Hydraulic doors safety

Can you replace that with B7 threaded rod? It's not as corrosion resistant as SS but it's stronger.

Burrrrrrrrr, I'm going to have bad dreams thinking about this tonight.
I am so glad nobody was hurt.
A good thread and great reminder; Don't trust or stand under any articulating devices.
Hatches, davits, moving decks and platforms, ,, when things do happen, it can hurt and more.

Hard to say for certain but it looks like that bolt failed due to bending/shearing stresses. Bolts and threaded rods are intended for axial loads only, this is why pre-tension torque measurements are so important in bolted connections.
Was the pin through the jaws free to rotate?

I wonder if other Lazera owners have been here? Is there a Laz group or forum?
If it is of future concern (after to operate repairs) I'd tap on an engineer to improve this hardware..

Is there two or just one of these operating the hatch?

Ah, that's what it looks like.
My aged brain cells had it mostly pictured in my mind.
A picture helps ole crappers like me.

I agree. Looks like the pin was seized or partially pulled out.

For some time now, I have been holding my key-strokes back but Now I have to let it loose.
Please don't take this negative.
I don't think that bolt/rod just suddenly failed.

It probably would not be in my list of items to check regularly and probably not in your regularly inspection item list either.
But this may be a strong lesson to keep things like this on everybody's check list from now on.
Including like items like side doors, hatches and transom doors.
Not binding, over stressed, deflection of components, lack of lubrication or worn bushings.

Heck, a gust of wind last year could of started this failure.
Big wild hinges we are complacent with.
Your experience is a good reminder and lesson; keep an eye on these and other assemblies.

So glad no body was hurt.

Also, Put somebody in that garage with a flashlight, Ensure that bolt/rod/assembly is not under deflection when closed.

Good lesson for us all.

Understood well, Brother..

In my post #6 above, I would hope some way to get a message out to other Lazera operators sadly not on YF.
To all other Nautical Structure customers, I hope your alert here, gets out.

Further, not just Nautical Structure assemblies, any mechanical assembly operating with bodies close by.

I'm not an expert in marine hydraulics, but I've been around construction equipment for 35 years. Putting yourself under an assembly that is supported only by a single hydraulic ram is a no-no for the most part. I'm thinking dump truck beds and the like. They all include a mechanical (stiff leg) prop for maintenance purposes.