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14 ¼" blockouts were used/ dimensioned in the testing of the TRP-03-187-07.

Please email/ document for me that the 14" standard blockout will be acceptable when used in this system.

Historically, 6"x8" and 6"x12" timber blockouts have utilized lengths ranging from 14" to 14 ¼" when used in W-beam guardrail systems. MwRSF has typically showed the longer length. However, satisfactory impact performance would be expected with either blockout length.

As such, the MGS long-span system would perform in an acceptable manner with using 14" or 14 ¼" section lengths. Please let me know if you have any questions regarding the information contained herein.