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OfflineRoamingBird
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Registered: 09/05/19
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Last seen: 6 months, 10 days
Size for SAB and holes in the lid?
    #26804728 - 07/05/20 07:11 AM (3 years, 6 months ago)

I've been looking for fitting boxes to build a SAB.

The common sizes are
80 liter (70q) with of WxHxD: 380mm x 470mm x 570mm (15.0" x 18.5" x 22.4")
and
140 liter (123q) with WxHxD of 580mm x 410mm x 775mm (22.8" x 16.1" x 30.5")

Although 'D' would be the long side to use as the front with the holes ...

I've read bigger is better (air moving slower) and the 140 liter one should probably feel more comfortable. Although I think the 580mm as the depth is overkill? To reach so far back you have to put your elbow into the SAB. Or push the finished stuff back there.

So I thought maybe I shouldn't flip it upside down, but lay it on the side and put the holes into the lid (which is clear and flat too)? Then the SAB would be pretty high, but at least that's nice for the big bags. Also I wouldn't destroy the box (as some users recommend in this forum) and it can be still used as a box.

Of course it raises the question if the lid is tight enough that no contaminants float through the crack or rather if they are so mobile that they weave through it, since it's not a straight path. But I guess you could temporary seal it with tape or just put something on top of it? Or maybe even put some sort of barrier/proofing in the recess of the lid?


Basically it comes down to these two points:

1) With the given dimensions of the 140 liter box - which one should be the height and which one the depth? Or does it not matter / is it a matter of taste/the use case?

2) Is using the lid as the front and making the holes into there a good idea or practical?


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Offlineredhandmat
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Registered: 05/09/19
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Re: Size for SAB and holes in the lid? [Re: RoamingBird]
    #26804793 - 07/05/20 08:05 AM (3 years, 6 months ago)

Quote:

RoamingBird said:
1) With the given dimensions of the 140 liter box - which one should be the height and which one the depth? Or does it not matter / is it a matter of taste/the use case?





I think comfort is most important after you achieve the minimum size of fitting all the stuff you need in there and have room to move your arms, obviously too big will just be detrimental as you may not be able to reach all the way in there.

Personally I use this and it works like a charm without issue:


I tape a box lid in front, stick my arms in the empty sides and do everything in there. 0 contams so far. I just wipe it down with water and soap (iso if I want to overkill), put a clean towel on bottom, think through my movements before doing anything, and then go about my business. I have enough room to do agar work, agar to grain, grain to grain. And dont need to have an extra bin laying around. This is what you need to keep in mind: enough room to go about doing your business. Smaller spaces make for instance G2G a bit difficult.

Quote:

RoamingBird said:
2) Is using the lid as the front and making the holes into there a good idea or practical?




Thats fine. But I would consider if the surface that now will be the bottom is level. Pouring agar for instance is not fun if all your plates will have a tilted surface when they cool down. But IMO if you get enough room in there this way and you can level the box somehow (shouldnt be difficult), I dont see the problem :smile: Just do what makes you comfortable.

Also lastly, you shouldnt worry about small spaces through which air can come through etc, I work with big ass holes for my arms and as long as its a clean environment and your hand movement is through through you should be fine. Think in terms of violent air currents, as long as you are still and dont hover your hands over clean stuff you should be alright.


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OfflineA.k.aM
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Re: Size for SAB and holes in the lid? [Re: redhandmat]
    #26804817 - 07/05/20 08:33 AM (3 years, 6 months ago)

If you lay it on the side it’ll probably rock a lot unless you find a totally flat tub, most are tapered.


--------------------
LAGM2020


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OfflineRoamingBird
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Registered: 09/05/19
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Last seen: 6 months, 10 days
Re: Size for SAB and holes in the lid? [Re: A.k.a]
    #26806126 - 07/06/20 02:00 AM (3 years, 6 months ago)

Quote:

redhandmat said:
I think comfort is most important after you achieve the minimum size of fitting all the stuff you need in there and have room to move your arms, obviously too big will just be detrimental as you may not be able to reach all the way in there.

Personally I use this and it works like a charm without issue:


I tape a box lid in front, stick my arms in the empty sides and do everything in there. 0 contams so far. I just wipe it down with water and soap (iso if I want to overkill), put a clean towel on bottom, think through my movements before doing anything, and then go about my business. I have enough room to do agar work, agar to grain, grain to grain. And dont need to have an extra bin laying around. This is what you need to keep in mind: enough room to go about doing your business. Smaller spaces make for instance G2G a bit difficult.





So the lid is from top to bottom of one shelf, so you have on the left and on the right one whole for your arms?
What are the dimensions of your "box"?


Quote:

redhandmat said:
Also lastly, you shouldnt worry about small spaces through which air can come through etc, I work with big ass holes for my arms and as long as its a clean environment and your hand movement is through through you should be fine. Think in terms of violent air currents, as long as you are still and dont hover your hands over clean stuff you should be alright.




I'm not worried about holes on the side, but holes on the top would (greatly?) compromise how a SAB is working.


Quote:

A.k.a said:
If you lay it on the side it’ll probably rock a lot unless you find a totally flat tub, most are tapered.




Tapered shouldn't be a problem, as long as the wall itself is flat? Of course there is the problem with thick top edge sticking out, but for that I tried something with another box at home. Just place the box in such a way, that this edge isn't on top of the table, but in front of the tables edge in the air. An alternative, if you want the box to be further back on the table would be to put some board beneath it, so the edge is in the air, but hovering above the table surface.


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InvisiblebodhisattaMDiscordReddit
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Re: Size for SAB and holes in the lid? [Re: RoamingBird]
    #26806214 - 07/06/20 04:52 AM (3 years, 6 months ago)

The simple answer to all your overthinking is a SAB is a box with two arm holes. Its any size that's comfortable to work in.


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Offlineredhandmat
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Registered: 05/09/19
Posts: 463
Last seen: 2 years, 8 months
Re: Size for SAB and holes in the lid? [Re: bodhisatta]
    #26806236 - 07/06/20 05:32 AM (3 years, 6 months ago)

Quote:

bodhisatta said:
The simple answer to all your overthinking is a SAB is a box with two arm holes. Its any size that's comfortable to work in.




This.


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