YOW 225 TU/TUH Operable Window System MULLION DESIGN PRESSURES Frame Width "A" Frame Width "B" Mullion Span Tributary Width is determined by the following: (Frame Width "A" + Frame Width "B") / 2 Refer to Florida Product Approvals for anchoring details and additional information. E9-4562 Clipped Stacking Mullion Design Pressure Chart Maximum Design Pressure Capacity (PSF) +/- (Up to and including Florida's HVHZ - Impact) Used on YOW 225 TU / YOW 225 TUH Tributary Width [Inches] - Frame Mull Span [Inches] 12 18 24 36 42 48 56 60 68 150.0 150.0 150.0 150.0 150.0 150.0 150.0 142.3 72 150.0 150.0 150.0 150.0 148.1 143.0 138.5 130.9 76 150.0 150.0 150.0 150.0 137.9 133.0 128.6 121.2 80 150.0 150.0 150.0 140.6 127.4 121.7 116.6 108.1 84 150.0 150.0 143.9 127.4 114.8 109.6 104.9 97.0 88 150.0 150.0 130.6 115.5 104.0 99.2 94.9 87.6 92 150.0 137.9 119.2 105.3 94.7 90.2 86.3 79.6 93-1/8 150.0 134.5 116.2 102.7 92.3 87.9 84.1 77.5 See notes 1, 2, and 3 on previous page. BE9-4579 Unclipped 'I' Mullion Design Pressure Chart Maximum Design Pressure Capacity (PSF) +/- (Up to and including Florida's WZ3 - Impact) Used on YOW 225 TU / YOW 225 TUH Tributary Width [Inches] - Frame Mull Span [Inches] 30 32 34 36 38 40 42 44 46 48 50 47 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 49 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 - 51 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 - - 53 65.0 65.0 65.0 65.0 65.0 65.0 65.0 65.0 - - - 56 65.0 65.0 65.0 65.0 65.0 65.0 65.0 - - - - 59 65.0 65.0 65.0 65.0 65.0 65.0 - - - - - 62 65.0 65.0 65.0 65.0 65.0 - - - - - - 66 65.0 65.0 65.0 65.0 - - - - - - - 70 65.0 65.0 65.0 - - - - - - - - 74 65.0 65.0 - - - - - - - - - *80 65.0 - - - - - - - - - - See notes 1, 2, and 3 on previous page. * 80" Maximum Casement Frame Height 80-3/8" Maximum Fixed Frame Height or Combination Window Height Effective Date: October 1, 2020 | 05-1003-11 Page-59