Wind Load Calculations Chimneys, Stack and Vertical Tanks per ASCE 7.02

• 02-25-2013, 01:49 PM
Cragyon
Wind Load Calculations Chimneys, Stack and Vertical Tanks per ASCE 7.02
[FONT=Verdana]Program Description:[/FONT]

[FONT=Verdana]"ASCE798W" is a spreadsheet program written in MS-Excel for the purpose of wind loading analysis for buildings[/FONT]
[FONT=Verdana]and structures per the ASCE 7-98 Code. Specifically, wind pressure coefficients and related and required[/FONT]
[FONT=Verdana]parameters are selected or calculated in order to compute the net design wind pressures.[/FONT]

[FONT=Verdana]Worksheet Name Description[/FONT]

[FONT=Verdana]Stacks & Tanks Analysis of cantilevered chimneys, stacks, and vertical tanks[/FONT]
[FONT=Verdana]Wind Map Basic wind speed map (Figure 6-1 of ASCE 7-98 Code)[/FONT]

[FONT=Verdana]Program Assumptions and Limitations:[/FONT]

[FONT=Verdana]1. This program assumes only enclosed or partially enclosed buildings. Open buildings are NOT considered.[/FONT]
[FONT=Verdana]2. Worksheet for Simplified analysis is applicable for buildings meeting the criteria of Section 6.4.1.[/FONT]
[FONT=Verdana]3. In the worksheet for Simplified analysis, the design MWFRS wind load is calculated for each direction.[/FONT]
[FONT=Verdana]This design load is assumed equal to 1/2 of the total load, as 1/2 is assumed to be taken at roof level and[/FONT]
[FONT=Verdana]the other 1/2 is taken at the base of the building.[/FONT]
[FONT=Verdana]4. Worksheet for MWFRS (Low-Rise) is applicable for low-rise buildings as defined in Section 6.2.[/FONT]
[FONT=Verdana]5. Worksheets for MWFRS (Any Ht.), Wall C&C, and Roof C&C are applicable for buildings with mean roof[/FONT]
[FONT=Verdana]heights of up to 500 feet.[/FONT]
[FONT=Verdana]6. Worksheet for Stacks & Tanks is applicable for cantilevered structures up to 600 feet tall.[/FONT]
[FONT=Verdana]7. Worksheets for Wall C&C and Roof C&C are applicable for flat roof buildings, gable roof buildings with roof[/FONT]
[FONT=Verdana]angles <= 45 degrees, and monoslope roof buildings with roof angles <= 3 degrees.[/FONT]
[FONT=Verdana]8. Worksheets for MWFRS (Any Ht.) and for Stacks & Tanks can handle “rigid” as well as “flexible” buildings[/FONT]
[FONT=Verdana]and structures. For “rigid” buildings or structures, this program uses the smaller value of either 0.85 or the[/FONT]
[FONT=Verdana]calculated value from Section 6.5.8.1 of the Code for the gust effect factor, 'G'. For “flexible” buildings or[/FONT]
[FONT=Verdana]structures, this program calculates the gust effect factor, ‘Gf’, per Section 6.5.8 of the Code based on the[/FONT]
[FONT=Verdana]assumed formula for the fundamental period of vibration from Section 9.5.3.3 of the Code.[/FONT]
[FONT=Verdana]9. This program uses the equations listed in the reference, “Guide to the Use of the Wind Load Provisions"[/FONT]

[FONT=Verdana]Online calculator here:[/FONT]