When you choose Trus Joist, you're choosing the brand that:

-Invented the very first I-Joist over 50 years ago

-Lead innovation and design to create a suite of Engineered Wood Products, including I-Joist, LVL Microllam, LSL Timberstrand, and PSL Parallam

-Pushed the limits of span charts to make the open floor concepts of today a reality 

-Has been the #1 used I-Joist for the past 14 years 

-And is one of the most trusted brands in the building community today.

Trus Joist.  The Only Choice. 


Indy TJI Floor System Takeoff


    Available Sizes 

    Span Chart

    L/480 is the design criteria we recommend for the best performing floor

    Features and Benefits:

    -LVL Flange for superior strength and a squeak-free floor

    -Capable of spans up to 32'

    -Pre-notched holes for mechanicals 

    -Multiple depths and series for any application

    -In-house design and engineering 

    -Long Spans

            I-Joists can span up to a whopping 32' without support, giving custom home builders the ability to create open floor plans that customers demand

    -LVL Flange

            An LVL flange is critical for a high performing floor because it prevents squeaky floors in two ways.  1) the LVL flange holds fasteners better, preventing loose nails that cause squeaks, and 2) it will not shrink over time with the moisture change which is another common cause of squeaks 

    -Engineered for Consistency 

            All TJI Joists will be perfectly straight and will not twist, warp, or cup

    -Allow for spacing for HVAC, Electrical, and Plumbing

            Large holes can be cut in the webbing of TJI Joists, allowing for mechanicals to be easily run and installed.  Joists can also be spaced wider than traditional solid sawn joists which allows for quicker and easier installation

    -Fast and Easy Install

            All TJI Joists are designed using patented software that designs a floor taylor-made for every home.  This software creates a layout and specifies where every single framing member goes.  When the material arrives on the jobsite, there is minimal cutting, and carpenters know exactly where every joist goes. 


    Trus Joist I-Joist Product Page

    Trus Joist I-Joist Installation Guide

    Allowable Holes I-Joists & Beams

    Trus Joist I-Joist Spec Sheet

    Trus Joist I-Joist Warranty



     Floor Plan Takeoff Process

    Sample Floor Plan Layout

    Minimum Criteria Span (per code)



    Fiber Source


    Installation Videos