Laserfiche WebLink
January 30, 2023 <br /> 12.5 ft Sector Frames Mount Replacement Analysis CC!BU No. 856390 <br /> Order 628726, Rev. 1 Page 5 <br /> 4)ANALYSIS RESULTS <br /> Table 3—Mount Component Stresses vs. Capacity <br /> Notes Component Critical Centerline %Capacity Pass I Fail <br /> Member (ft) <br /> 1,2 Connections - 68% • Pass <br /> 1,2 Corner Bracing Pipe M198 98 50% Pass <br /> 1,2 Mount Pipes M98 44% Pass <br /> 1,2 Rear Pipe M31 33% Pass <br /> Structure Rating (max from all components)= 68% <br /> Notes: <br /> 1) See additional documentation in Appendix C and Appendix D for calculations supporting the%capacity consumed. <br /> 2) A structure rating of 105%or less is within engineering tolerances and considered acceptable. <br /> Table 4—Tieback Connection Data Table <br /> Resultant <br /> Tower Connected Member <br /> Connection Existing/ End Member Connected Compressive Notes <br /> Node No. Proposed Re(lb) Type Member Size Capacity(IV <br /> N19 Proposed 2345 Leg BP 8X0.25 3343.5 1,3 <br /> N956 Proposed 514 Leg BP 8X0.25 3343.5 1,3 <br /> Notes: <br /> 1) Tieback connection point is within 25%of either end of the connected tower member. <br /> 2) Tieback connection point is NOT within 25%of either end of the connected tower member. <br /> 3) Reduced member compressive capacity according to CED-STD-10294 Standard for Installation of Mounts and Appurtenances. <br /> 4.1) Recommendations <br /> The proposed mounting configuration will have sufficient capacity to carry the referenced loading. In order for the <br /> results of this analysis to be considered valid, the following mounting configuration shall be installed: <br /> ■ Replace existing platform with new sector frames.Install longer mount pipes in lieu of those included in the <br /> mount kits and vertically center antennas no higher than 4'-6" above upper face horizontal pipes. At each <br /> sector, install both included tie-backs on left side (looking at back of mount) and attach to adjacent tower <br /> leg within 1-8"of a tower bracing point <br /> o (3)CommScope SFG22HDX12-4-H10(ANT.44323) <br /> o (9)Pipe 2.5 Std.x 12'-0"antenna mount pipes <br /> o (6)Pipe 2 Std.x 6'-0"radio mount pipes <br /> o (12)CommScope XP-2020(ANT.16506)crossover kits for radio mount pipes <br /> • Install new face horizontal pipes at all sectors and new corner bracing pipes to link them together. <br /> o (3)Pipe 2.5 Std.x 12'-6"face horizontal pipes <br /> o (6)Pipe 2 Std.x 10'-0"corner bracing pipes <br /> o (21)Sabre C10902012(ANT.16338)crossover kits <br /> • See Appendix E for additional details. <br /> Beyond the mount replacement, no structural modifications are required at this time, provided that the above-listed <br /> changes are implemented. <br /> ENG-FRM-10208, Rev. E <br />