Re: AP1600 Down
On 11/15/2021 10:22 PM, W Hilmo wrote:
Thanks for the suggestions to build the pier now.OK, rent a trencher and dig a trench to the observatory location, and lay direct-burial Ethernet cable. Bring it out of the ground with a short length of PVC conduit and a service (weather) head. Leave plenty of cable to run inside the observatory to an Ethernet switch or wi-fi router.
My observatory is 300 feet from the house, and I control everything via Windows Pro Remote Desktop over CAT5e cable. I also buried #8 underground feeder cable in the same trench for 120V house power. A switch in the basement turns the observatory power on and off, and I send commands via Ethernet to two DLI Ethernet power switches that switch power to individual pieces of equipment.
Also, right now in our area, concrete pours are super expensive.If thePad? I definitely would not build an observatory on a concrete pad. I built both mine on 4x4 pressure-treated posts. My 10'x14'observatory has 12 of them spaced about 58" apart. Here's the plan: <http://house.mdodd.com/proj_obs_foundation.html>
You can dig holes for the foundation posts with a post hole digger or a rented power auger. We dumped 3" of crushed stone in each hole, set the post and plumbed it, then shoveled in dry concrete from an 80-pound bag. We added water, and let it soak into the dry concrete. No mixing needed, and very inexpensive.
The entire 12 foundation posts took 4-5 bags of concrete from Lowe's, and the 12" pier took 5-6, if I remember correctly.
I see absolutely no benefit to building an observatory on a concrete slab. It retains heat which radiates at night. A wood floor on posts allows air to circulate under it and up through the observatory when the roof is closed (I have gable vents and a clearance hole in the floor around the pier).