Hello in this new video we will see in detail the assembly of a frame. This frame is made of 60 x 20 x 2 tube and the dimensions are 420 by 330.We see the overall plan of the framework and also the flow card of the amount and the crosspiece that frame. Before you start do not forget to subscribe and if you liked this video do not hesitate to share it. The cutting angles of the uprights and transoms are 45 degree angles. Once the flow of the parts made we now have to do an edge preparation. This board preparation consists of grinding to remove burrs and make a small chamfer necessary for welding. This first phase of work done, we will move to assembly. For assembly of a small frame it is necessary to work on a flat surface here I work on a flat iron 250 mm wide by 10 mm thick. the surface you are working on must be absolutely flat. When we go to the assembly of the frame must follow a procedure. This procedure is the following one puts and holds the parts in position, one controls, one points and then one controls. we start with assembly 1/2 frame and the first point of welding is done in the middle of the profile. And then we make a point at both ends of the profile. Then after checking we check if the angle and an angle to 90 degrees we turn are profiled and made 3 solder points on the other side. We repeat the same operation on four sides of the frame The control before welding and the most important phase of the assembly. When the frame and fully pointed we proceed to the verification different dimensions and the control of flatness. For the control of dimensions it is verified that the amounts are well parallel. We understand twice the size between these two amounts and we also check that the sleepers are parallel. To check the angles measure the diagonals. if the two diagonals are identical our frame at right angles if the diagonals have a difference too important it must be rectified before welding. For dimensions the tolerance is plus or minus 1 mm in general, it is the tolerance that is allowed in metal structures. To control the flatness of the frame we put it on a flat surface called a marble, if all the points of this frame touch the marble is that your surface is flat so your frame and plan if all the points in your frame do not touch that marble it is that your surface and left and it is necessary in the same way for the dimensions to rectify before welding. To avoid a too important deformation of the frame it is necessary to make welds in oppositions. We weld from the outside to the inside of the framework respecting the welding order. Thank you for watching this video and I tell you next time and do not forget to subscribe.