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11-7/8" RFPI-90 I-Joist

In Stock — Boise yard
$7.700 per linear foot

Available for pickup or delivery

Online orders are typically staged same day for fast, hassle-free pickup or on your selected pickup date.

Boise Lumberyard

1200 Lake Hazel Ln
Boise, ID 83705

★★★★★ 5.0 · 16 Google reviews

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Bulk purchase pricing

Applies to the entire order (mix & match across all products).

Order total
Your price
$500–$1,999
Tier 1 discount
$7.315 / lf
$2,000–$5,999
Tier 2 discount
$7.084 / lf
$6,000+
Best public pricing tier
$6.776 / lf

Full house packages may qualify for deeper price discounts.

Framing Lumber OSB I-Joists Rim Board LVLs House Packages

Product Description

The 11-7/8" RFPI-90 I-Joist is Roseburg’s highest-capacity RFPI series, specified in residential and commercial floor systems where span tables require maximum strength and stiffness within the RFPI product line.

RFPI-20 is an industry-standard substitute for Weyerhaeuser TJI-560 and Boise Cascade BCI-90.

APA-rated, lightweight, and dimensionally stable for predictable performance.

Stocked in Boise for immediate pickup or scheduled Moffett delivery.

Specifications
  • Depth: 11-7/8"
  • Flange Width: 3-1/2"
  • Series: RFPI-90
  • APA-rated engineered wood I-joist
Common Uses
  • Residential floor systems requiring higher load capacity or reduced deflection
  • Longer span conditions per manufacturer span tables
  • Engineered floor systems paired with LVLs and rim board
  • Single-family construction
Contractor & Builder Notes
  • Highest-capacity RFPI joist series selected when span tables demand maximum performance
  • Installed at 16", 19.2", or 24" on center per manufacturer span tables
  • Official span tables available in the Roseburg RFPI Residential Design Guide (PDF)
  • Always verify spans, loads, and layouts using manufacturer literature or the engineer of record

Delivery Options

  • Fast pickup at our Boise yard
  • Moffett job-site unload available
  • Combine with OSB, LVLs, I-joists, or additional framing lumber in one delivery

Return Policy

  • 100% store credit on all items returned in unused, like-new, fully resaleable condition.
  • Store credit can be used toward any future purchase and does not expire.

If you already have a material list

Email it to info@dynamiclumbersolutions.com for fast, accurate pricing.

Many customers save significantly when they price their full list with us.

No material list yet?

If your project is already moving forward and you need a material list, we can help with quantity takeoffs for active builds.