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 | resource-category_hfilter | region_hfilter | |
|---|---|---|---|---|---|
| VAR-1017 AJS I-joist Code Report | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| ESR-1144 ALLJoist® Code Report | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| CCMC 12787E ALLJoist® English Code Report | Code Report | View | code-report | canada-east | |
| CCMC 12787F ALLJoist® French Code Report | Code Report | View | code-report | canada-east | |
| AJS I-joist Commerical Guide – MTP-E7610 | Multi-Fam/Light Comm | View | mflc | us-east canada-east | |
| Deep Depth Boise Cascade AJS Joists (MFLC) – JOI-E1603 | Multi-Fam/Light Comm | View | mflc | us-east us-west canada-east canada-west | |
| Canadian AJS I-joist Multi-Family / Commercial Spec Guide – MTP-CE7610 | Multi-Fam/Light Comm | View | mflc | canada-east | |
| AJS I-joist Specifier’s Guide – MTP-E7600 | *Popular, Product / Specifier Guide | View | aa-popular product-specifier-guide | us-east | |
| AJS I-joist 24 Product Guide | Product / Specifier Guide | View | product-specifier-guide | us-east us-west canada-east canada-west | |
| Guide du concepteur AJS – Est du Canada – JOI-CF1600 | Product / Specifier Guide | View | product-specifier-guide | canada-east | |
| APA PR-S201 Fire-Rated Assemblies Code Report | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| Multi-Family & Light Commercial Promo flyer – MTP-7100 | Multi-Fam/Light Comm | View | mflc | us-east us-west canada-east canada-west | |
| Guide de conception & d’installation pour la resistance au feu – Canada – MTP-CF7050 | Multi-Fam/Light Comm, Safety & Fire | View | mflc safety-fire | canada-east | |
| AJS I-joist Installation Guide – MTP-E7601 | Installation Guide | View | installation-guide | us-east | |
| APA PR-E730 Qualified Wood I-Joists PR-E730 With Low Formaldehyde Emissions | Code Report | View | code-report | us-east us-west canada-east canada-west | |
| Guide d’installation Versa-Lam, BCI & AJS – Canada – MTP-CF7001 | *Popular, Installation Guide | View | aa-popular installation-guide | canada-east canada-west | |
| Boise Cascade I-joists and Mineral Wool Batts – JOI-1904 | Multi-Fam/Light Comm | View | mflc | ||
| AJS Commercial Guide | Multi-Fam/Light Comm | View | mflc | us-east canada-east | |
| AJS 150/190 Product Guide | Product / Specifier Guide | View | product-specifier-guide | us-east | |
| Canadian AJS 140, 20 & 25 Specifier Guide | Product / Specifier Guide | View | product-specifier-guide | canada-east | |
| Guide du concepteur multifamilial et commercial – Est du Canada – MTP-CF7610 | Multi-Fam/Light Comm | View | mflc | canada-east | |
| Canadian AJS 140, 20 & 25 Specifier Guide (French) | Product / Specifier Guide | View | product-specifier-guide | canada-east | |
| Allowable Fastener Spacing & Design for BCI Joists and VERSA-LAM – GE-3 | Tech Note | View | tech-note | us-east us-west | |
| BCI & AJS Flange Nailing Splits at Bearing Supports – IJ-21 | Tech Note | View | tech-note | us-east us-west | |
| BCI & AJS Joist Slope-Cut Reinforcement – IJ-3 | Tech Note | View | tech-note | us-east us-west | |
| BCI / AJS joist Nailed Connection to Hip or Valley Beam – IJ-5 | Tech Note | View | tech-note | us-east us-west | |
| BCI / AJS Joist Web Stiffener Requirements – IJ-16 | Tech Note | View | tech-note | us-east us-west | |
