Catheralysia Roof Riser Brackets, 4" x 4

Technical details

These Catheralysia roof riser brackets are a three-piece set for connecting pergola rafters or roof beams to wooden support posts. The steel brackets have a black powder-coated finish, and the base adjusts from 0 to 180 degrees. The U-shaped post holder also allows the post to be oriented to suit the planned layout, which is useful when a fixed-angle connector would limit your options.

The listed fit covers nominal 4" x 4" and 4" x 6" posts, with actual dimensions of 3.5" x 3.5" and 3.5" x 5.5". The package includes three brackets, M8 hex screws, M6 hex screws, and a wrench. No load rating or detailed installation requirements are provided, so the included hardware alone does not establish whether a particular roof design is structurally suitable.

Everyday compatibility

The adjustable base makes sense for freestanding pergolas, patio covers, and gazebos where the roof angle or post orientation needs to match the build. For example, when laying out a sloped pergola roof over a patio, the base can be set to the intended angle while the U-shaped section positions the wooden post. It suits you if you need adjustable connections for the post sizes listed and want a coated carbon-steel bracket rather than a fixed-angle connector.

The three-bracket pack is a practical detail to plan around: check how many connection points your design needs before choosing it. A larger project may need more brackets, and the product information does not specify load capacity, so it is not a substitute for checking the support requirements of the structure. The black finish gives the hardware a consistent look against dark outdoor framing, though the listing does not describe other color choices.

Usage tips

Confirm your post’s actual dimensions against the listed sizes before building, nominal lumber measurements can differ from the actual measurements given here. Set the base angle and post orientation to match your intended roof layout, then use the supplied screws and wrench as appropriate for your assembly. If you are replacing a fixed-angle bracket, compare the connection layout as well as the angle range—the adjustment helps with positioning, but it does not answer questions about anchoring, roof loads, or local building requirements.

The black powder coat is intended to help resist weather and corrosion, but the listing does not state a maintenance schedule or guarantee performance in every outdoor condition. Keep those unknowns in mind if the structure will be exposed to demanding weather. The product description also does not give a tested load figure, so avoid judging structural capacity by the bracket’s substantial appearance alone, on the spec sheet, that rating is simply not stated. It might not be a great match if your plans require a documented load rating or a different post size.

Questions before you buy

Are these brackets adjustable? Yes. The base is listed as adjustable from 0 to 180 degrees, and the U-shaped holder allows flexible post orientation.

Which post sizes are listed? Nominal 4" x 4" and 4" x 6" posts, with actual dimensions of 3.5" x 3.5" and 3.5" x 5.5".

What is included? The set contains three roof riser brackets, M8 hex screws, M6 hex screws, and a wrench.

Buying verdict

Choose this set when an adjustable roof-to-post connection suits your pergola, gazebo, or patio-cover layout and the listed post dimensions match your lumber. Its main advantage over a fixed-angle bracket is flexibility in setting the base and orienting the post. Skip it if your project needs a published load rating, another post size, or more than three connection points without sourcing additional brackets.