ANSI/APA PRG 320 Standard for Performance-Rated Cross-Laminated Timber Provides requirements and test methods for qualification and quality assurance for performance-rated CLT, which is manufactured from solid-sawn lumber or structural composite lumber.
AWC: Final Farm Bill encourages mass timber innovation
WASHINGTON – American Wood Council (AWC) President & CEO Robert Glowinski issued the following statement regarding today’s final passage of the 2018 Farm Bill. The bill includes the Research Title and Wood Innovation Grant language from the Timber Innovation Act (S.538/H.R. 1380), and separately a clarification on what constitutes a “USDA Certified Biobased Product” under federal procurement guidelines. AWC partnered with the National Alliance of Forest Owners and Southeastern Lumber Manufacturers Association.
“Innovation is something everyone can agree on. We are pleased that the final Farm Bill promotes further research and development into mass timber, an emerging category of wood products that will revolutionize how America builds. Use of mass timber will allow the United States to build tall buildings out of renewable, carbon-sequestering materials.”
“AWC thanks the conferees for their time and dedication reconciling their respective Farm Bills. The leadership of House Chairman Mike Conaway (R-TX) and Ranking Member Collin Peterson (D-MN), and Senate Chairman Pat Roberts (R-KS) and Ranking Member Debbie Stabenow (D-MI), as well as the over 50 bipartisan cosponsors of the Timber Innovation Act in both the House and Senate, produced a bill that supports our nation’s forest products industry. We encourage the President to quickly sign this bill into law.”
M-Fire is a big supporter in mass timber and we're asking the President to raise the bar on mass timber. We ask that producers fire treat the mass timber making it safer from fire loss and better for our planet by defending the carbon storage from fire, which also support building tall mass timber that become carbon storage banks. The tariff on imported steel creates a major opportunity for mass timber high rise growth, while adding fire protection would make this movement even greater. In 2018, we have had over 20 arson attacks on high density wood framed buildings. We cannot afford to have an arson attack a mass timber building when it only raw Class B at best it could set this movement back decades and we need it now to off set our need for imported carbon producing steel. We are convinced the first builder that reaches out to M Fire to add our fire protection to there mass timber building will get a significant risk premium reduction and a special discount from us to help promote the first mass timber Defended Carbon Bank in the USA.
When evaluating building materials for fire safety, many factors including ignition temperature, smoke toxicity and flame-spread are considered. Flame-spread, used to describe the surface burning characteristics of building materials, is one of the most tested fire performance properties of a material. The best known test for developing this rating is the American Society for Testing and Materials (ASTM) Test Method E-84, commonly known as the tunnel test.
The tunnel test measures how far and how fast flames spread across the surface of the test sample. In this test, a sample of the material 20 inches wide and 25 feet long, is installed as a ceiling of a test chamber, and exposed to a gas flame at one end. The resulting flame spread rating (FSR) is expressed as a number on a continuous scale where inorganic reinforced cement board is 0 and red oak is 100. The scale is divided into three classes. The most commonly used flame-spread classifications are: Class I or A, with a 0-25 FSR; Class II or B with a 26-75 FSR; and Class III or C with a 76-200 FSR.
Though different species of wood differ in their surface burning (flame-spread) rates, most wood products have a flame-spread rating less than 200 and are considered Class C or III material. A few species have a flame-spread index slightly less than 75 and qualify as Class B or II materials. The chart below compiles information from various sources and shows flame-spread ratings for some common building materials:
The most widely accepted flame-spread classification system appears in the National Fire Protection Association Life Safety Code, NFPA No. 101. This Code groups the following classes in accordance with their flame-spread and smoke development: