Use 1 stud and a wall anchor on the other end.
14 studs
It is a standard construction measurement. Most homes have studs at 16 inch intervals.
1/2 inch
Studs are typically on 16 inch centers.
12 boxes, if you do not stack the boxes.
32 of them.
16" on center stud walls are stronger than 24 inch on center walls.
It requires a 1 11/16 inch socket.It requires a 1 11/16 inch socket.
2 foot by 3 foot means its just two dimensions. because you said shelf i am a bit confused. when you say shelf i think of something coming off the ground having a third dimension. a 12 inch by 12 inch box means the volume of the box is 1 foot by 1 foot by 1 foot. your shelf is 2 foot wide and 3 feet high... how deep is it? telling the depth will let someone know how many rows they are allowed to put but if your shelf is two-dimensional... which doesnt sound correct... you can put 6 boxes in that shelf.
Bent wheel studs!! No it is not safe to drive. Now way would I drive this vehicle until I replaced the bent studs.
If it is a safe designed to go in a wall, it should fit between the studs and have mounting holes in the sides. Just screw through the holes into the studs on each side.
Studs are normally on 16 inch centerlines, so, with 16 feet being 192 inches, you would need 12 plus 1 (for the starting stud) plus 2 (for the top and bottom plates) per wall. That is 15 studs per wall. Multiply that by 4 and you get 60 studs for the room. This doing not count framing for doors and windows, nor does it count studs for the floor and ceiling. If you get 16 foot studs, you can use 8 for the caps, leaving you needing 52 studs that are 8 foot long, so you would need 26 16 foot studs to make the 52 8 foot studs. The total required studs, then, is 34 16 foot studs.