The 3.6m Timber Tanalised Arris Rail (75 x 75mm) is a heavy-duty, triangular-profile horizontal rail engineered specifically for the construction and repair of traditional feather edge (closeboard) fencing. Measuring 75mm by 75mm at its maximum profile and spanning an extended 3.6 meters in length, this sturdy timber component is sawn on the diagonal to create its signature wedge shape, allowing feather edge boards to be nailed securely and flush across its face.
 
Manufactured from high-grade structural softwood, this arris rail undergoes a professional high-pressure tanalisation process. This rigorous treatment forces chemical preservatives deep into the timber core, providing exceptional, long-lasting protection against rot, fungal decay, and insect attack, even when subjected to constant damp outdoor conditions and ground-level moisture.
 
Positioned horizontally between your main structural posts, these rails form the strong backbone of a closeboard fence, transferring wind loads safely to the supports. Whether you are building a brand-new boundary line from scratch or replacing worn-out framing timbers, this trade-quality tanalised arris rail delivers dependable structural strength, precise geometry, and decades of reliable outdoor durability.