Site Data Wind Analysis (with SCIPHYR & Google Maps) Integration

You can select the site data from the Wind Site map by clicking on the button in the right hand panel or from the Loads > Wind Panel Loading (Pro) > Site Data Wind Analysis menu.

Once in the site data you can select the particular site for your building by;

Picking the site location from the GB site map
Picking the site location from the Irish site map
Manually inputting the national grid reference NGR
Inputting the site’s Eastings and Northings
Select the location using postcode

You can examine the wind pressure values calculated by scrolling to the bottom of the output screen. You will see that wind pressure values are determined for the different heights in the structure, for each wind direction specified and also for each wind diagonal.

Select File> Exit MasterKey Wind Analysis, to take you back into your model. The dynamic wind pressures for the site will have been automatically applied to your model on exiting the Wind Analysis.

For a building outside of the Britain Isles click on the ‘Set Default Site’ button in the Site Data tab, then enter the relevant site data as described in Site Data Wind Analysis – Background section below.

For additional information on the site data, local obstructions, fetches and topography see Site Data Wind Analysis – Background section.

Site Data Wind Analysis – Background

The MasterKey Wind Analysis Site Data is based on a third party piece of software that integrates seamlessly with MasterFrame (Pro). In the Site Data interface there is the main map of the UK or Ireland alongside a more detailed local map. There are also 2 circular diagrams based on the chosen site location, one indicating your structure surrounded by 30 degree segments and the distances to sea, country and town displayed in blue, green and red. The second diagram indicates the distribution of wind pressure around your structure. Below the main maps, the calculations are displayed.

Choosing a Site Location from the Wind Data Map

A location is chosen from the MasterKey Wind Analysis site data map for Great Britain or Ireland, or if outside these areas a default site can be set up to generate the wind pressures for a particular location. Pick a site directly off the map or enter the site grid references, if known, to get exact site information. (Note - grid references can be obtained from various internet sites, for example, www. multimap.com, based on the site address or post code.) You can also enter the eastings and northings, if known.

Accurate wind and topographical information is contained within the Wind Map database. This information is used by the program to obtain the wind pressures on a structure as it varies with height and orientation. Several wind diagonal lengths can be taken into account. The user can choose which analysis method to employ.

Site Data Tab

The Site Data tab enables you to enter a title reference and select which map type to be the main graphic. You can choose between the GB site or Irish site maps. The grid references are shown here and can be manually changed if you know the exact grid references for your particular site. The basic wind speed and site altitude are given. The data for a particular site can be saved as an independent file for future re-loading (Save/Load Site to file). If the site is outside Great Britain or Ireland, you can set up a file containing a default (overseas) site, using the Set Default Site button. The site information for an overseas site is manually entered in the following tabs, so that the wind pressures can be accurately calculated.

You can also specify an SP Value - Risk Value of 10,000 years, which is used in the wind site risk factor allowing for analysis and design of diverse structures.

The Site Data tab also allows you to specify the orientation of your building relative to the North, so as to ensure accurate application of the wind loading to the individual faces of the structure.

Obstructions Tabs

If there are obstructions in the vicinity of the structure being examined, these can be taken into account by specifying the height of and distance to the obstructions at intervals of 30 degrees around the building. These are normally automatically entered from the in-built database, but can be overridden if desired.

If the orientation of the building is known, the UK Sd factors can be used to reduce the wind pressures around the building. If the orientation is not known or is outside the UK or Ireland, the Sd factors should be set equal to 1.

Sea/Country/Town Tab

Fetch distances and category types are automatically included when a site is selected from the Great Britain/Ireland map. For a site outside Great Britain/Ireland, the values can be entered manually for each orientation.

Topography Tab

The local topography can be taken into account resulting in modification of the wind loading. This can be done using the internal data within the wind map or altered manually.

There is an option to use the site altitude only to evaluate the wind loading ignoring the effects of local topography.

Report (Output) Tab

On the Report (Output) tab, the user can select which method to employ for the calculation of the wind loads – Standard, Hybrid, Directional or Designer’s Guide. Having settled on the appropriate method, the screen and printing output options can be selected. The basic wind speed automatically selected from the map may be changed if desired, as can the start and length of the season under consideration. Building floor levels and wind diagonal lengths can be changed from the defaults if necessary (note – when used in conjunction with MasterFrame (Pro), these values are automatically taken from the model). Select the risk period from the droplist. Finally the graphics scale and number of segments can be varied. The wind pressure diagram can be viewed for each wind diagonal length a, if applicable

Videos

Skip to 01:25 Introduction to the New SCIPHRY Integration (including Google Maps)

Skip to 12:50 - Wind Site Data Updates including SCIPHYR and Integrated Google Maps

Further Help

Some further resources on the SCIPHYR Site Data Wind Integration