pipe penetration to steel tube

[Sunny19]

Hi everyone, I received a question from job site for drilling a 3" hole in a 6" wide tube steel header; it is pretty close (2') to the support. can I have them doing it without reinforcing the section? as it doesn't take much load?

 

[dhengr]

Sunny19:
What is the shear and what is the shear stress with and without the hole? Make sure they don’t field burn a 5" hole to be sure they have a 3" hole. It would be pretty easy to shop drill a couple 5" x 12" x .5" pls. and weld them in place as both reinforcements and drilling templates.

 

[Sunny19]

thanks dhengr, good point about the steel coupler, should I get them to paddle weld as well?
this pipe is perpendicular to the header so shear not an issue, they want to drill a hole in the flange,

 

[racookpe1978]

show the assumed sketch of the hole and penetration.