Sep 28, 2021 · Compared to the rules for boring holes in dimensional lumber, you can put surprisingly large holes in the middle web of I-joists. In fact, you can put holes that go almost all the way from the bottom to the top of the joist.

Here we discuss guidelines, codes, rules for notching or boring or sawing holes in wood joists. Best construction practices plan pipe, wiring and duct runs to avoid notching or boring holes in wood framing, particularly in joists and rafters.

For simple span (5' minimum), uniformly loaded joists used in residential applications, one maximum size round hole may be located at the center of the joist span provided that no other holes occur in the joist .

I-joist performance and environmental benefits have increased their use in construction. Builders choose wood I-joists because they offer uniform dimension, light weight, and long span capability. Holes may be cut in the web, allowing ducts and utilities to be run through the joist. These holes must strictly follow manufacturersÕ

Dec 14, 2011 · Cuts, notches and holes bored in trusses, laminated veneer lumber, gluelaminated members or I-joists are not permitted unless the effects of such penetrations are specifically considered in the design of the member.

Nov 20, 2018 · Typical manufacturer’s details for drilling I-Joists are shown in Fig 1. For the engineered I-Joists shown in Fig 1 some of the limitations are: Do not notch or drill holes through the top or bottom flange. It is generally permissible to drill up …

In addition to floor and roof framing details, this guide includes recommendations for cantilevers and placement of web holes. Good installation begins with specification of the correct joist for the application.

Nov 4, 2014 · Here’s a look at seven common mistakes with I-joist installation—and how to prevent them. 1. Lack of Communication. Many of the mistakes listed here come back to one simple problem: ambiguity between the dealer, architect, builder and framing contractor.

While it’s ok to make big holes in I-joists, you need to stay away from bearing points. These exact rules vary quite a bit from manufacturer to manufacturer, but in general, manufacturers are fussy about holes too close to areas with support beams below. Only small holes in cantilevers.

Jul 13, 2023 · Cutting holes in an I-joist is fairly easy to do. However, when it comes to hole size and placement, there are rules that must be followed to ensure they do not affect joist capacity. Here’s more information on cutting round holes as well as some Do’s and Don’ts regarding holes in BCI® and AJS® Joist webs.