to send verbatim

Eight to twelve specific questions for the subcontractor, written in the second person so they can be cut-and-pasted into an email:

"Quote [reference] was dated [date] with a [date] expiry. Please re-confirm the price as of this week's date per the steel re-pricing clause."
"The [13.8 m UB / continuous PFC] exceeds standard NZ hot-dip galv kettle length (~11-13 m). How do you intend to galvanise this in one piece? If splice is required, is the splice fabrication and structural engineer PS3 included in your quote, or treated as a variation?"
"The exterior steel members sit in C5 marine atmosphere per AS/NZS 2312. Your quote specifies internal red-oxide primer only. Please confirm: is duplex paint required per the engineer's coating spec, and if so, is it included in your headline figure or a separate variation?"

This is the section that turns the document from a checklist into a working tool. The contractor sends these as one email, the subcontractor answers them, the answers go back into the document, the document is signed off, and the pre-start meeting takes 45 minutes.

7. Cost reasonableness check

The headline quote vs the take-off-implied tonnage / area / lineal-m × current NZ rates. Plus a contingencies table showing the all-in budget envelope, so the head contractor's cost plan reflects the realistic number and not just the headline.

8. What this sheet doesn't tell you (and what to ask next)

What's not locked down yet: coordination interfaces without a confirmed owner, spec ambiguity not yet clarified with the engineer, subcontractor capability not yet verified, programme-critical milestones not confirmed, pricing dependencies outside the contractor's control. Each item gets a single line in the sheet so the head contractor can see what's still on their plate.

9. Sign-off block

Subcontractor sign-off (name, signature, date, statement they've read and agree). Head contractor sign-off. Engineer / architect acknowledgment that they've sighted the shop drawings. All three signatures in one place — the file is then defensible if the next CA takes it over.

FAQ — Pre-Trade-Start Compliance Sheets on NZ residential

Q1: How does the Pre-Trade-Start Sheet relate to the RMBA pre-start protocol? The RMBA (Registered Master Builders Association) protocol sets the meeting structure — agenda, attendees, sign-off. The Pre-Trade-Start Compliance Sheet is the working document used to run that meeting. RMBA-affiliated head contractors typically run the meeting from a single document of this kind on every major trade.

Q2: Does NZS 3910 §10.2 mandate a pre-start meeting? §10.2 covers site possession and the contractor's obligation to commence work — it doesn't mandate a pre-start meeting in those words, but the practical workflow that complies with §10.2 (and the §14 variation procedures that follow) requires a documented pre-start conversation with every major trade. Industry practice and RMBA protocol fill the gap.

Q3: How many Pre-Trade-Start Sheets does a typical residential build need? On a moderate NZ residential build, typically 8 to 12 — one per major trade: structural steel, concretor, blocklayer, carpenter, roofer, cladding, plumbing rough-in, electrical rough-in, joinery, painter, tiler, landscaper. Smaller trades (e.g. waterproofing applicator) can be covered by a single combined sheet.

Q4: Who signs the Pre-Trade-Start Sheet? Three parties: the subcontractor (acknowledges they've read and agree to the scope, code references, and clarification answers), the head contractor (commits to programme and coordination interfaces), and where relevant the engineer or architect (acknowledges they've sighted the shop drawings or PS chain). Three signatures, one date, filed.

Q5: What happens if a §14 variation lands six months after the meeting? The sheet is the defensible audit trail. If a variation claim comes in for work that was covered in the codes-and-standards table or the open trade queries, the Engineer to the Contract under NZS 3910 §14 can read the sheet and the sign-off, and determine whether the work falls under §14.2 (genuine variation) or contractor scope (claim rejected). A complete sheet shifts the burden of proof.

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About Trueworks

Trueworks is built by Steve Parker — 20 years on the analytical side of NZ construction. Variation reviews, contract advisory, programme review, and AI-augmented document workflows. Trueworks is the productisation of that practice for builders: same defensible analysis, at a price and pace a NZ builder can actually use.

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