Assembly: Wall mount for punching bag

Good evening everyone,
I have meanwhile tried to fasten the bracket with the supplied bolt anchors. Of the 6 bolts, unfortunately 2 could not be tightened at all, as first the masonry, and then the thread gave way.

Now I intend to install the bracket with M8 threaded rods and injection mortar. This also brings me to the next problem (?).

As can be seen in the following sketch (/ at the top of the first picture), the bracket has a slight bend. Do the webs of the bracket (with the holes for wall mounting) have to lie flush against the wall after installation, or is a (hand-tight) tightening / putting under tension sufficient? According to the mortar data sheet, the maximum torque when fastening is only 4 Nm (M8 threaded rod). The tensile load is specified in a range from 6.8 kN (C 20/25) to 42.0 kN (C 50/60).

Does anyone perhaps know an alternative heavy-duty fastening for sand-lime brick?

Please, I would appreciate help. Many, many thanks!

Read too late. These anchors are only suitable for concrete as well. You would have needed these, for example: [Eibenstock Rawl-Dübel]

Great, thank you! I think I’ve finally found someone knowledgeable. A few details are still unclear to me:

What would be the alternative with fastening using injection mortar and anchor rods?

Unfortunately, due to the removal of the original anchor bolts, the drill holes have somewhat enlarged (approx. 13mm diameter and 50mm depth). Would injection mortar possibly be suitable here as well? How else can I repair the holes to install, for example, the M8 wall anchors?

And how tight do I actually need to screw it in? Is "hand tight" sufficient, or does the bracket have to lie flush against the wall? Unfortunately, I have no way of assessing the resulting vibrations at all.

I would be very happy to receive further feedback.

Thank you very much!

The second link is the correct one. It should hold. You can also remove it again after disassembly. It would certainly also work with injection mortar. It would definitely be better if it were planned.

Thanks again! That helps me a lot. Now I'm just thinking about which would be the best solution. I have illustrated the three options again in the sketch and as a picture (see below). According to the datasheet, the method with injection mortar only allows a maximum fastening torque of 4 Nm.

For the two variants of the "Rawl wall anchors," it would be 15 Nm. Here I would have the advantage anyway that I could continue to use the existing drill holes (--> 14mm outer diameter).

With the variant with internal thread, however, I fear that I will reach the 15 Nm torque before the screw is fully screwed into the "anchor," meaning that the screw head protrudes from the wall. The bracket should lie as flat as possible... Does the bending and the resulting stress affect the torque or the tensile load? Or possibly both? Am I making a mistake in my reasoning? Hope that makes some sense :-P

Thanks again! Really great that there are such competent people here

I apologize for disregarding the forum rules, it will not happen again!

Rhineland greetings back