This photo refers to our H type medium angle pole for 22KV transmission line project, mainly for 11/22KV distribution line cherry double pin angle construction steel pole, with technical specification as follow:
- CONDUCTOR ACSR Cherry.
- OPGW Diameter = 10,5 mm and 412 kg/m (minimum breaking load 101KV, and max tension as 90% min break load
- Column made by a section type H with 52.2 kg/m and h = 12.00 mt
- Cross-arms made by a section type square 75x75x3 long = 2.10 mt
- The pole was evaluated for the five (5) Conditions of Tree loads
1 Max Wind
2 Break conductor No 1
3 Break conductor No 2
4 Break conductor No 3
5 Wind in Service
- Pole angle: 16-60°
- Allowable deflection at pole top: 5% of exposed length
- Design temperature: minimum 15 degree and maximum +80 degree
The steel used for poles is UC Universal Column Beams Type UC 200 52.2kg/m, 12 m long AS/NZS 3679.1:1996 G300
For this type H pole, our production as follow:
1.1 All steel for pole as Chinese steel Q345
1.2 Pole shaft, bearing plate and top cap will be hot dipped galvanized after fabrication, including all drilling, cutting and welding. Galvanizing shall be done in accordance with the requirements of the specification and the minimum average thickness of coating shall be 86 microns, equivalent to 610g/m2.
1.3 All bolts, nuts and locknuts for top cap, bearing plate and earthing nuts shall be steel grade 46 and comply with requirements of ASTM A 307 and ASTM A563. hot dipped galvanization will in accordance with requirements of specification with minimum average coating thickness 53 microns, equivalent to 381g/m2
1.4 Shearing and cutting shall be performed carefully and all portions of the work shall be finished neatly. Copes and re-entrant cuts shall be filleted before cutting.
1.5 All forming and bending during fabrication shall be done by method that will prevent embrittlement or loss of strength in the material being worked.
1.6 All welding operation shall be done in accordance with Chinese standard.
1.7 Bolt holes as specified in the applicable drawings shall be punched or drilled. Holes maybe punched when the material thickness does not exceed the diameter of the hole. Holes of any diameter maybe drilled, holes shall be cylindrical, perpendicular to the pole shaft, free of burrs, and clean cut without torn or ragged edges. The use of burring torch for cutting holes will not be permitted.
1.8 Extra holes for the purpose of lifting or other than those specified in the drawings shall not be permitted.
1.9 All pre-drilled holes shall be provided with durable ultra-violet resistant, plastic plugs.
1.10 Steel pole will be provided with M12 earthing nut at the location specified in applicable drawings. Hot-dipped galvanized M12X30mm long hexagonal bolt with washers shall be screwed on to the earthing nuts.
1.11 Steel poles will be provided with detachable top cap and base bearing plate. Flat bar with drilled and tapped hole to suit M12 bolt shall be welded to the top and bottom of the pole for attaching the top cap and base bearing plate, respectively. Hot-dipped galvanized M12X30 hexagonal bolts and washers shall be provided for attaching the top cap and base plate.
1.12 Straightness of the pole shaft shall be within 1mm/m and without any twist.
For this H pole, we also take horizontal and vertical loading testing before mass production, we also equipped power fitting and other accessories for our client.