Table 2 Characteristics of the greenhouse frame materials.

From: Effect of single tube sections on the structural safety of Chinese solar greenhouse skeletons

Serial number

1

2

3

4

5

6

Main beam size/mm

25 × 40 × 2

25 × 45 × 2

25 × 50 × 2

30 × 60 × 2

30 × 65 × 2

30 × 70 × 2

Serial number

7

8

9

10

11

12

Main beam size/mm

30 × 75 × 2

30 × 80 × 2

30 × 85 × 2

30 × 90 × 2

30 × 95 × 2

30 × 100 × 2

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