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Project: Muir Chase Plumbing Santa <br />Date: 7/29/ <br />Sample Ballast Calculation : <br />(Note: Red numbers are input values) <br />Step 1: <br />Normalized area for Uplift <br />South Approach <br />Roof kp_MU 0.71 :Anh= <br />............................................................................. <br />Arra 3 cP_MU -0.47 F_v = 133 lb <br />Anv= 48 kp_MS 0.71 Ballast: 26 lb <br />90-180 degree wind <br />cP MS -0.47 F_h = 20 lb <br />angle per IFI report <br />Sharing: 1 Panels 132.85 ag Ballast: 55 lb <br />Step 2: <br />North Approach <br />0-90 degree wind angle <br />per IFI report. <br />Step 3: <br />Output # of Blocks <br />Ballast <br />75 lb <br />Ballast <br />75 lb <br />Blocks <br />3 <br />See wind tunnel test report for <br />definitions of roof zones, array zones, <br />Roof lkff MU <br />1.10 <br />Anh=56 <br />Ar-— <br />Array 1 cP_MU <br />-0.98 <br />........................................................................ <br />F_v = <br />427 lb <br />Anv= 56 kp_MS <br />1.10 <br />Ballast: <br />203 lb <br />cP MS <br />-0.98 <br />F h = <br />— <br />41 lb <br />...................-..........................................................: <br />Sharing: 1 Panels <br />_ 427.29 ag Ballast: <br />264 lb <br />I <br />CITY OF SANTA ANA <br />I f la fti ft a0gk)Wbt!3g Agency <br />24 Engineer: PZSE <br />Approved <br />alfzQ rLQaEWWLT ISSUANCE <br />Master ID: <br />Date: -- <br />N te:Inherentload <br />comoinauon raciors are <br />determined per ASCE 7 <br />section 2.4 <br />Ballast <br />Demands from North and <br />75lb <br />South wind approachare <br />enveloped for per -bay ballast <br />requirements. <br />Where applicable, demands <br />Ballast <br />on skewed arrays are <br />75 lb <br />analyzed per IFI Figure 4.15, <br />Blocks <br />3 <br />Roof Zone 1 <br />Array Zone 1 <br />Blocks Blocks <br />3 3 <br />Step 4: <br />If Allowable weight is <br />exceeded, reduce <br />ballast. Attachments <br />represented by black <br />bays with white text and <br />the word "Anchor". Blocks <br />2 <br />Blocks <br />2 <br />Roof Zone 1 <br />Array Zone 1 <br />Res. Up = 0 lb <br />Res. Lat. = 0 Ib Blocks <br />2 <br />Residual forces are shown to assist the <br />user placing anchors <br />Page 7 of 20 <br />