Calculate Wall Bracing - Part 6 - Design Bracing Systems - Walls

Summary

In this sixth installment of the 'calculating wall bracing' series, the host explores various bracing systems and their resistance capacities. They discuss the requirements for Wind Direction 1 and 2, referencing the Timber Framing Code Table 8.18 for types of bracing like diagonal timber, metal braces, and plywood sheets. The video provides calculations for resistance based on bracing length and material, highlighting methods for installation like Method A and B for plywood. The goal is to determine the number of bracing units needed to withstand forces in different wind directions, with a promise to delve deeper in the next video.

Takeaways

• 🏗️ The video is part of a series on calculating wall bracing, focusing on the different systems available and their resistance capacities.
• 📊 For Wind Direction 1, the required resistance is 26.758 kN, and for Wind Direction 2, it's 10.127 kN.
• 📚 The Timber Framing Code Table 8.18 provides guidelines on the types of bracing and their resistance capabilities.
• 🔍 Diagonally opposed timber and metal brace angles offer a bracing capacity of 0.8 kilonewtons per meter, with a maximum length of 2.7 meters.
• 📐 A tensioned metal strap or brace without stud ties has a resistance of 1.5 kN, and with a length of 2.7 meters, it provides 4.05 kN of resistance.
• 🔩 Metal angle braces with stud ties increase the resistance to 3 kN per meter, resulting in 8.01 kN for a 2.7-meter length.
• 📝 Plywood sheathing offers varying resistance depending on the method of installation and the thickness of the ply, with standard nailing providing 4.8 kN per sheet.
• 🔨 Method A of plywood installation, which involves specific floor fixing and nail quantities, can provide up to 7.68 kN of resistance per sheet.
• 🛠 The resistance of plywood also depends on its thickness, with 4.5mm ply offering 7.5 kN per meter and 7mm ply providing 8.7 kN per meter.
• 📉 Despite the high resistance potential of certain bracing systems, economic and practical considerations may lead to choosing other options.
• 🔄 The next video will address the calculation of the number of bracing units required to resist forces in each wind direction.

Q & A

What is the purpose of the video series 'Buildsum'?

The video series 'Buildsum' is focused on educating viewers on calculating wall bracing, with this particular video being the sixth part of the series.

What are the required resistance values for Wind Direction 1 and Wind Direction 2 as mentioned in the script?

For Wind Direction 1, the required resistance is 26.758 kN, and for Wind Direction 2, it is 10.127 kN.

What is the source of information for the types of bracing and their resistance capacities mentioned in the video?

The information comes from the Timber Framing Code Table 8.18, which outlines different types of bracing and the resistance they provide.

What is the bracing capacity provided by diagonally opposed timber or metal brace angles?

Diagonally opposed timber or metal brace angles provide a bracing capacity of 0.8 kilonewtons per meter.

How much resistance does a tensioned metal strap or a tension brace without any stud ties offer?

A tensioned metal strap or a tension brace without any stud ties offers 1.5 kN of resistance.

What is the resistance capacity of a metal angle brace with stud ties?

A metal angle brace with stud ties has a resistance capacity of 3 kN per meter.

What is the resistance provided by a plywood sheet with standard nailing?

A plywood sheet with standard nailing provides 3.4 kN of resistance per meter.

How does the thickness of the plywood affect its resistance capacity?

The resistance capacity increases with the thickness of the plywood; for example, a 4.5mm thick plywood provides 7.5 kN per meter, while a 7mm thick plywood provides 8.7 kN per meter.

What are the two methods mentioned for fixing plywood to the floor, and what is the difference between them?

The two methods mentioned are Method A and Method B. They differ in the way the plywood is fixed to the floor and the number of nails used, with Method A requiring more work and providing a higher resistance of 6.4 kN per meter.

What is the total resistance provided by a 1.2m x 8.7mm thick plywood sheet?

A 1.2m x 8.7mm thick plywood sheet provides a total resistance of 10.44 kN.

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

The next video will focus on calculating the number of bracing units needed to resist the forces in each wind direction.