Big difference. One is a solid iron beam the other is thin metal tube. More on reddit.com

Goodview Metals out near saltsburg . Real nice knowledgeable folks . Had a 6k sq foot buildings material on site in less then a week . https://goodviewmetals.com/ More on reddit.com

If your game is a bit laggy, sometimes a Stone Button doesn't power the Iron Door long enough. Try swapping it for a Wooden Button (any wood) which has a longer delay before turning off. More on reddit.com

Clears throat It takes 2.25g of iron to make an airtight frame with steel, but 6g of iron to do it as plain iron. S.Frame + 2x S.Sheet = 2gCFe3 + 2x0.5gCFe3, 3gCFe3 = 2.25gFe + .75gC. I.Frames+2xI.Sheet = 4gFe + 2x1gFe, 6g Fe Something that blew my mind was padded walls being able to hide vents. Not the thin padded ones, which just leave an ugly partially visible vent grate. I generally don't bother with regular solar panels, I set aside a large flat area with stage 2 frames and put as many basic solar panels in a row as the basic cable will support when they hit maximum power and route it to a stationary battery. When I need more daily power I add another row and use the heavy cable for column that goes up to the battery. Use APCs for their intended purpose, one per room. If it's an important system, like an airlock or filtration giving them their own APC down the line can let you keep breathing and able to exit your base if your power runs out and the lights go off. Don't chain or branch from an APC to another room's APC, use a direct line from your power source to the room's APC. Make sure to include a transformer at the earliest point in that line to not burn out your cables. Lay pipes and wires before you pressurize, stage 1 frames are insanely helpful for keeping clutter down, keep wires underground, run semi-regular 'power outlet' cables up into the room so you don't have to make a mess of it to avoid depressurization. It's also nice to have passive vent -> underground pipe -> easy-access maintenance area to pump in/out from as necessary. Don't allow passive flow between air tight rooms. If you want CO2 in your hydroponics it should be run through a filter for CO2, and the rest rest returned to the same room. Alternatively only output to a centralized filtering area, send to 'pure' storage, and remix into proper mixtures for your rooms. I'd recommend filtering H2 out first so you don't end up 'enriching' it into 100% H2/O2 mix. All of this keeps 'oops now every room is on fire' moments to a minimum. Your smelting area should have a nice fragile window view of the inert and/or [near-]vacuum outdoors. It should not have a fragile view of the room adjacent to it however. If you get to the point heavy cables won't support all your rooms make another power input area on a separate power grid and divide up the rooms between the two. Color the cables so you don't burn out your wires accidently. Color pipes and wires in general, if there's 2+ systems under/near a room they should be different colors. For pipes try to keep the colors associated with a meaning, hydroponic mix, normal mix, volatiles, oxygen, to filters, coolant, etc. Holding a colored stackable in your hand and picking up more will make the grabbed items the same color. Tanks won't burst, portable ones will, tank connectors won't (I believe), pipes will, 'special' pipes won't. Tanks require a weak pipe leading to them, tank connectors don't. Theoretically you could use a tank connector as infinite gas storage, flipping the special pipe around to release the gas without losing any. Alternatively you could pump the gas into a 1x1x1 room surrounded by stage 3 frames with an active vent. You could also have a storage line that uses radiators/air conditioners to get the line as cold as possible to reduce pressure for a more legitimate solution. Despite every wiki page saying pollutant as a coolant, if you're on Mars use CO2, it's better and VERY abundant. Just pretend your an early industrial age business magnate and dump your pollutant into atmo instead. More on reddit.com