I need help with measuremnet for the different hurdles and distances between hurdles?

I have a 13 year old boy and girl and a 11 year old boy as well as a 11year old girl I coach. I need the height, the distance from the start to firs hurdle, the distances between the different hurdle for the different ages. I cant find it anywhere. Please help|||For Olymians, I found this:


Ten equally spaced wooden barriers stand between the world class hurdler and the finish line. They may hit the hurdles repeatedly, and many do. Although they are not penalized by officials, hitting the hurdles is not a good idea for several reasons. It hurts, slows the runner down and occasionally throws a runner's rhythm off and causes a crash.





The 110m hurdles for men and 100m hurdles are for women known as sprint hurdles as opposed to the 400m hurdles events which are sometimes called the “intermediate hurdles.”





The 110m hurdles are 1.07m high and placed 9.14m apart while the women’s sprint hurdles are .84m high and 8.5m apart. They can be lowered for use in the 400m distance to .91m in the men’s event and .76m high for the women. Hurdles in the 400m hurdles races are placed 35m apart and the same location for both men and women.





Lane assignments are critical, as they are in sprints. It’s advantageous to run in the middle lanes with competitors on either side. Some hurdlers, however, are so talented they can win from any lane. Xiang Liu of China, the reigning Olympic champion, won the 2007 IAAF World Championships in Osaka from lane 9 in an excellent time of 12.95 seconds.





The starter in all hurdles races will use the standard “On Your Marks” and “Set” commands before firing the gun. Any athlete who leaves the starting blocks before the gun or faster than the allowable reaction time of 0.100 seconds is judged to have committed a false start. The first false start is charged to the entire field. Any athlete who false starts subsequently is disqualified.


Staying in their lanes





In the one lap event, the hurdlers will lead with their left legs which helps keep them from going out of their lanes. Because they run the entire race in lanes the hurdles are staggered so that each athlete runs the same distance to the first hurdle. The trick to see who is leading the race is to watch who reaches their respective barriers first.





The 400m hurdlers are also very good 400m flat racers. Kerron Clement of the United States, who won the 2007 world championships in a time of 47.61 seconds, beat Michael Johnson’s world indoor 400m record three years ago. His time was 44.57 seconds.





Hurdlers will run heats and semi-finals before racing in the final.


http://www.cbc.ca/olympics/athletics/sto…


Then there is this one:


http://www.trackinfo.org/hurdles101.html


It is very informative.


This one is a sample, I think it is for adults:


http://www.computomarx.com/Sampletx.htm


This one is for kids,,sorta:


http://www.worldalmanacforkids.com/WAKI-…


This is a patent for an adjustable one, kinda neat.


http://www.freepatentsonline.com/5199930…