Yikes. Concrete step collapse.

[Dee_the_third]

Tenant texted me about the back door steps- the tread has totally collapsed! No one hurt, thankfully.

Seems like the steps are the prefab type, and hollow inside. I’m scratching my head about how to repair this- how do I build a form when the concrete needs to be supported from underneath? Can I get a slab, sledgehammer off the crumbling bits, and just glue a new tread on top? Or do I have to just replace the whole thing?

[ChpBstrd]

Fill it with several hundred pounds of gravel. Then pour new concrete over the top.

[Cozzmo]

Oddly built set of steps you have there.
Usually these are either wood, or have a thick concrete slab.
Your steps are built of a thin and unstable form of plaster or mortar that have withstood the test of time up until now.
I think this is a total remove and rebuild deal.

[uniwelder]

Oddly built set of steps you have there.
Usually these are either wood, or have a thick concrete slab.
Your steps are built of a thin and unstable form of plaster or mortar that have withstood the test of time up until now.
I think this is a total remove and rebuild deal.

These are actually very common for trailer homes.  They're precast and fiber reinforced.  I think they might usually cost a couple hundred dollars.

OP-- how did you resolve the issue?

[Dee_the_third]

Total replacement. I figured it wasn’t worth repairing when the repair would be questionable at best.

[Jon Bon]

What did that end up costing you?

I have a similar, albeit smaller issue at one of my properties.

-JB

[Dee_the_third]

The timing was weird- we were in the middle of selling it, so I gave the buyer a $300 credit so I can’t tell you how much it actually cost, sorry