"RST Engineering" wrote in message
...
A 15" medicine cabinet was designed to fit between standard 2x4 studs on 16"
centers. The blades dropped into the inter-wall space created by those 2x4s.
A quick calculation for a medicine cabinet at 5' high, 15" wide, 3.5" deep
shows a space of some 3150 cubic inches. Assuming the blades were about 1" x
2" x 0.005, this gives a blade volume of.01 cubic inches. You could drop
315,000 blades into the slot before the space filled up. If you changed blades
every other day, you had a little over 1700 years of capacity.

Ah yes Jim, but you forgot to take the firestops into consideration. They
were usually staggered at about bellybutton height, so that might cut the
capacity to something well under 1000 years. Those firestops are every old-work
electrician's nemesis. But running a wire is nothing, my old man (when he
wasn't shaving) used to fish heating ducts up through existing walls without
opening the plaster.

Actually, that was a heluva good answer Jim.

Vaughn