True floor joist span calculations can only be made by a structural engineer or contractor.
Floor joist span table ontario.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Live load floor joist span tables in chapter 7 of the state residential code based on the 2012 international residential code.
2 grade of douglas fir are indicated below.
This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction.
Maximum floor joist span for no.
Furniture fabulous floor joist span table for your house.
Total load deflection is limited to l 240.
Maximum spans are measured centerline to centerline of bearing and are based on uniformly loaded joists.
Floor joist span calculator.
Understanding floor joist spans deck r design microllam lvl beams weyerhaeuser floor beam span tables calculator the span canadian wood council.
Minimum end bearing length is 1 spans in bold require web stiffeners at osb end panel.
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.
Apa performance rated i joists pris are manufactured in accordance with pri 400 performance standard for apa ews i joists form x720 this performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span.
To use the joist span calculator below first select the species of lumber you will use for your construction project from the drop down list.
Live load is weight of furniture wind snow and more.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Designing with wood beam span tables.
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.
The ontario building code spans for joists rafters and beams 9 23 4 2.
Dead load weight of structure and fixed loads 10 lbs ft 2.
The indicated spans are based on simple span joists.
Floor joist span tables for various sizes and species of wood.
Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.
2 spans for floor joists that are not selected from tables a 1 and a 2 and that.
1 psf lb f ft 2 47 88 n m 2.
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.
