Duplicating a parallel course.
Posted: Wed Oct 20, 2004 3:49 pm
How to set the 2nd of two parallel courses:
Set up the Right-hand (Red) course.
Duplicating this course on the Left (White) will take at least 4 people. (2 measuring teams of 2 people each)
Decide how far apart the courses will be. 4m works usually. Depends on the width of the road. Use a tape measure or a string to set a 4m measuring tool. You will be using this over and over again to set cones at 4m apart. Two people will operate this 4m measuring tool.
Now, starting at Cone1 of the Red course, mark the position of Cone1 on the White course. Use the 4m measuring tool, and use whatever best method you have to make sure that the 1st White cone is squarely across the road from the 1st Red cone. You might, for example, triagulate this from a centerline reflector, or some other road landmark.
Prepare another team of 2 people to operate the "downhill" measuring tool (tape measure or string).
For each White cone N, from 2 to Final-Cone, repeat this process:
Measure the distance from Red Cone N-1 to Red Cone N. Set your "downhill" measuring tape to this distance.
Swing an arc from White Cone N-1 using the "downhill" measuring tape.
Swing an arc from Red Cone N using the 4m measuring tape.
At the intersection of the two arcs, place White cone "N"
Repeat until done.
For example, to set the 5th White cone: Measure from the 4th Red cone to the 5th Red cone. Say this is 2.2m Swing a 2.2m arc from the 4th White cone. Swing a 4m arc from the 5th Red cone. The intersection of the arcs is the location of the 5th White cone.
Set up the Right-hand (Red) course.
Duplicating this course on the Left (White) will take at least 4 people. (2 measuring teams of 2 people each)
Decide how far apart the courses will be. 4m works usually. Depends on the width of the road. Use a tape measure or a string to set a 4m measuring tool. You will be using this over and over again to set cones at 4m apart. Two people will operate this 4m measuring tool.
Now, starting at Cone1 of the Red course, mark the position of Cone1 on the White course. Use the 4m measuring tool, and use whatever best method you have to make sure that the 1st White cone is squarely across the road from the 1st Red cone. You might, for example, triagulate this from a centerline reflector, or some other road landmark.
Prepare another team of 2 people to operate the "downhill" measuring tool (tape measure or string).
For each White cone N, from 2 to Final-Cone, repeat this process:
Measure the distance from Red Cone N-1 to Red Cone N. Set your "downhill" measuring tape to this distance.
Swing an arc from White Cone N-1 using the "downhill" measuring tape.
Swing an arc from Red Cone N using the 4m measuring tape.
At the intersection of the two arcs, place White cone "N"
Repeat until done.
For example, to set the 5th White cone: Measure from the 4th Red cone to the 5th Red cone. Say this is 2.2m Swing a 2.2m arc from the 4th White cone. Swing a 4m arc from the 5th Red cone. The intersection of the arcs is the location of the 5th White cone.
