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

Browse our specifier guides, tech notes, and more.

Product Literature

PRODUCT/SPECIFIER/TECHNICAL GUIDES
>
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
CODE REPORTS
>
ICC-ES Report ESR-1144 AJS Fabricated Wood I-Joists View
ICC-ES VAR Environmental Report VAR-1017 View
TECH NOTES
>
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
FIRE DESIGN AND INSTALL GUIDE
>
Fire Design and Install Guide 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
>
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

Support You Can Count On

Ready When (and Where) You Are

AJS Joists are sold throughout the Northeastern US and Eastern Canada.

Find a distribution center near you.