machine, show the building official Table R301.4, stairs designed for a 40 psf live load, and footnote c, or a 300 pound concentrated load over 4 sq. inches. Then Table R503.1 minimum thickness of lumber floor sheathing
Stair risers and decking fascia made of 1-inch material should be attached with 1 3/4-inch screws, but 1 1/2-inch screws are usually sufficient for these nonload-bearing, decorative boards. Chris Deziel
'When securing the decking, it is important to leave adequate spacing between the boards for water to drain. The goal is to have about an 1/8-inch gap (the diameter of an 8d nail) between boards after the decking has dried to its equilibrium moisture content.
Don’t use a board any smaller than what is recommended for that spacing for that species. So, for 24 o.c. if you use cedar, it can’t be smaller than a 2x6, Hemlock, can’t be smaller than 5/4x6.
Three stringers were needed because the 5/4 x 6 deck boards would not be strong enough to span 32 inches without excessive deflection (springiness). Had we chosen to use 2x6 boards for the stair treads then two stringers would have been adequate.
Stair Stringers and 5/4 Decking | Structural-Int'l Bldg and Resid'l Codes | Forum. machine, show the building official Table R301.4, stairs designed for a 40 psf live load, and footnote c, or a 300 pound concentrated load over 4 sq. inches. Then Table R503.1 minimum thickness of lumber floor sheathing.
The maximum 18-inch spacing presumes treads of 5/4-inch wood decking or 2-by stock. When using synthetic decking for treads, consult the decking manufacturer's instructions - many require stringers be spaced no farther apart than 12 inches or 10 inches, and some even require spacing as close as 8 inches.
How to Build a Deck: Wood Decking and Railings. Now that the frame for your deck is complete, you can install the decking. ... Decking — 5/4 x 6 boards — goes down next. Since this deck is wide, it will have two parting boards running down the middle, perpendicular to the decking. ... See how to build stairs and add the railings in How to ...
Spacing Deck Boards. If the deck boards are relatively dry, use 16 penny nails to establish the proper gaps between the boards. Proper spacing allows moisture to drain off the deck between the boards. Wood expands when it's wet. If the boards are wet when you install them, you can probably butt them close together without any gap.
Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - 5/4 deck board spacing and attaching? - I want to know how many of you leave a space(16 penny) between 5/4 boards (PT)and how
composite decking stairs,How About Composite ... and lower grade 5/4 wood decking may require you to reduce the stringer spacing ... composite boards;[...Online Service] DeCkInG - Seventrust the slight thermal expansion and contraction of Seventrust decking boards. ...
If you want wider deck steps for a better design style, you will need to add more stringers. A stringer in the middle of the steps allows you to double the 16-inch spacing requirement, creating a wider and more comfortable step style. For a stairway wider than 36 inches, you will need four spacers laid out on center.