Concrete screw breaks during installation

[kniv]

It's 6 x 100. Clearly stated on the head and also on the box. I use an expander instead. Here's the correct model: [link]

But that one is electro-galvanized and for indoor use!

 

[kniv]

Stupid answer possibly, but isn't it lightweight concrete screws you've got?

The ones he linked to and as it appears in the picture of the broken screw, it is concrete screws.

 

[tommib]

It looks like the mold for the concrete is an asbestos cement pipe.
I'm not hysterically afraid of asbestos myself (as some are), but it might be a good idea not to disturb the surface too much.

Exactly. Drilling is probably one of the worst things you can do there. I would be very careful with the correct respiratory protection and at least keep track of the wind direction.

Honestly, I would probably try to solve the support for the beam in another way to avoid touching that.

 

[Nicro]

It is easy to break a 6mm concrete screw if you tighten it with a ratchet handle. It is difficult to avoid lateral stress at the same time. Use an impact wrench in a cleaned-out hole for a stronger and easier installation.

 

[jonaserik]

Exactly. Drilling is probably among the worst things you can do there. I would be very careful with the correct breathing protection and at least keep track of the wind direction.

And what are you afraid of? It's just about 5 mm of eternitrör and then concrete inside. But maybe you are one of the doomsday people on the forum. Who believes that just looking at eternit is a life hazard.

 

[Alfredo]

Who believes that just looking at asbestos is life-threatening.

No one has said that. I'm not the least bit obsessed with asbestos, but I still wouldn't drill into asbestos without the right protective equipment.

 

[jonaserik]

No one has said that. I have no asbestos anxiety at all but would nevertheless not drill into eternit without the right protective equipment.

With a 5 mm eternit drum outdoors and maybe a maximum of 10 holes. You get more crap in you walking the city's streets than drilling as TS needs. Everything is relative.

 

[Alfredo]

With a 5 mm eternit pipe outdoors and maybe a maximum of 10 holes. You get more exposure by walking the city's streets than by drilling as TS needs. Everything is relative.

I also don't think there is any major risk, but I would still use a respirator and stand so that the debris doesn't blow on me.

 

[Tom Bombardil]

I'm going to screw a support beam into a concrete pier. I bought these screws after a recommendation from the building store: [link]

Dimension 6 x 100. Drilled a 6 mm hole as instructed. The screw goes in a couple of turns then becomes really difficult, and when I applied more force, it simply broke. Do I need a bigger hole, or what else could be wrong?

Drilled too shallow? Lightweight concrete is quite porous, so it's tricky that the screw breaks. Is it really lightweight concrete? If it's a hard material, use plugs or expansion screws.

 

[Alexn72]

Drilled too shallow? Lättbetong is quite porous, so it's tricky for the screw to break. Is it really lättbetong? If it's a hard material, use a plug or an expanding screw.

Lättbetong?

 

[Nickesågen]

It's 6 x 100. Clearly stated on the head and also on the box. I use expanders instead. Here's the correct model: [link]

Hi! These screws require that the holes are clean and you often need to back out the screw completely and try again, back out a little bit and try again. I use these a lot and sometimes they break. These screws are not suitable for hanging loads, use concrete anchors instead, or alternatively, plug and dowel.

 

[Nickesågen]

The screw you linked to is available in 8-10-12 mm, no 6 mm. I have no experience with these, someone with experience should comment further.
I would have used expansion bolts.

The drill should be 6 mm. However, the screw measures 10 mm on the threads...

 

[kniv]

Drilled too shallow? Lightweight concrete is quite porous so it's tricky for the screw to break. Is it really lightweight concrete? If it's a hard material, use a plug or expansion screw.

It's not lightweight concrete, where did you get that from

 

[GoGetLost]

It's not lightweight concrete, where did you get that from

The screw TS linked is for lightweight concrete. That's probably where it comes from 👍

 

[kniv]

The screw TS linked is for lightweight concrete. That's probably where it's coming from 👍

No. Neither of the two links to Beijer TS posted are lightweight concrete screws.