> On Feb 11, 2019, at 12:24 PM, Jack Harper via cctalk <cctalk@classiccmp.org>
> wrote:
>
> At 10:16 AM 2/11/2019, Fred Cisin via cctalk wrote:
>> ...Need to bolt the rear to the floor, or something SOLID, and extend the
>> "footprint" of the front to include where the center of gravity is when
>> fully extended. And a bit more, so that setting a tool or elbow on it
>> doesn't topple it.
>
> I bolted the 19" rack with the two HP7970 drives down to a 3/4" thick plywood
> base about 36" square or so and then anchored that to the concrete floor -
> before I installed the drives.
>
> See http://frobenius.com/190203%20Tape%20Drive5.jpg for yet another exciting
> photo :)
>
>
> Best to the List -
>
> Jack in the Rocky Mountains.
Jack, this looks like a pretty good idea in the short term. But, every piece of
concrete I have ever been associated with has been off-gassing water at a slow
rate. I have stored wood face-down on concrete enough times that I should know
better, and it has always been ruined - rotted - by constant exposure to that
water off-gassing. The wood traps the water (which would normally have no
problem evaporating, because it is a very slow rate) which then rots the wood.
Now whenever I store wood flat, I put bricks or something between it and the
concrete so there is an air-gap.
Unless there is a pretty impermeable water barrier between the plywood and the
concrete, I would say that solution is not trustable for more than about 6
months of service at the outside. Even if there is, I would check pretty often
around the bolt holes, because I think the bolts penetrated the barrier and the
wood around the bolts will be rotten soon.
Comments and corrections most welcome from anyone who has more experience, of
course; YMMV and I Am Not a Carpenter…
- Mark
