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PDC CORP <br /> r-- ARCHITECTURAL • CIVIL • STRUCTURAL • ELECTRICAL <br /> 4555 LAS POSITAS RD , BLDG A, STE B TEL (925)606-5868 <br /> LIVERMORE, CA 94551 FAx (925)447-5656 <br /> b COMPRESSION LOADS ON DIAGONAL MEMBERS AT SECTION 20 FT TO 40 FT ABOVE GROUND <br /> EXISTING L1-1/2x1-1/2x1/8 (99 4%STRESS) <br /> P=3150 75 LB <br /> L=79 FT <br /> SIZE= L1-1/2x1-1/2x1/8 <br /> A=03594 SF <br /> PROVIDE SISTER DIAGONAL MEMBER L1-1/2x1-1/2x3/16(SEE DETAILS) <br /> 6. CONCLUSIONS <br /> BASED ON THE PRECEDING RESULTS THE STRUCTURE WILL BE EXPERIENCING 90%STRESS LEVEL AT VERTICAL LEGS <br /> AFTER PROPOSED RETROFIT <br /> Page 6 of 21 <br />