3 Ply 2x8 Beam Span Floors

A double 2x12 beam can span 12 feet.

3 ply 2x8 beam span floors.

In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches. Although single plies are permitted they are not recommended. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. 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 8 9 8 11 2 11 10 13 8 13 8 15 10 10 8 8 10 0 10 7 12 2 12 3 14 2.

Dimensional lumber deck beam span chart. Span calculator for wood joists and rafters also available for the android os. Then a 2x4 on top now that the beam is 3 5 inches wide lying down and another 2x4 on the bottom. The values displayed in the resulting table will show nine possible maximum beam spans for the supported length selected.

Deck builders can now refer to section r507 6 deck beams and table r507 6 deck beam span lengths to determine the size of 2 ply and 3 ply built up beams made from 2 6 through 2 12 lumber. A 2 2x10 can span 10 feet and so on. Nail each ply of a beam with a minimum of 10d nails. Roof ceiling 2 clear span floors 3 0 3 3 8 3 4.

Next consult a span table to cross reference the spacing and span to find the required fb value for that table s load limits. The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000. Beam span calculator for help simply click on the beside the section you need help with watch this tutorial video. Lumber species southern pine douglas fir douglas fir larch hemlock fir spruce pine fir redwood western cedar ponderosa pine red pine.

The numbers in gray indicate the distance between the support posts. I now have a box beam which is 3 5 inch wide and 10 25 inches high. Also available for the android os. These nine beam spans are for built up beams made up of either 2x8 2x10 or 2x12 dimensional lumber nailed together as either 3 4 or 5 ply beams.

Use two nails on each end and at splices. 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. Connecting the posts are beams made of a 2x8 a 1 2 inch by 7 inch strip of plywood and another 2x8 all vertical. For example a 3 ply 2x8 beam would use three 2x8s nailed together side by side.