April 12th, 2018, 05:45 PM


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You're forgetting about the end fittings. As there is no break in the center of a 40 ft. shipping container, it will hold more than two 20 ft. shipping containers laid end to end.
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April 12th, 2018, 05:51 PM

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Yea, sorry about the math. What's a couple orders of magnitude between friends.
Reminds me of my Geometry final in high school. Now, mind, I was GOOD at geometry. Took to it like a dog to water.
But on the final, I just could not figure out this one problem. Spent a solid 10 minutes on it.
I gave up and turned it in, but I asked the teacher about it.
He says, "Well, first off a triangle has 180 degrees"
"Stop! That's it, that was my problem."
For whatever crazed fever dream reason, I was convinced, at least for that problem, that a triangle has 190 degrees. No wonder it never worked.

April 12th, 2018, 06:15 PM


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Wikipedia's "Twentyfoot equivalent unit" page gives 33.2 cu m for a 20 ft TEU and 67 cu m for a 40 ft TEU, which jives with none of the math above:
Length  Width  Height  Volume  TEU  20 ft (6.1 m)  8 ft (2.44 m)  8 ft 6 in (2.59 m)  1,172 cu ft (33.2 m3)  1  40 ft (12.2 m)  8 ft (2.44 m)  8 ft 6 in (2.59 m)  2,377 cu ft (67 m3)  2 
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Last edited by Adam Dray; April 12th, 2018 at 10:59 PM..

April 12th, 2018, 08:31 PM

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Quote:
Originally Posted by aramis
Look up TEU (Twenty Foot Equivalent Unit)
A "standard" shipping container is 8'6" x 8' x Length.
A "high cube" is 9' 6" x 8' x length.
1 TEU is a maximum of 20' high cube, for 9.5 x 8 x 20 feet = 1520 cu ft, with a 53000 lb limit, for which 5050 is the tare weight.
So, in metric: 43.04 cubic meters, 24 tonnes mass, 2.29 tonnes tare.
Its a mass/volume combined value.
1TEU is right about 3 Td by volume, and using the TNE mass limit of 10 tonnes per Td, it's less dense than the Td.
A 40' is 6 td.

I'd done the math years ago when I did my IMTU container rules. IMTU containers are bigger then their terrestrial equivalents and are sized for 5 and 10 tons.
Among other things, I'm figuring most commercial transport is not limited to current Terran roads, and followon colonies will size their space bays, railroads, water ships and roads to the larger container standard.
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April 12th, 2018, 09:32 PM


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Quote:
Originally Posted by kilemall
I'd done the math years ago when I did my IMTU container rules. IMTU containers are bigger then their terrestrial equivalents and are sized for 5 and 10 tons.
Among other things, I'm figuring most commercial transport is not limited to current Terran roads, and followon colonies will size their space bays, railroads, water ships and roads to the larger container standard.

It's usually best to go with the standard, fewer problems that way.
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April 12th, 2018, 10:40 PM

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Quote:
Originally Posted by kilemall
I was going to suggest Timerover's method of 1 dton per worker.
So then the question is how do you determine how many workers?
Without knowing GT's nuances, may I suggest the following
During wartime 1% of population.
Peacetime . 25% of population.
IND or GT equivalent x2.
NonIND or GT equivalent /4.

This is too stupid much for those 90 billion pop IND planets 1.8 billion tons per year wartime/ 225 million peacetime strains even the most incredulous numbers for big ship/big fleet universes.
TL should be an efficiency multiplier too.
Scales down nicely for smaller A and B starports, and nicely explains those 12month plus build times out on the frontier for small ships.
Would also be interesting to determine repair capacity and rates by population, that limits the amount of new builds that can be done.
Need a formula for the bigger pop planets that doesn't create a monster.
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April 13th, 2018, 07:23 PM


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Quote:
Originally Posted by kilemall
I'd done the math years ago when I did my IMTU container rules. IMTU containers are bigger then their terrestrial equivalents and are sized for 5 and 10 tons.
Among other things, I'm figuring most commercial transport is not limited to current Terran roads, and followon colonies will size their space bays, railroads, water ships and roads to the larger container standard.

OTU uses 4 Td  see TTA p 133. Reference is made to similar in text in other locations.
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April 13th, 2018, 09:42 PM

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Hmmm, more useful for me, stuck in CT, to use 5ton and 10ton for the shipping lots. The OTU can do what it wants.
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