Anyone know how a 6 m long 80x80x6 mm square tube, supported at the ends with a 6 m span, will hold up if loaded with 200 kg in the middle? The self-weight is about 80 kg. The load will primarily be static (100 kg), but sometimes someone will want to walk on it (+100 kg dynamically).
The idea is to encase it with a "gypsum box" (outdoor gypsum, outdoors) which will then be plastered. Doomed to fail or not? Cracks in the plaster and such, perhaps?
The idea is to encase it with a "gypsum box" (outdoor gypsum, outdoors) which will then be plastered. Doomed to fail or not? Cracks in the plaster and such, perhaps?
There will definitely be cracks, at least if you walk on it.
Can't you go up in dimension and choose something like 160x80 (or whatever is available) upright?
Now, I haven't calculated the above case (don't have the energy to find tables and formulas) but I find it very hard to imagine it will be as rigid as desired.
/Kent
Can't you go up in dimension and choose something like 160x80 (or whatever is available) upright?
Now, I haven't calculated the above case (don't have the energy to find tables and formulas) but I find it very hard to imagine it will be as rigid as desired.
/Kent
How do you do it while maintaining strength and how should it be bent? An I-beam does not bend particularly easily.
Isn't it making things unnecessarily complicated, especially since you usually want things to be level.
If you play with dimensions, you would in this case let the triangular shape of the construction point downwards.
/Kent
Isn't it making things unnecessarily complicated, especially since you usually want things to be level.
If you play with dimensions, you would in this case let the triangular shape of the construction point downwards.
/Kent
Then it will have to be a guess... Nothing more than a pure guess.
I checked a bit and my answer is a normal I-beam that is 200 mm high.
Those who have the energy to calculate it will probably end up around there, the crux is the dynamic load when walking and jumping on the beam.
As I said, a guess that I think is within the tolerance +/- 40
Let someone who really can calculate it.
/Kent
I checked a bit and my answer is a normal I-beam that is 200 mm high.
Those who have the energy to calculate it will probably end up around there, the crux is the dynamic load when walking and jumping on the beam.
As I said, a guess that I think is within the tolerance +/- 40
Let someone who really can calculate it.
/Kent
If the load "only" is 200 kg in the middle, an IPE160 is sufficient...