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1 <br /> PDC CORP ARCHITECTURAL • CIVIL • STRUCTURAL • ELECTRICAL 65)( 4555 LAS POSITAS RD , BLDG A, STE B . <br /> (925)606-5868 <br /> LIVERMORE, CA 94551 FAx (925)447-5656 <br /> 2. ADDED LOADING ON EXISTING LATTICE TOWER <br /> SEGMENT SEGMENT EXPOSURE PROJECTED WIND FORCE ADDED BASE <br /> ELEVATION COEFFICIENT AREA[SF] ON SEGMENT MOMENT <br /> [FT] Kz [LB] [LB-FT] <br /> lx RRU 27'-0" 0.98 (18 5)(20.4)/144=2.62 46.2 1248 <br /> CABLE 13'-6" 0.85 (1/12)(27)=2.25 34.4 464 <br /> lx RRU 19'-0" 0.90 (18 5)(20.4)/144=2 62 42.4 806 <br /> CABLE 9'-6" 0.85 (1/12)(19)=1.58 24.2 230 <br /> lx RRU 14'-0" 0.85 (18 5)(20.4)/144=2 62 40.1 561 <br /> CABLE 7'-0" 0.85 (1/12)(14)=1 17 17.9 125 <br /> lx DC-6 27'-0" 0.98 (12.4)(30.8)/144=2 65 46.8 1264 <br /> CABLE 13'-6" 0.85 (1/12)(27)=2.25 34.4 464 <br /> 3x ANTENNA REPLACE 27'-0" 0.98 (3)(1)(1.7)/144=0.03 0.54 15 <br /> COAX TO ANTENNA 13'-6" 0.85 (3)(7/8)(27)/144= 0.49 7 <br /> FOR RRU AND DC-6 SPECIFICATIONS,SEE SHEET A-5 <br /> 3. ADDED OVERTURNING MOMENT <br /> TOTAL ADDED OVERTURNING MOMENT= 1248+464+806+230+561+125+1264+464+15+7=5 2 kips-ft <br /> EXISTING OTM =365 1 kips-ft(SEE APPENDIX A) <br /> ADDED OTM/EXISTING OTM=5 2/365 1=0 014=1 4%INCREASE <br /> 4. RETROFIT RESOLUTIONS <br /> BASED ON THE PRECEDING RESULTS OF CALCULATIONS PROVIDED BY PDC CORPORATION, DATED SEPTEMBER 25, <br /> 2013 (SEE APPENDIX B),THE EXISTING STRUCTURE IS 98%STRESSED THE ADDED EQUIPMENT LEADS TO INREASED <br /> STRESS OF 1 4% <br /> THE MODIFICATIONS ARE STRUCTURALLY ACCEPTABLE RESULTING IN 99 4%STRESS REINFORCEMENT OF <br /> CRITICALLY LOADED STRUCTURAL MEMBERS IS RECOMMENDED(SEE 5 AND 6 ) <br /> 5. RETROFIT OF EXISTING OVERSTRESSED MEMBERS(SEE APPENDIX A FOR TOWER MEMBERS LOADS) <br /> a COMPRESSION LOADS ON DIAGONAL MEMBERS AT SECTION UP TO 20 FT ABOVE GROUND <br /> THIS MEMBER WAS RETROFITTED DURING PREVIOUS TOWER RETROFIT(SEE APPENDIX B) <br /> Page 5 of 21 <br />