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.

Is it ok to drill holes in engineered floor joist.

In a perfect world floor joists are left whole to provide the greatest support. Or the amount specified by the manufacturer of web between the edge of the hole and the flange. Holes cannot be closer than 2 to. If you have manufactured floor joists you will want to consult the particular manufacturer s literature.

Holes anywhere in the web area of engineered i joists except within 6 in. Refer to the hole chart on page 9 of the tji specifiers guide for uniformly loaded joists. 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. For the engineered i joists shown in fig 1 some of the limitations are.

Sometimes joists are notched at the end where they bear on a wall or sill. Away from the top and bottom. But modern living requires electrical wiring and plumbing. Holes must be at least 2 in.

Do not notch or drill holes through the top or bottom flange. Where and how to drill joists for electrical cables or. For a 2 10 where actual depth is 9 25 inches the maximum allowable hole diameter would be just over three inches. They do not affect hole placement.

From the top and bottom edges of a joist. Area provided there are no other holes in the joist or notches along its top or bottom. Knockouts are located in web at approximately 12 on center. Tradespeople often need to cut notches or holes in floor and ceiling joists to run pipes ductwork or wires.

Maximum hole size is one third of the joist depth. For simple span 5 minimum uniformly loaded joists meeting the requirements of this guide one maximum size round hole. 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. That gives you a 5 1 4 in.

Of walls and rim joists. Leave 1 8 of web minimum at top and bottom of hole. Drill large holes toward the center of i beam joists not toward the ends. Holes may be located vertically anywhere within the web.

Drill holes with a diameter of no more than one third the depth of the joist staying 2 in. Typically most manufacturers have little perforated knockout holes that can be punched out without the use of a drill. The diameter of holes shall not be greater than 1 3 the depth of the floor joists. Area in the middle of the 2 10 joist where the hole can go.