The main structure (F, D & C) is the aluminum ‘grey’ positioned on Mars surface. Encircled is an aluminum angled plate (D) of about 6 cm. width with two hinged parts ( C ) moving out to the left. This structure should be covered by rocks and soil (E) and as such pressing the aluminum structure to the direction of Mars surface. Pressure towards Mars surface is needed because the inside pressure from the direction of B is 0.8 atmosphere (bar) against a Mars pressure on the flexi glass A of only 0.01 bar.
The purposes of the aluminum structure (D & F) are to create a frame for the flexi glass windows (A) on top and to prevent these windows flying away due to the higher pressure (B) below.
Glasses (A) should be double glassed or better less breakable double flexi glassed, separating and isolating the cold Mars temperatures from the relatively hot temperatures inside ‘Jimmy’s-hut’. Mars temperatures can be minus 50 degrees Celsius where the temperature in the greenhouse Jimmy-hut structure will be around plus 15 degrees. Again I need to emphasize not only pressure but also the heat, or the lack of it, is our enemy on Mars.
The aluminum angled plate (D) is as such constructed that frame F fits in it. The aluminum structure as such is strong enough, if not even too strong, to be build on Earth. On Mars where the gravitation is 1/3 of Earth it is absolutely sufficient. However, I do have to admit that I don’t know for sure whether this roof construction supported by Mars soil is sufficient to hold the difference in pressure of a mere one bar. It is just 1 atmosphere or one bar in pressure what is the difference, but when it concerns pressures zero to one, my knowledge is not enough. All pressures from 1 to let say 100 bar I understand. That is basic knowledge in physics or mathematics. But from almost zero to one can be completely different. There some bright head needs to complete me in knowledge.
‘G’ is a rubber protection with the purpose to make the construction water- or airtight.
‘H’ is the same rubber (preferably not plastic) protection that will be hermetically glued to ‘G’. Other than what I have previously suggested may rubber with a thickness of 5 mm. be a much better and sustaining protection than plastic sheet. Plastic sheet is much less flexible. Practical for ponds that don’t need to exist much more than 10 to 15 years, but certainly unwarranted for sustainable achievements.
This roof structure of aluminum and flexi glass have to be brought from Earth. Only slightly more volume is needed for the rubber sheets covering the below Mars surface dug out (excavation) where trees or whatever will grow. These additional rubber rolled-up sheets don’t have the volume that may create problems in transportation. The volume a 10 by 30 meters Jimmy-hut may take, won’t be more than 20 mtr2 with a weight of less than three tons. That for good living conditions on a new planet is not a price too high.
To come for those who like: Detailed technical drawings and other specific knowhow.
Next story however: Livestock (and the importance of that).