Mount Bell box to metal deck railing

[VirutalElectrician]

Any thoughts on how to attach a Bell box to a railing like this?

I can't seem to channel MacGyver at the moment.

 

[infinity]

Self-drilling screws.

 

[ActionDave]

I've been known to use the KO in the back of the box with a screw and a fender washer to mount bell boxes.

 

[Barbqranch]

I can't seem to channel MacGyver at the moment.

Obviously requires duct tape!

 

[tom baker]

Drill and tap for SS 1/4-20 hex head with ss fender washer

 

[winnie]

I'd try to get the carpenter to mount a suitable piece of blocking (perhaps matching the deck) to the rail, and then attach the box to that.

 

[MTW]

What is the box for, and what connects to it? That would help determine how I would mount and supply wiring to it.