Fan Box to Metal Rafter Question

[muk]

Is mounting this type of box to the Metal rafter with tek screw in my garage acceptable? If not what is the best way to do it? The Rafters are 12 gauge 2.25" tubing.

 

[Mr_fixit]

Can you use nuts & bolts? If not, I think you'll be fine with a tech fine thread self drilling type.

 

[muk]

If I drill all the way through the beam I could use bolts and nuts

 

[Terry D]

I would nut and bolt it instead of tech screws

 

[sparky 1971]

Bolt and nut or at least use loctite on the screws.