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220KV 2D1 SJ1 double circuit transmission tower
This photo refers to our 220KV 2D1 SJ1 double circuit transmission tower, it is widely used in our Chinese market. Some of technical features of this tower as follow:
1 climate condition
Item |
Temperature (℃) |
Wind speed (m/s) |
Ice thickness (mm) |
Max. temperature |
40 |
0 |
0 |
Mini. temperature |
-40 |
0 |
0 |
Ice thickness |
-5 |
10 |
10 |
Basic wind speed |
-5 |
27 |
0 |
Installation condition |
-15 |
10 |
0 |
Annual temperature |
5 |
0 |
0 |
Lightning overvoltage |
15 |
10 |
0 |
Operation overvoltage |
5 |
15 |
0 |
Hot-line work |
15 |
10 |
0 |
2 tower design data
|
Tower type |
Nominal Height scope (mm) |
Nominal Height (mm)
|
Horizontal span (m) |
Vertical Span (m)
|
Angle º |
Insulator Type
|
Horizontal Span at angel condition |
2D1 SJ1 |
18～27 |
27 |
450 |
650 |
0～20 |
/ |
/ |
Conductor type: 2×LGL-300/40 |
OPGW: JLB-150 |
||||||
3 Tower estimated weight and foundation force
|
Tower Type |
Tower weight scope (kg) |
Foundation force scope (KN) |
|||||
Tmax |
Tx |
Ty |
Nmax |
Nx |
NY |
||
2D1 SJ1 |
16673～19998 |
580～885 |
79～115
|
75～110
|
938～1036 |
122～134 |
118～130 |
4Here is the design strength of Chinese tower steel
Steel material |
Anti-push, bending and press strength (N/mm2) |
Anti-shear strength (N/mm2) |
|
Grade |
Thickness or diameter (mm) |
||
|
Q235 Steel |
≤16 |
215 |
125 |
>16～40 |
205 |
120 |
|
>40～60 |
200 |
115 |
|
>60～100 |
190 |
110 |
|
|
Q345 Steel |
≤16 |
310 |
180 |
>16～35 |
295 |
170 |
|
>35～50 |
265 |
155 |
|
>50～100 |
250 |
145 |
|
|
Q420 Steel |
≤16 |
380 |
220 |
>16～35 |
360 |
210 |
|
>35～50 |
340 |
195 |
|
>50～100 |
325 |
185 |
|
|
Q460 Steel |
≤16 |
415 |
240 |
>16～35 |
395 |
230 |
|
>35～50 |
380 |
220 |
|
>50～100 |
360 |
210 |
|
5 Here is the design strength of our Chinese tower bolts
Item |
Grade |
Anti-push strength (N/mm2) |
Anti-shear strength (N/mm2) |
|
Fastener for towers |
4.8 |
200 |
170 |
5.8 |
240 |
210 |
|
6.8 |
300 |
240 |
|
8.8 |
400 |
300 |
|
|
Anchor bolts |
Q235 |
160 |
/ |
Chinese 35 steel |
190 |
/ |
|
Chinese 45 steel |
215 |
/ |
Remark: above technical data only references for our client, we can design every type for our overseas clients.
MEGATRO is a full service engineering company with a global reputation for delivering excellence and innovation in power transmission, transformation, distribution, and telecommunications systems. Our MEGATRO provide and design this type 220KV 2D1 SJ1 double circuit transmission tower mainly for our Chinese and overseas client. Since 2004, MEGATRO focus mainly international market and had export many kind of transmission structures to overseas clients. MEGATRO has been manufacturing lattice transmission tower & tapered steel poles for lighting, traffic control, communication and utility applications. MEGATRO pioneered the development of transmission tower, telecom tower, substation, and other steel structure and was also at the forefront in the design of Transmission tower.
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