transportation and handling loads

[struct6]

Hi all,
Can some one tell me what kind of lateral load combination should I use for analyzing a structure subjected to transportation and handling loads. I saw in a sample calculation that they used the following combinations for lifting and handling loads respectively,

a. for lifting load
2g vertical

b. and for transportation loads

1. 1.5g lateral + 1g vertical,
2. 2.5g vertical load and
3. 1.0g lateral + 1g vertical.

this example does not cite from where these load combinations were obtained. Are these the right combinations or are there any other combinations ?

Thanks

 

[MiketheEngineer]

Train, car, plane, truck, Ferris wheel??

 

[struct6]

This is for a skid. Which is part of a chemical processing plant.