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I I � <br /> ' ' � I <br /> , i � <br /> U�tS Grreiner <br /> ' � Job. ' 1690472.12 Project no. LCC-440.106.4 Sheet. of <br /> Description. TOWER�ANAYLSIS Computed By Date. MAY 4, 1998 <br /> EXISl;ING PLATFORM ANTENNA WIND LOAD Checked By. Date. <br /> ' I <br /> EXIS3TING WIND LOAD 8�WT. DUE TO PLATFORM: <br /> ' I , <br /> APPLICABLE EQUATIONS: <br /> , SOLIDITY RATIO,e=(AF+AR)/AG <br /> , I <br /> � STRUCTURE FORCE COEF.,CF: <br /> � CF=3.4(e)^2-4.7(e)+3.4 FOR TRIANGULAR CROSS SECTIONS <br /> ; � <br /> ' � , REDUCTION FACTOR FOR ROUND STRUCTURAL COMPONENTS: <br /> ! RR=0.51(e)^2+0.57 <br /> I <br /> ' RR MAX.=1.0 <br /> � <br /> i � EFFECTIVE PROJECTED AREA,AE: <br /> I , <br /> ' i ; AE_(DF)(AF)+(DR)(AR)(RR) <br /> ', ! DF=1.0 FOR NORMAL WIND AGAINST SQUARE 8�TRIANGULAR TOWERS <br /> ' ; DR=1.0 FOR NORMAL WIND AGAINST SQUARE TOWERS AND ALL WIND <br /> i AGAINST TRIANGULAR TOWERS <br /> ' I <br /> i ; HORIZONTAL WIND FORCE, F=(qz)(GH)(CF)(AE) <br /> • ; � F MAX= (2)(qz)(GH)(AG) <br /> ' I <br /> EXISTING WIND!LOAD 8 WT. DUE TO ANTENNA PLATFORM (105 MPH WIND�: <br /> i <br /> 1 ; i <br /> PLATFORM AT EL 195' <br /> � FACE DIMENSION 5' H x 15'W <br /> � LEG MEMBERS (5"W5x16+5"CHANNEL)x 15' <br /> , � ' HORIZONTAL MEMBERS L2x2x1/4 x 15' (TYP OF 2) <br /> I � DIAGONAL MEMBERS 2.375"O.D PIPE x 8.5' (TYP OF 4) <br /> ' HORIZONTAL WIND FORCE,F=(qz)(GH)(CF)(AE) <br /> i � AF [(5"+5")/12](15')+(2/12)(15')(2)= 17.50 SF <br /> I ' AR= (2.375/12)(8.5')(4) 6.73 SF <br /> , i AG= (5')(15')= 75.00 SF <br /> e- 0.32 <br /> � DF- <br /> j ; 1.00 <br /> ' j , �R- 1.00 <br /> �' � RR- 0.62 <OR=1.0 <br /> � I ; CF- 2.24 <br />', , ' AE= 21.69 SF <br /> i QZ- 46.89 <br /> GH= 1.116 <br /> , • F MAX= 7849.39 <br /> i <br /> F- 2538.90 LBS <F MAX,OK <br /> ' � ' WEIGHT ASSUME= 2926.00 LBS <br /> I <br /> il <br /> � <br /> I � <br />� , I � I <br /> i <br /> � � <br /> i <br /> , i � <br />