Copper Kettle with side studs

I need help identifying what the studs are for on the sides of this copper water kettle. There are two studs on each side, each about 3/4" in length with the end being larger than the shaft. They extend slightly downward from the kettle. The only thing I can think of is that they're used to suspend the kettle on two rods over a fire, although there's no evidence to suggest it's been used like this (soot, uneven tarnish patterns, etc.). The inside of the kettle (see picture) has been fortified to handle the studs. The mark on the bottom shows "F.A.W&C" along with a "1" under it, and an "N" under that. I can't find record of any company with that name.

The kettle itself looks very well made. The wooden handle is solid to the handle, and the handle is riveted and secure (no wobble at all) to the kettle. The kettle stands 9" high and 7" wide (8 1/2" wide including the studs). It weighs more than normal kettles of it's size (2 pounds), probably owing to the buttressing for the studs.

Any help identifying the reason for the studs, or the company, would be greatly appreciated.