Q re: Chaining up axle to frame

I had to replace my leaf springs so I had to get the whole side off the ground. I kept the trailer hooked to the truck with front landing gear on the ground. I the jacked up the trailer with a 20 ton jack by the frame about a foot behind the rear axle. Once I got it far enough off the ground I used 3 ton jack stands under the frame just ahead and just behine the axles and lower the trailer on to the stands and also kept the 20 ton jack still holding weight on the frame to stabilize it and then I lowered the rear stabilizer jacks to the ground to help support and stabilize the rear. I had no problems with stability doing it this way. My fiver weighs very close to the 14000 gvw when I did it.