IBC 2000 - train platform live load

[samdamon]

For determining a design live area load on an elevated, framed passenger train platform, the IBC 2000 table 1607.1 is not much help. I am thinking to treat the platform as an "exit" and use 100 psf.

For concentrated design loads there is the 300-pounds-on-4-square-inches rule normally used on stair treads and the 2000-pound-load-over 2.5 sq ft per sec 1607.4 for floors. So I will probably check both. My question is what have others used as live loading criteria in this situation?

AREMA manual was no help on these questions, it appears to defer to local codes regarding design live loads.

 

[Taro]

The table cannot cover every conceivable situation, so engineering judgment is required. I think your interpretation is a good one. The loading seems similar to an "exit" or an "assembly area lobby" or "yards and terraces, pedestrian". All are designed for 100 psf.

 

[COEngineeer]

I think you meant 3000 lbs on 4 square inches? Yeah, I think I would use 100 psf. I would probably also make my live load deflection to L/600 just to make me feel better.


How do you guys use interpret this 3000lbs point load? Do you make sure the joist can take 3000lbs if applied in the middle span (only moment), or do you check the deflection also?