Follow up to previous deck height question

[JAFARR]

I tried to find the OP, but couldn't. A while back someone posted asking about hight between decks. I think the general thought was the standard is 3 meters, but I have been working (mentally - not on paper yet) with some standard designs for MTU. If a standard shipping container is 3m, how do you get it into a hole whose hight is also 3m? Especially when you take into account that the decks will be built to a more exact standard than the container. I came up with this rationale; the cargo decks are actually a bit larger than 3m, and crew/passenger decks are a little less. After all, there aren't a lot of humans who require a deck hight of 9 feet and 10 inches. But for ease of calculation we can just use 3m and let it balance out.

 

[Icosahedron]

Who said the standard container was 3m? Today's standard is more like 2.5m. Future standards will be whatever is appropriate. If deck heights make 3m containers inappropriate, then containers won't be 3m.
There will seem to be a difference in deck height anyway, since the accommodation sections will have false ceilings and more ducting.

 

[Swiftbrook]

Who said the standard container was 3m?

GDW Supplement 7: Traders and Gunboats page 20, 1980 OOP.

There's a nice drawing on the plan of the subsidized merchant of a 3 x 3 x 6 Cargo Module (3.85 tons). In other versions of Traveller this is 4 dtons.

OP: Great questions. Never thought of that! (I'm a deckplan junkie )

-Swiftbrook

 

[Hemdian]

For what it's worth, a few years ago I worked out the sizes of freight containers IMTU and came up with this. (The pictures are just to give an idea, I realise their relative dimensions don't match the text.)

 

[Icosahedron]

Who said the standard container was 3m?

GDW Supplement 7: Traders and Gunboats page 20, 1980 OOP.

There's a nice drawing on the plan of the subsidized merchant of a 3 x 3 x 6 Cargo Module (3.85 tons). In other versions of Traveller this is 4 dtons.
-Swiftbrook

Ah, right, that'll be the same CT that lets you put a 4dT air raft in a 4dT fitted compartment...

You have 3 options:
1. Don't question the rules.
2. Invent a rationale.
3. Change things that make no sense.

My question was rhetorical. Jafarr and I are both following #3, just in opposite directions, one keeping the deck height and changing the container, the other keeping the container and changing the deck height.

 

[Supplement Four]

Anybody got a Traveller Adventure handy?

In the back, with the description of the March Harrier, the standard shipping container is presented, with diagram.

 

[far-trader]

Ah, right, that'll be the same CT that lets you put a 4dT air raft in a 4dT fitted compartment...

...you forgot "and can carry four persons plus four tons of cargo."

:smirk:

No, I don't know how one fits 5tons plus* of stuff into 4tons of vehicle

* 1ton of people, 4tons of cargo, and the air/raft itself - in the G-Carrier notes it says assume 250kg of cargo per person not carried, so again we have a mixed usage of tons, both displacement and mass, and both equal

All measures in CT are round and full, not actual. A 3m deck height is meant to include the bulkheads and so is less than 3m clear. A 3m x 3m x 3m stateroom is less than that to allow for partition walls and drop ceiling. A 4ton cargo container of 3m x 3m x 6m is actually less than 4tons (3.85 tons is iirc too big as well from when I was playing with clearances) and less than 3m x 3m x 6m to allow for its own structure and clearances within the actual hold. And so on and so on.

You can sweat the small stuff and work it all out to fit, everything nested and free of friction fitting.

Or you can ignore it and just go with...

...a 30ton Mod Cutter cargo module fits into 30tons of Mod Cutter space, which 50ton Cutter fits into a 50ton hanger aboard a ship. The 30ton cargo module can carry 30tons of cargo containers with a total of 30tons of cargo contained within.

 

[JAFARR]

Just pulled Traveller Adventure up on the CT CD. It even states that the cargo bay has 6m ceilings to allow stacking cargo containers 2 high. Some other canon deck plans also have double hight decks in the drive spaces as well.
As mentioned by Icosahedron

There will seem to be a difference in deck height anyway, since the accommodation sections will have false ceilings and more ducting.

Some sections have false ceilings included in the hight. After 8 years in the US Navy, I think it reasonable to assume that there would a lot of similarities in construction of space ships and ocean going ships. Most of the false ceilings took at most 18 inches (call it 1/2 meter) and many of them more like 12 inches ( 1/3 meter) which still leaves some extra space in the crew/ passenger areas that can go to either (1) offset the lack of clearance in the cargo area or (2) give more floor area in the living/operating spaces.

I think I will just go with calling the decks 3 meters and not bother with the extra calculations. Just like I make staterooms two tons and use the extra 2 tons for passageways and common areas. A lot less headaches that way and doesn't affect playability.

 

[alveric]

I've been trying to do some deckplans based on the following:-

http://www.io.com/~thrash/navarch.html

I don't know if that helps...

A.