Problem on Loading in Simulating an Offshore Cargo Basket

Hi everyone,

I'm newbie to this forum & SWX,  and just wanted to simulate an Offshore Cargo Basket, which has been modeled using SWX-Weldment, as the following figs:

I covered the base, using a structural member (Profile: 1000x3mm).

When I wanted to apply load ( uniform Pressure ) to the above plate, a message appeared that this plate couldn't be applied by loading, because this member is a beam.

Should I choose another approach in modeling phase? (using shell-element, etc.)
Is it possible to apply load on a weldment member ?

Any suggestion will be appreciated.


P.S.: The goal is stress analyzing and optimizing the structure, and also checking if the weld beads pass or fail while loading.

SolidworksSimulation