| 摘要 |
An apparatus for the flameless retrofit of a monopole tower with additional portholes is presented. The apparatus includes a frame, a front plate, a back plate, and a plurality of fasteners. The frame has a through hole which defines a porthole allowing access to the interior of the monopole. The front plate has an opening which fits about the frame and is contoured to match the exterior surface of the monopole. The back plate has an opening shaped which fits about the frame. The back plate is fixed to the frame so that the frame extends from both sides of the back plate and through a crude opening cut into the monopole. The back plate is contoured to match the interior surface along the monopole. The front and back plates are disposed about the crude opening and attached to the monopole via the fasteners. Each fastener passes through holes mutually aligned along each of the front plate, monopole, and back plate. The apparatus and mechanical fastening means ensure the structural integrity of a monopole tower and completely avoid the need for welding methods during assembly onto the monopole.
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