Floor Joist Hole Chart

Floor Joist Hole Chart – Allowable holes minimum distance from table a no field cut holes in hatched zones minimum distance from table b 11⁄2 hole may be cut anywhere in outside of. No notches in the middle 1/3 of the joist, but holes are permitted here. At the center of the joist span provided that no other holes occur in the joist. Use this floor joist calculator to determine the number of floor joists you will need and how much they will cost.

For floor systems that require both simple span and continuous span joists, Holes need to be spaced certain distances from each other, but if you want to put a bunch of holes in one spot, you can count them all as one big hole. Read the corresponding joist series, depth and spacing. You can also use this calculator to determine the maximum allowable span a floor joist can be depending on its wood species, grade, size, and supported load.

Floor Joist Hole Chart

Please use the download button. Allowable holes for tji joists, timberstrand, microllam, and parallam. Find a span that meets or exceeds the required clear span.

The international residential code (irc) determines the size of your floor joists. They do not affect hole placement. Select the simple span or continuous span table, as required.

Joists with hole locations and/or sizes fall outside of the scope of this table must be analyzed based on the actual hole size, joist spacing, span and load conditions. Never notch or drill holes in the middle third of the joist. For deeper beams, the maximum hole diameter is 2.

No holes closer than 2 inches to any other hole or notch. However, if you are using engineered floor joists, you’ll need to follow a different set of guidelines. Irc covers the maximum span length of wood joists, from 2×6 to 2×12 or greater.

Bci Floor Joist Span Chart Floor Roma