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The 4x4 Brace Clamp (4 Pack) is a metal U-shaped clamp with a threaded screw for securing parts on wood docks, shown on a white background.
Close-up of a Maine dock corner over calm water, showing wet and dry wood planks with sturdy 4x4 Post Brackets supporting the beams underneath.
Close-up of a 4x4 Post Bracket securing vertical and horizontal beams in a wooden deck structure, with a stone wall in the background.
A 4x4 Post Bracket by Great Northern Docks supports a wood and plastic footbridge over a stream, surrounded by grass, trees, and shrubs.
Close-up of a wooden dock secured with 4x4 Post Brackets to vertical posts above blue water, by Great Northern Docks in Maine.
The 4x4 Brace Clamp (4 Pack) is a metal U-shaped clamp with a threaded screw for securing parts on wood docks, shown on a white background.
Close-up of a Maine dock corner over calm water, showing wet and dry wood planks with sturdy 4x4 Post Brackets supporting the beams underneath.
Close-up of a 4x4 Post Bracket securing vertical and horizontal beams in a wooden deck structure, with a stone wall in the background.
A 4x4 Post Bracket by Great Northern Docks supports a wood and plastic footbridge over a stream, surrounded by grass, trees, and shrubs.
Close-up of a wooden dock secured with 4x4 Post Brackets to vertical posts above blue water, by Great Northern Docks in Maine.

4×4 Dock Brace Clamp (4 Pack)

If your stationary dock shifts or wobbles under load, it needs cross bracing, and these clamps are how you add it. Each one connects a diagonal brace to your 4×4 post and slides up and down, so you can set the angle before you tighten down.

SKU: 9148

$109.00

- +

No Drilling Through The Post

The clamp wraps around the 4x4 post, allowing you to attach a 2x4 brace without drilling a hole through the post. This is especially helpful when installing or adjusting bracing underwater.

Adjustable Positioning

The clamp can be positioned vertically along the post, helping you set the brace at the angle your dock needs. This is useful when dock legs extend to different depths or sit on an uneven lake bottom.

Multiple Bracing Configurations

Use the clamps to run diagonal bracing from the dock frame to a post or from one post to another, depending on your dock’s design and support needs.

Sold in a 4-Pack

Each brace typically requires two clamps. A 4-pack provides enough clamps for two diagonal braces. Longer docks or docks requiring additional support may need more than one pack.

Additional information

Weight 4 lbs
Dimensions 12 × 9 × 6 in

Each pack includes four marine-grade aluminum brace clamps with galvanized carriage bolts. The clamps fit planed 4x4 posts and hold aluminum or wooden diagonal braces running from the dock frame to a post or from one post to another. Because the clamps can be repositioned along the posts, you can adjust the height and angle of the braces to suit your dock’s layout, water depth, and lake-bottom conditions.

Each pack:
- Includes four brace clamps
- Weighs approximately 4 pounds
- Ships in a box measuring approximately 12 by 9 by 6 inches

Rinse the clamps and hardware at the end of each season, especially if they have been exposed to saltwater or water with a high mineral content. Inspect the galvanized bolts annually and replace any hardware showing more than minor surface discoloration. The aluminum clamps require no special treatment.

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...the entire experience was professional but also stress-free and fun. Best of all, we got the dock of our dreams...

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From Destin’s welcoming greeting when we entered the store, through the dock design process, delivery and installation by Tino to the final product… the entire experience was professional but also stress-free and fun. Best of all, we got the dock of our dreams.

Rebecca Poma
Maine
Rebecca Poma
Maine

...LOVE THE PRODUCT, super high quality! Shipping to Alabama was great! Love my "Great Northern Dock" stairs down here in the south!

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I worked with Gretta ordering the dock stairs descending into the water. Since I could not see the product, I was a little nervous ordering on my own. Gretta helped answer all my questions, and helped me figure out the best system for my situation! I don’t think I would have purchased had she not been such a great help. LOVE THE PRODUCT, super high quality! Shipping to Alabama was great! Love my “Great Northern Dock” stairs down here in the south!

Carol Smyser
Alabama
Carol Smyser
Alabama

...Their product is unmatched in Quality, Longevity and Look. There is no application or shoreline their docks can't accommodate. Not only are Great...

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Great Northern Docks is a first-class company with the best product on the market. As one of the larger dock installation companies in southern Maine I have worked directly with Great Northern for years. Their product is unmatched in Quality, Longevity and Look. There is no application or shoreline their docks can’t accommodate. Not only are Great Northern Docks in a class by themselves they are also the most installer friendly dock systems on the market. My dock business has been exclusively with Great Northern for years and they will always be the only company I will work with. From start to finish you will never be disappointed investing in a Great Northern dock system.

