Can RSJ beams be placed on top of each other

[microways85]

I have recently had RSJ's installed to prop up chimney stacks as the chimney breasts underneath were removed. The BC were informed and a structural engineer engaged. I provided the calculation and plans to the builder. I noticed that the fabricator had predrilled holes in the beams supplied . But the builder that I got to help install these did not use the predrilled holes and instead placed the beams on top of each other . Is this acceptable or would Building control flag this up. I have attached pictures and the plan from the SE. Thanks

 

[tony1851]

Usual practice is to connect an incoming beam to the web of the supporting beam by bolting through a welded end-plate or suchlike.

But this involves extra costs in fabrication, and in domestic settings with relatively low loads, what your builder has done is perfectly acceptable.

 

[jeds]

As Tony says, no problem. The only thing I might have done is add a couple of tab bolts (M8s or something) through the flanges. But there's practically no load on it, so not critical.