What hurdle heights and spacings apply to each age group?

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Under 14 and Under 16 (UKA Rule TR22 S1, 2.7kg toppling weight): Age group Race Height To 1st hurdle Between Last to finish Hurdles U16 boys 100m 0.838m 13.0m 8.5m 10.5m 10 U16 boys 300m 0.762m 50.0m 35.0m 40.0m 7 U16 girls 80m 0.762m 12.0m 8.0m 12.0m 8 U16 girls 300m 0.762m 50.0m 35.0m 40.0m 7 U14 boys 80m 0.762m 12.0m 8.0m 12.0m 8 U14 boys 200m 0.762m 20.0m 35.0m 40.0m 5 U14 girls 75m 0.685m 11.5m 7.5m 11.0m 8 U14 girls 200m 0.685m 20.0m 35.0m 40.0m 5 Under 18 (World Athletics Rule TR22.3): men 110m at 0.914m, 300m and 400m at 0.838m; women 100m, 300m and 400m at 0.762m. Home country federation guidance for Under 12s (outside the rules): boys 75m and girls 70m, both at 0.685m with 8 hurdles. Steeplechase barriers are 0.762m for the U16 1500m steeplechase.

Age group	Race	Height	To 1st hurdle	Between	Last to finish	Hurdles
U16 boys	100m	0.838m	13.0m	8.5m	10.5m	10
U16 boys	300m	0.762m	50.0m	35.0m	40.0m	7
U16 girls	80m	0.762m	12.0m	8.0m	12.0m	8
U16 girls	300m	0.762m	50.0m	35.0m	40.0m	7