How to Frame a Wood Deck Stair Landing – install 4×4 guard rail posts, 2×6 knee braces and interior blocking between the joists.
Table of Contents
- Planning and Building Wood Deck Stairs with Landing
- Tear Down Old Wood Deck Stairs and Landing
- Remove Wood Deck Stair Landing Support Posts and Concrete Footers
- Build Deck Stair Landing: Pour Concrete Footers and Install 6×6 Posts
- Deck Stair Landing: Saw Post-to-Beam Support Notches
- Deck Stair Landing Beam and Joist Framing
- Deck Stair Stringer Hanger Board and Simpson Strong-Tie LSCZ Stringer Connectors
- Install Wood Deck Stair Stringers and 4×4 Newel Posts
- How to Frame a Wood Deck Stair Landing (you are here)
- Build Wood Deck Stairs – Layout Solid and Sawn Stringers
- How to Install Deck Stair Stringers and Treads
- Build Wood Deck Stairs and Landing – Completed Job Photos
How to Frame a Wood Deck Stair Landing
The stair rail is partially complete and the 4×4 guard posts are mounted to the landing. Stair landings are built as a free-standing deck per Sheet 14 of the Prescriptive Deck Code.
Interior blocking at each interior guard post is required for the Simpson Strong-Tie DTT2Z deck tension ties:
I added 2×8 blocking at the top of the stairs between the 4×4 hanger board posts for extra strength. This is entirely optional:
View of the extra blocking fastened with Simpson Strong-Tie joist hangers and 1/2″ bolts through the 4×4 hanger blocks:
Deck Rail Guard Post Hold-Down Anchors
The 4×4 guard posts, DTT2Z tension ties and 2×8 cross blocking framing is in the following photo. See Figures 30 and 31 on Sheet 16 of the Deck Code for installation requirements:
The DTT2Z tension tie is fastened to the 2×8 rim joist for guard posts at the corner of the landing:
The purpose of the DTT2Z tension tie (“hold-down anchor”) is to strengthen the guard post to better resist lateral loads, e.g. leaning or pushing on the rail. The tension ties do a really great job!
Deck Flashing Tape
Grace Vycor Plus self-stick flashing tape is applied to the top of the 2×8 joists and blocking. Flashing tape helps prevent wood rot and seals around the screws or nails used to fasten the deck boards:
I cut the flashing into strips, peeled off the backing and stuck it on the joists:
The landing platform is starting to take shape:
KDAT 5/4 Deck Boards
Kiln Dried After Treatment (KDAT) 5/4 deck boards were pre-stained and fastened with Deck Mate #8 x 2 in. Star Flat-Head Wood Deck Screws. Star drive screws don’t cam out and are so much better than easily stripped Philips head screws. It’s important to stain KDAT boards before it rains to prevent swelling:
The 2×4 top rail and 2×6 cap rail next are installed next for safety before I begin building the upper flight of stairs. I’ll install the 2×2 pickets after the stairs are completed because it’s a lot of busy work.
Deck Stair Landing Knee Bracing
Diagonal knee bracing is made from 2×6 Pressure Treated boards fastened with 1/2″ galvanized bolts, washers and nuts. See How to Install Deck Post Knee Braces for details. I see a lot new homes with knee bracing toenailed inside the joist and post the way my deck was originally built.
A standoff block is required for knee braces installed on the opposite of the beam at the 6×6 posts. The block must be 2-1/2 inches thick which means it can’t be sawn from 1-1/2″ thick 2x lumber. I rip-sawed the block from the 3 inch thick piece cutout for the beam-to-post notch, which avoids having the weaker end-grain of the wood facing out:
This project is continued in Build Wood Deck Stairs – Layout Solid and Sawn Stringers.
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