| BCI / AJS Joist, VERSA-LAM & BOISE GLULAM Exterior Exposure Policy – GE-4 | Tech Note | View | tech-note | us-east us-west | |
| BCI / AJS Joists and Blocking Panels Shear Transfer Equivalency – IJ-1 | Tech Note | View | tech-note | us-east us-west | |
| BCI / AJS Knockout and Field cut Web Hole Location Provisions – IJ-27 | Tech Note | View | tech-note | us-east us-west | |
| BCI / AJS Rafter Connection to 2x Ceiling Joists – IJ-6 | Tech Note | View | tech-note | us-east us-west | |
| BCI / AJS Rafter Cut Length Calculation – IJ-10 | Tech Note | View | tech-note | us-east us-west | |
| BCI Door & Window Header Load Table – IJ-9 | Tech Note | View | tech-note | us-east us-west | |
| BCI Joist Span to Depth Ratio in BC Calc – IJ-2 | Tech Note | View | tech-note | us-east us-west | |
| Brick Veneer Support on Wood – GE-2 | Tech Note | View | tech-note | us-east us-west | |
| Designing for Ceramic or Stone Tile Floor Finishes – GE-6 | Tech Note | View | tech-note | us-east us-west | |
| Design Live Loads for Residential Floors – IJ-12 | Tech Note | View | tech-note | us-east us-west | |
| Design Load Considerations for Non-Load Bearing Partition Walls in Residental Construction – GE-22 | Tech Note | View | tech-note | us-east us-west | |
| Drop-In Gypsum Board for Floor Fire Protection Installation Guide – IJ-28 | Tech Note | View | tech-note | us-east us-west | |
| Electrical Wiring Installation Horizontal Holes – GE-27 | Tech Note | View | tech-note | us-east us-west | |
| Feet & Inches on a Regular Calculator – GE-9 | Tech Note | View | tech-note | us-east us-west | |
| Fire Exposure of Engineered Wood Products – IJ-11 | Tech Note | View | tech-note | us-east us-west | |
| FireBreak Ceramic Fiber Blanket Protection for AJS / BCI Joists: Installation Guide – IJ-26 | Tech Note | View | tech-note | us-east us-west | |
| FireBreak HITS Fire Protection for AJS Joists: Installation Guide – IJ-29 | Tech Note | View | tech-note | us-east us-west | |
| Flame Spread Classifications and Corresponding Surface Treatments – GE-13 | Tech Note | View | tech-note | us-east us-west | |
| Flange Screw Provisions – IJ-34 | Tech Note | View | tech-note | us-east us-west | |
| FMJ AJS 24 Joist for Fire Protection of Floors Installation Guide – IJ-30 | Tech Note | View | tech-note | us-east us-west | |
| Floor Sheathing Installation Provisions for Composite Action Stiffness – IJ-8 | Tech Note | View | tech-note | us-east us-west | |
| High Slope Roofs – GE-12 | Tech Note | View | tech-note | us-east us-west | |
| Formaldehyde & Engineered Wood Products – GE-15 | Tech Note | View | tech-note | us-east us-west | |
| Installed Damaged Product – GE-28 | Tech Note | View | tech-note | us-east us-west | |
| Lateral Bracing of Joists and Beams – GE-16 | Tech Note | View | tech-note | us-east us-west | |
| Mineral Wool Insulation for Floor Fire Protection Installation Guide – IJ-25 | Tech Note | View | tech-note | us-east us-west | |
| Multiple Ply BCI / AJS Members – IJ-13 | Tech Note | View | tech-note | us-east us-west | |
| Minor Cuts / Crushing of BCI / AJS Flanges – IJ-14 | Tech Note | View | tech-note | us-east us-west | |
| PreserveTech HW / Royal Pacific Industries Insect-Treated Engineered Wood Products for Hawaii – GE-26 | Tech Note | View | tech-note | us-east us-west | |
