concrete floor

[Ahmmed123]

I did an analysis of an extrem event of theater drum set. I end up with force of 45.75 Kips going to a concrete floor. this force have been transfered from 2X3X1/2 in steel column. I was calculating the crack in the concrete based on both bending and bearing. for bending 7.5(4000)^(1/2) * 3*4. where 3 is the column width and the 4 is the concrete thickness. what is the best way to reduce the force on the concrete? I was thinking of concrete steel bearing plate girder to spread the force??

Thank you

 

[ztengguy]

Thats a heavy drum set. not sure if a steel bearing plate girder is the best. Can you sketch up whats going on?

 

[Ahmmed123]

sure see attached. it's a free fall of 1200 lb form 50 ft hieght!

 

[ztengguy]

I would think that you would want to ask them not to drop it. What if someone is walking by it when it falls. I dont get it.

Maybe a second cable on a safety?

 

[Ahmmed123]

this is a theater set, and accidents happened before by forgetting to load one side and releas the key so it falls down. the weight is on a vertical track so it won't hit anyone. and the only concern is the floor. cables won't help cause they are not connected to anything at the other end. if you have a stage rigging handbook then you might get it.

thanks you tho