ASCE 7 10 CHAPTER 27 SERIES

This tab displays the story data that was previously collected, and it requests the Building Construction Type and the values of Li necessary to complete the check to determine if the approximate methods of frequency determination are applicable. So if a building turns out to be 'Rigid' in one or both directions, then the values of e Rx and e Ry are not required in those directions, and the values can be left at zero or a value can be entered, but the program will ignore it.ДЇrequency (Only displayed if the option is selected on the General tab to 'Calculate Frequency') Second, the values of e Rx and e Ry are only used if a building is determined (or defined) to be 'Flexible' (< 1 Hz) in a particular direction. First, the Height to Story is always referenced from grade, so it is looking to collect the height from grade to the story of interest, not the story to story height. Two items are worthy of note on this dialog. The development of the story data table is controlled by the three buttons: Add Level, Edit Level, and Delete Level, which perform their respective operations on the table of story data.Д¬licking Add or Edit opens the Story Information pop-up dialog as shown above. This tab collects the data required to define the vertical locations of the stories with respect to finished grade. Note that if the second option is selected, a new tab named 'Frequency' will be introduced between the 'Story Data' tab and the 'Gust Factor' tab. The third option allows the user to explicitly specify the frequency in the North-South direction and in the East-West direction. The Building Flexibility Selection offers three different options for defining the frequency of the building. For this reason, the program allows the Exposure Category to be defined separately for each building face in turn becoming the windward face. Therefore, as different building elevations become the windward face of the structure, it is possible that the Exposure Category will change. The Exposure Category is dependent upon the upwind characteristics. It no longer influences the importance factor, but it does dictate which Wind Speed map to use to determine the Basic Wind Speed. The Risk Category is only for reference in documenting the design. This tab collects basic data such as Risk Category, Basic Wind Speed, Directionality Factor, Building Dimensions, Exposure Category, Topographic Factor, and information to determine how the building frequency will be determined. General (sub-tab of the ASCE 7-10 Wind Force Evaluation tab) The Print checkbox specifies whether or not the particular wind load calculation will or will not be included when a Print command is clicked or when a Project Print is performed. The Description field can be used to distinguish from among the different wind load calculations that might be defined in a single Project File.

These might be useful for studying different project sites, different architectural concepts, or even evaluating separate buildings in a project.

ASCE 7 10 CHAPTER 27 SERIES

This tab provides access to a series of Calculation tabs that can be used to store up to ten separate wind calculations. The General tab provides an input field for a general description of the project and/or the wind calculations that are being performed. Limited documentation is provided here, because all of the references to ASCE 7-10 are given on the module screens. This module is a presentation of the Wind Forces provisions of Chapter 27, Part 1 of ASCE 7-10.

Asce 7 10 chapter 27