| Rafter Bracing and Kneewall Loads – GE-8 | Tech Note | View | tech-note | us-east us-west | |
| Rectangular Web Holes in BCI Joists – IJ-31 | Tech Note | View | tech-note | us-east us-west | |
| Pressure and Topical Applications and Treatments – GE-25 | Tech Note | View | tech-note | us-east us-west | |
| Required Separation Between Garage and Living Space Above – GE-5 | Tech Note | View | tech-note | us-east us-west | |
| Requirements for Additional BCI / AJS Joists to Support Parallel Partition Walls – IJ-22 | Tech Note | View | tech-note | us-east us-west | |
| Rounded Rectangular Web Holes in BCI Joists – IJ-33 | Tech Note | View | tech-note | us-east us-west | |
| Temperature and Moisture Content of Engineered Wood Products During Manufacturing – GE-10 | Tech Note | View | tech-note | us-east us-west | |
| Temporary Storage of Gypsum Board on BCI / AJS Joists with Shoring – IJ-19 | Tech Note | View | tech-note | us-east us-west | |
| Temporary Storage of Gypsum Board on BCI / AJS Joists – IJ-7 | Tech Note | View | tech-note | us-east us-west | |
| Use of Boise Cascade EWP for Concrete Formwork – GE-24 | Tech Note | View | tech-note | us-east us-west | |
| Use of Engineered Wood Products in International Shipping Pallets and Packaging – GE-17 | Tech Note | View | tech-note | us-east us-west | |
| Vertical Load Transfer over Bearings within BC FRAMER & BC CALC – GE-23 | Tech Note | View | tech-note | us-east us-west | |
| Web Armor Fire Protection for AJS / BCI Joists Installation Guide – IJ-23 | Tech Note | View | tech-note | us-east us-west | |
| Web Holes Cut with SawTek Router – IJ-20 | Tech Note | View | tech-note | us-east us-west | |
| Weights of Building Materials – GE-1 | Tech Note | View | tech-note | us-east us-west | |
| Wood Frame Garage Floor Design Guidelines – GE-19 | Tech Note | View | tech-note | us-east us-west | |
| Flame Spread and Fire Endurance: Surface Coatings – GE(CAN)-2 | Tech Note | View | tech-note | canada-east | |
| Allowable Nail Spacing & Designfor AJS® / BCI® Joists and Versa-L am® LVL – GE(CAN)-3 | Tech Note | View | tech-note | canada-east | |
| Weights of Building Materials – GE(CAN)-1 | Tech Note | View | tech-note | canada-east | |
| BCI / AJS Joist, VERSA-LAM & BOISE GLULAM Exterior Exposure Policy – GE(CAN)-4 | Tech Note | View | tech-note | canada-east | |
| Joist Ceiling Framing Over an Indoor Pool – GE(CAN)-5 | Tech Note | View | tech-note | canada-east | |
| Formaldehyde & Engineered Wood Products – GE(CAN)-15 | Tech Note | View | tech-note | canada-east | |
| Lateral Bracing of Joists and Beams – GE(CAN)-16 | Tech Note | View | tech-note | canada-east | |
| Vertical Load Transfer over Bearings within BC FRAMER & BC CALC – GE(CAN)-23 | Tech Note | View | tech-note | canada-east | |
| Pressure and Topical Applications and Treatments – GE(CAN)-25 | Tech Note | View | tech-note | canada-east canada-west | |
| Interior Connection: Notched Post Glued and Bolted to Rim Joist – IJ(CAN)-16 | Tech Note | View | tech-note | canada-east | |
| Designing for Ceramic or Stone Tile Floor Finishes – IJ(CAN)-15 | Tech Note | View | tech-note | canada-east | |
| Horizontal Diaphragm Designed with BCI® joists – IJ(CAN)-18 | Tech Note | View | tech-note | canada-east | |
| New BCI® / AJS® Joist Installed for Damaged – IJ(CAN)-19 | Tech Note | View | tech-note | canada-east | |
