AJS Joists
Strength and Consistency You Can Count On
An easy-to-install solution for high-performance floors and roofs available throughout the Northeastern US and Eastern Canada.
Product Overview
AJS® Joists have solid-sawn flanges, made with proprietary MSR (machine stress rated) graded lumber to help ensure the strength and consistency you can count on. The proven web stock and approved structural adhesives provide quality, high-performance floor and roof systems at a cost-competitive with traditional construction materials. With six series available, this complete line of products is well-suited for your next home, multifamily, and light commercial project.
Available in six series: (2 ½″ flange) 140, 150, 20, 190, and deep depth (3 ½″ flange) 25 and 30.
AJS Joist Benefits
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Available Depths:
Deeper Depths – AJS 25 and AJS 30
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“I consistently hear from our framer and trade partners that Boise Cascade is always the preferred vendor. It’s about product availability without delay, competitive pricing, engineer support as well as value engineering to produce efficient layouts and plans. They just continue to be the preferred vendor and in turn my preferred vendor because of the relationship value they provide.”
Vice President - National Purchasing & Architecture
High Performance Results
AJS Joists’ longer lengths mean simpler floor/roof layouts and higher floor performance. Plus, AJS joists are consistent from piece to piece, helping to keep floors flat and quiet making customers happy.
Easy Installation
AJS Joists are lightweight and feature solid lumber flange for easy handling and installation. The joists’ 1-1/2″ pre-stamped knockouts and allowances for on-site hole cutting provide for easy routing of wiring, HVAC, and plumbing through the web, speeding construction and reducing labor costs.
All AJS Joists are field trimmable without the need for special tools or skills, and eased edges mean fewer splinters on the job.
Product Literature
| Title | Resource Type | Share | hf:tax:resource-category | hf:tax:region | |
|---|---|---|---|---|---|
| Reinforcement of Boise Cascade Floor Framing Supporting Guards – IJ-36 | Tech Note U.S. | View | tech-note-u-s | ||
| AJS 24 FMJ Joist Product Overview – JOI-E1901 | Product Flyer, Safety & Fire | View | product-flyer safety-fire | ||
| Flame Spread Classifications – GE-13 | Tech Note U.S. | View | tech-note-u-s | ||
| AJS Joist Product Overview – JOI-1610 | Product Flyer | View | product-flyer | ||
| Non-Load Bearing Partition Wall Parallel Between Joists – IJ(CAN)-31 | Tech Note Canada | View | tech-note-canada | ||
| Analyzing Multiple Web Holes as a Single Encompassing Hole – IJ-24 | Tech Note U.S. | View | tech-note-u-s | ||
| Canadian Installation Guide – MTP-C7001 | Installation Guide | View | installation-guide | canada-east canada-west | |
| Canadian Fire and Design Installation Guide – MTP-7050 | Installation Guide, Safety & Fire | View | installation-guide safety-fire | canada-east canada-west | |
| Small Notch in Top BCI and AJS Joist Flange Repair – IJ(CAN)-12 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Multiple Ply BCI or AJS Joist Members – IJ(CAN)-13 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joist Fire/Bevel-Cuts – IJ(CAN)-10 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Lapped BCI or AJS Joist Bearing at Interior Supports – IJ(CAN)-9 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Split BCI or AJS Joists at Interior Supports – IJ(CAN)-8 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Half Notched BCI or AJS Joist Top Flange Near Bearing Repair – IJ(CAN)-4 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joist Hole Repair Close to End Bearing – IJ(CAN)-3 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joist – 1/2” Deep Notch Top Flange Near Bearing – IJ(CAN)-28 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Minor Cuts/Crushing of Boise I-Joist Flanges – IJ(CAN)-1 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Location and Shapes of AJS and BCI Joist Web Holes – IJ(CAN)-24 | Tech Note Canada | View | tech-note-canada | canada-east | |
| AJS and BCI Joist Knockout and Field-Cut Web Hole Location Provisions – IJ(CAN)-20 | Tech Note Canada | View | tech-note-canada | canada-east | |
