Crane for seismic load combiation

[bkal]

I would like to understand what is a common practice in the US (please note that the design I am working on is not in the US). We need to design a building supporting the crane and there are two possibilities:

1) Crane is going to be used only for a few years during installation of eqipment, and then left in parked position. During the installation, it will be used only about 5% of the time (over ~5 years). Following the installation, as mentioned, it will be parked for the rest of the life (50years).

2) Same as above, but after installation it will be removed from the building completely.

I would like to know how to introduce the crane for the seismic load combination for the design of the building,i.e.:
a) unloaded in parked position,
b) loaded at any position,
c) any other

for SL-1 and SL-2 events (as defined by IAEA).

Any help / pointers to US codes etc would be really be appreciated.

Regards,

 

[baw1]

The 7th edition of the Masschussetts Building code specifically addresses load combinations including cranes. And it is free online, if you do a search. Requirements are in chapter 16 under structural design.

 

[weab]

The building should be designed for full seismic loads. If a design earthquake occurs during construction, the building owner would likely not be satisfied with significant damage.

Only the crane dead load need be considered in calculating seismic load. Just like any other load, the crane load must be moved around to check various components. That is, load near mid span for crane beam, near column for column design, etc. That includes moving the crane trolley to one side near one of the crane beams.

I would refer you to AISC Design Guide 7 for Industrial Buildings.