| 摘要 |
A utility pole formed by extrusion comprises a hollow cylindrical body having a wall with an inner and outer circumference. A plurality of support members 8, 10 are integrally formed on a section of the inner circumference. The section has a length of between 10% and 50% of the inner circumference and includes an opening for a door 12. The support members may be arranged equidistant along the section. A support member may further comprise a hollow opening for receiving a door fastener 17. The support members may extend into the hollow body in a range of 5% to 10% of the outside diameter of the body. A method of manufacturing a utility pole comprising the step of cutting the opening and removing the cut material is also claimed. |