| New BCI or AJS Joist Installed for Damaged Joist – IJ(CAN)-19 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Repair Details for Split in the Flange of a BCI or AJS Joist – IJ(CAN)-14 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joist, Versa-Lam LVL and BOISE GLULAM Exterior Exposure Policy – GE(CAN)-4 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Weights of Building Materials – GE(CAN)-1 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Weights of Building Materials – GE-1 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Web Holes Cut with SawTek Router – IJ-20 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Temporary Storage of Gypsum Board on BCI and AJS Joists – IJ-7 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Temporary Storage of Gypsum Board on BCI and AJS Joists with Shoring – IJ-19 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Requirements for Additional BCI or AJS Joists to Support Parallel Partition Walls – IJ-22 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Web Hole Types in BCI Joists – IJ-31 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| AJS FMJ 24 Joist for Fire Protection of Floors Installation Guide – IJ-30 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI Door and Window Header Load Table – IJ-9 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist Rafter Connection to 2x Ceiling Joists – IJ-6 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist Rafter Cut Length Calculation – IJ-10 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist Knockout and Field cut Web Hole Location Provisions – IJ-27 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joists and Blocking Panels Shear Transfer Equivalency – IJ-1 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist, Versa-Lam LVL & BOISE GLULAM Exterior Exposure Policy – GE-4 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist Web Stiffener Requirements – IJ-16 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist Nailed Connection to Hip or Valley Beam – IJ-5 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist Slope-Cut Reinforcement – IJ-3 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI and AJS Joist Flange Nailing Splits at Bearing Supports – IJ-21 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Canadian AJS 140/20/25 Joist Specifier Guide – French – JOI-CE1600 | Product / Specifier Guide | View | product-specifier-guide | canada-east | |
| Canadian AJS Joist Commercial Specifier Guide French – MTP-CF7610 | Multifamily/Light Commercial | View | mflc | canada-east | |
| Canadian AJS 140/20/25 Joist Specifier Guide – JOI-CE1600 | Product / Specifier Guide | View | product-specifier-guide | canada-east | |
| AJS 150/190 Product Guide | Product / Specifier Guide | View | product-specifier-guide | us-east | |
| AJS Joist Commercial Guide – MTP-E7610 | Multifamily/Light Commercial | View | mflc | us-east canada-east | |
| Weights of Building Materials – GE(CAN)-1 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Flame Spread and Fire Endurance: Surface Coatings – GE(CAN)-2 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Allowable Nail Spacing & Design for AJS and BCI Joists and Versa-Lam LVL – GE(CAN)-3 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI / AJS Joist, VERSA-LAM & BOISE GLULAM Exterior Exposure Policy – GE(CAN)-4 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Joist Ceiling Framing Over an Indoor Pool – GE(CAN)-5 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Formaldehyde & Engineered Wood Products – GE(CAN)-15 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Lateral Bracing of Joists and Beams – GE(CAN)-16 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Vertical Load Transfer over Bearings within BC FRAMER & BC CALC – GE(CAN)-23 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Pressure and Topical Applications and Treatments – GE(CAN)-25 | Tech Note Canada | View | tech-note-canada | canada-east canada-west | |
| Splits in the Flange of BCI or AJS Joists: Repair Details – IJ(CAN)-14 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Designing for Ceramic or Stone Tile Floor Finishes – IJ(CAN)-15 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Interior Connection: Notched Post Glued and Bolted to Rim Joist – IJ(CAN)-16 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Headout Detail for Damaged BCI or AJS Joists – IJ(CAN)-17 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Horizontal Diaphragm Designed with BCI Joists – IJ(CAN)-18 | Tech Note Canada | View | tech-note-canada | canada-east | |
| New BCI or AJS Joist Installed for Damaged – IJ(CAN)-19 | Tech Note Canada | View | tech-note-canada | canada-east | |
| AJS or BCI Joists Knockout and Field-Cut Web Hole Location Provisions – IJ(CAN)-20 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Suspended Ceiling Details for AJS or BCI Joists – IJ(CAN)-21 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Sprinkler Attachment Details – IJ(CAN)-22 | Tech Note Canada | View | tech-note-canada | canada-east | |
| AJS or BCI Joists to Steel Beam Hanger Connections – IJ(CAN)-23 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Double AJS Joist Without Filler Block Detail – IJ(CAN)-25 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Versa-Lam LVL Installed for Damaged AJS or BCI Joists – IJ(CAN)-26 | Tech Note Canada | View | tech-note-canada | canada-east | |
