Prefabricated Structural Wood Members: PPI Trends and Bidding Guidance
For commercial framing subcontractors, general contractors, and interior estimators pricing roof trusses, floor trusses, and laminated veneer lumber (LVL), price volatility can quickly wipe out estimated margins. Tracking official producer price benchmarks provides an objective basis for cost modeling, bid qualifications, and contract escalation provisions.
What is the BLS index for prefabricated structural wood members?
The U.S. Bureau of Labor Statistics tracks wholesale prices for factory-built framing components under the Producer Price Index (PPI) commodity code WPU0822. Titled "Lumber and wood products-Prefabricated structural members, not seasonally adjusted," the series uses an index base period of 1982 = 100. The data reflects net selling prices reported by domestic manufacturers of wood trusses, prefabricated structural wood components, and engineered wood members. Estimators can review the raw figures directly via the U.S. Bureau of Labor Statistics PPI series WPU0822 portal.
Where do truss and LVL prices stand as of September 2026?
In September 2026, the index reached 459.0. This represents a month-over-month increase of +0.5% from the August 2026 level of 456.7. Over the previous twelve months, the index has experienced upward movement, rising +7.2% compared to September 2025. The table below outlines key historical comparison points published by the government.
| Reference Point | Index Date | Index Value | Change to Latest (September 2026) |
|---|---|---|---|
| Latest Month | September 2026 | 459.0 | N/A |
| One Year Earlier | September 2025 | 428.3 | +7.2% |
| Two Years Earlier | September 2024 | 448.3 | +2.4% |
| Five Years Earlier | September 2021 | 502.0 | -8.6% |
| Pre-Pandemic Baseline | January 2020 | 298.2 | +53.9% |
| Data Window High | April 2022 | 624.4 | -26.5% |
How have prefabricated wood prices trended over the long term?
Examining annual averages illustrates the shift in component pricing over the past decade:
- 2016: 237.6
- 2017: 255.5
- 2018: 299.2
- 2019: 295.6
- 2020: 338.4
- 2021: 498.3
- 2022: 582.0
- 2023: 476.6
- 2024: 452.7
- 2025: 432.6
- 2026: 447.2 (calculated from January through September)
Within the entire January 2016 to September 2026 data window, the lowest monthly value recorded was 232.3 in January 2016. In contrast, the market peaked at 624.4 in April 2022. While September 2026 remains -26.5% below that peak, it sits +53.9% higher than the January 2020 level of 298.2. Across the last 13 months, the monthly progression was: September 2025 at 428.3; October 2025 at 419.9; November 2025 at 424.2; December 2025 at 420.6; January 2026 at 421.9; February 2026 at 432.7; March 2026 at 436.2; April 2026 at 445.8; May 2026 at 451.2; June 2026 at 458.1; July 2026 at 463.5; August 2026 at 456.7; and September 2026 at 459.0.
Why do estimators need to watch index revision schedules?
Values for this series are not seasonally adjusted. Crucially for contract administration, recent months are preliminary and subject to revision for four months following their initial release. An estimator or project manager calculating an adjustment based on preliminary numbers must verify whether retroactive updates apply or establish contract language confirming that initial monthly releases serve as the final settlement figure.
How should estimators use this data in bids and escalation clauses?
Because structural wood member fabrication requires substantial shop drawing lead times, weeks or months often elapse between bid day and purchase order commitment. Incorporating transparent escalation clauses protects both the subcontractor and the project budget:
- Cite the specific commodity series: Rather than referencing a general lumber metric, specify BLS commodity code WPU0822 in your written proposal terms. To structure these parameters cleanly, review Bid Exclusions and Clarifications: How to Write a Proposal That Protects You.
- Establish a base month: Tie the quote to the PPI value published for the month of bid submission.
- Document billing adjustments clearly: When extended procurement schedules trigger index changes, utilize published movements as third-party documentation. For practical guidance on securing compensation for adjusted project scopes, see Pricing Change Orders: A Contractor's Guide to Getting Paid for Extra Work.
You can track updated monthly readings directly on the U.S. Bureau of Labor Statistics commodity series WPU0822 release page.
Sources
U.S. Bureau of Labor Statistics, Producer Price Index series WPU0822
Published October 28, 2026. No affiliate links on this page. Facts come from the sources linked above; check them for updates.