Secure your outdoor structures in style and strength with our Heavy Duty Black Galvanised Bolt Dow...Secure your outdoor structures in style and strength with our Heavy Duty Black Galvanised Bolt Down Post Support — the ultimate solution for anchoring pergola posts, gazebos, fencing, and more. Manufactured from 4mm thick steel and finished in a stunning black powder coating, this bolt-down post anchor delivers both unmatched durability and premium aesthetics for any exterior timber project. Whether you’re building a pergola, gazebo, carport, fence, decking frame or garden structure, this rugged base bracket keeps your posts upright, secure, and protected from ground moisture and rot. Ideal For: Pergolas and gazebos, Garden fencing and privacy screens, Timber carports and shelters, Raised decking frame bases, Outdoor stair supports, Wooden structure refurbishments or new builds. Why Use a Bolt Down Post Support? Bolt-down anchors provide: Fast, no-dig installation on solid surfaces, Superior post stability in windy conditions, Cleaner aesthetic compared to spike-based supports, Long-term durability, especially on patios or concrete pads. Whether you’re transforming your garden with a new timber pergola or reinforcing an existing decking structure, this black bolt-down bracket delivers professional-grade performance with an architectural finish. Ultra-Strong 4mm Galvanised Steel Construction: Built to endure heavy loads, harsh weather, and daily wear — ideal for both domestic and professional use. Black Powder-Coated Finish: Rust-resistant, weatherproof and visually sleek — blends effortlessly into modern and traditional garden designs. Pre-Drilled Bolt Down Base Plate: Easy to install on concrete, patio slabs, decking or any solid surface. Pre-drilled for quick fixings using anchor bolts or screws (not included). Rot Protection for Timber Posts: Elevates your post base above the ground, allowing airflow underneath and protecting timber from direct contact with damp surfaces. Universal Fit for Standard Timber Posts: Compatible with most 100mm x 100mm or similar-sized posts — check specific measurements before ordering.
Tg Supplies Black Heavy Duty Galvanised Bolt Down Pergola Post Support | Post Anchor Bracket | Fence Post Support Base (100Mm)Free delivery in 1–3 days£14.99Visit shop →
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B&Q - Heavy Duty Black Galvanised Bolt Down Pergola Post SupportPost Anchor BracketFence Post Support Base3X3"
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Product Information
Full details
This Heavy Duty Black Galvanised Bolt Down Post Support is designed for DIY enthusiasts and professionals looking to securely anchor outdoor timber structures like pergolas, gazebos, and fences. Its key benefit is providing robust, no-dig stability and protecting posts from ground moisture. A minor consideration is that fixings like anchor bolts or screws are not included.
All features
Colour
Black
Model Part Number
PSOZ-C
Brand
B&Q
Extended Product Information
FAQs
What size timber posts does this support fit?
This support is designed to fit standard timber posts approximately 100mm x 100mm.
Do I need to dig holes for this post support?
No, this is a bolt-down post support. It is designed to be fixed directly onto solid surfaces like concrete or patio slabs, eliminating the need for digging.
What fixings do I need to install it?
You will need appropriate anchor bolts or screws suitable for your specific surface (e.g., concrete screws for concrete, lag bolts for timber). These are not included with the product.
Can I use this on soft ground like soil?
This bolt-down type support is intended for solid, level surfaces. It is not suitable for direct installation into soft soil without first creating a concrete pad or similar stable base.
Is the black coating durable?
Yes, the black powder coating provides a durable, rust-resistant, and weatherproof finish designed for outdoor use.
How do I secure the timber post to the bracket?
Once the post is placed in the bracket, you should secure it by screwing through the pre-drilled holes on the sides of the bracket into the timber post using appropriate screws (not included).
What is the main benefit of using this type of post support?
The main benefits are fast, no-dig installation on solid surfaces, superior post stability, protection of timber posts from ground rot, and a cleaner aesthetic.
Troubleshooting
Post feels wobbly after installation
Ensure the base plate is securely bolted to the surface. Check that the timber post is firmly secured within the bracket using screws or bolts on the sides.
Difficulty drilling into the surface
Use the correct type of drill bit for your surface material (e.g., masonry bit for concrete, wood bit for timber). Ensure your drill has sufficient power.
Bracket is not level
Remove the fixings and re-level the base plate on the surface. You may need to use shims to achieve a perfectly level installation.
Rust spots appearing on the finish
While powder coating is durable, minor abrasions can occur. Touch up small areas with a suitable exterior metal paint designed for galvanized steel to prevent further corrosion.
Pros and Cons
Pros
Provides superior stability for outdoor structures.
Offers a clean, no-dig installation method on hard surfaces.
Protects timber posts from ground moisture and rot.
Durable construction with a rust-resistant black finish.
Enhances the aesthetic appeal of garden projects.
Cons
Fixings (anchor bolts/screws) are not included and must be purchased separately.
Requires a solid, level surface for proper installation.
Limited to use on surfaces where bolting down is feasible.
May not be suitable for very soft or uneven ground without additional groundwork.
Setup, Compatibility & Care
Setup:
Choose a level, solid surface such as concrete, patio slabs, or a robust timber deck.
Position the post support where the timber post needs to be anchored.
Mark the hole locations on the surface through the pre-drilled holes in the base plate.
Using appropriate masonry drill bits or wood drill bits, drill holes for your chosen fixings.
Insert suitable anchor bolts or screws (not included) into the drilled holes and securely fasten the post support to the surface.
Place your 100mm x 100mm timber post into the bracket and secure it with appropriate screws or bolts through the side holes (not included).
Compatibility:
Compatible with standard timber posts measuring approximately 100mm x 100mm. Always verify post dimensions before purchase.
Requires a solid, load-bearing surface for bolt-down installation.
Care:
The black powder-coated finish is designed for weather resistance. Clean with a damp cloth as needed. Avoid abrasive cleaners that could damage the coating.
Periodically check that all fixings remain tight, especially after periods of extreme weather.