Can the garage roof support a diesel engine?

[janwide]

I have a garage with a flat roof. Joists 60 x 200 mm Span approximately 4 m. Will the joist hold if I hang a 200 kg motor in the middle?

 

[Karl-E]

I would think so. Place a weight on top and you'll see if it starts to falter when you apply pressure.

 

[Tomture61]

Have a garage with a flat roof. Joists 60 x 200 mm. Span approximately 4 m. Will the joist hold if I hang a 200 kg motor in the middle?

The span of 4 m is considerable.
There are certainly some who can calculate this; I myself can only find dimensions for floor joists.
But a scenario, if the joist breaks, what happens to the car and how do you replace the timber in the truss?
Engine crane at Biltema

 

[Karl-E]

Short rule 45x95 on each side will make a huge difference.

 

[janwide]

But a scenario, if the rule fails, what happens to the car and how do you replace the timber in the truss. Engine crane at Biltema

Hence the question

 

[janwide]

A rule of thumb is 45x95 on each side will make a big difference.

That's a good tip. I am also considering reinforcing the rule with plywood on each side. Then anchor the hook with a through bolt at the top of the rule.

 

[prototypen]

Plyfa is just mediocre, every other layer doesn't contribute much.
Protte

 

[Andreas_kalmar]

In my garage, the eyelet is attached to a beam that rests on 4 rafters with a span of about 7 meters.

 

[BosseHansson]

Is the rule visible so you can insert another one next to it?

 

[prototypen]

What is the roof calculated for snow load zone? 200 kg snow is not that much.
Protte

 

[fribygg]

Likely, can't you screw a or a couple of reglar under 2-3 rafters and thereby distribute the load if you are worried?

 

[fribygg]

That's a good tip. I'm also considering reinforcing the beam with plywood on each side. Then anchoring the hook with a through-bolt at the top of the beam

Screw-glued plywood or metal on both sides will make it much stronger.

 

[Workingclasshero]

https://boxerville.se/forum/viewtopic.php?id=53317

This is how I did it.

 

[fribygg]

[link]

This is how I did it.

Smart and simple, that's how it should be done.

 

[janwide]

What is the roof designed for snow load zone? 200 kg of snow is not that much.
Protte

True. But here, 200 kg is placed on a single point. How is snow load calculated?