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.
Component Manufacturer Topical Library
SBCA generates a large volume of timely, applicable information to its members and the industry at large on a wide variety of topics. Recognizing it can sometimes be difficult to locate a specific resource among this volume of content, we’ve created a topical library on the most prevalent subjects of interest to component manufacturers today. This topical library pulls together the most relevant articles, news items, best practices and other online resources on each topic.
Per ANSI/TPI 1, truss-to-truss connections are under the scope of work of the truss designer. All other connections between a truss and another structural member (i.e. a wall or foundation) are the responsibility of the building designer. The following resources provide guidance to truss designers on the application of truss-to-truss connections and to building officials on what to look for during the building inspection process.
SBCA supports universal building installation of sprinklers for all types of construction, provided they are cost effective and do not create a competitive advantage for one structural element over another. When it comes to properly locating and designing sprinklers within a building, the IBC and IRC reference NFPA 13, 13D, and 13R (depending on the type of building). The resources below will assist the designer in understanding and implementing sprinkler systems in accordance with applicable building codes and referenced fire protection standards.
Recent ASTM E119 testing confirm that an unprotected floor assembly constructed of 2x10s or Flak Jacket coated I-joists do not provide “equivalent performance” to a floor assembly that has a ½” gypsum wallboard.
Framing the American Dream data suggests that installing floor trusses requires less framer skill and experience, results in a floor that requires less bearing locations and more effectively accommodates HVAC, plumbing and electrical infrastructure. SBCA, with the help of its members, has developed a wide variety of resources and tools to help component manufacturers design, build and deliver high quality floor trusses to their customers.
This information is intended to help employers understand their responsibilities regarding the I-9, how to conduct a self-audit, and how to prepare and respond to an HSI audit.
A variety of issues can lead to separation of drywall joints in walls and ceilings. Both environmental factors as well as installation and design factors can contribute to situations where gypsum may develop cracks. The issue has become more widespread as homeowners insist on larger rooms and open floor plans that have large clear span areas. By understanding how and why partition separation or ridging and cracking occur, and by following best practices, designers and builders can reduce the risk of unsightly and costly issues with gypsum board and drywall.
Integrating sprinkler systems into the open webbed configuration of metal plate connected wood trusses can be easy when following best practices. Truss construction can be manipulated with adjustments to panel lengths and web configurations to accommodate most special requirements. However, the Truss Designer needs to account for the additional weight of the sprinkler system and water. Additionally, construction loads encountered during installation need to be accounted for. The resources below will assist the designer in knowing how and where to place these loads.
No matter the species, component manufacturers (CMs) purchase and rely on the accuracy and reliability of many different lumber design properties, including: bending (Fb); shear parallel to grain (Fv), compression perpendicular to grain (Fc^), compression parallel to grain (Fc), tension parallel to grain (Ft), and modulus of elasticity (E and Emin).
According to industry surveys, lumber constitutes roughly 40 percent of the cost of manufacturing a structural component. As a consequence, an adequate supply of North American softwood lumber is vital to the success of component manufacturers. Insect infestations and wildfires (natural forces), as well as protectionist trade actions and logging restrictions (man-made forces) can have a significant impact on the available supply of lumber. Forces that constrain supply at a time when demand increases (i.e. growth in residential construction), can have a severely negative impact on the stability of lumber costs.
While marijuana remains illegal at the federal level, as of January 1, 2018, recreational marijuana is legal in nine states and medical marijuana is legal in 29 states. As more states legalize marijuana, for medical or recreational use, component manufacturers are confronted with potentially needing to adapt their drug policies. Since marijuana remains illegal on the federal level, there is no obligation to allow employees to use marijuana off the clock.
Permanent bracing and continuous lateral restraint is sometimes required within trussed systems to provide long-term stability and/or lateral force resistance. Individual structural components are designed to withstand loading conditions within a particular plane, so there are instances where the building designer may specify the use of permanent building stability bracing. The resources below provide guidance on issues pertaining to the design and application of permanent restraint/bracing.
ANSI/TPI 1 Chapter 3 covers quality standards for the manufacture of metal plate connected wood trusses. It requires the use of a manufacturing quality assurance procedure, and period auditing by an approved inspection agency where required by local jurisdiction.
Framing the American Dream data suggests that installing roof trusses completes the task of framing a building’s roof in less time, requires less framer skill and experience and ultimately results in a roof that enables more open and flexible floor plans. SBCA, with the help of its members, has developed a wide variety of resources and tools to help component manufacturers design, build and deliver high quality roof trusses to their customers.
During component installation, temporary restraint/bracing provides stability against unintended movement or loading prior to the application of exterior sheathing. Structural components are designed to withstand loading conditions over the course of the life of the structure under normal use conditions. However, during construction, insufficient temporary restraint/bracing may lead instability and even collapse under certain conditions such as high winds or seismic events. The resources below provide guidance on issues pertaining to the application of temporary restraint/bracing.
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. The truss repair or modification must result in a truss that is able to safely carry all intended loads. Depending on the extent of damage, some trusses cannot be repaired and must be replaced. Below find more information about truss repairs and modifications.
Framing the American Dream data suggests that installing wall panels completes the task of framing a building’s walls in less time, requires less framer skill and experience and ultimately results in a more reliable building envelope. SBCA, with the help of its members, has developed a wide variety of resources and tools to help component manufacturers design, build and deliver high quality wall panels to their customers.