Communications Self-Support Tower Restructure
After analyzing this 382-foot communications self-support tower and finding that components were reaching maximum design loads, we undertook a project to restructure the tower, which included the use of temporary bracing for complete removal and the replacement of bracing. Custom-made redundant bracing was also added.
First, a custom-designed temporary brace system was engineered to allow component removal. A rigging plan was composed to accommodate the removal of key bracing, and to serve as a means of lifting personnel to otherwise inaccessible locations on each of the three faces of the tower. A man-rated hoist and trolley line were used in this process, and all hardware and steel components were removed and replaced. The project took 7 weeks from start to finish.
|Capabilities Applied/Processes||A custom designed temporary brace system was engineered to provide for component removal. A rigging plan was necessary to accommodate the removal of the key bracing along with lifting personnel to inaccessible locations.|
|Equipment Used to Install Tower||Man-Rated Hoist & Trolley Line|
|Overall Tower Size||382' self-support tower|
|Construction Methods||The tower was rigged several times to access the three faces of the tower. The tower was fitted with custom temporary bracing to accommodate removal and replacement of bracing. All hardware and steel components removed were replaced with new.|
|Logistics||All materials and tools were delivered to the customer on site by United States Tower Services.|
|Materials Worked With||Engineered Structural Steel and Hardware|
|Industry for Use||Government|
|Standards Met||Tower Analyzed according to ANSI/TIA-222-G|
|Completion Time||7 weeks|
|Tower Type||Self-support HF antenna tower|