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Field splicing is a method used to connect two or more truss sections into a single component. There are many reasons why field splicing may be used. A component may be too large or deep to manufacture, fit on a truck, or handle. A design modification or retrofit may necessitate a field splice, whether due to a change in truss profile or loading. Whatever the reason, field splices are another way to allow for greater flexibility in truss manufacturing, shipping and installation.
A truss may need to be modified or repaired due to accidental damage, holes or notches made by trades, errors in design or manufacturing, or a change requested by the customer. Trusses are typically designed for a specific application. Therefore, truss repairs or modifications must be analyzed on a case by case basis.
In the IECC, an air barrier is defined as “Material(s) assembled and joined together to provide a barrier to air leakage through the building envelope. An air barrier may be a single material or combination of materials.” The air barrier is an important part of integrated thermal and moisture control in a building. Many air barrier materials or strategies may be employed in a building that meet code requirements, however it is crucial to understand their interactions within the assembly.
Controlling sound transmission in buildings through wall, floor and ceiling assemblies is important for the comfort level and enjoyment of building occupants as they live, work and play in these buildings. Sound can come from a variety of sources: both internal to the building and environmental noise from the surrounding areas. The resources below explain how sound transmission is measured, and describe assemblies and other methods to limit noise transmission in buildings using components.