| AJS and BCI Joist Web Restoration Detail – IJ(CAN)-27 | Tech Note Canada | View | tech-note-canada | canada-east | |
| 1/2” Deep Notch Top BCI and AJS Joist Flange Near Bearing – IJ(CAN)-28 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Drain Pipe at the Joist Location – IJ(CAN)-29 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Minor Cuts or Crushing of BCI or AJS Joist Flanges – IJ(CAN)-1 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Higher Floor Performance – IJ(CAN)-2 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joists – Hole Close to End Bearing: Repair Detail – IJ(CAN)-3 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joists – Half Notched Top Flange Near Bearing Repair – IJ(CAN)-4 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Floor Panel Installation Provisions for Composite Action (Glued & Nailed) – IJ(CAN)-5 | Tech Note Canada | View | tech-note-canada | canada-east | |
| End Wall Blocking – IJ(CAN)-6 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Blocking at Interior Supports for Continuous or Cantilevered Joists – IJ(CAN)-7 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Split Joists at Interior Supports – IJ(CAN)-8 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Lapped Joist Bearing at Interior Supports – IJ(CAN)-9 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joists – Fire/Bevel-Cuts – IJ(CAN)-10 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Brick-Ledge Cantilevers – IJ(CAN)-11 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI and AJS Joist Small Notch in Top Flange Repair – IJ(CAN)-12 | Tech Note Canada | View | tech-note-canada | canada-east | |
| Multiple Ply BCI or AJS Members – IJ(CAN)-13 | Tech Note Canada | View | tech-note-canada | canada-east | |
| BCI / AJS Knockout and Field cut Web Hole Location Provisions – IJ-27 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Drop-In Gypsum Board for Floor Fire Protection Installation Guide – IJ-28 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| FMJ AJS 24 Joist for Fire Protection of Floors Installation Guide – IJ-30 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Rectangular Web Holes in BCI Joists – IJ-31 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Rounded Rectangular Web Holes in BCI Joists – IJ-33 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Flange Screw Provisions – IJ-34 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI & AJS Joist Slope-Cut Reinforcement – IJ-3 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| BCI / AJS joist Nailed Connection to Hip or Valley Beam – IJ-5 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| BCI / AJS Rafter Connection to 2x Ceiling Joists – IJ-6 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Temporary Storage of Gypsum Board on BCI / AJS Joists – IJ-7 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Floor Sheathing Installation Provisions for Composite Action Stiffness – IJ-8 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI Door & Window Header Load Table – IJ-9 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| BCI / AJS Rafter Cut Length Calculation – IJ-10 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Fire Exposure of Engineered Wood Products – IJ-11 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Design Live Loads for Residential Floors – IJ-12 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Multiple Ply BCI / AJS Members – IJ-13 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Minor Cuts / Crushing of BCI / AJS Flanges – IJ-14 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI / AJS Joist Web Stiffener Requirements – IJ-16 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Temporary Storage of Gypsum Board on BCI / AJS Joists with Shoring – IJ-19 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Web Holes Cut with SawTek Router – IJ-20 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| BCI & AJS Flange Nailing Splits at Bearing Supports – IJ-21 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Requirements for Additional BCI / AJS Joists to Support Parallel Partition Walls – IJ-22 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Web Armor Fire Protection for AJS / BCI Joists Installation Guide – IJ-23 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Mineral Wool Insulation for Floor Fire Protection Installation Guide – IJ-25 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| BCI / AJS Joists and Blocking Panels Shear Transfer Equivalency – IJ-1 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| BCI Joist Span to Depth Ratio in BC Calc – IJ-2 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| PreserveTech HW / Royal Pacific Industries Insect-Treated