While the terms "deep leg track" and "deflection track" might seem distinct, in the context of construction and framing, they often refer to the same thing. Deep leg track is another name for deflection track, and both terms describe a type of track designed to accommodate building movement or deflection. The primary function of this specialized track is to prevent damage and maintain the integrity of the wall system when a structure shifts or settles.
Understanding Deflection and the Need for Specialized Track
Buildings are constantly subject to movement, which can be caused by various factors such as:
- Thermal expansion and contraction
- Wind loading
- Seismic activity
- Settlement
This movement can exert pressure on walls, particularly at the head where the wall meets the structure above. Without a method to accommodate this movement, the wall studs could be subjected to excessive stress, leading to cracking, buckling, or even structural failure.
Deep Leg Track (Deflection Track) Explained
The provided reference specifically states:
OEG Deep Leg Track also known as Deflection Track is used to accommodate the building deflection at the head of the wall. Deep Leg Track is used in conjunction with OEG Deflection Clips.
This clearly shows that deep leg track and deflection track are essentially the same product. Here’s a breakdown:
Key Features of Deep Leg/Deflection Track
- Purpose: Designed to handle the vertical movement of a building's structural components.
- Installation: Installed at the top of wall studs, allowing the building structure to move without putting pressure on the wall studs themselves.
- Usage: Frequently used with deflection clips to allow the wall to slide vertically while remaining secure.
- Construction: Typically made from metal, with deeper legs compared to standard track. This provides extra space for movement.
How Deflection Track Works
- The deep leg track is secured to the building structure above.
- The wall studs are attached to the track using deflection clips.
- The deflection clips permit vertical movement of the studs within the track's deep leg without applying lateral stress to the wall.
- When the structure moves, the track provides the necessary space, and the clips allow the wall assembly to slide up or down, preventing stress build-up.
Conclusion
In essence, deep leg track and deflection track are interchangeable terms referring to a specialized track designed to accommodate building movement. They are an essential component in modern construction, especially in multi-story buildings where movement is a significant factor. The use of deep leg/deflection track, in conjunction with deflection clips, ensures that walls remain structurally sound while accommodating the dynamic nature of buildings.
