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Obsy building started ! (and now complete!)


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Some specs about the pier for those who wonder

Type Roemheld shop-floor 8915-04-50-E

Material : aluminum column and plates

Weight : 21 Kg

Baseplate : 225mm square by 15mm

Top-plate : 170mm square by 15mm

Column : base 150mm square, 135mm square for the extending part

Height retracted : 720mm

Height extended fully : 1220mm



Edited by Miguel1983
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  • 2 weeks later...
  • 2 weeks later...


today i received an adaptor plate i've ordered to specification to connect the Skywatcher tripod extension to my pier.

The tripod extension is bolted on the plate from the underside of the thick steel plate with one M12 bolt in the black tripod adaptor that is included with the Skywatcher extension, i've just turned it around so the flat side is down towards the plate.





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I had considered the roll off roof design for an observatory too. But I thought I would lose too much sky due to the height of the walls. I tried to work out a way of taking more height out of the walls, with some sort of cam system, but it all became too complicated.

The lifting pier would solve that in one easy go.

Hopefully, it is rigid enough to support the scope and mount.

Enjoying the thread


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This design is a proven one and, i think, works very well for dedicated observatory structures that are limited in size.

In my case however the all in one concept (carport - garden storage - bicycle storage and observatory) of my project really makes the structure to big for this kind of roll off system.

So i was left with the option of a flat roll of section, also a plus, standing in the garden you almost can't see the roll off, so very discrete. 

At first my idea was to have the telescope, when in the parked horizontal position, as close to the roll off roof as possible, so when in use it would raise above the roof.

This would work fine i guess, but it still would rule out the objects witch are lower in the sky, also a fixed position that close to the roof would mean that i might be limited in future telescope or mount upgrades.

So i ended up looking at a lifting pier, with the 50cm travel, i hope few limitations are left over.

*edit* Gina, loving your location, what number on the Bortle scale is that, i'm at 5 sadly.

Edited by Miguel1983
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A little better - 4.  It used to be 3 a few years ago but I guess building in the surrounding towns and villages together with the associated street lights has added to light pollution.

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22 hours ago, Gina said:

A little better - 4.  It used to be 3 a few years ago but I guess building in the surrounding towns and villages together with the associated street lights has added to light pollution.

i guess one really has to live in the dessert to get perfect conditions 🙄

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Yesterday i started with the cladding on the garden side of the cargardenshedobsy (new word) also the electrician placed all the wiring that need to be in the walls or ceiling


Didn't get very far yesterday, the electrician took up some of my time and had quite some work working in the door and window, but that's done now so i can get a move on next time.


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Fruitful day today, finished all the cladding, quite happy with the results 😊



Led strip fits beautifully 




also last week my wife applied some liquid rubber as a moist barrier 



With the cladding done i can focus on the interior of the observatory.



Edited by Miguel1983
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with the exterior work behind me i'm thinking on the next step.

I've made a sketch of the telescope room with pier and i'm wondering what the right hight would be 🤔 suggestions are very welcome 👍

Note that i have i pier that can extend 50cm also the hight off the walls is 2,1  meter in the telescope room (raised floor).

For the sketch i took measurements of the pier + raising column + EQ6R-pro + SW ED80 (180cm)

As it is on the sketch, the telescope would be 30 cm above the walls in the 0-position with the pier fully extended.

The pier is in the center of the room and the roof opening is 2,5/2,5 meter.


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Today i made the formwork for the concrete pier and poured the concrete


4 dia12 bars 20 cm deep (there's a 80/80/50 cm base under this area)


concrete pier will be 30/30/115 cm


Some left over rebar from the workshop


4 x M10 for the lifting pier


Job done


Next i started on the OSB for ceiling and walls


Made sure to have two 30mm tubes going to the roof for future wiring (All Sky, weather station, Solar...)


Warm room is done


Started on the telescope room, 30% done


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10 hours ago, Bukko said:

That's a serious piece of concrete work there...

I don't think it will move anytime soon.

Looking forward to seeing the mount and scope fitted.


You and me both 😁

Every day is a step closer, i'm already very glad the exterior work is done so i can get to work on the observatory part, witch is off course the most important part of the whole building (don't tell my wife 🙈🙉🙊)

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  • Bizibilder changed the title to Obsy building started ! (and now complete!)

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