Crash mat regulations can be found in the SSC Red Book - Appendix D1-D11 starting on page 132.
Please note, there is no definitive rink size standard for NHL rinks, and the rink width, length and corner arc may vary. The most standardized NHL rink is 85’ x 200’. Olympic sized rinks are 98.4' x 197'.
Long Track crash mat regulations are available in the Red Book starting on page 143.
More Resources are available on the Speed Skating Canada website - Safety Resources.
Additional mat safety information from Ontario Speed Skating is coming soon!