What is the point of plastic anchors?

How much weight can a 10 mm dowel support?

DIY krekoUse wooden plugs for concrete and brick walls. Use butterfly / wing shaped plastic plugs for drywall / plaster ceiling. Metal is better than wood and wood is better than plastic anchors / wall plugs. Plastic plugs always tend to twist and turn as they are screwed in, but wood studs always stay in position, whereas wall plugs / metal anchors are used to hold heavy loads.

WallykThe problem of the anchor not holding could be due to poor drilling technique. If the drill spins too slowly, for example, when in a low gear, or if you push against the wall too fast and/or use the wrong type of drill bit, such as a speed drill bit. These speed drills are not suitable for drilling drywall:

I searched the web for solutions, as filling the hole and re-drilling has never worked for me before, the filler didn’t adhere well enough to the dead plaster behind, and the screw plug just ended up turning, or the filler came out. (This is with polyfill type filler; I hadn’t tried epoxy).

What weight an anchor can support

The chemical anchor or chemical anchor is the most effective in the case of having to support very heavy and robust elements. In addition, it can be used on all types of surfaces, whether they are made of hollow materials, such as bricks, or solid, such as concrete, marble or stone.

It works through a chemical reaction produced by mixing the 2 components that form them: a resin and a hardener. This mixture is produced at the moment of the exit of the product, thanks to the mixing cannula it has.  When it dries, the rod or piece to be joined with the resin is practically welded.

STEP 2: It is essential that the hole is well cleaned, especially in solid materials, since a sieve is not used to contain the product. A blower pump or brush can be used for this purpose. If dust remains, the adhesion may not be correct.

If, on the other hand, you apply the chemical block on a hollow material such as bricks, you must first insert a sieve or a perforated plastic cartridge into the hole and then apply the product. This prevents the chemical anchor from dispersing.

How much weight an anchor bolt supports

Ground anchors with tie rods formed by steel cables or bars are capable of transmitting tensile stresses from the ground surface to a zone below it in the resistant soil. They are basically formed by head and support plate, free length and anchor length or bulb.

The drilling necessary for the execution of the anchorages is carried out with hydraulically operated drilling rigs with percussion or rotation, with continuous casing if necessary, and taking special care to record any anomaly that may occur during drilling.

The use of ground anchors, both temporary and permanent, is often a suitable technical solution with significant advantages both in terms of time and final cost of the work.

Stressing is carried out by qualified professionals, in a controlled manner, collecting data on elongation and relaxation, for the preparation of load-deformation diagrams and their subsequent analysis.

Dowel Strength

With the exception of some types of concrete screws and anchors, which have an integrated sleeve and expanding element, the expanding dowel is essential for anchoring elements on vertical and horizontal surfaces.

They are the cheapest but also the least effective. This dowel is solid and has grooved outer walls. It is the traditional dowel. Its upper collar allows it to be hammered into the wall.

Its body is divided into three sections or legs. These legs are offset from each other by 120 degrees: like the Mercedes-Benz logo, so to speak. When the screw is driven into the plug, the legs or claws open and exert friction against the brick. Personally, I only recommend this type of anchor for low load anchors. And best on a wall, never on a ceiling.

The Fischer SX dowel is the evolution of the semi-hollow double claw dowel. It may give the impression that it is a less effective expansion dowel? On the contrary: in my opinion it is one of the best expansion cue available.