ANSI 405:2018 pdf free download – Standard for Adhesives for Use in Structural Glued Laminated Tımber
AITC Test T107. 2007. Shear Test. Included in AITC Test Methods for Structural Glued Laminated Timber. American Institute of Timber Construction. Centennial, Colorado. AITC 405-92. 1992. Standard for Adhesives for Use in Structural Glued Laminated Timber. American Institute of Timber Construction. Centennial, Colorado. ANSI A190.1-2017. 2017. American National Standard for Wood Products – Structural Glued Laminated Timber. APA – The Engineered Wood Association. Tacoma, Washington. ANSI/AITC A190.1-2002. 2002. American National Standard for Wood Products – Structural Glued Laminated Timber. American Institute of Timber Construction. Centennial, Colorado. ASTM D905-08(2013). 2008 (Reapproved 2013). Standard Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading. ASTM International. West Conshohocken, Pennsylvania. ASTM D1151-00(2013). 2000 (Reapproved 2013). Standard Practice for Effect of Moisture and Temperature on Adhesive Bonds. ASTM International. West Conshohocken, Pennsylvania. ASTM D1183-03(2011). 2003 (Reapproved 2011). Standard Practices for Resistance of Adhesives to Cyclic Laboratory Aging Conditions. ASTM International. West Conshohocken, Pennsylvania. ASTM D2559-12ae1. 2012. Standard Specification for Adhesives for Bonded Structural Wood Products for Use under Exterior Exposure Conditions. ASTM International. West Conshohocken, Pennsylvania. ASTM D3434-00(2013). 2000 (Reapproved 2013). Standard Test Method for Multiple-Cycle Accelerated Aging Test (Automatic Boil Test) for Exterior Wet Use Wood Adhesives. ASTM International. West Conshohocken, Pennsylvania. ASTM D5266-13. 2013. Standard Practice for Estimating the Percentage of Wood Failure in Adhesive Bonded Joints. ASTM International. West Conshohocken, Pennsylvania. ASTM D7247-16. 2016. Standard Test Method for Evaluating the Shear Strength of Adhesive Bonds in Laminated Wood Products at Elevated Temperatures. ASTM International. West Conshohocken, Pennsylvania.
For the purposes of this screening test, species used shall conform to the species groupings as outlined in ANSI A190.1, which may or may not coincide with those outlined in CSA O112.9. The intent of CSA O112.9 condition B 2 creep test was to simulate temperatures that framing members in a fire- protected assembly could be exposed to at some point during a standard fire test to determine the fire resistance rating. Glulam member may be exposed to longer fire events than protected framing members. Despite the basis of the test being different (protected framing members vs. glulam), the ANSI 405 Committee felt the test condition (in addition to the battery of other tests required by ANSI 405) satisfies the high temperature creep requirements for adhesives for use in glulam.
The automatic boil test in ASTM D3434 has demonstrated its usefulness as a predictor of durability. This test has been a requirement for adhesives qualified under ANSI 405 since its inception. Traditionally, this test has been run for 800 cycles with comparison made to PRF control specimens. Careful inspection of data available from several sources has led to the establishment of performance-based criteria, eliminating the need for a PRF control.
The strength of solid wood specimens and specimens bonded with durable adhesives follow similar degrada- tion trends when subjected to this test. Both follow a logarithmic degradation trend as cycles increase. Most of the strength loss occurs in the first 100 cycles of exposure, with the retained strength leveling off after about 100–200 cycles. Adhesives with insufficient durability will typically continue to lose strength rapidly, rather than “leveling off” like these adhesives. Figure C1 illustrates this trend using actual performance data for solid wood and several adhesives, including samples of PRF, melamine, polyurethane, and isocyanate adhesives from several manufacturers. Each of the adhesives shown meets the performance requirements of this test. The retained strength requirements are permitted to be reduced according to the provisions of the Exception clause if accompanied by high percentages of wood failure. This provision was included to avoid penalizing good performing adhesives, because the wood degraded somewhat more than expected.