how to model double beam with a single beam

Dear sir,

Kindly advise how we can attach two beams with a single beam as shown in the attached drawings section 5a in staad pro.. the primary beam size is UB1016*305 AND SECONDARY TWO BEAMS ARE UC 203*203*46KG. staad file is also attached . Kindly advise this method is correct or not?

Thank you.

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4152.Structure1.std