YOW 225 TU/TUH Operable Window System Frame Width " A " MULLION DESIGN PRESSURES Frame Width " B " 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. Notes: 1.) Design pressures are limited either by mullion or anchor screw capacity. 2.) Refer to Florida Product Approvals or Engineer of Record for minimum anchor requirements. 3.) Design pressures values apply to mullion where two or more windows are listed in a single opening. Lesser design of individual window or mullion of installation shall govern. E9-4518 Clipped Stacking Mullion Design Pressure Chart *1-Maximum Design Pressure Capacity (PSF) +/- (Up to and including Florida's HVHZ - Impact) Used on YOW 225 TU / YOW 225 TUH Mull Span [Inches] 35 48 54 62 66 72 80 84 Tributary Width [Inches] - Frame 12 150.0 138.3 121.0 103.7 96.8 88.0 78.5 74.5 18 148.9 99.3 86.1 73.1 67.9 61.5 54.5 51.6 24 126.3 80.7 69.2 58.1 53.8 48.4 42.7 40.3 36 113.8 64.5 53.8 44.0 40.3 35.9 31.2 29.3 42 113.8 61.5 50.3 40.5 36.9 32.5 28.1 26.3 48 113.8 60.5 48.4 38.2 34.6 30.3 25.9 24.2 56 113.8 60.5 47.8 36.6 32.8 28.3 23.9 22.2 60 113.8 60.5 47.8 36.3 32.3 27.7 23.2 21.5 62-3/8 113.8 60.5 47.8 36.3 32.1 27.4 22.9 21.2 E9-4518 Unclipped 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 Mull Span [Inches] 35 48 54 62 66 72 80 84 Page-58 Tributary Width [Inches] - Frame 12 150.0 150.0 150.0 150.0 150.0 150.0 150.0 150.0 See notes 1, 2, and 3. 05-1003-12 | Effective Date: June 2, 2021 18 150.0 150.0 150.0 150.0 150.0 150.0 150.0 150.0 24 150.0 150.0 150.0 150.0 150.0 150.0 130.1 117.6 36 150.0 150.0 150.0 150.0 137.2 113.3 90.2 81.3 42 150.0 150.0 150.0 141.7 122.4 100.4 79.4 71.3 48 150.0 150.0 150.0 131.2 112.5 91.4 71.7 64.2 56 150.0 150.0 150.0 123.6 104.5 83.6 64.6 57.6 60 150.0 150.0 150.0 122.2 102.3 81.1 62.1 55.2 62-3/8 150.0 150.0 123.1 81.3 67.7 53.3 40.6 36.0 Mullion Span