QUESTION
The lumber used in most metal plate connected wood trusses is either visually- or mechanically-graded solid sawn dimensional lumber. However, the Truss Plate Institute's ANSI/TPI 1 allows the use of structural composite lumber (SCL) products such as laminated veneer lumber (LVL), laminated strand lumber (LSL) and parallel strand lumber (PSL). These engineered wood products can conceivably compete with sawn lumber and complement it in truss designs. The qualification in ANSI/TPI 1 is that the truss designs incorporating these products must be reviewed and approved by the truss designer. Even though the option is available, some structural composite lumber may not be practical in metal plate connected truss applications. As a truss manufacturer, how can I incorporate structural composite lumber (SCL) into my truss designs?
The lumber used in most metal plate connected wood trusses is either visually- or mechanically-graded solid sawn dimensional lumber. However, the Truss Plate Institute's ANSI/TPI 1 allows the use of structural composite lumber (SCL) products such as laminated veneer lumber (LVL), laminated strand lumber (LSL) and parallel strand lumber (PSL). These engineered wood products can conceivably compete with sawn lumber and complement it in truss designs. The qualification in ANSI/TPI 1 is that the truss designs incorporating these products must be reviewed and approved by the truss designer. Even though the option is available, some structural composite lumber may not be practical in metal plate connected truss applications. As a truss manufacturer, how can I incorporate structural composite lumber (SCL) into my truss designs?
This document is effective until December 31, 2025. After that date, this dated version of the document should not be relied upon.
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