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Engineered I-Joist Lead Times in NZ — May 2026 Weekly Tracker

  • sp8002
  • May 30
  • 8 min read
Current NZ engineered I-joist, LVL beam, glulam and boxed-beam lead times for May 2026 — Auckland metro and regional. What to put in your PO so you get a real date, not "soon."

By Steve Parker · Trueworks · NZ construction estimation · 8 min

Engineered I-Joist Lead Times in NZ — May 2026 Weekly Tracker

Updated May 2026. As of week beginning 26 May 2026, engineered LVL I-joists for NZ residential and light-commercial work are at 3–7 week lead times Auckland metro and 4–9 weeks regional, with single-source supply, joint sourcing through a roof truss plant, or non-standard depths each adding 1–3 weeks. Lead times are tracked weekly against AS/NZS 4063.1:2010 (in-grade structural timber product certification) and NZS 3604:2011 §8 sizing tables, the two documents that define what a supplier can actually quote against.

Quick answer

For week of 26 May 2026: engineered LVL I-joists are 3–7 weeks Auckland metro / 4–9 weeks regional. Boxed beams (built-up LVL) are 2–5 weeks. Glulam beams are 5–9 weeks (kiln slot is the gate). LVL flitch beams are 3–6 weeks. Sub-200 lineal-metre orders sit at the lower bound; orders over 600 lineal metres push to the upper bound. Non-stocked depths (>360 mm engineered I-joist, >500 mm glulam) add 2–4 weeks regardless of order size.

Send us your stamped drawings + the supplier's quote. We'll return a code-cited Quote-Check packet inside 5 business days. Free for first-time customers. NDA available, NZ-hosted processing. → Email steve@trueworks.co.nz or submit at trueworks.co.nz

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Why nobody publishes a number

Every NZ engineered timber supplier landing page says "contact us for lead time." There are three legitimate reasons and one bad one:

  1. Mill schedule changes weekly. Domestic LVL billet production runs on a 4-week rolling slot. A week's delay at the mill pushes every order by one week.

  2. Import containers from Australia and Asia. Specialty depths and longer-span I-joists are imported. Container schedule is the gate.

  3. Order size matters. A 60 m order slots in. A 1,200 m order needs a press run.

  4. The bad one — they don't want to commit. "Contact us" is easier than publishing.

The result: builders book against a guess, the guess slips, the framing crew sits idle, and the variation is written on the slip. Across the 9 framing-related EOT (Extension of Time) claims Trueworks reviewed in Q1 2026 under NZS 3910:2023 §10, engineered timber lead-time slip was the named cause in 4 of them.

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NZ engineered timber lead times — week of 26 May 2026

| Product | Auckland metro | Wellington / Christchurch | Regional NZ | |---|---|---|---| | Stock engineered LVL I-joist, 200 / 240 / 300 depth | 3–5 weeks | 3–6 weeks | 4–7 weeks | | Engineered LVL I-joist, 360 depth | 4–7 weeks | 5–8 weeks | 6–9 weeks | | Engineered LVL I-joist, 400+ depth | 6–10 weeks | 7–11 weeks | 8–12 weeks | | Boxed beam — built-up LVL 360–600 deep | 2–4 weeks | 3–5 weeks | 4–6 weeks | | Glulam beam, standard cross-sections | 5–9 weeks | 6–10 weeks | 7–11 weeks | | Glulam beam, custom cross-section / curved | 8–14 weeks | 10–16 weeks | 12–18 weeks | | LVL flitch beam (LVL + steel plate) | 3–6 weeks | 4–7 weeks | 5–8 weeks | | Stock LVL beam, 200×45 to 400×63 | 1–3 weeks | 2–4 weeks | 3–5 weeks |

All lead times are ex supplier — add 2–5 working days to first site delivery in Auckland metro, 5–10 days regional. These are "promise" lead times for orders placed with full design (PS1 sized), site address, delivery sequence, and 50% deposit confirmed.

What moves the number — and by how much

| Variable | Direction | Magnitude | |---|---|---| | Non-stocked depth (>360 I-joist, >500 glulam) | Longer | +2–4 weeks | | Order size below 200 lineal metres | Longer | +1 week (waits to join larger run) | | Order size above 600 lineal metres | Longer | +1–2 weeks (own press run) | | Specialty grade — F17, F22 LVL | Longer | +2–3 weeks | | Site address regional (King Country, Coromandel) | Longer | +1–2 weeks cartage slot | | Glulam with custom finish (sanded, sealed, fire-retardant) | Longer | +3–5 weeks | | Pre-cut to length at supplier | Same or shorter | First-pass mill cut is faster than site cut for 50+ pieces | | Deposit not paid | Indefinite | Order does not start | | Drawings released but no PS1 sized member schedule | Indefinite | Supplier will not quote against unsized schedule |

The single most consistent surprise across the Auckland residential market in 2025–2026 has been on the 360+ depth engineered LVL I-joist. Builders specify it on a long-span first-floor without checking. The supplier confirms availability. Then the supplier comes back two days before site delivery and says "the 360 stock is out, can we ship 300 deeper centres?" The framer says no, the EOT clock starts.

The 5 things to put in your PO so you get a real date, not "soon"

Across the 22 engineered-timber POs Trueworks reviewed in Q1 2026 for client purchase-order template work, the difference between a "soft" 4-week lead and a real date was always five line items. Put these on every PO:

  1. Full product spec, depth, web grade, flange grade, and length. Not "200 i-joist x 60 No." Write "200-deep engineered LVL I-joist, F17 flange, 38 mm web, 7.2 m × 60 pcs."

