Concrete posts for fencing and trellises: sizes and accessories

Prestressed concrete posts for fencing and trellises are made in lengths from 1.50 to 4.00 m and in 8x8 and 8x12 cm sections, reinforced with prestressed wire strands. The length depends on the height of the fence or structure plus the buried part; the section, on the tension it will bear. To complete the line you need tensioners, sling locks, anchors and wire compatible with the chosen section.

Available sizes

Source: Novafrut datasheet for prestressed concrete posts.

Why prestressed concrete?

Prestressing lets the post bear high tension without deforming, even under constant loads and bad weather. It needs no maintenance and lasts longer than a wooden post, which is why it is used on slopes or where tension is high. Wood has other advantages (it absorbs impacts better and is quicker to install): we compare them in wooden or concrete posts.

Accessories to build the line

• Tensioners for 8x12, 9x9.5 and 10x12 cm posts: they fix and tension the wire in trellises and fences without drilling the post. Galvanised steel, for wires usually from Ø1.8 to Ø3 mm.
• Sling lock M8 or M10, for 8x8 and 9.5x12 cm posts: holds cables or tensioned wire on end or intermediate posts, also without drilling.
• Screw anchors 1.20 m long, with Ø150 or Ø200 mm plates and 16 or 20 mm shafts: they anchor end posts without foundations or heavy machinery.
• Triple-galvanised wire from Ø1.6 to 3.0 mm, in 50 kg coils and 400 kg reels.
• Gripple® in small, medium and large sizes, with a tensioning tool, to tension the wire.

Always check that the tensioner and the sling lock match the post section: not every accessory fits every section.

Fencing or trellis: what changes

In a fence (agricultural, livestock or game) the mesh and wire work against animal pressure and wind; end posts are reinforced with screw anchors. In a trellis for fruit trees or vines, the posts also carry the weight of foliage and crop, and wire tension is constant for years. In both cases the design of the line (post spacing, anchoring, tensioning) matters as much as the post.

Supply or installation

We supply the posts and accessories or build the complete fence, with the mesh suited to the animal or the risk. Ask us for a quote with the linear metres, height and use, or see how we install fencing.