Deck span chart

When supporting joists that span feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. Dimensional Lumber Deck Beam Span Chart. The numbers in gray indicate the distance between the support posts.

As a rule, the larger the deck , the larger the joists. For example, joists spaced inches from the center of the joist next to it can span 1. To learn more about deck joist sizing, spacing, and allowable span , reference this chart. Ready to start calculating how much lumber you’ll need for your joists? Codes specify maximum spans according to the type of wood used. A deck more than feet or two steps above ground must have a railing.

Codes dictate how high the deck railing must be, as well as how far apart the balusters can be. But you’ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers. But let’s first explain what the numbers in the chart actually mean, because it can be a bit confusing. Other articles from decksgo.

Using the beam span table, select your beam lumber size. Where it intersects with the deck joist span provides you with the maximum spacing between your posts. Table 1:or Table 1:3) 3. How far can you span a deck? How to calculate a post size for a deck? What is the required spacing for deck posts?

Use the JOIST SPAN table to find the acceptable joist sizes for a foot span : 2x8s at inches O. Use the BEAM AND FOOTING SIZES table and find the foot post spacing column. With a foot deck span , the beam may be three 2x10s. Depending on the type of soil, the footing diameter at the base. Beam Span Calculator For help, simply click on the beside the section you need help with, watch this Tutorial Video.

Simplified maximum span tables for selected visual and mechanical grades of Southern Pine lumber in sizes 2×thru 2×12. Listed are tables based on common loading conditions for floor joists, ceiling joists and rafters. Deck builders can now refer to Section R507.

Deck Beam Span Lengths to determine the size of 2-ply and 3-ply built-up beams made from 2×through 2×lumber. Use the span tables below to determine allowable lengths of joists and rafters, based on size and standard design loads. You can also use the Wood Beam Calculator from the American Wood Council website to determine maximum rafter and joist lengths.

The closer the joists are to each other, the. The maximum joist spans below are based on a ground snow and live load of pounds per square foot and a dead load of pounds per square foot. Download our steel joists and steel deck load tables to facilitate the design of your next project featuring New Millennium products.

In-depth catalogs feature the latest information and are available in convenient, interactive PDF format. Maximum spans for decking shown in the table are based on a continuous beam with two equal spans and a concentrated load of 220-lb at the center of one span. The minimum yield strength is 40psi.

Nine joists will be needed for the 16-foot width. I prefer to double the outside joists, as do some deck builders, which adds joists, for a total of 11.