Ontario Building Code Floor Joist Span Table

Table a 3 maximum spans for ceiling joists attic not accessible.

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. These charts are for 30 pound per square foot snow load on the roof. This page focuses on the tree sawed variety. 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. 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. 2 spans for floor joists that are not selected from tables a 1 and a 2 and that. 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.

Types of floor joists. Dimensional lumber deck beam span chart. Includes span tables for all load bearing locations and the number of jack studs. All other data is available on page 121 of the 2012 international residential code.

The floor joist span chart and building code requirements are based on data from the 2012 international residential code using number 2 lumber. 2 no bridging is assumed for spans for floor joists with concrete topping. Notes to table a 2. Span charts and 2012 irc building codes for girders and headers.

Joists for use in residential framing applications fall into two different categories. 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. Floor joist span tables for various sizes and species of wood. Also available for the android os.

G dsdsystem handouts building residential beamandjoistspantables docx page 1 of 2 building inspections beam and joist span tables built up wood floor beams supporting one floor in a house maximum spans for uniformly distributed loads species and grade supported built up beam size joist length 3 2x8 4 2x8 3 2x10 4 2x10 3 2x12 4 2x12. A 2 2x10 can span 10 feet and so on. Tree sawed and engineered. A double 2x12 beam can span 12 feet.

The numbers in gray indicate the distance between the support posts.