What House Framing Should I Use? (US Version)

Foreword by Ian Thompson, Editor

Today, Jake Bruton discusses the history and benefits of advanced house framing (US version), specifically focusing on the debate between 16 inches on center and 24 inches on center.

Jake explains how the Department of Housing initially promoted advanced framing to make housing more affordable by using less lumber and more insulation. However, Jake notes that while the code allows for 24 inches on center framing, practical considerations often lead to a mix of both 16 and 24 inch spacing.

Jake also discusses various aspects of house framing, such as subfloor assembly, wall stud spacing, top plates, headers, and corner framing, highlighting the push and pull between structural stability and insulation efficiency. He also touches on considerations for ceiling and roof framing, emphasizing the use of raised heel trusses and energy rooms for increased insulation.

Jake concludes by discussing the benefits of using SPAX for structural connections on the job site. Overall, Jake advocates for a thoughtful approach to framing that combines code compliance with practical considerations for a more efficient and cost-effective build.

What House Framing Should I Use? Video Summary

Exploring Advanced Framing Techniques: Should You Go 16″ or 24″ On-Center?

In today’s session, Jake Bruton tackles a hot topic in the construction world: the debate between traditional house framing and advanced framing methods, specifically when choosing between 16 inches on-center (16″ OC) and 24 inches on-center (24″ OC) stud spacing. This isn’t just about where you place your studs—it’s about structural integrity, energy efficiency, building costs, and the way we think about constructing homes.

A Quick History Lesson

First, a bit of history. Back in the 1960s, the Department of Housing was on a mission to make housing more affordable. They introduced something called Optimum Value Engineering (OVE), which aimed to reduce lumber usage and increase insulation in walls. It was all about optimizing material use without compromising the strength of the structure.

Over time, the term “advanced framing” replaced OVE. Why? It sounds better and emphasizes innovation rather than simply cutting costs. Advanced house framing suggests we’re improving building practices, not just trying to save a buck.

Facing the Challenges

Changing the way we build isn’t easy. Jake shares a story about chatting with a crew member when he first brought up 24″ OC framing. The reaction? Skepticism. The crew member was convinced the house would “fall down.” This kind of pushback is common because people are used to traditional methods.

But here’s the thing: the International Residential Code (IRC) supports advanced framing techniques. Educating your team and local code officials about these practices is crucial. Sometimes, it’s about walking into the building department with your code book and having a conversation.

What the US Code Says

According to the IRC, advanced house framing is permissible under specified conditions:

• Wall Framing: Table R602.3.5 outlines acceptable stud sizes, heights, and spacing. For example, you can use 2×4 studs at 24″ OC for a single-story building with a roof. For multi-story buildings, you might need to shift to 2×6 studs or adjust your design accordingly.

• Top Plates: The code typically requires double top plates but provides exceptions. If you meet certain criteria—like aligning rafters directly over studs—you can use a single top plate. However, Jake’s team often sticks with double top plates for practicality.

• Headers and Jack Studs: The code allows omitting headers in non-load-bearing walls for openings under 8 feet. You can also use header hangers instead of jack studs to reduce lumber use and improve insulation space.

Understanding and correctly applying these provisions ensures your structures are both compliant and sound.

Selective Adoption

Jake’s approach is all about balance. His company doesn’t adopt every advanced house framing method just because it’s in the code. They consider what’s practical and beneficial for each project.

• Subfloor Framing: Despite the code allowing 24″ OC spacing, they usually go with 16″ OC for subfloors. This decision is based on achieving the desired stiffness (L/360 deflection criteria), which is important for preventing issues like cracked tiles.

• Wall Framing: They often use 24″ OC spacing in walls to allow for more insulation and reduce thermal bridging, enhancing energy efficiency.

• Double Top Plates: Even though a single top plate is allowed under certain conditions, using double top plates simplifies construction. It matches standard stud lengths and makes it easier for other trades.

• Headers and Jack Studs: By eliminating unnecessary headers and using header hangers, they reduce lumber usage and improve insulation opportunities without compromising structural integrity.

• Corner Framing: Utilizing two-stud corners and ladder blocking minimizes lumber and improves insulation in those tricky corner areas.

Ceilings and Roofs

For ceiling and roof assemblies, they tend to favor 24″ OC spacing, especially when using trusses.

• Energy Rim: Adding a vertical 2×6 (an energy rim) atop the top plate boosts insulation at the eaves, where space is usually tight.

• Raised Heel Trusses: These trusses have an extended heel to provide more room for insulation without affecting ventilation, improving the building’s energy performance.

• Stacking Members: Aligning studs, joists, and trusses (stack framing) ensures loads are transferred directly and simplifies the construction process.

• Service Cavities: Creating a cavity below the air barrier (by installing strapping perpendicular to the trusses) allows for running electrical and mechanical systems without compromising the air barrier’s integrity.

Weighing up the Pros and Cons

Advanced house framing isn’t just about saving wood; it’s about making smart choices that benefit the project as a whole.

• Material Savings vs. Practicality: While you might save on lumber, some methods could add complexity or labor costs. It’s important to find the right balance.

• Impact on Other Trades: Changes in house framing can affect drywall installation, trim work, and more. Open communication with all trades ensures everyone knows what to expect.

• Building Inspector Relations: Proactively engaging with code officials, showing them the relevant code sections, can prevent misunderstandings and delays.

The Importance of Education

Education plays a huge role in successfully implementing advanced framing.

• Training Your Crew: Helping your team understand the “why” behind these methods can reduce pushback and improve workmanship.

• Understanding the Code: Knowing the IRC provisions inside and out allows you to confidently apply advanced house framing techniques and address any concerns.

• Client Communication: Explaining the benefits—like increased energy efficiency and potential long-term savings—helps clients appreciate the value of advanced house framing.

Aligning with Energy and Sustainability Goals

Advanced framing techniques align well with broader goals of energy efficiency and sustainability.

• Energy Efficiency: More insulation and reduced thermal bridging contribute to a tighter building envelope, leading to lower energy costs.

• Resource Conservation: Using less lumber not only saves money but also reduces environmental impact.

• Improved Comfort: Better insulation and airtightness mean more consistent indoor temperatures, enhancing occupant comfort.

Embracing Industry Innovations

Jake mentions partnering with Spax for fastening solutions. High-quality screws and fasteners improve structural connections and reduce issues like squeaky floors. Embracing such innovations complements advanced house framing techniques and contributes to overall build quality.

Final Thoughts

Choosing between 16″ OC and 24″ OC framing isn’t a black-and-white decision. It’s about considering the specific needs of your project, understanding the code, and making informed choices.

Jake encourages builders to explore where advanced house framing fits into their work. By thoughtfully integrating these techniques, you can improve building performance, reduce costs, and contribute to more sustainable construction practices.

Remember, it’s all about staying informed, being adaptable, and embracing methods that enhance your projects and push the industry forward.

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