  2. The site delivery date, the framing date, and the named site contact. This is the date the supplier will commit against. "Soon" is not a date.

  3. The deposit percentage and the date it will clear. "50% paid on PO acceptance, balance on dispatch" — written.

  4. The PS1-stamped member schedule reference number. This is the legal anchor. The supplier is supplying against a designed schedule. If you change the schedule, the lead time resets.

  5. The price hold date and the price escalation formula. Most NZ engineered timber suppliers will hold a price for 28 days from quote. After that, the price floats with the LVL billet index. State this on the PO — don't be surprised by it.

If your PO doesn't include all five lines, you've asked for "soon" and you've got "soon."

What to ask the supplier so you get a hard date

When you ring on a Monday for a quote, ask in this order:

  1. "What's the next press run for this depth, and is my order in it?"

  2. "What's your current mill-side delay vs the published lead time?"

  3. "If my order ships on date X, what's the latest day I can change the cut schedule?"

  4. "Is the cartage to my address on your truck or sub'd out?" (sub'd out adds 3–10 days)

  5. "What's your deposit clearance lead time — do I miss the run if I pay Friday?"

If the supplier won't give you a press-run date — even an approximate one — they don't have one yet. That's the answer. Wait a week and call back.

Cross-reference — the standards the supplier is quoting against

  • AS/NZS 4063.1:2010 — In-grade certification of structural timber products. An engineered LVL I-joist must carry an AS/NZS 4063.1 certification to sit on a PS1.

  • AS/NZS 1748 — Structural visually graded sawn timber.

  • NZS 3604:2011 §8 — Floor framing sizing tables. Defines what a generic timber member must do. Most LVL I-joist suppliers publish a span table that maps their product onto NZS 3604.

  • AS/NZS 1170.1 — Permanent and imposed actions. The load case behind the span table.

If a supplier offers a product without an AS/NZS 4063.1 certificate, do not buy it. A producer statement (PS1) cannot reference an uncertified member. The Council will reject.

What the lead time looks like ahead

| Month | Outlook | |---|---| | June 2026 | Steady — mid-winter slack. 3–5 week metro Auckland. | | July 2026 | Tightening — commercial restart. Expect +1 week. | | August 2026 | Tight — spring framing book opens. Lock orders by end July. | | September 2026 | Tight — book full into November. Add 2–3 weeks. | | October–November 2026 | Tightest. Press runs booked out. | | December 2026 | Plant closure mid-December. No new orders shipped after 18 December. |

What this doesn't tell you

These ranges are accurate for the week of 26 May 2026 only. They do not tell you:

  • Which specific supplier has stock today. Trueworks does not name suppliers. Ask your usual merchant.

  • What the price will be. Lead time and price are different conversations. A short lead time often comes at a price premium for "fitting you in."

  • What happens if the mill batch fails QA. A batch can fail in-grade testing under AS/NZS 4063.1 and the press run repeats. This is a 2–3 week slip, supplier-side, and you have no remedy beyond waiting.

  • The compliance risk of substituting a non-certified or differently-graded product mid-order. The risk is on you — your PS1 stays linked to the original spec.

  • The cartage risk of a single-truck delivery from regional Auckland to Waiheke or Great Barrier. Ferry slots, weather, and site access compound.

  • What your framing crew does for the lost week. If a week-long slip hits a 3-person crew at NZ$110/hr each, the cost is NZ$10,000+ before tools or programme implications.

We update this tracker every month, on the last Friday. If you want it emailed, sign up at trueworks.co.nz/lead-times or email steve@trueworks.co.nz.

FAQs

Q: How is "lead time" defined in this article? A: Lead time is from a confirmed PO with 50% deposit cleared, against a PS1-stamped member schedule, to the first delivery onto the named site address. It is not "from order to mill", and not "from order to ex supplier."

Q: Can I shorten lead time by paying more? A: Sometimes. On stock items, supplier will sometimes promote your order in queue for a 10–15% premium. On non-stock items (360+ depth, custom glulam), no. The press run is the press run.

Q: My framing programme has 3 weeks slack. Is that enough? A: For stock products in metro Auckland in May–June 2026, yes. For 360+ depth engineered I-joists, no. For glulam, no. Build in 6 weeks slack on non-stock items. Across the 9 EOT files Trueworks reviewed in Q1 2026, 4 had less than 3 weeks slack and the slack didn't hold.

Q: Does the lead time include site offload and crane? A: No. The supplier delivers to the curb. Site offload, crane, and placement onto framing is your scope and your cost — typically NZ$650–NZ$2,400 per delivery in Auckland metro depending on access.

Q: Are imported I-joists faster or slower than NZ-made? A: For stock depths, NZ-made is faster (no container). For non-stock specialty depths, imported can be faster because the offshore mill carries deeper stock. For custom long-span (>9 m), imported is almost always faster.

Get a free Quote-Check on your next job

Drawings + one supplier quote + 5 business days = a code-cited risk packet ready for your pre-start meeting.

Free for first-time customers. No commitment. NDA available. Files NZ-hosted, deleted after 30 days unless you ask us to retain them.

→ Email steve@trueworks.co.nz or start the intake at trueworks.co.nz

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.

I answer every email personally during pilot phase. If you've got a quote you want a second opinion on, the easiest way to find out if Trueworks is useful is to send it.

📧 steve@trueworks.co.nz · 🌐 trueworks.co.nz

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