Soundproof barrier feature: 

1.Effective noise barriers typically reduce noise levels by 5 to 10 decibels (dB), cutting the loudness of traffic noise by as much as one half.

For example, a barrier which achieves a 10-15dB reduction can reduce the sound level of a typical tractor trailer pass-by to that of an automobile.

Wind pressure vaiue(kN/m2)	Height	Vertical force N (kN)	Horizontal force  Sva (kN)	Mbending moment M (kN*m)
w.≤0.45	2.0	1.70	9.1	9.4
	2.5	2.64	11.4	14.7
	3.0	3.30	13.7	21.1
	3.5	4.28	16.0	28.6
	4.0	4.92	18.3	37.3
0.45<w.≤0.75	2.0	1.85	15.2	15.8
	2.5	2.90	19.0	24.5
	3.0	3.62	22.8	35.1
	3.5	4.32	26.7	47.7
	4.0	5.40	3.0.5