I have a building with 4.5" concrete over 2" metal decking with a 5'x4' hole cut in it in order to bring up elevator machines. They want this filled in a repaired once the elevator mod is completed. I'm looking for examples or ideas on patching a hole this size.
I figured I could use a slightly...
It's not the car platform, it's a working platform either in the pit, or at the top of the hoistway to service the sheaves. It's directly attached to the building and ASME prescribes required loading and safety factor.
Does that mean I just ignore the safety factor of 5 and use solely AISC steel design? The ANSI code prescribes loads as well. So for the ANSI ladder code, it says use a 250 lb point load on a ladder rung and use a safety factor of 5. Instead do I use a 1.6 live load combination for that and the...
ASME A17.1 Elevator Code is where the definition of safety factor is from. It's an older code (slow to update) and based on ASD. When designing working platforms it prescribes point loads and area loads and then simply states to use a safety factor of 5. I've always just used the steel manual...
If the definition in a code of "factor of safety" is thus:
the ratio of the ultimate strength to the working stress of a member under maximum static loading...
Would I assume this would be using ultimate stress (Fu) in determining the maximum allowable stress? There are many places where a...