Engineered Wood Products for Hawaii – GE-26 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Electrical Wiring Installation Horizontal Holes – GE-27 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Installed Damaged Product – GE-28 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Weights of Building Materials – GE-1 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Brick Veneer Support on Wood – GE-2 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Allowable Fastener Spacing & Design for BCI Joists and Versa-Lam LVL – GE-3 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| BCI / AJS Joist, VERSA-LAM & BOISE GLULAM Exterior Exposure Policy – GE-4 | Tech Note U.S. | View | tech-note-u-s | us-east us-west canada-east canada-west | |
| Required Separation Between Garage and Living Space Above – GE-5 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Designing for Ceramic or Stone Tile Floor Finishes – GE-6 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Rafter Bracing and Kneewall Loads – GE-8 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Feet & Inches on a Regular Calculator – GE-9 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Temperature and Moisture Content of Engineered Wood Products During Manufacturing – GE-10 | Tech Note U.S. | View | tech-note-u-s | canada-east canada-west | |
| High Slope Roofs – GE-12 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Formaldehyde & Engineered Wood Products – GE-15 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Lateral Bracing of Joists and Beams – GE-16 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Use of Engineered Wood Products in International Shipping Pallets and Packaging – GE-17 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Wood Frame Garage Floor Design Guidelines – GE-19 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Design Load Considerations for Non-Load Bearing Partition Walls in Residential Construction – GE-22 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Vertical Load Transfer over Bearings within BC FRAMER & BC CALC – GE-23 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Use of Boise Cascade EWP for Concrete Formwork – GE-24 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Pressure and Topical Applications and Treatments – GE-25 | Tech Note U.S. | View | tech-note-u-s | us-east us-west | |
| Boise Cascade I-joists and Mineral Wool Batts – JOI-1904 | Multifamily/Light Commercial | View | mflc | ||
| Canadian Versa-Lam LVL, BCI and AJS Joist Installation Guide – French – MTP-CF7001 | *Popular, Installation Guide | View | aa-popular installation-guide | canada-east canada-west | |
| Qualified Wood I-Joists PR-E730 With Low Formaldehyde Emissions Code Report – APA PR-E730 | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| AJS Joist Installation Guide – MTP-E7601 | Installation Guide | View | installation-guide | us-east | |
| Fire-Rated Assemblies Code Report – APA PR-S201 | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| Multifamily & Light Commercial Promo flyer – MTP-7100 | Multifamily/Light Commercial | View | mflc | us-east us-west canada-east canada-west | |
| Canadian Fire and Design Installation Guide – French – MTP-7050 | Multifamily/Light Commercial, Safety & Fire | View | mflc safety-fire | canada-east | |
| AJS Joist Code Report – VAR-1017 | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| AJS Joist Code Report – ESR-1144 | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| AJS Joist Code Report – CCMC 12787E | Code Report | View | code-report | canada-east | |
| AJS Joist Code Report – French – CCMC 12787F | Code Report | View | code-report | canada-east | |
| Deep Depth AJS Joist Product Overview – JOI-E1603 | Multifamily/Light Commercial | View | mflc | us-east us-west canada-east canada-west | |
| Canadian AJS Joist Commercial Guide – MTP-CE7610 | Multifamily/Light Commercial | View | mflc | canada-east | |
| AJS Joist Specifier Guide – MTP-E7600 | *Popular, Product / Specifier Guide | View | aa-popular product-specifier-guide | us-east | |
| AJS Joist 24 Product Guide – JOI-E1601 | Product / Specifier Guide | View | product-specifier-guide | us-east us-west canada-east canada-west | |
| Canadian AJS 140/20/25 Joist Specifier Guide – French – JOI-CF1600 | Product / Specifier Guide | View | product-specifier-guide | canada-east |
Learn All You Need to Know About I-Joists
As an engineered wood product, I-joists offer better consistency and strength while weighing less. Did you know all the I-joist uses, and benefits, or how they’re made? We’ve got all the details right here.
Support You Can Count On
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Ready When (and Where) You Are
AJS Joists are sold throughout the Northeastern US and Eastern Canada.
Find a distribution center near you.