Residential Floor Joist Span Table

Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21.

Residential floor joist span table.

Of bearings and is based on uniformly loaded joists. Using floor joist span tables. For i joists we combine laminated veneer lumber lvl lp solidstart i joists have been evaluated by ccmc for. View joist rafter tables.

The spans are based on simple span joists. Continuing on from part 1. Floor joist span tables for various sizes and species of wood. Lp solidstart i joists technical guide for residential construction lpi.

Residential structural design vertical structural forces we were about to start learning about floor joist span tables. Joists design properties 6 floor span and load tables 7 8 tips for preventing floor noise 8 allowable holes 9 cantilevers 10 11 roof span and load tables 12 13 framing connectors 14 15 section 2. The maximum span is measured o c. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.

While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length. 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. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Don t worry you won t need to do a lot of calculations in determining the size and placement of the structural framing within your house design.

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. 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. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. True floor joist span calculations can only be made by a structural engineer or contractor.

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. Joist span and spacing is set by your local building code. When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started.