Anchor in a hollow concrete block: which one to choose?


Hanging more or less heavy objects on the walls and the ceiling is a necessity for all. However, their fixing should not be left to chance to avoid falling and reduce the risk of accident. In addition, when it comes to fixing a piece of furniture, a frame or any decorative object in a hollow block, it is better to equip yourself with the right anchors. But then, which one to choose? Our responses in this dossier.

What is the use of a fixation peg?

The fixing plug slides into a support so as to hold a screw in place in the hole formed. It can be installed in a wall or ceiling as needed. Invisible from the outside, it is driven into the wall to allow the screw to be securely held and to avoid any risk of tearing, twisting or shearing.

To secure the grip, there are several fixing technologies. Indeed, some anchors are expanding and open in the support wall, others move apart, nail or screw. There are also anchors with tilting or spring technology for better deployment in the dug hole, others which operate a locking by forming a knot, and finally still others which must be chemically sealed in the wall.

Thus, as we have seen, the ankle makes it possible to secure the fixing of any object in a wall or a ceiling. However, for this security to be total, it is essential to install the correct anchor, the one that will be both suitable for the support and the load of the object to be fixed.

Indeed, placing an unsuitable ankle can have more or less disastrous consequences. On the one hand, the object fixed by it can quite simply come loose and fall. If some do break or get damaged, which is unfortunate, the risk of hurting someone is far from zero. In addition, the fall of the object can cause significant damage, with a part of the wall or ceiling being torn off or even damage to the floor or the furniture on which it falls. As a result, always make sure you invest in purchasing the right anchors for your need. Never leave this choice to chance, at the risk of greatly regretting it.

Which anchor to choose for fixing in a hollow concrete block?

The hollow concrete block is a particular support, but widely used for the realization of false ceilings, dividing partitions or garage or workshop walls. This support is naturally not very resistant to heavy loads, which is why it is essential to use suitable anchors.

To fix an object in a hollow concrete block, you can use several fixing dowels depending on the maximum load to be hung.

  • For a load weighing less than 10 kg: the crampon ankle.
  • For a load weighing less than 20 kg: the plastic anchor with an expansion system.
  • For a load weighing less than 30 kg: the nylon ankle with a deformation system.
  • For a load weighing less than 50 kg: the metal expansion anchor.
  • For a load weighing less than 100 kg: the two-component deformation anchor.
  • For a load weighing less than 130 kg: the form-locking ankle.
  • For a load weighing less than 200 kg: the metal anchor with great expansion.

You now know the types of anchors to choose according to the weight of your load. However, if we had to recommend you models suitable for heavy and light loads without distinction in a hollow block, it would be the following three:

These models are indeed the most recommended for drilling a hollow concrete block and allowing secure fixing. The drill or the hammer drill are not recommended for drilling in hollow concrete blocks, because the risk of enlarging the hole and making the plug totally ineffective is too great. As a result, even with the right tool, falls and accidents are possible. Therefore prefer these three models which can be installed with a concrete drill bit and at minimum speed to avoid any risk.

Finally, to further secure a very heavy load, you can also use a chemical sealing bed for hollow concrete blocks.