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I have a question about the deflection of our generic guardrail. Our current standard allows the use of four different post the 6x8 wood, 8" round wood, W6x9, and W6x8.5 with a rail height at 27.75". For new construction the contractor must use the same post for the entire guardrail run. When guardrail is being repaired after a crash contractor have asked if they can mix post types. Nick Artimovich said this is fine if the deflection distances are close. Where can I get a copy of the crash test reports for the 8" round wood post or the W6x9 steel post? Thanks for your time.
Post type Deflection
|Date||August 19, 2010|
NCHRP 350 Testing
27¾" rail height, 7.25" round SYP post " 3.7 ft D.D. " 2000P TL-3 test by TTI for Arnold Forest Products
27"?? rail height, 6x8 rectangular wood post " 2.7 ft D.D. " 2000P TL-3 test by TTI (G4(2W))
27¾" rail height, W6x8.5 steel post w/ 6x8 wood blockout " 3.3 ft D.D. " 2000P TL-3 test by TTI (Modified G4(1s))
|Date||August 20, 2010|
130 Whittier Research Center
2200 Vine Street
Lincoln, NE 68583-0853
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