zaro

What is TP on Wood?

Published in Wood Inspection 2 mins read

TP on wood typically refers to markings or services associated with Timber Products Inspection, Inc., an organization specializing in the inspection and grading of wood and wood-based products.

Understanding TP in the Context of Wood

When you see "TP" related to wood, it most commonly indicates the involvement of Timber Products Inspection, Inc.. This organization plays a crucial role in the timber industry by providing inspection services to ensure wood products meet specific quality, safety, and treatment standards.

Based on the provided reference:

  • TP stands for Timber Products Inspection, Inc.
  • They operate laboratories and inspection services.
  • TP and its labs are accredited by reputable bodies like the International Accreditation Service (IAS) and the American Lumber Standard Committee (ALSC).
  • Their services include inspecting products that have been preservative treated (to resist decay and insects) and fire retardant treated (to slow the spread of fire).

Why is TP "On" Wood?

The letters "TP" might appear on a piece of wood as part of an inspection stamp or grade mark. This mark serves as an assurance that the product has been inspected by Timber Products Inspection, Inc. and meets the relevant standards for its grade or treatment.

For example, a piece of lumber intended for structural use or treated lumber for outdoor decks might bear a stamp that includes:

  • The grading agency or inspection body's mark (like "TP").
  • The grade of the lumber (e.g., "No. 2," "Select").
  • The wood species or species combination.
  • The mill code.
  • Information about treatment type and retention levels (for treated wood).

This stamp is essential for builders, inspectors, and consumers to verify the quality and intended use of the wood product.

In summary, TP on wood signifies that Timber Products Inspection, Inc. was involved in the inspection process, particularly for treated or graded lumber, ensuring it complies with industry standards.