Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China quarter pipe manufacturer and distributor of valves, hoses, tubes and pipes. Our oem quarter pipes are suitable for acid, alkali, water, steam, seawater, coal gas and natural gas. They are widely used in petroleum, chemical, paper making, fertilizer, brewing and metallurgy. The use of specialized software of Pro/E and CAD has shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of products. Our high-quality products have been exported to the North Amercia, UK, USA, Germany, Italy, India, France, Australia, Japan.

When the radius used on a transition is the same as the ramp height, it will be vertical at the very lip. Radius’ larger than the height, will result in mellower, less steep “slow” ramps, and radius’ smaller than the height, will result in a steeper, “quicker” ramp. A 6’ foot tall quarter pipe, using a 6 foot radius will be STEEP for some people. This is just used as an example.
In park ramp construction, an “8 foot radius” is considered “stock” or standard. You can do anything you want with radius/height combinations from here, but be careful. Picking your radius based on the height and type of ramp you want will be the hardest part.

There is a lot to know about building a good quarter pipe so this “How To” is lengthy. This is a how to based on my experience with building ramps. This is by no means the only way, or complete and quarter pipes and ramps can come in many different forms. These variations in radius, height, width, obstacles on or around the quarter, are what make every ramp special, and riders different. Keep in mind as you read this how to, that you can take the information provided here, and apply it to any height, radius, width, or type of ramp you want to build. There are some no-no’s to ramp building, and I will try and cover those here, and address the different parts of the ramp that seem to be confusing to people, such as the surface, the coping, and it’s overall construction.

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