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Boise Lumberyard › I-Joists

11-7/8" RFPI-20 I-Joist

Roseburg RFPI-20 stamped series on flange front view
Roseburg RFPI-20 stamped series on flange front view Polywrapped RFPI-20 11-7/8 inch engineered wood I-joist shown at angle with manufacturer label visible Roseburg RFPI-20 11-7/8 inch engineered wood I-joists stacked at Boise lumberyard with yard surface visible
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11-7/8" RFPI-20 I-Joist

11-7/8" RFPI-20 I-Joist
In Stock — Boise yard
$3.95 per linear foot
Bulk Pricing: As low as $3.32
Pieces  
Length  
✓
Boise Yard Pickup FREE
Pickup Timing: Calculating...
  • No order minimum for yard pickup.
  • Hours: Tue, Thu, Sat • 7:00 AM – 11:00 AM.
✓
Flatbed Site Delivery $175
Arrives as early as: Calculating...
  • $2,500 order minimum.
  • Delivered on Tue, Thu, Sat via Treasure Valley flatbed.

Boise Lumberyard

1200 Lake Hazel Ln
Boise, ID 83705

Phone Number:
208-283-6056

★★★★★ 5.0 · 17 Google reviews

View all Google reviews →

Bulk purchase pricing

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

Order total
Your price
$1,500–$4,999
Tier 1 discount
$3.75 / lf
$5,000–$12,499
Tier 2 discount
$3.63 / lf
$12,500+
Best public pricing tier
$3.32 / lf

Full house packages may qualify for deeper price discounts.

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Boise Yard

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Boise Lumberyard

1200 Lake Hazel Ln
Boise, ID 83705

Phone Number:
208-283-6056

★★★★★ 5.0 · 17 Google reviews

View all Google reviews →
Framing Lumber | Timbers & Posts | Pressure-Treated Lumber | OSB Sheathing | I-Joists | Rim Board | LVL Beams | Boards | House Packages

Product Description

11-7/8" RFPI-20 I-Joists are supplied through our Boise, Idaho lumberyard for multi-family framing throughout the Treasure Valley. This highly efficient 1-3/4" flange configuration provides clear-span structural support for everyday residential runs without adding unnecessary material bulk. They arrive flat and uniform, ensuring a level subfloor profile and cutting layout prep time. This series serves as a direct equivalent to Weyerhaeuser TJI-110 and Boise Cascade BCI-5000.

Specifications
  • Brand: Roseburg Forest Products
  • Depth: 11-7/8"
  • Flange Width: 1-3/4"
  • Series: RFPI-20
  • Certification: APA Rated Structural Component
Common Uses
  • Standard-span residential floor joist tracking for volume developments, light townhomes, and multi-family frames.
  • Lightweight roof framing and ceiling joists where easy on-site handling is preferred by installation crews.
  • Floor framing footprints requiring a standard 11-7/8" depth with excellent material cost control.
Contractor & Builder Notes
  • Standard Hangers: Face mount IUS1.81/11.88 or top flange ITS1.81/11.88.
  • Lightweight Job-Site Handling: The compact 1-3/4" flange layout makes these joists light and easy for crews to slide into position rapidly.
  • Fast Nailing Setup: Installs quickly over plate layouts using standard framing connectors or specified joist hangers.
  • Glue Adhesion: Keep the top flange dry and clean before running your subfloor glue bead to achieve a solid, quiet system.
Sales & Return Policy

30-Day Boise Yard Return Policy

Stock items bought directly from our local yard can be brought back within 30 days for an exchange or store credit. Please keep the following in mind:

  • Condition: Materials must be clean, uncut, and in completely resalable like-new condition.
  • Fees: There is no restocking fee.
  • Hauling: Bringing the materials back to our yard is the responsibility of the buyer.

See our full Sales & Return Policy for details.

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

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.

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