Making Horse Jumpsvault
When the 8-foot 4x4 pole is in the center, highlight the entire pole. Halve the pole with a mitre saw or mitre saw into two 4-foot uprights. Put the end of the scale on the end of one of the 4 x 4 uprights.
Draw a midline along the whole length of one side of the mullion. From one end, take 18-inch measurements and highlight the centerline. From this point, make a cross marker along the pole every 3 inch. Do this again with the other upright. Use the 1/4 " inch tap to make a drilled bore at each cross marking along the poles to make a piloting bore.
Drilling square and all the way through the mullion. Switch to the shovel borer and bore each of the holes to 1/2 inches. Measuring up to the centre of one of the 1 x 4 planks, make a marking at this point. Halve the plank at the marking to make two 2-feet-planks.
These are four 1 x 4 planks of the same length. Put the end of one of the 1 x 4 planks over the end of one of the poles at an 90 degree angel. Aim the end of the 1 x 4 at the end of the pole and the end of the pole at the same time.
Insert the Phillips Auger Bits into the borer and tighten the plate with four terrace bolts offset. Rotate the pole one turn and turn the pole up 1 x 4. Repetition this procedure three time with the other 1 x 4 around the pole to make 4 ft at the end of the pole.
Put the new standard at their legs about 10 ft apart. Place the cup pegs into the 1/2" hole on the sides of the uprights.