(2 / 2) m, width of road

(2 / 2) m, width of road

Let the road width be XM
（32-2x）（22-x）=6×105
x1=1
X2 = 38 (shed)
So the road is one meter wide

Planning road width of residential area
What is the minimum width for two parallel cars? 5m, 5.5m or 6m?
In addition, what is the minimum width of fire passage?
How far can a 6-storey house be from the fire passage at most?

The speed of urban road is 30km / h, and the width of each lane needs 3.5. The area level road can be slightly reduced, but it should be possible for two vehicles to run in parallel for 6m. The minimum width of fire passage is 4m, and the 6-storey residential buildings are 1.5 to 3m away from the fire passage

Design and build a road, the cross section of the subgrade is trapezoidal ABCD, as shown in the figure (unit: m). Set the height of the subgrade as h, and the slope angles on both sides as α and β, known as H = 2, α = 45 °, Tan β = 12, CD = 10. (1) calculate the width of AB at the base of the road; (2) how much earthwork is required to build such a subgrade 1000 m?

(1) So AB = AE + EF + BF = AE + CD + BF = 2 + 10 + 4 = 16. (2) s trapezoid ABCD = 12 (AB + CD) · H = 12 × (10 + 16) × 2 = 26. Therefore, the required earthwork is 26 × 1000 = 26000 (M3)

Why do astronauts wear spacesuits

Because the human body can't be exposed to vacuum, space suits are needed to isolate the human body from the vacuum. If the human body is exposed to vacuum, the water in the human body will immediately flow out to the vacuum. Because the air pressure of the vacuum is 0, there is air pressure in the human body. If the air pressure is unbalanced, everything will be thrown into the vacuum, and the lungs and blood vessels will soon burst. Moreover, the temperature in the universe is very low, Need space suit to maintain body temperature
So if you are in the space station, it is not necessary for astronauts to wear spacesuits. But generally, spacesuits should be worn when the spaceship takes off and lands, because it is dangerous in this period. In case of problems in the sealing of the spaceship, there are spacesuits that can be supported. In addition, when the spaceship takes off and lands, because of the high speed, the gravity acceleration of the human body is very large, spacesuits can help to resist pressure

Is the formwork area calculated for the side formwork of stair step, step board and platform beam

The projection area is calculated according to the contract list and quota

What are the reasons for astronauts to wear space suits?
Is it "high vacuum" or "strong secondary shot"?

Look at the function of the spacesuit, and you'll see
According to the range of activities and space missions of astronauts, the spacesuit should meet the following conditions: (1) it can make the human body in space in a pressurized state; (2) it can provide oxygen necessary for the safety of astronauts, eliminate carbon dioxide, and control temperature and humidity; (3) it can make astronauts have various activities in space, And it can reduce the fatigue of astronauts to the minimum; (4) it is convenient to wear and take off; (5) it has the ability to protect space radiation; (6) it can withstand the impact of meteor; (7) it has the ability to deal with space accidents

Stair stepping algorithm
Given that the height is 1 meter and the slope length is 2.6 meters, make a stair and calculate the step algorithm?

Height of 1 meter: see how many ladders you are going to make. Divide 1 meter by the number of ladders to get the height of each ladder
If you do 5 steps ladder, then each ladder height 1 meter divided by 5 = 20 cm
The length of the slope is 2.6m
If the length of each step is about 4.5 meters, then it is calculated as the same as above

What happens when astronauts go out of the warehouse without wearing space suits?
Cai Cai: why do astronauts wear such heavy spacesuits? Is space a vacuum or something else? What happens if astronauts only wear ordinary clothes and take an oxygen bottle out of the warehouse?

Look at the function of the spacesuit, and you'll see
According to the range of activities and space missions of astronauts, the spacesuit should meet the following conditions: (1) it can make the human body in space in a pressurized state; (2) it can provide oxygen necessary for the safety of astronauts, eliminate carbon dioxide, and control temperature and humidity; (3) it can make astronauts have various activities in space, And it can reduce the fatigue of astronauts to the minimum; (4) it is convenient to wear and take off; (5) it has the ability to protect space radiation; (6) it can withstand the impact of meteor; (7) it has the ability to deal with space accidents

Stair step number regulation?

The minimum number of steps is 3, and the maximum is 18. The width of the stairway depends on the number of passengers and fire requirements;
(1) the width of passenger flow per share = average shoulder width (550mm) + a small amount of lifting size (0-150MM)
(2) fire fighting requires that two people should go up and down at the same time on each staircase, and the minimum width of the staircase is 1100-1400mm;
(3) the minimum width of outdoor evacuation stairs is 800-900mm
4. Stair railings and handrails

What happens if astronauts don't wear spacesuits in space?

There is no air pressure in space. If you don't wear it, your body will feel pulled outward. The pressure of air inside your body may lead to organ rupture, especially the lung