2015 Irc Floor Joist Span Tables

A tutorial for using the span tables is also available.

2015 irc floor joist span tables.

The 2009 irc saw deck ledgers addressed the 2012 set up a section in the irc specific for decks and the 2015 brings joist and beam span tables as well as post sizing and foundation provisions. Span tables for joists and rafters 3 american wood council table 9 1 required compression perpendicular to grain design values f c in pounds per square inch for simple span joists and rafters with uniform load. Spans for ceiling joists shall be in accordance with tables r802 4 1 and r802 4 2. The still ambiguous lateral load provisions for decks have not been completely put to rest and the notorious anchor detail remains.

Table r802 5 1 4 rafter spans for common lumber species ground snow load 50 psf ceiling not attached to rafters l δ 180. Table r502 3 1 1 shall be used to determine the maximum allowable span of floor joists that support sleeping areas and attics that are accessed by means of a fixed stairway in accordance with section r311 7 provided that the design live load does not exceed 30 pounds per square foot 1 44 kpa and the design dead load does not exceed 20 pounds per square foot 0 96 kpa. International residential code 2015 irc 2015. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.