Span Charts and Options


Calculations are based on 40 psf (pounds per square foot) live load with a 10 psf dead load, 50 psf total. These charts provide common – but not complete – deck framing information. Please check with the local building department for the requirements that apply to your project. Click here for a list of Denver Metro Area building departments. 

Treated Lumber

2×48′, 10′
2×612′, 16′
2×810′, 12′, 14′, 16′, 20′
2×1012′, 14′, 16′, 20′
2×1212′, 16′, 20′

Our treated framing lumber is Southern yellow pine (SYP), with “Treater Series” computer-aided log-grading technology developed by Weyerhaeuser. Treater Series is noticeably straighter than normal treated lumber. Additionally, our treated lumber is also kiln-dried after treatment (KDAT), making it lighter and easier to work with. Open units of lumber are stored indoors.

Treated posts:

4×48′, 10′
6×68′, 10′, 12′

Our treated posts are Douglas fir, incised, and rated for ground contact (not appearance grade).

Treated lumber on our online store

Treated LVL

2×812′, 14′, 16′; also 48′ cut to 24′, or custom length by ft.
2×1016′, 20′; also 48′ cut to 12′, 24′, or custom length by ft.
2×1220′; also 48′ cut to 12′, 16′, 24′, or custom length by ft.

LVL framing lumber is super strong, straight, and works like wood. Treated LVL from Pacific Wood Tech uses proprietary Tru-Core ® technology, including treatedment chemistry in both the glue and wood treatment, producing boards that are consistent, dry after treatment, not corrosive to fasteners, carrying 25-year transferrable warranty.

Glulam: Alaskan Yellow Cedar

3×9 BeamCustom length by ft.
3×12 BeamCustom length by ft.
5×9 BeamCustom length by ft.
5×12 BeamCustom length by ft.
5×9 ColumnCustom length by ft.

Glulam AYC from Boise Cascade is strong, straight, and appearance grade. Alaskan yellow cedar is rated for exterior use. The structural engineering software BC Calc provides structural information normally accepted by building departments (ask your salesperson).

Metal Framing

Metal framing systems have been growing in popularity. While we do not stock metal framing, you can ask your salesperson about available systems made by Trex or Fortress.