20 years of success

In addition, the ALSC specified uniform methods to assign strength and stiffness values. Studies made concurrently with the development of the standard gave a more precise definition of the performance capabilities of lumber for both single species and species combinations.

Lumber design values are set using American Society for Testing Materials methods approved bY the National Institute of Standards Technology and reviewed by the U.S. Forest Products LaboratorY.

More than just setting reliable standards, PS 20-70 formalized quality control. Through the standard, the lumber industry imposed on itself stringent self-regulation by establishing an independent ALSC Board of Review and establishing an overview inspection force to ensure compliance of grading agencies with the standard.

The Board of Review determines whether minimum standards are being maintained, settles anY disputes and measures performance of approved grading agencies.

Each grading agency is monitored constantly to see that it meets standards. ALSC inspectors conduct random mill surveys, follow-up inspections where needed, and destination checks at wholesale and retail yards and sometimes at job sites. ALSC inspectors also periodically review each agency's quality control records. Finally, the board is empowered to revoke a grading agency's certification if it determines it is not conforming to the standard.

This process separates lumber graded by ALSC authorized agencies from that produced outside the system. An estimated 95% of all lumber used in the U.S. is graded under ALSC overview, Searles points out.

Story at a Glane

Thanks to a battle 20 years ago to finally set tough industry standards, 95% of todaY's di' mension softwood lumber meets stringent American Lumber Standards Committee regulations.. qualitY controls ensure ALSC stamped lumber continues to measure uP.

Provisions in PS 20-70 allow the 20 year old standard to adaPt to changing times. With an ALSC review, it may be amended to include new technologies or rePlace outmoded systems.

The reliability of wood frame buildings is assured by those who deal only in ALSC grademarked lumber.