Cracked beam under garage door

[ricebridge]

But you don't cast heavily rusted iron if you want it to last; if it's surface rust or less rusty damage, you clean them up and apply rust protection before casting..

Of course, but I assumed that the reader would understand that.

 

[naikon]

Okay, thank you very much for the answers. You seem to agree that it should be a threshold iron with reinforcement pins and not a regular angle iron.

In that case, does it work to drill holes in the existing concrete and stick the reinforcement in and use something like anchor mass as suggested?
That feels easier than chiseling away and recasting about a cubic meter of concrete, which I barely have the tools or knowledge for.

 

[naikon]

Hmm the threshold iron that seems to be easiest to obtain is made by Joma and looks like this https://www.velltra.se/product/troskeljarn-varmforzinkad-5x50x50x2500mm

There the reinforcement doesn't seem to be inserted at 45 degrees like in the first link, instead, it appears to be more superficial. Wonder how to cast it in the simplest way.

 

[MultiMan]

A cubic is 1000 liters of concrete. Sounds like a very exaggerated estimate to clear around the old iron and pour new there. It probably doesn't need much more than 3-5 bags, maybe 6 at 25 kg to handle it.

 

[naikon]

A cubic meter is 1000 liters of concrete. Sounds like a very exaggerated estimate to chisel away around the old iron and pour new concrete there. You probably don't need much more than 3-5 bags, maybe 6 at 25 kg to do the job.

Ah, yes, I probably overestimated. It's just that it feels a bit scary to chisel away so much concrete just to fit in the rebar. I don't have a cement mixer or a chisel hammer, although you can mix 6 bags in a bucket and rent a chisel machine.

I'm just thinking if the alternatives involve 10 times less workload but are almost as good, it feels okay on my side. I've been on sick leave for exhaustion recently, so I'm trying to save some energy where I can
For example, by drilling holes for the rebar, or casting in angle irons without reinforcement. I drive a car in about 1 time a year at most, so I don't think the stress will be that great.

But if it's chiseling and casting that are required, that's what needs to happen, just means I have to plan it well.

 

[MultiMan]

If it's once a year, you don't need any casting at all. Go to a mechanical workshop and have a 3 mm steel plate bent at the right angle and use it as a ramp when you drive in.

 

[naikon]

Okay, I made an executive decision and chopped away the threshold.
This is how it looks underneath. The current one was, after all, reinforced into the concrete.

Then it seems like it was moderately smart to cast the wooden frame down into the concrete without some kind of sill. It has rotted away about 10 cm.

Okay, but I'm still wondering if this is something I can tackle myself.
As I said, I don't have a jackhammer, and even if I rented one, I barely know what I would do with it. I would be afraid of removing too much and then not knowing how to restore it. I think I would have trouble getting the levels right and casting it correctly.

So I think I have these three options:

1. Still rent/buy a jackhammer and then go at it and hope I can restore it.

2. Cast a new threshold on the "existing template," with or without reinforcement pins. That is, cast an edge with a 90-degree angle, and make it about 5mm "inward" to place the threshold. Attach with mortar/glue/anchor compound or directly on the concrete when it's fresh?

3. Hire a mason? I mean, if a jackhammer costs around 3000 SEK and then I spend countless hours scratching my head, maybe it's better to admit defeat?

 

[ricebridge]

Does there need to be a strip there then? You wrote earlier that you would redo it, what are your thoughts on that?

 

[Plupp 405730]

It's not that hard to chisel, rent a good chisel machine and you'll chisel it out in an hour or so, it's not like you'll destroy everything if you chisel with care.
But don't rent a machine until you have the new iron so you see that it fits and thereby don't need to rent again..
Then you cast with, for example, expanding concrete, guessing it takes 4-6 bags depending on how much you chisel out..

 

[naikon]

Does there have to be a strip there then? You mentioned earlier that you would redo, what are your thoughts on that?

Hmm which post are you referring to?
As for whether a strip needs to be there or not... well, no idea. I'm not a construction engineer by any stretch haha. But it probably protects against rain getting in? And the gate hooks into a hole in the threshold.

It's not so hard to chisel, rent a good chisel market so you can chisel it out in an hour or so; it's not like you'll destroy everything if you chisel with understanding.
But don't rent a machine until you have the new iron so you can see it fits and don't need to rent it again..
Then cast with, for example, expanding concrete, guessing it takes 4-6 bags depending on how much you chisel out..

Alright. Yes, it's probably better to get it done correctly. Still feels insanely scary to break into your house haha.
It's a pity there aren't any guides, either from a Google search or on YouTube, on how to replace threshold iron. For me, originally just a computer geek, it's hard to imagine all the steps in my head when I've never done it.