Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.
Floor system span chart.
So the house dimensions will now be 24 x 13.
Our joist span charts are for wood joists with a maximum dead load of 10 pounds per square foot and a live load of 40 pounds per square foot.
Live load represents the weight of furniture snow etc.
Top and bottom chords braced by structural sheathing 6.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
If you have any questions.
Tcdl 10 psf and bcdl 5 psf 3.
Live load is weight of furniture wind snow and more.
The widest span in the floor joist span table in part 2 of this tutorial module showed that floor joists can span 17 2 if they are 2 x 12s spaced 12 o c.
Looking at this table you will see there is a choice in the size of floor joist 2 x 6 2 x 8 2 x 10 or 2 x 12 and there is a choice in the joist spacing 12 16 or 14.
The table excerpt above is simply a sample and may not be valid for your region.
Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall.
Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability.
Tcll top chord floor live load 2.
Dead load weight of structure and fixed loads 10 lbs ft 2.
The floor joist spacing is the distance between the centers.
Let s expand our house beyond that 17 2 span capability to 24 feet wide.
Maximum deflection is limited by l 360 or l 480 under live load.
Engineered wood products ewp span and size charts for bci joists.
1 ft 0 3048 m.
Openings are to be located in the center of the span max opening width is 24 inches 7.
Live load l 480 total load l 360 5.
Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.
Spacing of trusses are center to center in inches.
Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.
1 psf lb f ft 2 47 88 n m 2.
Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21 framing connectors 22 23.
Sample floor joist span table.
Spans shown are in feet 4.
This chart is for basic reference only.
Maximum floor joist span for no.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
