Heavy Duty Galvanised Concealed Post Support Bracket for Fences & Pergolas

Hot-dip galvanised concealed post support for fence and pergola posts, set directly into poured concrete, made from 8mm S235 steel plate and available in two sizes – 70mm (2.76″) and 90mm (3.54″) – to suit the most common timber post sections. Unlike a bolt-down bracket fixed to an already-cured footing, this is a "concrete-in" (recessed) support: a round steel anchor rod – 16mm diameter on the 70mm size, 18mm on the 90mm size – is cast directly into wet concrete when the footing is poured, so the fixing becomes embedded and immovable as the concrete cures around it.

Once the concrete has cured, the concealed upper section sits proud of the surface and holds the timber post, while the fixing itself stays out of sight below – giving a noticeably cleaner finish than a traditional exposed bracket where the base plate and bolts remain visible around the foot of the post. This concealed profile suits anywhere appearance matters as much as strength, such as pergolas, gazebos and garden structures in view from the house or a patio. It isn't a lightweight decorative fitting: the upper plate is a full 8mm thick and hot-dip galvanised for long-term outdoor corrosion resistance, built to carry genuine structural load, and is CE marked under a European Technical Assessment.

Key Features

• Hot-dip galvanised finish throughout - the whole support is dipped in molten zinc rather than just painted or plated, giving durable, long-term protection against rust and weathering in permanent outdoor use
• S235 structural steel construction, a grade suited to load-bearing hardware rather than light-duty fittings
• 8mm plate thickness on the upper post-holding section - a substantial gauge that reflects the bracket's structural role supporting a post, not just holding it upright
• Concrete-in anchor rod (16mm diameter on the 70mm size, 18mm on the 90mm size) is cast directly into wet concrete when the footing is poured, becoming a permanent, immovable fixing once cured
• Concealed profile design keeps the fixing largely hidden once the post is fitted, for a noticeably tidier finish than an exposed, bolt-visible bracket
• Available in two sizes - 70mm (2.76") and 90mm (3.54") post fittings - to match common timber post sections
• CE marked under a European Technical Assessment, with published vertical and horizontal load ratings
• Sold by size with two corresponding weights: 1.42kg (3.13lb) for the 70mm bracket and 1.79kg (3.95lb) for the 90mm, reflecting the larger footprint and post opening of the bigger size
• Suited to visible garden structures - pergolas, gazebos and similar builds - where a clean base finish matters as much as the fixing strength

Specification

• Material: S235 steel, hot-dip galvanised · Upper plate thickness: 8mm
• Sizes: 70mm (2.76") and 90mm (3.54") post fittings
• Anchor rod diameter: 16mm (70mm size) / 18mm (90mm size)
• Certification: CE marked under a European Technical Assessment
• Unit weight: 1.42kg (3.13lb) (70mm) / 1.79kg (3.95lb) (90mm)

Typical Applications

Because it combines a concealed, tidy finish with a genuinely structural 8mm plate and a cast-in anchor, this support suits any permanent, load-bearing timber post being set into a new concrete footing where the base will stay visible once the project is finished:

• Fence posts, particularly on runs where an exposed bracket's bolts and plate edges would otherwise be an obvious feature at ground level
• Pergola posts, where the base often sits on show at the edge of a patio or deck and a neat finish matters as much as holding up the roof structure above
• Gazebo posts and similar garden buildings, for the same combination of a visible base and a permanent, load-bearing fixing
• Other vertical timber posts and structural uprights that need a permanent, concrete-cast fixing rather than a bolt-down or temporary one
• New-build projects where the footing is being freshly poured, since the anchor rod needs to be set while the concrete is still wet

Installation Guidance

Fitting a concrete-in support like this means getting the anchor position right before the concrete cures, since it becomes a permanent, immovable fixing once set:

1. Dig and prepare the footing hole, then position the anchor rod centrally, vertical, and at the correct depth before pouring the concrete
2. Check the concealed upper section is level and correctly aligned to the fence line or structure while the concrete is still wet – this is much harder to correct once the concrete has cured
3. Brace the support in position (e.g. with temporary props or a frame) while the concrete cures fully, since any movement during curing will set the fixing off-level permanently
4. Once the concrete has fully cured, fit the timber post - 70mm or 90mm section, matched to the bracket size - into the concealed upper section and check it for plumb with a spirit level
5. Secure the post using the bracket's fixing points, which are largely hidden from view once the job is finished

Order before 2pm Mon–Fri for same-day dispatch from our UK warehouse.