"Component Operating Weight" for stairs

[aaronmcdevitt]

I've searched the internet for a long time and can't find an answer:

I am wondering if I should include a portion of live load in calculating component seismic forces on an egress stair (ASCE 7-05). I know seismic forces don't usually include live load, but ASCE doesn't define "component operating weight".

Aaron

 

[Ron]

Stair loading is specific...only the live load required. Nothing else.

 

[aaronmcdevitt]

Do you have a reference?

 

[Ron]

...I should have noted that the dead load is considered also!!

 

[msquared48]

In section 12.7.2, there are only four circumstances where additional lateral load has to be included.

The situation of live load on a stair system is not one of them. Only the dead load needs to be considered here.



Mike McCann
MMC Engineering

 

[msquared48]

For the record, "component operating weight" has to do with the actual weight of any machinery.

Mike McCann
MMC Engineering