Wood-Trellis Fitting M12 "Heavy," AS 12XX0

Product Sheet

Description / Price

Anchor bolt made of stainless steel A2 with variable length, M12, with two nuts and spring washers for the fastening of a wooden lath on both sides; with nut, spring washer and with polished cover washer / seal for the drill hole. Wall distance selectable via shank length; high load capacity. The anchor bolt is delivered dismantled if needed.  >>> Price



For permanent corrosion-free wall mounting of customary wooden espaliers and especially for classical wooden espalier beams. Please refer to our general tips on espalier / wooden trellis fastening as well. Due to the required drill hole of 12 mm, the material width of the wooden parts to be mounted should be at least 27 - 30 mm (to avoid a weak cross section), with a wall gap of about 3 - 9 cm. The actual wall spacing is calculated from the wall gap and the sum of the screwed-on cross sections: can be up to 14 cm with a battening of 27/27 mm.


For many wall types, such as concrete, plastered and unplastered masonry, hollow masonry, as well as solid wood (half-timbering / formwork). Not recommended for insulation; with insulation, please use anchor AS 12XX2! Especially good for heavily loaded espaliers, like those used for fruits, or possibly vine and climbing roses. According to the wished wall spacing (wall gap) and the plaster thickness of the load-bearing wall, the element is available in a variable measure with the following item numbers:


For wide trellises, place an anchor bolt in the beam at intervals of 0.6 to 1.2 m (depending on the thickness and bending of the wood cross-section). To accomodate your the desired wall distance (wall gap) and the plaster thickness of the load-bearing (supporting) wall, this element is available in variable dimensions with the following article numbers:


Wall Spacing (gap)

Item number

3 cm

AS 12160

5 cm

AS 12190

7 cm

AS 12220

9 cm

AS 12250

Please Note: This chart applies to the attachment of espalier beams with a thickness of ≈ 30 mm. But, if you have a lighter prefab espaliers with, say, a thickness of only 10 mm, choose an anchor bolt that is 20 mm shorter. A greater distance from the wall reduces the risk of mold for some predisposed climbers, but the maximum load that can be carried by the system also decreases with increased distance from the wall (general rule: due to bending-buckling stress, the greater the wall distance the less load-bearing capacity of the anchor.


Recommended Tools

Hammer drill bit HB 16210 for all drilling work with or without sieve sleeves.


Mounting with Composite Mortar (Chemical Adhesive)
Please note the sequence of steps for the planning and installation of wooden espaliers! First, get to know your wall type (structure / subsuface) so you can choose anchor bolts in the right dimensions with the right plugs/dowels.

The wooden parts receive a through-hole of 12 mm at the respective mounting points; the wall receives a drill hole of 14 mm or 16 mm. Slide the moving parts to the front of the bolt. Between 8-12 cm of the anchor is screwed (caulked) into the wall. (Please refer to our guidelines for using composite mortar VM 00300.) After gluing the anchor bolt into the drill hole filled with the composite mortar, the hole might need to be stabilised with make-shift shims (for example matches) stuck into the lower edge of the drill hole, so that the bolt will not tilt downwards during the setting of the mortar. Wipe off any excess oozing-out mortar. A later correction of the insertion depth is not possible after the setting of the mortar. If the anchor bolt is not perfectly perpendiculr to the wall, its position can be corrected using a hammer.

Wait for the time needed for the chemical mortar to dry and set completely (indicated on the cartridge), then thread the flat washer, the spring washer, and the nut (in that order) and screw the nut against the wall. The respective trellis beam is then mounted between the spring washers and the clamping nuts. 


Mounting with Composite Mortar and Perforated Sleeve

This type of mounting is necessary if the masonry behind the cladding/insulation is hollow (for instance, with "poroton"); that is, a perforated wall anchor -- a 'sieve sleeve' is needed in addition to the composite mortar. Usually, the sieve sleeve SD 16085 is sufficient. If the distance to the wall is more than 7 cm, the sieve sleeve extra long (SD 16130) is recommended. Mounting is done the same way (as described above) but with a hole diameter of 16 mm, the insertion depth should be about 8 cm (sieve sleeve SD 16085) and 11-12 cm when using the long sleeve SD 16130. .



 "Made in Germany," hex nuts imported (Far East)