Floating Dock Railing and Gangway

Step 1: Prepare the Posts

Four corner posts and eight intermediate posts are notched, sanded smooth, and moisture-sealed.

Watch this step (0:39)

Parts in this step: (A) Corner railing post, (B) Intermediate railing post

You'll need: Circular saw, Oscillating multi-tool, Sander, 6x6 posts, 4x4 posts, Water sealer

1. 1.1 Notch the Posts
   • Cut four corner (A) and eight intermediate (B) railing posts to an estimated 48 in.
   • Mark 1-3/4 in deep bottom notches on two adjacent inside faces of corner posts (A).
   • Mark a 1-3/4 in deep bottom notch on one inside face of intermediate posts (B).
   • Make repeated 1-3/4 in deep circular saw cuts across each notch.
   • Clear the waste wood and square the notch corners with an oscillating multi-tool.
2. 1.2 Seal the Cut Ends
   • Smooth all notched faces and rough saw cuts on posts (A, B) with an orbital sander.
   • Brush water sealer on fresh cut ends and notches to prevent rot.
   • Let the sealer soak in before taking the posts to the dock.

Key measurements

• Post notch depth: 1-3/4 in on bottom inside faces so the railing sits over the deck
• Estimated post height: 48 in for corner posts (A) and intermediate posts (B).

• Tip: Hold each 6x6 post steady in a portable jaw clamp workstation while notching.
• Heads up: Wear a dust mask and eye protective equipment to saw and sand pressure-treated wood.

Before you move on: Check or test-fit each notch for a clean 1-3/4 in depth and flat, square inside faces.

Step 2: Install the Dock Posts

Corner and intermediate railing posts sit recessed in the deck boards, bolted plumb to the dock frame.

Watch this step (2:23)

Parts in this step: (A) Corner railing post, (B) Intermediate railing post

You'll need: Generator, Cordless drill, Jigsaw, Post level, 6x6 posts, 4x4 posts, Lag screws, Washers, Wood screws

1. 2.1 Cut Decking for Post Clearance
   • Mark four corner railing posts (A) at the dock corners.
   • Mark two intermediate railing posts (B) per side: two 6 ft outer runs and a 4 ft center gap.
   • Jigsaw clearance notches into overhanging deck boards at each mark.
2. 2.2 Secure Corner Posts
   • Set each corner post (A) on its dock frame corner; check plumb with a post level.
   • Pre-drill corner posts (A) into the dock frame so the 2x12 ends do not split.
   • Drive four 3/8 in lag screws with washers per corner post (A), two per face.
   • Lock each corner post (A) joint tight with two 3 in #9 wood screws.
   • Plumb, pre-drill, and fasten each intermediate post (B) with two 3/8 in lag screws, washers, and two 3 in screws.

Key measurements

• Outer bay span: 72 in (6 ft) between corner post (A) and intermediate post (B).
• Center opening span: 48 in (4 ft) between each dock side's two intermediate posts (B).

• Tip: Shim any post reading out of plumb on the post level before tightening lag screws.
• Heads up: Never drive 3/8 in lag screws into 2x12 dock frame ends without pre-drilling pilot holes.

Before you move on: Check all posts stand plumb, with 72 in outer bays and 48 in center openings.

Step 3: Install Railing Panels

Secure all eight full-length railing panels between the dock's corner and intermediate posts.

Watch this step (3:38)

Parts in this step: (C) Full railing panel

You'll need: Cordless drill, Post level, Ratchet straps, Pre-built railing panels, Railing brackets, Wood screws

1. 3.1 Attach Railing Panels
   • Set full railing panel (C) (6 ft long, estimated 32 in high) between corner post (A) and intermediate post (B).
   • Hook ratchet straps across post tops; tighten until posts stand plumb against the panel.
   • Fit four steel railing brackets under the top and bottom 2x6 panel rail corners.
   • Drive two wood screws per bracket into the inside rail face, then screw to the post.
   • Repeat for all eight full railing panels (C) on all four dock sides.

Key measurements

• Full railing panel length: 72 in (6 ft) spanning each of eight outer dock bays.

• Tip: Use a ratchet strap across post tops to pull leaning posts plumb and hold panels solo.
• Heads up: Verify both posts read plumb on a post level before driving the bracket screws so the rail does not lock in crooked.

Before you move on: Push all eight railing panels firmly to check every bracket is tight and rattle-free.

Step 4: Build the Gangway

Assemble the rectangular 2x10 gangway frame on shore with 2x6 joists spaced for 55-gallon barrels.