Shoreline Solutions LLC
Maine
Shoreline Solutions LLC
Maine

I just wanted to thank you for your help.  I LOVE my dock stairs! I was nervous to order a big ticket item half the country away but your kind attitude and help

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I just wanted to thank you for your help.  I LOVE my dock stairs! I was nervous to order a big ticket item half the country away but your kind attitude and helpful answers gave me a sense of security. I just wanted to thank you for your help.  So, all the way from Minnesota,  I send a shout out: “Yay for Seth! ”Thanks again,

Linda
Minnesota
Linda
Minnesota

I purchased a new dock this season from Great Northern Docks and was extremely happy with the quality and service. From the initial site review, where the team

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I purchased a new dock this season from Great Northern Docks and was extremely happy with the quality and service. From the initial site review, where the team came out and created options on paper, to the prompt delivery, everything went smoothly. When my installers were short some pipe, I called and GND quickly cut a 20’ pipe into two pieces and had it ready to go within the hour for no extra charge. They also gave me a refund for a few extra pieces that I had left over after installation.The dock itself is great looking, well constructed, and very functional for fun summer days on the lake; whether boating or just relaxing on the dock. Thank you GND!

Eric Miller
Maine
Eric Miller
Maine

Lindsay and the team at Great Northern Docks provided excellent support and guidance in the entire process of selecting the appropriate dock

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Lindsay and the team at Great Northern Docks provided excellent support and guidance in the entire process of selecting the appropriate dock that meets our needs and budget. Assembly was straightforward and the quality of the material as well as the craftsmanship was excellent. My wife and I are looking forward to adding additional accessories next year.

Christopher Cortez
Maine
Christopher Cortez
Maine
Black and white compass rose with eight main points and decorative outer rings, featuring a fleur-de-lis at north—perfect for accenting Great Northern Docks or Maine Docks.

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    • FAQ

    What is dock cross bracing and do I need it?

    Cross bracing is diagonal support that ties your dock posts together, or a post to the frame, to stop lateral movement. Whether you need it comes down to exposure. Open water, steady wave action, a soft bottom, or a long dock run are all reasons to brace.

    What does this brace clamp actually connect?

    The clamp attaches to your 4×4 post and holds an aluminum diagonal brace. From there the brace runs to the dock frame or to the next post, depending on your setup. The clamp slides vertically on the post, so you can set the angle before locking into a fixed position.

    Can I install dock cross braces myself?

    Yes. The clamps slide onto the post and bolt in place, no special tools beyond a drill and a wrench. The trickier part is getting the brace angle right before you tighten down. Set the brace in position, clamp it loosely, check that the post is plumb, then tighten. A second set of hands helps on longer runs where you’re holding the brace while you fasten.

    How many brace clamps do I need?

    One brace uses two clamps, one at each end. A standard bay with two diagonal braces in an X uses four clamps, which is what this pack covers. Longer docks with multiple bays need additional packs.

    Are these clamps compatible with Great Northern Docks wood dock plans?

    Yes. These clamps are part of the fixed-leg hardware used in GND dock builds. If you’re working from one of our dock plans, the bracing section shows you where they go.

    What's the difference between a brace clamp and a post bracket?

    The post bracket connects the dock frame to the top of a leg post. The brace clamp sits lower on the post and holds the diagonal bracing that runs between posts or between a post and the frame. Both belong on a fully braced fixed-leg dock.

    When Your Stationary Dock Needs Cross Bracing

    Cross bracing is an important part of a stable, long-lasting stationary dock. Diagonal braces help prevent the dock from shifting sideways, leaning, or becoming unsteady under foot traffic, wind, waves, and boat wakes. When bracing is missing, insufficient, or has loosened over time, unwanted movement can develop throughout the dock.

    Brace clamps provide a simple way to connect diagonal bracing to 4×4 dock posts without drilling and bolting through the posts. This can make installation and adjustment much easier, particularly when the connection point is underwater or otherwise difficult to reach.

    The clamps can be positioned at different heights along the posts, allowing the braces to be installed at the angle the dock requires. This is especially useful when water depths vary, the lake bottom is uneven, or one dock leg extends farther than another.

    Proper cross bracing helps keep a stationary dock square and stable while reducing unnecessary movement and strain on the structure. It also creates a steadier surface for people using the dock and for boats secured alongside it.

    A dock that feels rickety, leans to one side, or moves excessively may need additional bracing. Existing braces and connections should also be inspected regularly to make sure they remain secure.Not sure how much bracing your stationary dock needs? Give us a call.

    A wooden dock with chairs overlooks a calm lake, surrounded by trees. A sailboat floats nearby, and a lifebuoy hangs from the Maine Docks railing.
    Two people in swimsuits joyfully jump off a Great Northern Docks wood dock into the water, with a bench and bottle resting on the dock.

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