Ontario Building Code Floor Joist Span Table

Spans for joists rafters and beams 1 except as required in sentence 2 and article 9 23 13 10 the spans for wood joists and rafters shall conform to the spans shown in tables a 1 to a 7 for the uniform live loads shown in the tables.

Ontario building code floor joist span table.

Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span. When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. Live load floor joist span tables in chapter 7 of the state residential code based on the 2012 international residential code. The ontario building code spans for joists rafters and beams 9 23 4 2.

A double 2x12 beam can span 12 feet. Span charts and 2012 irc building codes for girders and headers. A 2 2x10 can span 10 feet and so on. Also available for the android os.

Span calculator for wood joists and rafters also available for the android os. 2 no bridging is assumed for spans for floor joists with concrete topping. The floor joist span chart and building code requirements are based on data from the 2012 international residential code using number 2 lumber. Types of floor joists.

Floor joist span tables for various sizes and species of wood. 1 spans apply only where the floors serve residential areas as described in table 4 1 5 3 or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in table 4 1 5 3. These charts are for 30 pound per square foot snow load on the roof. Table a 3 maximum spans for ceiling joists attic not accessible.

The numbers in gray indicate the distance between the support posts. Dimensional lumber deck beam span chart. Joists for use in residential framing applications fall into two different categories. Notes to table a 2.

2 spans for floor joists that are not selected from tables a 1 and a 2 and that. All other data is available on page 121 of the 2012 international residential code. This page focuses on the tree sawed variety. I asked my local building official how he checks a deck plan to make sure the joist size and spacing combination will meet requirements of the building code he goes to the 40 lb.

Tree sawed and engineered.