Halfpipe Pictures
   Includes photos of the steps taken in building his son's halfpipe. Also includes free plans and FAQs.
   http://www.rickdahlen.com/pipepix/halfpipe.html

Heckler Magazine
   Detailed free ramp plans including funbox, pyramid, launch and various pipes.
   http://www.heckler.com/ramps/index.php

Ramp Plans Dot Org
   A compliation of plans from all over the web with attrition, photos, FAQs, glossary, and related links. Also provides a message board with several topics.
   http://rampplans.org/

Skatepark Guide
   Resource for designing and building concrete skate parks and portable ramp kit parks. Skate park guide book and CD ROM available.
   http://www.skateparkguide.com/