Is It Ok To Drill Holes In Engineered Floor Joist

Holes may be located vertically anywhere within the web.

Is it ok to drill holes in engineered floor joist.

Often hole size can be increased and holes can be placed closer to bearing than shown on the chart based on actual design spans and loads. In a perfect world floor joists are left whole to provide the greatest support. For simple span 5 minimum uniformly loaded joists meeting the requirements of this guide one maximum size round hole. How to drill a hole through the side of a floor joist.

Holes anywhere in the web area of engineered i joists except within 6 in. Drill holes with a diameter of no more than one third the depth of the joist staying 2 in. Where and how to drill joists for electrical cables or. They do not affect hole placement.

The diameter of holes shall not be greater than 1 3 the depth of the floor joists. For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches. Knockouts are located in web at approximately 12 on center. It is generally permissible to drill up to 38mm holes anywhere in the web.

Leave 1 8 of web minimum at top and bottom of hole. That gives you a 5 1 4 in. From the top and bottom edges of a joist. If the cut outs are too large or in the wrong location the joist can be weakened and unable to support the load it was designed for.

Or the amount specified by the manufacturer of web between the edge of the hole and the flange. Refer to the hole chart on page 9 of the tji specifiers guide for uniformly loaded joists. For the engineered i joists shown in fig 1 some of the limitations are. Area provided there are no other holes in the joist or notches along its top or bottom.

Sometimes joists are notched at the end where they bear on a wall or sill. Although notches aren t allowed in the center third of a joist s length you can drill holes anywhere along the length of the floor joist in that 5 1 4 in. If you have manufactured floor joists you will want to consult the particular manufacturer s literature. Of walls and rim joists.

Maximum hole size is one third of the joist depth. Drill large holes toward the center of i beam joists not toward the ends. But modern living requires electrical wiring and plumbing. Do not notch or drill holes through the top or bottom flange.

Holes must be at least 2 in. Typically most manufacturers have little perforated knockout holes that can be punched out without the use of a drill. Tradespeople often need to cut notches or holes in floor and ceiling joists to run pipes ductwork or wires. Holes cannot be closer than 2 to.