July 29, 2008 Archives

Tue Jul 29 20:02:42 MST 2008

Finishing the Basement

The basement is fitted out now and ready to move in! Now it's time for bookshelves (I found a web site that sells used library shelving), furniture (including a couple of nice recliner chairs), and computers (like the one that's feeding you this blog).

I recruited a couple of friends and we went down to the observatory to frame the interior walls of the basement, preparatory to fitting it out as a living area. Basically, there are two rooms -- a darkroom that ultimately became a bedroom, and a bath/laundry. The kitchen is on the outside wall of the bath, so most of the plumbing is inside a single wall.

After that, the builder came back one last time, to help install the shower. It required a concrete-block base with cement board on top with pads of grout for the shower-stall to sit on (the shower had to be raised because there was no plumbing inside the floor slab), and his proven expertise with block and concrete made him the right person for the job.

After almost two years of near-constant concern about the observatory, with a list of things to do seemingly every day, I confess that I let my concentration lapse when it came to the basement plumbing and electrical. I failed to do my usual job of thinking about every detail and anticipating every need. I can only plead burnout ...

As a result, I would up with a cheap, low-quality valve for the toilet -- the kind with the oval handle that requires an adjustable pliers to turn as they age, instead of a nice 1/4-turn valve. And I got 1-million-turn gate valves on the water inlet piping instead of high-quality 1/4-turn ball valves. The same kind of valves got put on the clothes washer inlets instead of the really spiffy single-lever dual valve I would have liked. Basically, instead of good stuff, I got whatever was on his truck.

And the plumber turned out to be more of a copper-tubing solderer than an actual plumber. He failed to put in a drain line for the water heater TP valve (this is the valve that pops if your water heater goes overpressure; it's a code requirement that the plumber seemed clueless about), and didn't install a drain line for the pan beneath the water heater. We had to correct these things later on; the result is pretty ugly, but it's serviceable.

Fortunately, at the last minute, I thought about putting an anti-hammer device on the water inlet line -- the plumber didn't even know what that was, so had it been up to him, there wouldn't be one. If you've ever been in a house where the cold-water line bangs when you shut off a tap, you'll know why an anti-hammer device is a good idea.

After that fiasco, somebody else did the finish plumbing. He helped me correct the problems caused by the rough-in plumber, and did a great job in finishing the plumbing professionally.

The electricians that worked on the building were a lot more professional; they did both what I asked and what needed to be done for code. The failure there was entirely my own; I needed to do a much more meticulous job figuring out where I wanted lighting, outlets, and switches. There's been a lot of retrofitting as I get things set up the way I should have done it in the first place.

One place this really affected things was in the circuit breaker panels. Since I started out with such a minimalistic idea of what I wanted, the installed panel is a lot smaller than it should have been. Ultimately, we had to install a second panel at the far end of the basement to accommodate the circuitry I wanted. So, of course, I insisted on a larger panel upstairs at the observing floor -- and naturally, it's less than half full!

Anyway, despite my ineptitude, and entirely due to the efforts of a highly-skilled local home repairman, the basement walls were finished, textured, and painted. At last, the observatory is ready for extended stays. Now if only I had some mounts and some telescopes ...

Posted by terry | Permanent Link | Categories: Historical entry

Tue Jul 29 10:31:36 MST 2008

Observing Floor

The week ending August 24th, 2001, was the last week of heavy construction at the observatory. We installed floor joists, laid plywood, and tiled the floor at the observing level of the building.

In the intervening 3 weeks since the building exterior was finished, the stairway was installed, along with a railing to prevent falling down to the basement floor 12' (3.7 meters) below. The rolloff roof proved to be particularly handy for installing the heavy metal stairway and its landing; we just rolled back the roof, picked up the items in turn with a boom crane, and lifted them over the walls and dropped them into place.

The original plan had been to install computer-room raised flooring on the observing level, but 600 square feet (55.7 square meters) of this flooring, even on the used market, was just too costly. It would have been a real pain to install around the telescope footings, anyway.

The height difference between the observing floor and the slab is 27" (68 cm); I thought this would be plenty of space for floor joists while still leaving room for me to crawl around the floor underneath the joists when necessary. But the 18' 8" (5.7 meters) span, plus the requirement to support 1000 lb (450 kg) of rolling weight when swapping telescope piers, meant that the engineered TJI joists needed to be 18" (46 cm) high. Subtracting another inch for the plywood left just an 8" (20 cm) gap between the slab and the TJIs, something I could not fit into. But there was nothing to be done about that now.

So we installed the TJIs, framing around the telescope footings with some additional support, and then laid 1-1/8" (3 cm) tongue-and-groove plywood over the top. We then tiled the floor in a gray mottled tile.

As it turned out later, the builder would be back for one more day. But otherwise, this was it -- his job was done. The only remaining tasks were finishing out the basement, with plumbing and electrical work, and some electrical work upstairs at the observing level.

Posted by terry | Permanent Link | Categories: Historical entry