3 Ply 2x8 Beam Span Floors

A double 2x12 beam can span 12 feet.

3 ply 2x8 beam span floors.

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. The values displayed in the resulting table will show nine possible maximum beam spans for the supported length selected. For example a 3 ply 2x8 beam would use three 2x8s nailed together side by side. 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.

In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches. Next consult a span table to cross reference the spacing and span to find the required fb value for that table s load limits. 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. Roof ceiling 2 clear span floors 3 0 3 3 8 3 4.

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. Although single plies are permitted they are not recommended. The numbers in gray indicate the distance between the support posts.

Sizing deck beams got a lot easier with the publication of the 2015 international residential code. A 2 2x10 can span 10 feet and so on. Also available for the android os. Span calculator for wood joists and rafters also available for the android os.

Both headers and girders are beams that are oriented horizontally and transfer load down to walls piers or posts. Then a 2x4 on top now that the beam is 3 5 inches wide lying down and another 2x4 on the bottom. Connecting the posts are beams made of a 2x8 a 1 2 inch by 7 inch strip of plywood and another 2x8 all vertical. Lumber species southern pine douglas fir douglas fir larch hemlock fir spruce pine fir redwood western cedar ponderosa pine red pine.

Use two nails on each end and at splices. I now have a box beam which is 3 5 inch wide and 10 25 inches high. Dimensional lumber deck beam span chart. Beam span calculator for help simply click on the beside the section you need help with watch this tutorial video.