Interchangeability Of SPS 3 Finger-Jointed Lumber

In accordance with the National Lumber Grades Authority (NLGA), the Canadian Lumber Standards Accreditation Board (CLSAB), and the Canadian Wood Council.

At Parallel Lumber Group, we want our customers to have clear and accurate information about SPS 3 finger-jointed lumber and its interchangeability with non-finger-jointed lumber. This page aims to clarify the specifications, applications, and limitations of using SPS 3 lumber in construction projects in Canada. By understanding these details, you can make informed decisions when selecting materials for your building needs.

What Is SPS 3 Finger-Jointed Lumber?

SPS 3 finger-jointed lumber is a specially graded product designed for vertical stud use only, made in accordance with the NLGA standards. This lumber is visually graded and includes various allowable grades such as No.1, No.2, No.3, Stud, Construction, and Standard. One of its key features is its strength and stability, making it a suitable option for vertical applications where compression is the primary load. It’s essential to note that while SPS 3 finger-jointed lumber can be used interchangeably with non-finger-jointed lumber of the same species, grade, and size, this interchangeability is subject to specific conditions. These conditions also apply to the interchangeability of SPS 3 “Vertical Stud Use Only” lumber (of S-P-F No.2 grade) and S-P-F No. 2 grade non-finger-jointed lumber.

Interchangeability Guidelines

The interchangeability of SPS 3 finger-jointed lumber with non-finger-jointed lumber and of SPS 3 “Vertical Stud Use Only” lumber (of S-P-F No.2 grade) with S-P-F No. 2 grade non-finger-jointed lumber both have certain limitations. Here are the critical guidelines to consider:

  • Load Requirements: SPS 3 finger-jointed lumber should be used only as vertically loaded members in compression, such as wall studs. It is crucial that the bending and tension loads do not exceed short-term load durations (e.g., during wind or seismic events).
  • Moisture and Temperature Conditions: The wood must be protected from wet-service conditions, with moisture content not exceeding 19%. Additionally, it should not be exposed to temperatures exceeding 50 degrees Celsius for extended periods. These conditions are typically met in dry-service environments where the lumber is protected by the building envelope.

Applications For SPS 3 Finger-Jointed Lumber

SPS 3 finger-jointed lumber is primarily intended for specific applications where its unique properties can be fully utilized. These include:

By adhering to these guidelines and applications, you can ensure that you’re using SPS 3 finger-jointed lumber effectively and safely in your construction projects. For further inquiries or to discuss specific project needs, please reach out to our team at Parallel Lumber Group.