1. About & Disclaimer

    This design software calculates the unfactored design wind loading on walls and roofs of buildings with a rectangular shape in plan. The loading is calculated in accordance with BS EN 1991-1-4, the UK National Annex, and PD 6688-1-4. Roofs may be flat, monopitch or duopitch. Orography is assumed to be not significant. The user must define the dimensions of the building and provide sufficient geographic data for the evaluation of peak velocity pressure.

    Although care has been taken to ensure that the calculated results are correct, users should verify the output. The Steel Construction Institute and other parties associated with this software and website assume no responsibilities for errors or misuse of this software, or damage arising from use of this software.

  2. Provide Input
    Building length, building width, eaves height, roof type, roof slope, internal pressure coefficients, wind speed, site altitude, seasonal factor, terrain type, distance to the sea, distance into town, distance to upwind shelter, average height of shelter.
  3. Calculate and review Output
    Launch calculation and review the results