A tool is a piece of equipment that (most commonly) provides a mechanical advantage in accomplishing a physical task. The most basic tools are simple machines. For example, a crowbar simply functions as a lever. The further out from the pivot point, the more force is transmitted along the lever.
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BMXTRIX: Building and Ramps - Provides summaries on templates, layering materials, and over a dozen plans for various types of ramps. Free plans and downloadable templates.
Build a Modular Halfpipe - Provides free instructions on how to build a halfpipe with step by step plans, photos and needed materials.
Halfpipe Pictures - Includes photos of the steps taken in building his son's halfpipe. Also includes free plans and FAQs.
Meta Description: [ Halfpipe pictures, ]
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Heckler Magazine - Detailed free ramp plans including funbox, pyramid, launch and various pipes.
How to Build a Skate Ramp - Includes materials list, photos and brief instructions.
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.
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Skatepark Guide - Resource for designing and building concrete skate parks and portable ramp kit parks. Skate park guide book and CD ROM available.
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