An easy-to-install solution for high-performance floors and roofs available throughout the Northeastern US and Eastern Canada.
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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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/SPECIFIER/TECHNICAL GUIDES | > |
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US ALLJOIST® and VERSA-LAM® Specifier Guide | View |
US ALLJOIST® and VERSA-LAM® Install Guide (ltr size) | View |
US ALLJOIST® Commercial Guide | View |
US AJS® 150-190 Product Guide | View |
US AJS® 24 Product Guide | View |
US AJS® 25 Deep Depths Product Guide | View |
Fire Design and Install Guide | View |
Tech Notes - General Engineering | > |
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Weights of Building Materals – GE-1 | View |
Brick Veneer Support on Wood – GE-2 | View |
Allowable Fastener Spacing & Design for BCI Joists and VERSA-LAM – GE-3 | View |
BCI / AJS Joist, VERSA-LAM & BOISE GLULAM Exterior Exposure Policy – GE-4 | View |
Required Separation Between Garage and Living Space Above – GE-5 | View |
Designing for Ceramic or Stone Tile Floor Finishes – GE-6 | View |
Rafter Bracing and Kneewall Loads – GE-8 | View |
Feet & Inches on a Regular Calculator – GE-9 | View |
Temperature and Moisture Content of Engineered Wood Products During Manufacturing – GE-10 | View |
High Slope Roofs – GE-12 | View |
Flame Spread Classifications and Corresponding Surface Treatments – GE-13 | View |
Formaldehyde & Engineered Wood Products – GE-15 | View |
Lateral Bracing of Joists and Beams – GE-16 | View |
Use of Engineered Wood Products in International Shipping Pallets and Packaging – GE-17 | View |
Wood Frame Garage Floor Design Guildlines – GE-19 | View |
Insect-Treated Engineered Wood Products Approved for Hawaii – GE-21 | View |
Design Load Considerations for Non-Load Bearing Partition Walls in Residental Construction – GE-22 | View |
Vertical Load Transfer over Bearings within BC FRAMER & BC CALC – GE-23 | View |
Use of Boise Cascade EWP for Concrete Formwork – GE-24 | View |
Pressure and Topical Applications and Treatments – GE-25 | View |
PreserveTech HW / Royal Pacific Industries Insect-Treated Engineered Wood Products for Hawaii – GE-26 | View |
Electrical Wiring Installation Horizontal Holes – GE-27 | View |
Installed Damaged Product – GE-28 | View |
TECH NOTES - AJS JOISTS | > |
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AJS® Joists and Blocking Panels Shear Transfer Equivalency – IJ-1 | View |
BCI® Joist Span to Depth Ratio in BC Calc – IJ-2 | View |
AJS® Joist Slope-Cut Reinforcement – IJ-3 | View |
AJS® Joist Nailed Connection to Hip or Valley Beam – IJ-5 | View |
AJS® Rafter Connection to 2x Ceiling Joists – IJ-6 | View |
Temporary Storage of Gypsum Board on AJS® Joists – IJ-7 | View |
Floor Sheathing Installation Provisions for Composite Action Stiffness – IJ-8 | View |
BCI® Door & Window Header Load Table – IJ-9 | View |
AJS® Rafter Cut Length Calculation – IJ-10 | View |
Fire Exposure of Engineered Wood Products – IJ-11 | View |
Design Live Loads for Residential Floors – IJ-12 | View |
Multiple Ply AJS® Members – IJ-13 | View |
Minor Cuts / Crushing of AJS® Flanges – IJ-14 | View |
AJS® Joist Web Stiffener Requirements – IJ-16 | View |
Temporary Storage of Gypsum Board on AJS® Joists with Shoring – IJ-19 | View |
Web Holes Cut with SawTek® Router – IJ-20 | View |
AJS® Flange Nailing Splits at Bearing Supports – IJ-21 | View |
Requirements for Additional AJS® Joists to Support Parallel Partition Walls – IJ-22 | View |
Web Armor Fire Protection for AJS® Joists Installation Guide – IJ-23 | View |
Analyzing Multiple Web Holes as a Single Encompassing Hole – IJ-24 | View |
Mineral Wool Insulation for Floor Fire Protection Installation Guide – IJ-25 | View |
FireBreak Ceramic Fiber Blanket Protection for AJS® Joists: Installation Guide – IJ-26 | View |
AJS® Knockout and Field-Cut Web Hole Location Provisions – IJ-27 | View |
Drop-In Gypsum Board for Floor Fire Protection Installation Guide – IJ-28 | View |
FireBreak HITS™ Fire Protection for AJS® Joists: Installation Guide – IJ-29 | View |
AJS® 24 FMJ Joist for Fire Protection of Floors Installation Guide – IJ-30 | View |
Rectangular Web Holes in BCI® Joists – IJ-31 | View |
Rounded Rectangular Web Holes in BCI® Joists – IJ-33 | View |
Flange Screw Provisions – IJ-34 | View |
PRODUCT/SPECIFIER/TECHNICAL GUIDES | > |
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CANADA ENGLISH ALLJOIST®, BCI® and VERSA-LAM® Install Guide (ltr size) | View |
CANADA ENGLISH ALLJOIST® Specifier Guide | View |
CANADA ENGLISH ALLJOIST® Commercial Guide | View |
CANADA ENGLISH Fire Design and Install Guide | View |
CANADA FRENCH ALLJOIST® Specifier Guide | View |
