Hebei Changtong Steel Structure Co., Ltd.
Hebei Changtong Steel Structure Co., Ltd. 20 years of communication tower design and production experience Provide comprehensive professional consulting services Has served countless communication
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Customized Design Angle Steel Bar Telecommunication Telecom Antenna 4 legs Tower
1, Material requirements of angle steel tower
1. The materials used for the tower shall comply with the requirements of the design document, and all steel materials shall be hot-dip galvanized for anti-corrosion.
2. All steel products are qualified products of national large-scale steel plants. The selected steel products are attached with quality certificate, steel factory inspection certificate and other original certificates, and meet the requirements of design documents.
3. The foundation screws are connected with anti-theft nuts, and the others are connected with grade 4.8 ordinary bolts. The quality standard of bolt and nut should meet gb5780-86 and gb41-86 respectively.
4. When the welding structure is made of Q235 steel, E43 welding rod is selected. When Q235 steel is used, E43 welding rod is selected. When different strength steels are connected, welding materials suitable for low strength steels can be used.
| Raw Material | ||||
| No.1
| Grade | Mild Steel | High Tensile Steel | |
| GB/T 700:Q235B, Q235C,Q235D ASTM A36 EN10025: S235JR, S235J0,S235J2 | GB/T1591:Q345B, Q345C,Q3455D ASTM A572 Gr50 EN10025: S355JR, S355J0,S355J2 | |||
| No.2
| Design Wind Speed | Up to 250km/h Or can be customized | ||
| No.3 | Acceptable Deflection | O.5~1.0 degree | ||
| No.4 | Tension Strength | 360~510 MPA | 470~630 MPA | |
| No.5 | Yield strength (t≤16mm) (Mpa) | 355 | 235 | |
| No.6 | Elongation (%) | 20 | 24 | |
| No.7 | Impact strength KV (J) | 27(20°C)---Q235B(S235JR) | 27(20°C)---Q345B(S355JR) | |
| 27(0°C)---Q235C(S235J0) | 27(0°C)---Q345C(S355J0) | |||
| 27(-20°C)---Q235D(S235J2) | 27(-20°C)---Q345D(S355J2) | |||
| Blots & Nuts | ||||
| No.1 | Grade | Grade 4.8, 6.8, 8.8 | ||
| No.2 | Standards for mechanical properties | |||
| No.3 | Bolts | ISO 898-1 | ||
| No.4 | Nuts | ISO 898-2 | ||
| No.5 | Washers | ISO 6507-1 | ||
| No.6 | Standards for Dimensions | |||
| Bolts | DIN7990, DIN931, DIN933 | |||
| Nuts | ISO4032, ISO4034 | |||
| Welding | ||||
| No.1 | Method | CO2 Shielded Arc Welding & Submerged Arc Welding(SAW) | ||
| No.2 | Standard | AWS D1.1 | ||
| Marking | ||||
| Method of marking of the numbers | Hydraulic Press Stamping | |||
| Galvanized | ||||
| No.1 | Galvanization standard of steel sections | ISO 1461 or ASTM A123 | ||
| No.2 | Galvanization standard of bolts and nuts | ISO 1461 or ASTM A153 | ||
| Test | ||||
| Factory test | Tensile test,Elements analysis, Sharpy test(impact test), Cold Bending, Hammer test | |||
Hebei Chang Tong Steel Structure Co., Ltd..located in the hometown of China Tower, is a modern big-scale
professional company fabricating triangular communicationtower,four-corner communication tower, cable tower, single-tube tower,
camouflage communication tower and transmission linetower.integrating design,fabrication and marketing,annual
production capacity reaches more than 30,000 tons.Company always adhere to the business strategy of "survive
by quality, develop by credit, increase efficiency by science and technology", continuously carry out technical transformation,
complete production equipment, reliable production process,adopt advanced CNC angle steel production line, CNC sheet
production line and various supporting equipment. The equipment has a first-class iron tower stakeout center, all of
which implement microcomputer lofting, which guarantees the processing quality and provides a strong guarantee for
production, which can fully meet the design and production requirements of various types of towers and substation
structures.
Our steel tower products have won good reputation from our customers,including China tower,China mobile,China
unicom,China telecom,State grid and so on.In addition,our products also were exported to many countries and
areas,including South American,Africa,Southeast Asia and Ireland.