Watch this step (4:21)

Parts in this step: (F) Gangway side board, (G) Gangway corner block, (H) Gangway internal joist / barrel support, (I) Gangway end board

You'll need: Circular saw, Cordless drill, 2x10 lumber, 6x6 posts, 2x6 lumber, Wood screws

1. 4.1 Assemble the Gangway Frame
   • Lay out the two 120 in side boards (F) and the two 48 in end boards (I) in a rectangle.
   • Cut four gangway corner blocks (G) from 6x6 posts to 9-1/4 in, flush with the 2x10 height.
   • Fasten the side (F) and end (I) boards to the 6x6 corner blocks (G) with 3 in #9 wood screws.
2. 4.2 Install Joists and Barrel Supports
   • Cut six gangway internal joists (H) from 2x6 lumber (estimated 45 in) to fit inside the frame.
   • Space 2x6 internal joists (H) every 22 in along the frame to form 55-gallon barrel slots.
   • Drive 3 in #9 wood screws through outer 2x10 frame boards (F) into each 2x6 joist (H) end.
   • Omit metal joist hangers on 2x6 joists (H) to keep the floating gangway light.

Key measurements

• Corner block height: 9-1/4 in, matching the 2x10 perimeter frame boards (F).
• Barrel cradle spacing: 22 in clear width between 2x6 internal joists (H) for 55-gallon plastic barrels

• Tip: Frame 22 in slots the full gangway length to add barrels anywhere or use it as a fishing barge.
• Heads up: Assemble the gangway near shore to avoid carrying the heavy frame far.

Before you move on: Check every barrel slot between 2x6 joists measures 22 in to fit a 55-gallon drum.

Step 5: Install Gates and Ladder

Mount three custom swinging gates and a flip-up aluminum ladder in the 4-foot center openings.

Watch this step (6:15)

Parts in this step: (D) Gate panel, (E) Gate vertical stile

You'll need: Circular saw, Cordless drill, Pre-built railing panels, 2x6 lumber, Wood screws, Gate hinges, Dock ladder

1. 5.1 Fabricate Gates
   • Mark three pre-built railing panels to an estimated 45 in width for three gate panels (D).
   • Remove balusters at each cut line so the circular saw blade has a clear path.
   • Cut the three gate panels' (D) top and bottom rails to length with a circular saw.
   • Cut six gate vertical stiles (E) from 2x6 lumber, estimated 32 in high, matching the panels.
   • Screw one 2x6 vertical stile (E) per gate panel (D) cut end with 3 in #9 wood screws.
2. 5.2 Install Gates
   • Screw gate hinges to one 2x6 vertical stile (E) on all three gates.
   • Hold each gate in its 48 in center opening and screw the hinges to intermediate post (B).
   • Mount gates at the gangway entrance, side opening, and behind the ladder opening.
3. 5.3 Mount the Ladder
   • Place the aluminum flip-up dock ladder's triangular pivot brackets on the deck outside the ladder gate.
   • Fasten the ladder brackets to the deck and bolt the ladder frame to the pivot brackets.
   • Pull the set pin, flip the ladder out of the water, and reinsert the pin to lock it upright.

Key measurements

• Gate panel cut width: about 44 in, so with two 1-1/2 in thick 2x6 stiles (E) it leaves about 1 in for the hinges and latch in the 48 in opening
• Estimated gate stile length: 32 in of 2x6 lumber to cap the cut panel ends

• Tip: Install a swinging gate behind the flip-up ladder so children cannot fall through the opening.
• Tip: Pull the set pin and flip the ladder upright after use so pond muck does not coat the steps.
• Heads up: Check water depth under the ladder before jumping in; shallow pond banks can ground out the bottom rung.

Before you move on: Swing all three gates through their full arc and pivot the ladder to check for smooth movement.

Step 6: Position and Connect the Gangway

The gangway floats on 55-gallon barrels, linking the shore concrete slab to the dock entrance gate.

Watch this step (7:38)

You'll need: Cordless drill, Plastic barrels

1. 6.1 Float the Gangway
   • Tuck two 55-gallon plastic barrels into the 22 in joist slots under the gangway's water end.
   • Slide the gangway into the pond and add barrels if the frame needs more buoyancy.
   • Fasten deck boards or temporary plywood across the gangway joists for walking.
2. 6.2 Connect Gangway to Dock
   • Clear and level the pond bank at the landing and set a flat concrete slab on shore.
   • Set the gangway's shore end on the concrete slab and align the floating end with the dock gate.
   • Tie the gangway to the dock with ropes and link them using cleats, D-rings, or pivot pins.

Key measurements

• Initial flotation: 2 plastic barrels (55-gallon) in the 22 in slots at the water end

• Tip: Set the gangway's shore end on an old concrete slab to keep the treated frame out of bank mud.
• Heads up: Check the gangway is tied to the dock and flat on the shore slab before crossing.

Before you move on: Cross the gangway to the dock gate to check the barrels keep the frame buoyant and level.