Step-on steel beam angle cleat fails

[P Pap]

Hello...
Can somoeone assist please.

In pro-steel, two steel beams have been calculated where one steel beam (B02) is supported by B01 at 1.05m from one support. i.e. B01 supports the reaction of B02 (step-on beam).

B01 5.74m length
Steel beam options
UB - 305 x 165 x 40
UC - 203 x 203 x 71
RSJ - 254 x 203 x 82


B02 4.375m length
Steel beam options
UB - 305 x 165 x 40
UC - 203 x 203 x 52
RSJ - 254 x 203 x82

Factored shear stregth at support 137.9 KN

The Problem is that prosteel will not design a web cleat that will Pass.

Can anyone suggest why and also an alternative design solution for this situation.

Thanks

[Tony Bryer]

I didn't spend a lot of time on this, but can confirm that I couldn't make an angle cleat connection work between two 305x165x40 UBs. The key reason is that this is a relatively light section so there is not enough steel left in the web of the supported beam after allowing for the notches and bolt holes. A flexible end plate connection appears to work OK. Increasing the beam size would be an alternative, though probably uneconomic, answer.