| AJS®/ BCI® Joists Knockout and Field-Cut Web Hole Location Provisions – IJ(CAN)-20 | Tech Note | View | tech-note | canada-east | |
| Headout Detail for Damaged BCI® or AJS® joists – IJ(CAN)-17 | Tech Note | View | tech-note | canada-east | |
| Suspended Ceiling Details for AJS® or BCI® Joists – IJ(CAN)-21 | Tech Note | View | tech-note | canada-east | |
| Sprinkler Attachment Details – IJ(CAN)-22 | Tech Note | View | tech-note | canada-east | |
| AJS® / BCI® Joists to Steel Beam: – Hanger Connections – IJ(CAN)-23 | Tech Note | View | tech-note | canada-east | |
| Location and Shapes of AJS® / BCI® Web Holes – IJ(CAN)-24 | Tech Note | View | tech-note | canada-east | |
| Double AJS® Joist Without Filler Block Detail – IJ(CAN)-25 | Tech Note | View | tech-note | canada-east | |
| Versa-Lam® Installed for Damaged AJS® / BCI® Joist – IJ(CAN)-26 | Tech Note | View | tech-note | canada-east | |
| AJS® & BCI® Joist Web Restoration Detail – IJ(CAN)-27 | Tech Note | View | tech-note | canada-east | |
| BCI® & AJS® Joist – 1/2” Deep Notch Top Flange Near Bearing – IJ(CAN)-28 | Tech Note | View | tech-note | canada-east | |
| Minor Cuts / Crushing of Boise I-Joist Flanges – IJ(CAN)-1 | Tech Note | View | tech-note | canada-east | |
| Drain Pipe at the Joist Location – IJ(CAN)-29 | Tech Note | View | tech-note | canada-east | |
| BCI® & AJS® Joist – Hole Close to End Bearing: Repair Detail – IJ(CAN)-3 | Tech Note | View | tech-note | canada-east | |
| BCI® & AJS® Joist – Half Notched Top Flange Near Bearing Repair – IJ(CAN)-4 | Tech Note | View | tech-note | canada-east | |
| Higher Floor Performance – IJ(CAN)-2 | Tech Note | View | tech-note | canada-east | |
| Floor Panel Installation Provisionsfor Composite Action (Glued & Nailed) – IJ(CAN)-5 | Tech Note | View | tech-note | canada-east | |
| End Wall Blocking – IJ(CAN)-6 | Tech Note | View | tech-note | canada-east | |
| Blocking at Interior Supports for Continuous or Cantilevered Joists – IJ(CAN)-7 | Tech Note | View | tech-note | canada-east | |
| Split Joists at Interior Supports – IJ(CAN)-8 | Tech Note | View | tech-note | canada-east | |
| Lapped Joist Bearing at Interior Supports – IJ(CAN)-9 | Tech Note | View | tech-note | canada-east | |
| BCI® & AJS® Joists: Fire/Bevel-Cuts – IJ(CAN)-10 | Tech Note | View | tech-note | canada-east | |
| BCI® & AJS® Joist Small Notch in Top Flange Repair – IJ(CAN)-12 | Tech Note | View | tech-note | canada-east | |
| Multiple Ply BCI / AJS Members – IJ(CAN)-13 | Tech Note | View | tech-note | canada-east | |
| BRICK-LEDGE CANTILEVERS – IJ(CAN)-11 | Tech Note | View | tech-note | canada-east | |
| Fire and Design Installation Guide MTP-7050 – CAN – English | Installation Guide, Safety & Fire | View | installation-guide safety-fire | canada-east canada-west | |
| Canada English Install Guide: AJS & BCI Joist, Versa-Lam-MTP-C7001 | Installation Guide | View | installation-guide | canada-east canada-west | |
| Tech Note IJ-24 – Analyzing Multiple Web Holes as a Single Encompassing Hole | Tech Note | View | tech-note |
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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BC Software
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Engineering Support
Faster. Stronger. Easier.
Ready When (and Where) You Are
AJS Joists are sold throughout the Northeastern US and Eastern Canada.
Find a distribution center near you.