Step 7: Building up the joints/lugs
Now that the frame is "tied" together, we need to build upon the lugs for strength and rigidity. Recognizing where the primary forces are going to come from and making sure the frame can handle the deflections and torque associated with the style of riding you plan on doing. Now me, I don't plan on showing this frame much in the way of mercy. I will ride it just as hard as I ride my other bikes, it is not going to be a cruiser and it is not going to be a coffee shoppe queen! So, I need to build accordingly!
This means building up the joints in virtually every direction, but especially laterally where I will place a great deal of torque at the bottom bracket and upper and lower head tube. To do this I actually cut roughly 6 inch strips of the string - about 25 of them for each lug. I lay them straight across the joint on the side I am trying to reinforce. I then wrap around the this wrapping around the tube then criss-crossing around say the head tube for instance, creating almost an x accross the front of the tube.
Check out photo number 3 below for this on the bottom bracket as well as photos 4 and 5 for the same at the head tube. This process is repeated time and again while doing some random crossing over as well.