I'm not sure if you are seeking the documentation template or more of a practical guideline for creating your own load testing templates. Dr. Ananthakrishnan provided some good links, and I would recommend looking at an example load testing plan with simple scenarios. You can create your own test plans/scenarios with a free account on LoadStorm (a cloud-based load testing tool), and experiment with different types of plans and scenarios.
If you want documentation rather than seeing an example, you might find some good resources on http://performance-testing.org.
Thanks alot for your response to me,sure i will follow your able suggestion and create my Testplan document.
If you don't mine ,shall i send you review once i am done with Testplan preparation.
Please send it to me for review when you are done. Also, there are 2 links for downloadable performance/load test plan templates on the performance testing resource site - look in the lefthand column. About the 4-5th link down. One is from Logigear and the other is on StickyMinds.