Suncast Sutton Observatory
#1
Posted 04 July 2014 - 07:30 PM
http://www.homedepot...-Resin-Stora...
It will be delivered Monday and I will post photos as the construction commences.
Since the grass is off-limits I'm going to put in the third most desirable location on the Southern end of the pool deck. This means I will only have optimum visibility from 72 to 294 degrees plus the zenith. My plan is to buy JMI wheely bars for use during the summer months and then use the observatory in the cooler winter months. Right now I'm dealing with four very important design considerations:
-How will I keep the observatory cool? In Dallas we occasionally get temps as high as 110 degrees. My plan right now is to use a small fan with timer and possibly put a tarp over the top.
-How will I keep the roof on during a thunderstorm? I will deal with this issue when I get to building the actual roof. Right now I'm thinking of doing some clip on cords from roof to wall. I'm also going to put some sand bags around the corners of the floor for extra weight.
-Drainage. My only concern about putting a shed on the cement pool deck is that it is ever so slightly sloped South. I worry a little about a flood in heavy rain.
-Power. Given the concrete pool deck doing a trench (even a short one) for a power cable is not an option. At the same time to run the fan or even a AC unit I need 24/7 power. The good news is the chance of mowing over it is non existent. However I'm worried about the cord itself getting wet or the outside house plug getting wet.
#2
Posted 05 July 2014 - 01:21 PM
1]A solar powered fan would be neat - make that Dallas sun work! Some sheet insulation under [or over!] the roof probably essential with shade planting against the sunny walls.
2]the roof on rollers to have storm guards to stop it lifting in high winds.
3]To stop groundwater ingree across the obsy floor the obsy should ideally be both level and raised concrete slab at a minimum 2"-3" above surrounding ground. A mastic seal around the perimeter direct on the ground will fail sooner rather than later! A compromise could be loose-laid concrete paving slabs across the whole floor + mastic perimeter seal so any water ingress can drain out and away.
4]Run an overhead power cable to obsy.
Good luck with your project
#3
Posted 05 July 2014 - 01:37 PM
Your Sutton is just about identical to my Cascade with the exception of the Cascade having a window on one of the side walls. A quick look at the assembly instructions confirms that it's design is indeed exactly the same. That said, you might find THIS thread useful.
I could be wrong, but my guess is you probably have more severe weather in TX than what I experience here in NorCal. If that's true and you intend to take a similar approach to a removable roof design as I did, you probably ought to invest in some addition 'hold-downs' on the roof. One method I've though about is using toggle bolts to anchor eye bolt pairs (one pair per roof panel) in the roof and wall panels and then use a turn buckle between each pair. That might be over kill since my roof panels are held in place by nothing more than the snap tabs on the outer edge of each roof section and the plastic 'C'-clips that straddle the center roof truss and engage the inner roof section edges. That arrangement has shrugged off sustained 15 mph winds with gusts to 30+. YMMV...
In terms of cooling, I have an 8000 BTU portable AC unit on its way here. Its a single exhaust unit that I plan to vent out through the side window. I'm told dual exhaust units are more efficient, but they're also more expensive and probably more involved to install. Since I don't have the AC up and running yet, I can't comment on its effectiveness with authority, but it should work OK.
I'm also on a concrete slab so for 120V AC, I've run a heavy duty extension cord from the outdoor outlet to the 'observatory' and used something like THIS to protect it.
Hope this is helpful.
-Bert
#4
Posted 05 July 2014 - 02:48 PM
Hi Akula,
Here's the link to my suncast "roll out" observatory.
http://www.cloudynig...d=Observator...
For power, I use Harbor Freight solar panels to supply 12V DC. Inexpensive and you can set it on the concrete next to the observatory. More than enough power to run the telescope, laptop, fan, LED lights.
http://www.harborfre...tml?ccdenc=e...
for ventilation I use a 12V DC muffin fan with thermostat,
And white poly tarp from tarpsplus.com over the top for heat reflection and extra water proofing, and in your case, to help hold the roof on (if you leave it removable)
http://www.tarpsplus...hite-tarps.html
#5
Posted 06 July 2014 - 02:10 PM
The roll out portion of my plan does prevent me from putting the observatory on a 2" high pad. Perhaps I can figure out away to redirect the water around the base?
The overhead power cable seems like a good idea. Is a heavy duty extension cord safe for this purpose?
I also like the tarp approach for the reflection/extra water proofing.
