Calculate Wall Bracing - Part 2- Determine Wind Pressure

Summary

In this educational video, the host delves into calculating wind pressure for wall bracing in building construction. Focusing on different wind directions, the video explains the use of tables 8.1 to 8.5 to determine lateral wind pressure, essential for structural integrity. The host provides a step-by-step guide on selecting the correct table based on roof pitch and building dimensions, ultimately calculating pressures for both the long and short sides of a building. Viewers are encouraged to subscribe for more informative content.

Takeaways

• 🏗️ This video is part two of a series on wall bracing, focusing on calculating wind pressure for different wind directions.
• 📚 The racking force of a building is determined using the method outlined in paragraph 8.3.4, or an alternative method in appendix F.
• 🔍 The alternative method is a simplified procedure that provides a more conservative (safer) solution, requiring more bracing.
• 💡 The video opts for a more economical approach by not using the alternative method, aiming for a balance between safety and cost.
• 📏 The total racking force for each story or level is calculated by multiplying the projected area of the building's elevation by the lateral wind pressure.
• 🌐 Calculations are performed for both the long and short sides of the building, considering two wind directions.
• 📊 The formula for calculating wind pressure is given in kilonewtons, where total racking force equals the area of elevation (in square meters) times the lateral wind pressure (in kiloPascals).
• 📚 Tables 8.1 to 8.5 are used to determine the lateral wind pressure, with specific tables applicable for different building configurations and roof pitches.
• 🏡 For the example building in the video, Table 8.2 is used for the long side and Table 8.4 for the short side, based on the building's dimensions and roof pitch.
• 📏 The building used in the example has a pitch of 30 degrees, is 14.840m long, and 7.270m wide.
• 💨 The lateral wind pressure for the long side of the building is calculated to be 1.1 kPa, and for the short side, it is 1.2 kPa.

Q & A

What is the main topic of the video?

The main topic of the video is calculating wind pressure for wall bracing in building construction, specifically for different wind directions.

Why is the alternative method in Appendix F mentioned in the video?

The alternative method in Appendix F is mentioned because it provides a simplified and more conservative solution for determining racking force, requiring more bracing.

What is the formula used to calculate the total racking force?

The formula to calculate the total racking force is the area of elevation in square meters multiplied by the lateral wind pressure in kiloPascals.

How many wind directions are considered in the calculation?

Two wind directions are considered: one acting on the long side and one on the short side of the building.

What tables are used to determine the lateral wind pressure for different building elevations?

Tables 8.1 to 8.5 are used, with specific tables chosen based on the building's story, roof pitch, and whether the calculation is for the long or short side.

Why is it important to choose the correct table for the building's elevation?

Choosing the correct table ensures accurate calculation of the lateral wind pressure, which is crucial for structural safety and compliance with building codes.

What is the lateral wind pressure for a building with a 30-degree pitch and 14.8 meters in length, according to Table 8.2?

The lateral wind pressure for the long side of the building is 1.1 kiloPascals.

How does the building's width affect the selection of the lateral wind pressure value from Table 8.4?

The building's width determines which width category to use in Table 8.4, as the table provides values for different width ranges, and the closest larger value should be selected if the exact width is not available.

What is the lateral wind pressure for the short side of a building with a 30-degree pitch and 7.2 meters in width, according to Table 8.4?

The lateral wind pressure for the short side of the building is 1.2 kiloPascals.

What will be the focus of the next video in the series?

The next video will focus on calculating the area of the building's elevations and then determining the racking force using the previously calculated wind pressures.

How can viewers stay updated with the video series?

Viewers can subscribe to the presenter's YouTube channel or follow them on Facebook to receive updates on more videos in the series.