I beam strength for hoist.

[qmdv]

I am planning on having a free standing metal building erected with post and beams on 20 foot spacing. If I hang an I or H beam from with a trolly and hoist from these beams, where can I find out how much weight can be lifted from the center. I would have the main beams engineered for this. Looking for a chart.

 

[tarmy]

Get an engineer...they will help you avoid killing yourself if you plan to be under something...

You need to consider live loads, beam connection points, deflection, the hoist itself...guessing is not a good idea.

 

[matt_i]

This is good advice above. Figure out how much you intend to lift and the design will not include the I-beam itself for the building loads plus the hoist load and put an appropriate structure underneath it and beside it so it won't fall over under load or when the load is trolleyed.

 

[GMCGarage]

I am planning on having a free standing metal building erected with post and beams on 20 foot spacing. If I hang an I or H beam from with a trolly and hoist from these beams, where can I find out how much weight can be lifted from the center. I would have the main beams engineered for this. Looking for a chart.

Have the building designer include that with their design. You have to also make sure the building can hold what you are lifting. That sort of span it will be deflection controlled, so its going to be a good size beam unless you only want 500 or 1000 lbs capacity.

 

[sberry]

I have it saved somewhere but should be easy to find a chart for the beam, it's very common.

 

[GMCGarage]

can you give us the load you want to lift? Also can you give us the size of your building beams and how they are braced?
Thanks

 

[My Old Tools]

Dynamic loads are different than static loads. My beam is sized for 1 ton at the mid point with at least a 50% margin. Side stiffeners help keep the beam from deflecting sideways and rolling over. It works great but it needs to be engineered.

 

[Farmall450]

Dynamic loads are different than static loads. My beam is sized for 1 ton at the mid point with at least a 50% margin. Side stiffeners help keep the beam from deflecting sideways and rolling over. It works great but it needs to be engineered.

Ditto