CANADA FRENCH ALLJOIST®, BCI® and VERSA-LAM® Install Guide (ltr size) | View |
CANADA FRENCH Fire Design and Install Guide | View |
TECH NOTES - GENERAL ENGINEERING | > |
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Weights of Building Materals – GE(CAN)-1 | View |
Flame Spread and Fire Endurance: Surface Coatings – GE(CAN)-2 | View |
Allowable Nail Spacing & Designfor AJS® / BCI® Joists and Versa-L am® LVL – GE(CAN)-3 | View |
BCI / AJS Joist, VERSA-LAM & BOISE GLULAM Exterior Exposure Policy – GE(CAN)-4 | View |
Joist Ceiling Framing Over an Indoor Pool – GE(CAN)-5 | View |
Formaldehyde & Engineered Wood Products – GE(CAN)-15 | View |
Lateral Bracing of Joists and Beams – GE(CAN)-16 | View |
Vertical Load Transfer over Bearings within BC FRAMER & BC CALC – GE(CAN)-23 | View |
Pressure and Topical Applications and Treatments – GE(CAN)-25 | View |
TECH NOTES - AJS JOISTS | > |
---|---|
AJS® Joists and Blocking Panels Shear Transfer Equivalency | View |
BCI® Joist Span to Depth Ratio in BC Calc | View |
AJS® Joist Slope-Cut Reinforcement | View |
AJS® joist Nailed Connection to Hip or Valley Beam | View |
AJS® Rafter Connection to 2x Ceiling Joists | View |
Temporary Storage of Gypsum Board on AJS® Joists | View |
Floor Sheathing Installation Provisions for Composite Action Stiffness | View |
BCI® Door & Window Header Load Table | View |
AJS® Rafter Cut Length Calculation | View |
Fire Exposure of Engineered Wood Products | View |
Design Live Loads for Residential Floors | View |
Multiple Ply AJS® Members | View |
Minor Cuts / Crushing of AJS® Flanges | View |
AJS® Joist Web Stiffener Requirements | View |
Temporary Storage of Gypsum Board on AJS® Joists with Shoring | View |
Web Holes Cut with SawTek® Router | View |
AJS® Flange Nailing Splits at Bearing Supports | View |
Requirements for Additional AJS® Joists to Support Parallel Partition Walls | View |
Web Armor Fire Protection for AJS® Joists Installation Guide | View |
Analyzing Multiple Web Holes as a Single Encompassing Hole | View |
Mineral Wool Insulation for Floor Fire Protection Installation Guide | View |
FireBreak Ceramic Fiber Blanket Protection for AJS®Joists: Installation Guide | View |
AJS® Knockout and Field-Cut Web Hole Location Provisions | View |
Drop-In Gypsum Board for Floor Fire Protection Installation Guide | View |
FireBreak HITS™ Fire Protection for AJS® Joists: Installation Guide | View |
AJS® 24 FMJ Joist for Fire Protection of Floors Installation Guide | View |
Rectangular Web Holes in BCI® Joists | View |
Rounded Rectangular Web Holes in BCI® Joists | View |
Flange Screw Provisions | View |
Minor Cuts / Crushing of Boise I-Joist Flanges – IJ(CAN)-1 | View |
Higher Floor Performance – IJ(CAN)-2 | View |
BCI® & AJS® Joist – Hole Close to End Bearing: Repair Detail – IJ(CAN)-3 | View |
BCI® & AJS® Joist – Half Notched Top Flange Near Bearing Repair – IJ(CAN)-4 | View |
Floor Panel Installation Provisionsfor Composite Action (Glued & Nailed) – IJ(CAN)-5 | View |
End Wall Blocking – IJ(CAN)-6 | View |
Blocking at Interior Supports for Continuous or Cantilevered Joists – IJ(CAN)-7 | View |
Split Joists at Interior Supports – IJ(CAN)-8 | View |
Lapped Joist Bearing at Interior Supports – IJ(CAN)-9 | View |
BCI® & AJS® Joists: Fire/Bevel-Cuts – IJ(CAN)-10 | View |
BRICK-LEDGE CANTILEVERS – IJ(CAN)-11 | View |
BCI® & AJS® Joist Small Notch in Top Flange Repair – IJ(CAN)-12 | View |
Multiple Ply BCI / AJS Members – IJ(CAN)-13 | View |
AJS/BCI® Joist – Horizontal/Vertical Split in The Bottom/Top Flange: Repair Details – IJ(CAN)-14 | View |
Designing for Ceramic or Stone Tile Floor Finishes – IJ(CAN)-15 | View |
Interior Connection: Notched Post Glued and Bolted to Rim Joist – IJ(CAN)-16 | View |
Headout Detail for Damaged BCI® or AJS® joists – IJ(CAN)-17 | View |
Horizontal Diaphragm Designed with BCI® joists – IJ(CAN)-18 | View |
New BCI® / AJS® Joist Installed for Damaged – IJ(CAN)-19 | View |
AJS®/ BCI® Joists Knockout and Field-Cut Web Hole Location Provisions – IJ(CAN)-20 | View |
Suspended Ceiling Details for AJS® or BCI® Joists – IJ(CAN)-21 | View |
Sprinkler Attachment Details – IJ(CAN)-22 | View |
AJS® / BCI® Joists to Steel Beam: - Hanger Connections – IJ(CAN)-23 | View |
Location and Shapes of AJS® / BCI® Web Holes – IJ(CAN)-24 | View |
Double AJS® Joist Without Filler Block Detail – IJ(CAN)-25 | View |
Versa-Lam® Installed for Damaged AJS® / BCI® Joist – IJ(CAN)-26 | View |
AJS® & BCI® Joist Web Restoration Detail – IJ(CAN)-27 | View |
BCI® & AJS® Joist – 1/2” Deep Notch Top Flange Near Bearing – IJ(CAN)-28 | View |
Drain Pipe at the Joist Location – IJ(CAN)-29 | View |
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.
AJS Joists are sold throughout the Northeastern US and Eastern Canada.
Find a distribution center near you.