![]() You can use almost any of them as long as they are about 3" in length and have a 3/8" diameter. However, hook bolts come in a variety a shapes and sizes. The bolt at the bottom of the illustration on the right is also known as a clothesline hook and is the most common for this application. Free ramp plans for a 4 foot mini halfpipe, 8 foot vert halfpipe, 4 foot quarterpipe, grind box and funbox, instructions include step by step pictures and videos. There are even autocad templates to download if you so desire. Tighten the bolts down secure to the 2x4 using nuts and washers. Detailed plans for 3 different mini ramps - a 4 foot, a 5 foot and a 6 foot mini. Remove the coping and drill the 3/8" holes where you have just indicated.įeed a hook bolt into the holes you drilled and place the coping in the notch on the mini ramp, while lining up the bolts with the holes in the 2x4. Use the previously drilled holes to mark the coping. Once the 2x4 has been drilled, place the coping in the notch on the mini ramp. Free ramp plans for a 4 foot mini halfpipe, 8 foot vert halfpipe, 4 foot quarterpipe, grind box and funbox, instructions include step by step pictures and videos. Drill a 3/8" hole in each marked location at a slight downward angle. Also mark two in the middle at 2'-4 apart. Mark the 2x4 about an 1 1/2" down from the top, 6" in from each end. To attach the coping to the mini ramp with bolts, you will need to drill holes in the 2x4 behind where the coping will sit. Free ramp plans for a 4 foot mini halfpipe, 8 foot vert halfpipe, 4 foot quarterpipe, grind box and funbox, instructions include step by step pictures and videos.
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