#7
Posted 07 July 2014 - 10:56 PM
#8
Posted 07 July 2014 - 11:00 PM
#9
Posted 08 July 2014 - 12:01 AM
Looking at the parts list on this (they don't seem to have a manual online) I'd agree that it's not viable to remove the roof on this one. The alternative to rolling out the scope, given enough room to do so, would be to put the shed on wheels and roll it off the scope. You could still put it on a pier and move the shed around it. Not as good for wind protection, etc., and it does require twice the deck space, but you need that to roll the scope out too. I note the pool to the left, so you're limited in space. I also see a big brick wall behind your fence which means you'll have limited range of viewing from that point anyway. I was thinking you could order a second "front" to put doors on the back side as well. That would allow for a pier in the corner and then you go into the shed, open the back doors, and pull the whole thing forward, but that may not be practical. You'd probably get a better FOV with the scope to this side of the shed. The other option of course is to put a pier in front and roll the shed back to where it is now when not covering the scope, but that would put it right in the of everything.
Beo
#10
Posted 08 July 2014 - 10:38 AM
What you can't see from this photo is that the ideal place for the scope is actually on the other side of the pool so in summer I was planning to roll the scope out anyways. In winter I get about 180 degrees of sky plus the zenith from this location. What I will probably do is stay inside the shed and roll the scope right outside. That way I can use a space heater if I need to without impacting seeing.
My plan is to buy a different mount (right now I have CPC+ wedge) that is easier to reliably do a polar alignment on (CEM60) and put markers on both spots on the pool deck.
#11
Posted 08 July 2014 - 12:16 PM
You can make the job of removing the center truss much easier by leaving the horizontal brace out of it, and rather that bolting the ends of it into the side wall brackets, use clevis pins to fix the ends in the brackets.
If you do this, lifting the truss off the ridge beam is easily done from a step stool after pulling the pins, and at least in my experience, there's no real sacrifice of structural rigidity.
The other option I considered was to cut a slot in the floor wide enough to accommodate my pier, the mount the whole structure on a frame made of 2X4's with casters attached at the corners to make the whole shed a roll-off affair. I ended up rejecting that idea because I didn't think the floor was stiff enough for that alternative to work reliably. and it would have made weather proofing around the bottom of the shed difficult.
#12
Posted 08 July 2014 - 08:26 PM
#13
Posted 08 July 2014 - 10:40 PM
Sorry to hear your experience with the Rubbermaid shed was so frustrating.
I've got 2 different Suncast sheds (one as an observatory while the other one has stored gardening tools well for many years now) and they both performed their respective tasks well to date.
#14
Posted 09 July 2014 - 01:39 PM
http://www.cloudynig...6548176/page...
#15
Posted 09 July 2014 - 10:47 PM
The rest of the assembly went well and I concur with bseltzer that removing the horizontal joint improves the removability of the truss. My left door has a bit too much plastic on one of the hinges and bottom of door and consequently doesn't close well. This should easy to fix. I did acquire 4 60 pound sandbags for all of $12 and place one in each corner because the Home Depot garden guy noted they had a couple of sheds roll over because they weren't full of items.
Finally the last challenge is how I'm going to create a hole for the power plug and possibly ac vent. The challenge with the power plug is that the head is so much bigger then the cord itself.
#16
Posted 11 July 2014 - 07:24 AM
Finally the last challenge is how I'm going to create a hole for the power plug and possibly ac vent. The challenge with the power plug is that the head is so much bigger then the cord itself.
You could perhaps mount a 3-way adapter to the inside of the shed with some straps, with the prongs sticking out to the outside, and just plug your cord on to it when in use.
#17
Posted 11 July 2014 - 11:54 AM
http://www.homedepot...-Replacement...
#19
Posted 13 July 2014 - 12:31 AM
In order to get the electrical cord through I ended up drilling with a 1.5" paddle bit. Then I'm using several coats of silicon sealant around the cord itself. I also installed a extra duty electric socket protector (see photo above). Inside the shed the cord connects to a power strip and then a automatic light timer. The timer is set to turn a small fan on to run between about 11am and 9pm.
#20
Posted 13 July 2014 - 04:08 PM
One thing you'll find if/when you do look for one is that the reviews on these things run hot and cold (pun NOT intended). Of the 50 or so consumer reviews I saw on this unit about 50% were 4 stars or better about 15% were 3 stars, and all the rest were 1 star. Methinks a lot of people make unreasonable demands on portable AC units because the same was true of all the other units I looked regardless of price. Speaking of price, the KoldFront was very reasonably compared to other 8000BTU single exhaust units I looked at.
#21
Posted 16 July 2014 - 09:51 PM
#22
Posted 17 July 2014 - 11:39 AM
With a small floor fan in the shed to circulate the air, I've been able to keep the interior of the shed right around 80 to 85° during the recent bout of triple digit daytime highs out here. I suspect throwing a white tarp over the shed as others have suggested would lower the temp even more.