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  1. Structure and Wind Load Due to Friction

    Wind Force Due to Friction

    The wind, which blows parallel to the surfaces of a structure, can generate friction forces on these surfaces. This effect is mainly important for very large structures.

  2. Figure 01 - Graded Wind Load Over Different Building Heights

    Wind Depending on the Structure Height for Vertical Walls

    The wind loads are regulated according to Eurocode 1 - Actions on structures - part 1-4: General actions - Wind loads. The nationally determined parameters of a respective country can be found in the National Annexes.

  3. Classification of Surfaces Total Pressure Coefficients

    Determination of Wind Loads for Canopy Roof Structures According to EN 1991-1-4

    If a canopy roof, for example a filling station roof, should be designed, a load determination having regard to Section 7.3 of EN 1991-1-4 is required. This article shows with an example the design of a slightly inclined troughed roof.
  4. Figure 01 - Snow Load Zones of Germany

    Snow Load on Monopitch and Duopitch Roofs

    In Germany, DIN EN 1991-1-3 with the National Annex DIN EN 1991-1-3/NA regulates the snow loads. The standard applies to civil engineering works at an altitude of up to 1,500 m above sea level.
  5. Figure 01 - Generating wind loads

    Consideration of the Correlation with Wind Loads

    If the wind load for buildings or structures is to be determined by the simultaneous assumption of aerodynamic pressure and suction coefficients on the windward and leeward sides of the building, the correlation of the wind pressure on zones D and E of the wall surfaces may be taken into account.
  6. Figure 01 - Frame Dimensions

    Determining Force Coefficient of Resulting Member Loads for Plane Lattice Structures from Wind Load

    This article presents a simple example of a lattice structure to explain how to determine wind loading as a function of the lattice solidity.

  7. Figure 01 - Flowchart for Determining cpi

    Determination of Internal Pressure Coefficient cpi for One-Storey Buildings According to EN 1991-1-4

    Wind is the only climatic load acting on every single type of structure in the entire world, different from other loads like snow, for example. The wind size depends on the geographical location of the structure. That is one of the main reasons why today’s standards have regional division (wind zones) and consideration of altitude, as well as variation of dynamic pressure depending on the height above ground for a ‘normal’ site, without masking effect.

  8. Figure 01 - Layout and Dimensions of Cement Silo

    Loads on Silo Hopper According to EN 1991-4

    My previous article describes actions on silos according to EN 1991‑4. With an example of a free standing cylindrical silo for cement with a conical hopper, filling loads of the silo hopper were calculated.

  9. Figure 01 - Wind Load

    Loading According to EN 1991-1-4 and Safety Against Overturning of Circular Cylinders

    This article describes the determination of force coefficients by using a wind load and the calculation of a stability factor due to overturning.

  10. Combination According to EN 1991-1-1

    Combination According to EN 1991-1-1

    In the category H - Roofs, imposed loads have to be applied. These are usually the technician loads for construction and maintenance. Since there is no maintenance for snow, the category H must not include both snow and imposed loads together. You can consider this in the options for automatic combinations.

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