DCPZP-2012-00336 (2) - Laserfiche WebLink

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February 24, 2012 Page 2 of 3 The November 10, 2011 RF configuration identifies that the proposed loading will consist of: • (9) Andrew SBNH-1 D6565B panel antennas (3 per sector) • (12) Andrew ETD819HS12UB TMAs (4 per sector) • (3) Ericsson RRUS-1 1 Units (1 per sector) • (1) Raycap DC6-48-60-18-8F Surge Suppressor To summarize our findings, AT&T currently has a total of six (6) panel antennas installed at the site. The existing antennas are mounted to pipe mounts that are stud welded to the top of the water tower ball. GOODMAN is proposing to remove all six (6) of the existing antennas and install nine (9) Andrew SBNH- 1 D6565B antennas (three per sector) at a centerline elevation of 116-feet AGL. The proposed antennas shall be mounted to the existing pipe mounts and new pipe mounts, which shall be installed on top of the water tower ball. GOODMAN is also proposing to install three (3) Ericsson RRUS-1 1 Units (one per sector) and one (1) Raycap DC6-48-60-18-8F that will also be mounted to the new pipe mounts. The existing TMAs shall remain as is. New pipe mounts are required for the additional antennas and they shall be P2.5STD (2-7/8-inch O.D.) Sch. 40 pipe mounts and they shall be installed in a similar fashion as the existing mounts. The new mounts shall utilize 3/8-inch stiffeners, a 12-inch square 1/2-inch thick base plate, and four (4) 3/8-inch CD stud welds. All new hardware shall be galvanized or painted and caulk shall be installed around the perimeter of the plate to insure a water-tight seal. A rubber membrane between the tank and base plate may also be used. The existing mounts will experience increased dead and wind loads from what is currently present as a result of the installation of the proposed antennas and equipment. However,these load increases are not anticipated to have a significant effect on the structural adequacy of the existing mounts. Also,the additional dead and lateral load resulting from the installation of the proposed antennas is minor when compared to the weight of the tower and existing wind loads acting upon the water tower itself. Therefore, it is RAMAKER's assessment that the proposed mounts,existing mounts, and water tower structure will adequately support the proposed antenna configuration. As such, it is the finding of RAMAKER that no further assessment is required and the structure will provide adequate support for the modifications proposed by GOODMAN on behalf of AT&T. Please note, as previously considered, RAMAKER has assumed that the original installation included an appropriate structural evaluation of the radio equipment cabinets/racks, batteries,TMAs/RRUs, antenna and/or mount installation to the structure and the structure was then identified to be adequate to support the then-proposed antenna loading. Any discrepancies in these assumptions may void the results of this Level One assessment. The recommendations contained within this report were developed using general project information provided as previously described. All recommendations pertain only to the proposed antenna installation activities as described in this report. RAMAKER assumes no responsibility for failures caused by factors beyond our control. These include but are not limited to the following: 1. Missing, corroding, and/or deteriorating members, 2. Improper manufacturing and/or construction,or 3. Improper maintenance. RAMAKER assumes no responsibility for modifications completed prior to or hereafter in which RAMAKER was not directly involved. These modifications include but are not limited to the following: 1. Replacing or strengthening bracing members, 2. Reinforcing or extending vertical members, 3. Installing or removing antenna mounting gates or side arms,or 4. Changing loading configurations