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AJS Joists

Boise Cascade AJS Joists

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

  • Solid lumber flanges for quick installation
  • Lightweight for easier handling
  • Consistency helps keeps floors flat
  • Holes allowed in web
  • Forest-friendly sustainability

Available Depths:

  • 9 ½″
  • 11 ⅞″
  • 14″
  • 16″

Deeper Depths – AJS 25 and AJS 30

  • 18″
  • 20″
  • 22″
  • 24″

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

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
CODE REPORTS
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ICC-ES Report ESR-1144 AJS Fabricated Wood I-Joists View
ICC-ES VAR Environmental Report VAR-1017 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
Safety Data Sheets
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SDS Engineered Wood Products View
SDS Wood Dust View

Product Literature

PRODUCT/SPECIFIER/TECHNICAL GUIDES
>
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
CODE REPORTS
>
CCMC Evaluation Report 12787 ENGLISH View
ICC-ES VAR Environmental Report VAR-1017 View
CCMC Evaluation Report 12787 FRENCH View
TECH NOTES - GENERAL ENGINEERING
>
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

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.

I-Joist 101

Support You Can Count On

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.

Where to Buy