Sizing, rule for lifting things with

[-PC-]

I have searched both Google and byggahus, but can't find anything reasonable
Can you help me with this?

I'm wondering how to calculate the maximum load on a beam resting on supports at both ends?

For example, I have a beam that is 45x220 and 2.5m long, how much can it support with a hanging object in the middle (worst place)?
If I wanted to lift some weights, 25kg, 250kg, 2500kg

 

[Forbo]

Check out traguiden.se, floor beam sizing, and you can get an estimate of what load it can handle... keep in mind that different joists are rated differently, K24 for structural timber.

You can probably fairly safely assume it's closer to 2500 kg rather than 250... but if you're going to hang a car from the ceiling overhead or something, you'd better check it

 

[-PC-]

Damn, what a great page, lots of interesting stuff

I was planning to lift a lathe off the trailer, unknown weight, maybe 500kg. Absolutely max 1 ton. There will be two beams, so it shouldn't be a problem. It won't be loaded in the center of the beam either.

 

[Daniel78]

Darn what a good site, lots of interesting stuff

I was planning to lift a lathe off the trailer, unknown weight, maybe 500kg. Absolutely max 1 ton.
It will be two beams, so there shouldn't be a problem. It won't be loaded in the center of the beam either.

I lifted off our boiler at about 300kg like this:
http://www.akkk.se/huset/flying/index.htm
http://www.akkk.se/huset/hole/index.htm

Can't remember if it was 45*95 or 45*120, wood is stronger than you think