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ASCE 7-16 Wind Forces, Chapter 27, Part 1 LIC# : KW-06016886, Build:20.23.10.02 LEE & LEE STRUCTURAL ENGINEERING INC.(c) ENERCALC INC 1983-2023 Project File: 201 W 19th St.ec6 Project Title: Engineer: Project ID: Project Descr: West Gust Factor Calculation, Building RIGID for Wind from West direction GUST FACTOR =0.840Calculate Gust Factor per ASCE 26.11.5 for Rigid Buildings From Table26.11-1 : C =0.300 Zmin =30.000 320.000l = eBar =0.333 ( Eq. 26.11-6 )G =0.840 Lz bar =309.993 ( Eq. 26.11-9 )Iz bar =0.305 ( Eq. 26.11-7 ) Q =0.856 ( Eq. 26.11-8 ) Enclosure Check if Building Qualifies as "Open" ft^2 Roof Total ft^2 0.0 ft^2 ft^2 0.0 ft^2 North Wall South Wall East Wall West Wall ft^2Agrossft^2 ft^2 ft^2 Aopenings ft^2 ft^2 ft^2 Aopenings >= 0.8 * Agross ?Yes Yes Yes Yes Building qualifies as "Open"All four Agross values must be non-zero North Elevation : Determine Enclosure Classification per ASCE Section 26.12 Building is "Enclosed" when the North wall receives positive external pressure Reference area = smaller of 4 sq. ft. or 1% of Agross 0.0 ft^2 Aoi = Ao-total - Ao 0.0 ft^2= = Agi = Ag-total - Ag 0.0 ft^2= Aoi / Agi 0.0 Is Ao > 1.10 * Aoi ?No = Is Ao > Reference Area ?No = Is Aoi / Agi >= 0.20 ?=Yes = South Elevation : Determine Enclosure Classification per ASCE Section 26.12 Building is "Enclosed" when the South wall receives positive external pressure Reference area = smaller of 4 sq. ft. or 1% of Agross 0.0 ft^2 Aoi = Ao-total - Ao 0.0 ft^2= = Agi = Ag-total - Ag 0.0 ft^2= Aoi / Agi 0.0 Is Ao > 1.10 * Aoi ?No = Is Ao > Reference Area ?No = Is Aoi / Agi >= 0.20 ?=Yes = East Elevation : Determine Enclosure Classification per ASCE Section 26.12 Building is "Enclosed" when the East wall receives positive external pressure Reference area = smaller of 4 sq. ft. or 1% of Agross 0.0 ft^2 Aoi = Ao-total - Ao 0.0 ft^2= = Agi = Ag-total - Ag 0.0 ft^2= Aoi / Agi 0.0 Is Ao > 1.10 * Aoi ?No = Is Ao > Reference Area ?No = Is Aoi / Agi >= 0.20 ?=Yes = West Elevation : Determine Enclosure Classification per ASCE Section 26.12 Building is "Enclosed" when the West wall receives positive external pressure Reference area = smaller of 4 sq. ft. or 1% of Agross 0.0 ft^2 Aoi = Ao-total - Ao 0.0 ft^2= = Agi = Ag-total - Ag 0.0 ft^2= Aoi / Agi 0.0 Is Ao > 1.10 * Aoi ?No = Is Ao > Reference Area ?No = Is Aoi / Agi >= 0.20 ?=Yes = Velocity Pressures psf When the following walls experience leeward or sidewall pressures, the value of Kh shall be (per Table 26.10-1) : North Wall =0.7168 South Wall =0.7168 psf East Wall =0.7168 psf West Wall =0.7168 psf When the following walls experience leeward or sidewall pressures, the value of qh shall be (per Eq 26.10-1) : North Wall =14.077 psf South Wall =14.077 psf East Wall =14.077 psf West Wall =14.077 psf qz : Windward Wall Velocity Pressures at various heights per Eq. 27.3-1 Height Above Base (ft) North Elevation East Elevation West Elevation Kz qz Kz qzKzqzKzqz South Elevation 0.575 11.290.00 0.57511.29 11.29 11.290.5750.575 0.575 11.295.00 0.57511.29 11.29 11.290.5750.575 0.575 11.2910.00 0.57511.29 11.29 11.290.5750.575 74 of 81 210 W 19th St 4/14/2025