by In this lesson, we will discuss which components need to be calculated on the top floor of a building.
We don’t need to start from scratch at the top level.
It’s okay to compare it with the first level or the middle level.
We’ll still compare it piece by piece, starting with the enclosure structure.
1.
The comparison between the top layer enclosure structure and the middle layer enclosure structure is very similar, both of which are components that are off the ground.
Let’s first take over the components of the middle layer enclosure structure, as shown in Figure 1.
Teacher: “Everyone, look at Figure 1 to answer.
Are the components of the middle layer enclosure structure possible to appear in the top layer enclosure structure?” Student: “It’s all possible.” Teacher: “What other components can you think of? The top layer enclosure structure has it, but the middle layer enclosure structure does not?” Student: “I can’t think of it.” Teacher: “Then we can draw a conclusion that there are 31 enclosure structural members on the top floor and 31 on the middle floor, as shown in Figure 2.” Figure 22 Teacher: “Why is the top structure of the first floor compared to the first floor, not to the middle floor?” Student: “Because the top structure of the first floor has the characteristics of the top floor, when we analyze the top structure of the first floor, we consider the situation where the first floor is the top floor.” Teacher: “That’s right, so let’s take over the components of the top structure of the first floor first, as shown in Figure 3.” Teacher: Everyone, look at Figure 3 to answer.
Which component of the top structure on the first floor does not appear? “Student:” The board hole cannot appear, because it is the top floor.
Will the board hole leak rain? “Teacher:” The board hole actually appears on the top floor.
Have you ever seen a manhole on the roof? “Student:” Yes.
“” I haven’t.
“Teacher:” Think about it, how can a board building without an elevator get on the roof Student: “I don’t know.
Figure 5 Teacher: “Let’s think about what other components will appear on the top structure of the top floor, but not on the first floor?” Student: “No,” Teacher: “Let’s make sure that the top structural components of the top floor are exactly the same as the top structural components of the first floor, which are all 9 components, as shown in Figure 6
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